| 1 | <!DOCTYPE html |
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| 2 | PUBLIC "-//W3C//DTD HTML 4.01//EN"> |
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| 3 | <html lang="en"> |
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| 4 | <head profile="http://www.w3.org/2006/03/hcard http://dublincore.org/documents/2008/08/04/dc-html/"> |
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| 5 | <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
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| 6 | <title>Hypertext Transfer Protocol (HTTP/1.1): Range Requests</title><script> |
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| 7 | var buttonsAdded = false; |
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| 8 | |
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| 9 | function init() { |
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| 10 | var fb = document.createElement("div"); |
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| 11 | fb.className = "feedback noprint"; |
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| 12 | fb.setAttribute("onclick", "feedback();"); |
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| 13 | fb.appendChild(document.createTextNode("feedback")); |
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| 14 | |
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| 15 | var bodyl = document.getElementsByTagName("body"); |
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| 16 | bodyl.item(0).appendChild(fb); |
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| 17 | } |
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| 18 | |
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| 19 | function feedback() { |
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| 20 | toggleButtonsToElementsByName("h1"); |
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| 21 | toggleButtonsToElementsByName("h2"); |
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| 22 | toggleButtonsToElementsByName("h3"); |
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| 23 | toggleButtonsToElementsByName("h4"); |
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| 24 | |
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| 25 | buttonsAdded = !buttonsAdded; |
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| 26 | } |
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| 27 | |
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| 28 | function toggleButtonsToElementsByName(name) { |
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| 29 | var list = document.getElementsByTagName(name); |
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| 30 | for (var i = 0; i < list.length; i++) { |
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| 31 | toggleButton(list.item(i)); |
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| 32 | } |
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| 33 | } |
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| 34 | |
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| 35 | function toggleButton(node) { |
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| 36 | if (! buttonsAdded) { |
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| 37 | |
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| 38 | // docname |
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| 39 | var template = "mailto:ietf-http-wg@w3.org?subject={docname},%20%22{section}%22&body=<{ref}>:"; |
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| 40 | |
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| 41 | var id = node.getAttribute("id"); |
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| 42 | // better id available? |
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| 43 | var titlelinks = node.getElementsByTagName("a"); |
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| 44 | for (var i = 0; i < titlelinks.length; i++) { |
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| 45 | var tl = titlelinks.item(i); |
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| 46 | if (tl.getAttribute("id")) { |
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| 47 | id = tl.getAttribute("id"); |
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| 48 | } |
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| 49 | } |
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| 50 | |
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| 51 | // ref |
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| 52 | var ref = window.location.toString(); |
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| 53 | var hash = ref.indexOf("#"); |
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| 54 | if (hash != -1) { |
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| 55 | ref = ref.substring(0, hash); |
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| 56 | } |
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| 57 | if (id != "") { |
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| 58 | ref += "#" + id; |
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| 59 | } |
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| 60 | |
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| 61 | // docname |
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| 62 | var docname = "draft-ietf-httpbis-p5-range-latest"; |
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| 63 | |
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| 64 | // section |
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| 65 | var section = node.textContent; |
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| 66 | section = section.replace("\u00a0", " "); |
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| 67 | |
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| 68 | // build URI from template |
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| 69 | var uri = template.replace("{docname}", encodeURIComponent(docname)); |
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| 70 | uri = uri.replace("{section}", encodeURIComponent(section)); |
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| 71 | uri = uri.replace("{ref}", encodeURIComponent(ref)); |
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| 72 | |
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| 73 | var button = document.createElement("a"); |
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| 74 | button.className = "fbbutton noprint"; |
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| 75 | button.setAttribute("href", uri); |
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| 76 | button.appendChild(document.createTextNode("send feedback")); |
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| 77 | node.appendChild(button); |
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| 78 | } |
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| 79 | else { |
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| 80 | var buttons = node.getElementsByTagName("a"); |
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| 81 | for (var i = 0; i < buttons.length; i++) { |
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| 82 | var b = buttons.item(i); |
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| 83 | if (b.className == "fbbutton noprint") { |
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| 84 | node.removeChild(b); |
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| 85 | } |
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| 86 | } |
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| 87 | } |
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| 88 | }</script><style type="text/css" title="Xml2Rfc (sans serif)"> |
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| 89 | a { |
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| 90 | text-decoration: none; |
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| 91 | } |
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| 92 | a.smpl { |
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| 93 | color: black; |
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| 94 | } |
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| 95 | a:hover { |
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| 96 | text-decoration: underline; |
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| 97 | } |
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| 98 | a:active { |
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| 99 | text-decoration: underline; |
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| 100 | } |
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| 101 | address { |
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| 102 | margin-top: 1em; |
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| 103 | margin-left: 2em; |
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| 104 | font-style: normal; |
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| 105 | } |
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| 106 | body { |
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| 107 | color: black; |
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| 108 | font-family: verdana, helvetica, arial, sans-serif; |
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| 109 | font-size: 10pt; |
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| 110 | margin-right: 2em; |
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| 111 | } |
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| 112 | cite { |
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| 113 | font-style: normal; |
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| 114 | } |
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| 115 | div.note { |
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| 116 | margin-left: 2em; |
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| 117 | } |
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| 118 | dl { |
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| 119 | margin-left: 2em; |
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| 120 | } |
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| 121 | ul.empty { |
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| 122 | list-style-type: none; |
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| 123 | } |
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| 124 | ul.empty li { |
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| 125 | margin-top: .5em; |
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| 126 | } |
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| 127 | dl p { |
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| 128 | margin-left: 0em; |
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| 129 | } |
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| 130 | dt { |
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| 131 | margin-top: .5em; |
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| 132 | } |
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| 133 | h1 { |
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| 134 | font-size: 14pt; |
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| 135 | line-height: 21pt; |
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| 136 | page-break-after: avoid; |
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| 137 | } |
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| 138 | h1.np { |
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| 139 | page-break-before: always; |
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| 140 | } |
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| 141 | h1 a { |
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| 142 | color: #333333; |
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| 143 | } |
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| 144 | h2 { |
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| 145 | font-size: 12pt; |
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| 146 | line-height: 15pt; |
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| 147 | page-break-after: avoid; |
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| 148 | } |
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| 149 | h3, h4, h5, h6 { |
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| 150 | font-size: 10pt; |
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| 151 | page-break-after: avoid; |
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| 152 | } |
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| 153 | h2 a, h3 a, h4 a, h5 a, h6 a { |
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| 154 | color: black; |
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| 155 | } |
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| 156 | img { |
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| 157 | margin-left: 3em; |
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| 158 | } |
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| 159 | li { |
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| 160 | margin-left: 2em; |
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| 161 | } |
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| 162 | ol { |
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| 163 | margin-left: 2em; |
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| 164 | } |
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| 165 | ol.la { |
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| 166 | list-style-type: lower-alpha; |
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| 167 | } |
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| 168 | ol.ua { |
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| 169 | list-style-type: upper-alpha; |
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| 170 | } |
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| 171 | ol p { |
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| 172 | margin-left: 0em; |
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| 173 | } |
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| 174 | p { |
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| 175 | margin-left: 2em; |
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| 176 | } |
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| 177 | pre { |
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| 178 | margin-left: 3em; |
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| 179 | background-color: lightyellow; |
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| 180 | padding: .25em; |
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| 181 | page-break-inside: avoid; |
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| 182 | } |
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| 183 | pre.text2 { |
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| 184 | border-style: dotted; |
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| 185 | border-width: 1px; |
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| 186 | background-color: #f0f0f0; |
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| 187 | width: 69em; |
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| 188 | } |
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| 189 | pre.inline { |
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| 190 | background-color: white; |
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| 191 | padding: 0em; |
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| 192 | } |
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| 193 | pre.text { |
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| 194 | border-style: dotted; |
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| 195 | border-width: 1px; |
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| 196 | background-color: #f8f8f8; |
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| 197 | width: 69em; |
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| 198 | } |
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| 199 | pre.drawing { |
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| 200 | border-style: solid; |
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| 201 | border-width: 1px; |
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| 202 | background-color: #f8f8f8; |
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| 203 | padding: 2em; |
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| 204 | } |
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| 205 | table { |
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| 206 | margin-left: 2em; |
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| 207 | } |
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| 208 | table.tt { |
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| 209 | vertical-align: top; |
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| 210 | } |
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| 211 | table.full { |
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| 212 | border-style: outset; |
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| 213 | border-width: 1px; |
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| 214 | } |
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| 215 | table.headers { |
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| 216 | border-style: outset; |
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| 217 | border-width: 1px; |
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| 218 | } |
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| 219 | table.tt td { |
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| 220 | vertical-align: top; |
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| 221 | } |
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| 222 | table.full td { |
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| 223 | border-style: inset; |
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| 224 | border-width: 1px; |
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| 225 | } |
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| 226 | table.tt th { |
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| 227 | vertical-align: top; |
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| 228 | } |
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| 229 | table.full th { |
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| 230 | border-style: inset; |
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| 231 | border-width: 1px; |
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| 232 | } |
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| 233 | table.headers th { |
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| 234 | border-style: none none inset none; |
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| 235 | border-width: 1px; |
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| 236 | } |
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| 237 | table.left { |
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| 238 | margin-right: auto; |
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| 239 | } |
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| 240 | table.right { |
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| 241 | margin-left: auto; |
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| 242 | } |
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| 243 | table.center { |
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| 244 | margin-left: auto; |
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| 245 | margin-right: auto; |
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| 246 | } |
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| 247 | caption { |
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| 248 | caption-side: bottom; |
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| 249 | font-weight: bold; |
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| 250 | font-size: 9pt; |
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| 251 | margin-top: .5em; |
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| 252 | } |
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| 253 | |
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| 254 | table.header { |
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| 255 | border-spacing: 1px; |
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| 256 | width: 95%; |
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| 257 | font-size: 10pt; |
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| 258 | color: white; |
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| 259 | } |
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| 260 | td.top { |
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| 261 | vertical-align: top; |
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| 262 | } |
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| 263 | td.topnowrap { |
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| 264 | vertical-align: top; |
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| 265 | white-space: nowrap; |
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| 266 | } |
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| 267 | table.header td { |
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| 268 | background-color: gray; |
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| 269 | width: 50%; |
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| 270 | } |
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| 271 | table.header a { |
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| 272 | color: white; |
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| 273 | } |
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| 274 | td.reference { |
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| 275 | vertical-align: top; |
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| 276 | white-space: nowrap; |
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| 277 | padding-right: 1em; |
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| 278 | } |
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| 279 | thead { |
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| 280 | display:table-header-group; |
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| 281 | } |
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| 282 | ul.toc, ul.toc ul { |
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| 283 | list-style: none; |
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| 284 | margin-left: 1.5em; |
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| 285 | padding-left: 0em; |
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| 286 | } |
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| 287 | ul.toc li { |
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| 288 | line-height: 150%; |
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| 289 | font-weight: bold; |
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| 290 | font-size: 10pt; |
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| 291 | margin-left: 0em; |
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| 292 | } |
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| 293 | ul.toc li li { |
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| 294 | line-height: normal; |
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| 295 | font-weight: normal; |
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| 296 | font-size: 9pt; |
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| 297 | margin-left: 0em; |
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| 298 | } |
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| 299 | li.excluded { |
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| 300 | font-size: 0pt; |
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| 301 | } |
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| 302 | ul p { |
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| 303 | margin-left: 0em; |
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| 304 | } |
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| 305 | ul.ind, ul.ind ul { |
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| 306 | list-style: none; |
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| 307 | margin-left: 1.5em; |
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| 308 | padding-left: 0em; |
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| 309 | page-break-before: avoid; |
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| 310 | } |
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| 311 | ul.ind li { |
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| 312 | font-weight: bold; |
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| 313 | line-height: 200%; |
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| 314 | margin-left: 0em; |
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| 315 | } |
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| 316 | ul.ind li li { |
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| 317 | font-weight: normal; |
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| 318 | line-height: 150%; |
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| 319 | margin-left: 0em; |
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| 320 | } |
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| 321 | .avoidbreak { |
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| 322 | page-break-inside: avoid; |
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| 323 | } |
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| 324 | .bcp14 { |
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| 325 | font-style: normal; |
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| 326 | text-transform: lowercase; |
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| 327 | font-variant: small-caps; |
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| 328 | } |
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| 329 | .comment { |
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| 330 | background-color: yellow; |
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| 331 | } |
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| 332 | .center { |
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| 333 | text-align: center; |
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| 334 | } |
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| 335 | .error { |
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| 336 | color: red; |
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| 337 | font-style: italic; |
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| 338 | font-weight: bold; |
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| 339 | } |
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| 340 | .figure { |
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| 341 | font-weight: bold; |
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| 342 | text-align: center; |
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| 343 | font-size: 9pt; |
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| 344 | } |
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| 345 | .filename { |
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| 346 | color: #333333; |
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| 347 | font-weight: bold; |
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| 348 | font-size: 12pt; |
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| 349 | line-height: 21pt; |
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| 350 | text-align: center; |
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| 351 | } |
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| 352 | .fn { |
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| 353 | font-weight: bold; |
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| 354 | } |
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| 355 | .hidden { |
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| 356 | display: none; |
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| 357 | } |
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| 358 | .left { |
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| 359 | text-align: left; |
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| 360 | } |
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| 361 | .right { |
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| 362 | text-align: right; |
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| 363 | } |
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| 364 | .title { |
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| 365 | color: #990000; |
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| 366 | font-size: 18pt; |
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| 367 | line-height: 18pt; |
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| 368 | font-weight: bold; |
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| 369 | text-align: center; |
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| 370 | margin-top: 36pt; |
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| 371 | } |
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| 372 | .vcardline { |
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| 373 | display: block; |
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| 374 | } |
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| 375 | .warning { |
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| 376 | font-size: 14pt; |
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| 377 | background-color: yellow; |
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| 378 | } |
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| 379 | .feedback { |
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| 380 | position: fixed; |
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| 381 | bottom: 1%; |
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| 382 | right: 1%; |
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| 383 | padding: 3px 5px; |
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| 384 | color: white; |
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| 385 | border-radius: 5px; |
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| 386 | background: #a00000; |
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| 387 | border: 1px solid silver; |
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| 388 | } |
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| 389 | .fbbutton { |
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| 390 | margin-left: 1em; |
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| 391 | color: #303030; |
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| 392 | font-size: small; |
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| 393 | font-weight: normal; |
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| 394 | background: #d0d000; |
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| 395 | padding: 1px 4px; |
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| 396 | border: 1px solid silver; |
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| 397 | border-radius: 5px; |
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| 398 | } |
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| 399 | |
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| 400 | @media print { |
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| 401 | .noprint { |
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| 402 | display: none; |
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| 403 | } |
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| 404 | |
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| 405 | a { |
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| 406 | color: black; |
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| 407 | text-decoration: none; |
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| 408 | } |
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| 409 | |
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| 410 | table.header { |
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| 411 | width: 90%; |
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| 412 | } |
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| 413 | |
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| 414 | td.header { |
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| 415 | width: 50%; |
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| 416 | color: black; |
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| 417 | background-color: white; |
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| 418 | vertical-align: top; |
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| 419 | font-size: 12pt; |
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| 420 | } |
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| 421 | |
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| 422 | ul.toc a:nth-child(2)::after { |
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| 423 | content: leader('.') target-counter(attr(href), page); |
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| 424 | } |
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| 425 | |
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| 426 | ul.ind li li a { |
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| 427 | content: target-counter(attr(href), page); |
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| 428 | } |
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| 429 | |
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| 430 | .print2col { |
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| 431 | column-count: 2; |
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| 432 | -moz-column-count: 2; |
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| 433 | column-fill: auto; |
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| 434 | } |
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| 435 | } |
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| 436 | |
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| 437 | @page { |
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| 438 | @top-left { |
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| 439 | content: "Internet-Draft"; |
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| 440 | } |
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| 441 | @top-right { |
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| 442 | content: "December 2012"; |
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| 443 | } |
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| 444 | @top-center { |
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| 445 | content: "HTTP/1.1 Range Requests"; |
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| 446 | } |
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| 447 | @bottom-left { |
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| 448 | content: "Fielding, et al."; |
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| 449 | } |
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| 450 | @bottom-center { |
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| 451 | content: "Expires June 12, 2013"; |
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| 452 | } |
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| 453 | @bottom-right { |
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| 454 | content: "[Page " counter(page) "]"; |
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| 455 | } |
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| 456 | } |
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| 457 | |
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| 458 | @page:first { |
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| 459 | @top-left { |
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| 460 | content: normal; |
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| 461 | } |
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| 462 | @top-right { |
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| 463 | content: normal; |
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| 464 | } |
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| 465 | @top-center { |
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| 466 | content: normal; |
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| 467 | } |
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| 468 | } |
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| 469 | </style><link rel="Contents" href="#rfc.toc"> |
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| 470 | <link rel="Author" href="#rfc.authors"> |
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| 471 | <link rel="Copyright" href="#rfc.copyrightnotice"> |
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| 472 | <link rel="Index" href="#rfc.index"> |
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| 473 | <link rel="Chapter" title="1 Introduction" href="#rfc.section.1"> |
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| 474 | <link rel="Chapter" title="2 Range Units" href="#rfc.section.2"> |
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| 475 | <link rel="Chapter" title="3 Status Code Definitions" href="#rfc.section.3"> |
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| 476 | <link rel="Chapter" title="4 Responses to a Range Request" href="#rfc.section.4"> |
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| 477 | <link rel="Chapter" title="5 Header Field Definitions" href="#rfc.section.5"> |
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| 478 | <link rel="Chapter" title="6 IANA Considerations" href="#rfc.section.6"> |
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| 479 | <link rel="Chapter" title="7 Security Considerations" href="#rfc.section.7"> |
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| 480 | <link rel="Chapter" title="8 Acknowledgments" href="#rfc.section.8"> |
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| 481 | <link rel="Chapter" href="#rfc.section.9" title="9 References"> |
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| 482 | <link rel="Appendix" title="A Internet Media Type multipart/byteranges" href="#rfc.section.A"> |
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| 483 | <link rel="Appendix" title="B Changes from RFC 2616" href="#rfc.section.B"> |
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| 484 | <link rel="Appendix" title="C Imported ABNF" href="#rfc.section.C"> |
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| 485 | <link rel="Appendix" title="D Collected ABNF" href="#rfc.section.D"> |
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| 486 | <link rel="Appendix" title="E Change Log (to be removed by RFC Editor before publication)" href="#rfc.section.E"> |
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| 487 | <link href="p4-conditional.html" rel="prev"> |
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| 488 | <link href="p6-cache.html" rel="next"> |
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| 489 | <meta name="generator" content="http://greenbytes.de/tech/webdav/rfc2629.xslt, Revision 1.588, 2012-08-25 12:28:24, XSLT vendor: SAXON 8.9 from Saxonica http://www.saxonica.com/"> |
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| 490 | <link rel="schema.dct" href="http://purl.org/dc/terms/"> |
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| 491 | <meta name="dct.creator" content="Fielding, R."> |
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| 492 | <meta name="dct.creator" content="Lafon, Y."> |
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| 493 | <meta name="dct.creator" content="Reschke, J. F."> |
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| 494 | <meta name="dct.identifier" content="urn:ietf:id:draft-ietf-httpbis-p5-range-latest"> |
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| 495 | <meta name="dct.issued" scheme="ISO8601" content="2012-12-09"> |
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| 496 | <meta name="dct.replaces" content="urn:ietf:rfc:2616"> |
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| 497 | <meta name="dct.abstract" content="The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypertext information systems. This document defines range requests and the rules for constructing and combining responses to those requests."> |
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| 498 | <meta name="description" content="The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypertext information systems. This document defines range requests and the rules for constructing and combining responses to those requests."> |
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| 499 | </head> |
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| 500 | <body onload="init();"> |
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| 501 | <table class="header"> |
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| 502 | <tbody> |
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| 503 | <tr> |
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| 504 | <td class="left">HTTPbis Working Group</td> |
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| 505 | <td class="right">R. Fielding, Editor</td> |
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| 506 | </tr> |
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| 507 | <tr> |
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| 508 | <td class="left">Internet-Draft</td> |
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| 509 | <td class="right">Adobe</td> |
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| 510 | </tr> |
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| 511 | <tr> |
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| 512 | <td class="left">Obsoletes: <a href="http://tools.ietf.org/html/rfc2616">2616</a> (if approved) |
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| 513 | </td> |
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| 514 | <td class="right">Y. Lafon, Editor</td> |
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| 515 | </tr> |
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| 516 | <tr> |
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| 517 | <td class="left">Intended status: Standards Track</td> |
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| 518 | <td class="right">W3C</td> |
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| 519 | </tr> |
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| 520 | <tr> |
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| 521 | <td class="left">Expires: June 12, 2013</td> |
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| 522 | <td class="right">J. Reschke, Editor</td> |
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| 523 | </tr> |
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| 524 | <tr> |
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| 525 | <td class="left"></td> |
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| 526 | <td class="right">greenbytes</td> |
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| 527 | </tr> |
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| 528 | <tr> |
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| 529 | <td class="left"></td> |
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| 530 | <td class="right">December 9, 2012</td> |
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| 531 | </tr> |
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| 532 | </tbody> |
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| 533 | </table> |
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| 534 | <p class="title">Hypertext Transfer Protocol (HTTP/1.1): Range Requests<br><span class="filename">draft-ietf-httpbis-p5-range-latest</span></p> |
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| 535 | <h1 id="rfc.abstract"><a href="#rfc.abstract">Abstract</a></h1> |
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| 536 | <p>The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypertext information |
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| 537 | systems. This document defines range requests and the rules for constructing and combining responses to those requests. |
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| 538 | </p> |
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| 539 | <h1 id="rfc.note.1"><a href="#rfc.note.1">Editorial Note (To be removed by RFC Editor)</a></h1> |
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| 540 | <p>Discussion of this draft takes place on the HTTPBIS working group mailing list (ietf-http-wg@w3.org), which is archived at <<a href="http://lists.w3.org/Archives/Public/ietf-http-wg/">http://lists.w3.org/Archives/Public/ietf-http-wg/</a>>. |
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| 541 | </p> |
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| 542 | <p>The current issues list is at <<a href="http://tools.ietf.org/wg/httpbis/trac/report/3">http://tools.ietf.org/wg/httpbis/trac/report/3</a>> and related documents (including fancy diffs) can be found at <<a href="http://tools.ietf.org/wg/httpbis/">http://tools.ietf.org/wg/httpbis/</a>>. |
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| 543 | </p> |
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| 544 | <p>The changes in this draft are summarized in <a href="#changes.since.21" title="Since draft-ietf-httpbis-p5-range-21">Appendix E.3</a>. |
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| 545 | </p> |
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| 546 | <h1><a id="rfc.status" href="#rfc.status">Status of This Memo</a></h1> |
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| 547 | <p>This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.</p> |
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| 548 | <p>Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute |
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| 549 | working documents as Internet-Drafts. The list of current Internet-Drafts is at <a href="http://datatracker.ietf.org/drafts/current/">http://datatracker.ietf.org/drafts/current/</a>. |
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| 550 | </p> |
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| 551 | <p>Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other |
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| 552 | documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as “work |
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| 553 | in progress”. |
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| 554 | </p> |
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| 555 | <p>This Internet-Draft will expire on June 12, 2013.</p> |
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| 556 | <h1><a id="rfc.copyrightnotice" href="#rfc.copyrightnotice">Copyright Notice</a></h1> |
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| 557 | <p>Copyright © 2012 IETF Trust and the persons identified as the document authors. All rights reserved.</p> |
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| 558 | <p>This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (<a href="http://trustee.ietf.org/license-info">http://trustee.ietf.org/license-info</a>) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights |
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| 559 | and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License |
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| 560 | text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified |
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| 561 | BSD License. |
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| 562 | </p> |
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| 563 | <p>This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November |
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| 564 | 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to |
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| 565 | allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) |
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| 566 | controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative |
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| 567 | works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate |
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| 568 | it into languages other than English. |
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| 569 | </p> |
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| 570 | <hr class="noprint"> |
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| 571 | <h1 class="np" id="rfc.toc"><a href="#rfc.toc">Table of Contents</a></h1> |
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| 572 | <ul class="toc"> |
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| 573 | <li><a href="#rfc.section.1">1.</a> <a href="#introduction">Introduction</a><ul> |
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| 574 | <li><a href="#rfc.section.1.1">1.1</a> <a href="#conformance">Conformance and Error Handling</a></li> |
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| 575 | <li><a href="#rfc.section.1.2">1.2</a> <a href="#notation">Syntax Notation</a></li> |
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| 576 | </ul> |
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| 577 | </li> |
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| 578 | <li><a href="#rfc.section.2">2.</a> <a href="#range.units">Range Units</a><ul> |
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| 579 | <li><a href="#rfc.section.2.1">2.1</a> <a href="#range.specifier.registry">Range Specifier Registry</a></li> |
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| 580 | </ul> |
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| 581 | </li> |
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| 582 | <li><a href="#rfc.section.3">3.</a> <a href="#status.code.definitions">Status Code Definitions</a><ul> |
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| 583 | <li><a href="#rfc.section.3.1">3.1</a> <a href="#status.206">206 Partial Content</a></li> |
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| 584 | <li><a href="#rfc.section.3.2">3.2</a> <a href="#status.416">416 Requested Range Not Satisfiable</a></li> |
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| 585 | </ul> |
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| 586 | </li> |
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| 587 | <li><a href="#rfc.section.4">4.</a> <a href="#rfc.section.4">Responses to a Range Request</a><ul> |
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| 588 | <li><a href="#rfc.section.4.1">4.1</a> <a href="#rfc.section.4.1">Response to a Single and Multiple Ranges Request</a></li> |
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| 589 | <li><a href="#rfc.section.4.2">4.2</a> <a href="#combining.byte.ranges">Combining Ranges</a></li> |
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| 590 | </ul> |
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| 591 | </li> |
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| 592 | <li><a href="#rfc.section.5">5.</a> <a href="#header.field.definitions">Header Field Definitions</a><ul> |
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| 593 | <li><a href="#rfc.section.5.1">5.1</a> <a href="#header.accept-ranges">Accept-Ranges</a></li> |
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| 594 | <li><a href="#rfc.section.5.2">5.2</a> <a href="#header.content-range">Content-Range</a></li> |
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| 595 | <li><a href="#rfc.section.5.3">5.3</a> <a href="#header.if-range">If-Range</a></li> |
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| 596 | <li><a href="#rfc.section.5.4">5.4</a> <a href="#header.range">Range</a><ul> |
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| 597 | <li><a href="#rfc.section.5.4.1">5.4.1</a> <a href="#byte.ranges">Byte Ranges</a></li> |
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| 598 | <li><a href="#rfc.section.5.4.2">5.4.2</a> <a href="#range.retrieval.requests">Range Retrieval Requests</a></li> |
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| 599 | </ul> |
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| 600 | </li> |
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| 601 | </ul> |
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| 602 | </li> |
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| 603 | <li><a href="#rfc.section.6">6.</a> <a href="#IANA.considerations">IANA Considerations</a><ul> |
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| 604 | <li><a href="#rfc.section.6.1">6.1</a> <a href="#status.code.registration">Status Code Registration</a></li> |
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| 605 | <li><a href="#rfc.section.6.2">6.2</a> <a href="#header.field.registration">Header Field Registration</a></li> |
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| 606 | <li><a href="#rfc.section.6.3">6.3</a> <a href="#range.specifier.registration">Range Specifier Registration</a></li> |
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| 607 | </ul> |
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| 608 | </li> |
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| 609 | <li><a href="#rfc.section.7">7.</a> <a href="#security.considerations">Security Considerations</a><ul> |
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| 610 | <li><a href="#rfc.section.7.1">7.1</a> <a href="#overlapping.ranges">Overlapping Ranges</a></li> |
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| 611 | </ul> |
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| 612 | </li> |
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| 613 | <li><a href="#rfc.section.8">8.</a> <a href="#acks">Acknowledgments</a></li> |
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| 614 | <li><a href="#rfc.section.9">9.</a> <a href="#rfc.references">References</a><ul> |
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| 615 | <li><a href="#rfc.section.9.1">9.1</a> <a href="#rfc.references.1">Normative References</a></li> |
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| 616 | <li><a href="#rfc.section.9.2">9.2</a> <a href="#rfc.references.2">Informative References</a></li> |
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| 617 | </ul> |
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| 618 | </li> |
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| 619 | <li><a href="#rfc.authors">Authors' Addresses</a></li> |
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| 620 | <li><a href="#rfc.section.A">A.</a> <a href="#internet.media.type.multipart.byteranges">Internet Media Type multipart/byteranges</a></li> |
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| 621 | <li><a href="#rfc.section.B">B.</a> <a href="#changes.from.rfc.2616">Changes from RFC 2616</a></li> |
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| 622 | <li><a href="#rfc.section.C">C.</a> <a href="#imported.abnf">Imported ABNF</a></li> |
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| 623 | <li><a href="#rfc.section.D">D.</a> <a href="#collected.abnf">Collected ABNF</a></li> |
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| 624 | <li><a href="#rfc.section.E">E.</a> <a href="#change.log">Change Log (to be removed by RFC Editor before publication)</a><ul> |
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| 625 | <li><a href="#rfc.section.E.1">E.1</a> <a href="#changes.since.19">Since draft-ietf-httpbis-p5-range-19</a></li> |
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| 626 | <li><a href="#rfc.section.E.2">E.2</a> <a href="#changes.since.20">Since draft-ietf-httpbis-p5-range-20</a></li> |
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| 627 | <li><a href="#rfc.section.E.3">E.3</a> <a href="#changes.since.21">Since draft-ietf-httpbis-p5-range-21</a></li> |
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| 628 | </ul> |
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| 629 | </li> |
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| 630 | <li><a href="#rfc.index">Index</a></li> |
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| 631 | </ul> |
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| 632 | <h1 id="rfc.section.1" class="np"><a href="#rfc.section.1">1.</a> <a id="introduction" href="#introduction">Introduction</a></h1> |
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| 633 | <p id="rfc.section.1.p.1">HTTP clients often encounter interrupted data transfers as a result of canceled requests or dropped connections. When a client |
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| 634 | has stored a partial representation, it is desirable to request the remainder of that representation in a subsequent request |
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| 635 | rather than transfer the entire representation. There are also a number of Web applications that benefit from being able to |
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| 636 | request only a subset of a larger representation, such as a single page of a very large document or only part of an image |
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| 637 | to be rendered by a device with limited local storage. |
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| 638 | </p> |
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| 639 | <p id="rfc.section.1.p.2">This document defines HTTP/1.1 range requests, partial responses, and the multipart/byteranges media type. The protocol for |
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| 640 | range requests is an <em class="bcp14">OPTIONAL</em> feature of HTTP, designed so resources or recipients that do not implement this feature can respond as if it is a normal GET |
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| 641 | request without impacting interoperability. Partial responses are indicated by a distinct status code to not be mistaken for |
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| 642 | full responses by intermediate caches that might not implement the feature. |
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| 643 | </p> |
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| 644 | <p id="rfc.section.1.p.3">Although the HTTP range request mechanism is designed to allow for extensible range types, this specification only defines |
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| 645 | requests for byte ranges. |
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| 646 | </p> |
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| 647 | <h2 id="rfc.section.1.1"><a href="#rfc.section.1.1">1.1</a> <a id="conformance" href="#conformance">Conformance and Error Handling</a></h2> |
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| 648 | <p id="rfc.section.1.1.p.1">The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" |
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| 649 | in this document are to be interpreted as described in <a href="#RFC2119" id="rfc.xref.RFC2119.1"><cite title="Key words for use in RFCs to Indicate Requirement Levels">[RFC2119]</cite></a>. |
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| 650 | </p> |
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| 651 | <p id="rfc.section.1.1.p.2">Conformance criteria and considerations regarding error handling are defined in <a href="p1-messaging.html#conformance" title="Conformance and Error Handling">Section 2.5</a> of <a href="#Part1" id="rfc.xref.Part1.1"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing">[Part1]</cite></a>. |
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| 652 | </p> |
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| 653 | <h2 id="rfc.section.1.2"><a href="#rfc.section.1.2">1.2</a> <a id="notation" href="#notation">Syntax Notation</a></h2> |
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| 654 | <p id="rfc.section.1.2.p.1">This specification uses the Augmented Backus-Naur Form (ABNF) notation of <a href="#RFC5234" id="rfc.xref.RFC5234.1"><cite title="Augmented BNF for Syntax Specifications: ABNF">[RFC5234]</cite></a> with the list rule extension defined in <a href="p1-messaging.html#notation" title="Syntax Notation">Section 1.2</a> of <a href="#Part1" id="rfc.xref.Part1.2"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing">[Part1]</cite></a>. <a href="#imported.abnf" title="Imported ABNF">Appendix C</a> describes rules imported from other documents. <a href="#collected.abnf" title="Collected ABNF">Appendix D</a> shows the collected ABNF with the list rule expanded. |
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| 655 | </p> |
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| 656 | <h1 id="rfc.section.2"><a href="#rfc.section.2">2.</a> <a id="range.units" href="#range.units">Range Units</a></h1> |
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| 657 | <p id="rfc.section.2.p.1">HTTP/1.1 allows a client to request that only part (a range) of the representation be included within the response. HTTP/1.1 |
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| 658 | uses range units in the <a href="#range.retrieval.requests" class="smpl">Range</a> (<a href="#header.range" id="rfc.xref.header.range.1" title="Range">Section 5.4</a>) and <a href="#header.content-range" class="smpl">Content-Range</a> (<a href="#header.content-range" id="rfc.xref.header.content-range.1" title="Content-Range">Section 5.2</a>) header fields. A representation can be broken down into subranges according to various structural units. |
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| 659 | </p> |
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| 660 | <div id="rfc.figure.u.1"></div><pre class="inline"><span id="rfc.iref.g.1"></span><span id="rfc.iref.g.2"></span><span id="rfc.iref.g.3"></span> <a href="#range.units" class="smpl">range-unit</a> = <a href="#range.units" class="smpl">bytes-unit</a> / <a href="#range.units" class="smpl">other-range-unit</a> |
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| 661 | <a href="#range.units" class="smpl">bytes-unit</a> = "bytes" |
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| 662 | <a href="#range.units" class="smpl">other-range-unit</a> = <a href="#imported.abnf" class="smpl">token</a> |
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| 663 | </pre><p id="rfc.section.2.p.3">HTTP/1.1 has been designed to allow implementations of applications that do not depend on knowledge of ranges. The only range |
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| 664 | unit defined by HTTP/1.1 is "bytes". Additional specifiers can be defined as described in <a href="#range.specifier.registry" title="Range Specifier Registry">Section 2.1</a>. |
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| 665 | </p> |
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| 666 | <p id="rfc.section.2.p.4">If a range unit is not understood in a request, a server <em class="bcp14">MUST</em> ignore the whole <a href="#range.retrieval.requests" class="smpl">Range</a> header field (<a href="#header.range" id="rfc.xref.header.range.2" title="Range">Section 5.4</a>). If a range unit is not understood in a response, an intermediary <em class="bcp14">SHOULD</em> pass the response to the client; a client <em class="bcp14">MUST</em> fail. |
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| 667 | </p> |
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| 668 | <h2 id="rfc.section.2.1"><a href="#rfc.section.2.1">2.1</a> <a id="range.specifier.registry" href="#range.specifier.registry">Range Specifier Registry</a></h2> |
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| 669 | <p id="rfc.section.2.1.p.1">The HTTP Range Specifier Registry defines the name space for the range specifier names.</p> |
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| 670 | <p id="rfc.section.2.1.p.2">Registrations <em class="bcp14">MUST</em> include the following fields: |
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| 671 | </p> |
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| 672 | <ul> |
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| 673 | <li>Name</li> |
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| 674 | <li>Description</li> |
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| 675 | <li>Pointer to specification text</li> |
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| 676 | </ul> |
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| 677 | <p id="rfc.section.2.1.p.3">Values to be added to this name space require IETF Review (see <a href="#RFC5226" id="rfc.xref.RFC5226.1"><cite title="Guidelines for Writing an IANA Considerations Section in RFCs">[RFC5226]</cite></a>, <a href="http://tools.ietf.org/html/rfc5226#section-4.1">Section 4.1</a>). |
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| 678 | </p> |
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| 679 | <p id="rfc.section.2.1.p.4">The registry itself is maintained at <<a href="http://www.iana.org/assignments/http-range-specifiers">http://www.iana.org/assignments/http-range-specifiers</a>>. |
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| 680 | </p> |
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| 681 | <h1 id="rfc.section.3"><a href="#rfc.section.3">3.</a> <a id="status.code.definitions" href="#status.code.definitions">Status Code Definitions</a></h1> |
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| 682 | <div id="rfc.iref.3"></div> |
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| 683 | <h2 id="rfc.section.3.1"><a href="#rfc.section.3.1">3.1</a> <a id="status.206" href="#status.206">206 Partial Content</a></h2> |
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| 684 | <p id="rfc.section.3.1.p.1">The server has fulfilled the partial GET request for the resource. The request <em class="bcp14">MUST</em> have included a <a href="#range.retrieval.requests" class="smpl">Range</a> header field (<a href="#header.range" id="rfc.xref.header.range.3" title="Range">Section 5.4</a>) indicating the desired range, and <em class="bcp14">MAY</em> have included an <a href="#header.if-range" class="smpl">If-Range</a> header field (<a href="#header.if-range" id="rfc.xref.header.if-range.1" title="If-Range">Section 5.3</a>) to make the request conditional. |
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| 685 | </p> |
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| 686 | <p id="rfc.section.3.1.p.2">The response <em class="bcp14">MUST</em> include the following header fields: |
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| 687 | </p> |
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| 688 | <ul> |
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| 689 | <li>Either a <a href="#header.content-range" class="smpl">Content-Range</a> header field (<a href="#header.content-range" id="rfc.xref.header.content-range.2" title="Content-Range">Section 5.2</a>) indicating the range included with this response, or a multipart/byteranges <a href="p2-semantics.html#header.content-type" class="smpl">Content-Type</a> including Content-Range fields for each part. If a <a href="p1-messaging.html#header.content-length" class="smpl">Content-Length</a> header field is present in the response, its value <em class="bcp14">MUST</em> match the actual number of octets transmitted in the message body. |
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| 690 | </li> |
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| 691 | <li>Date</li> |
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| 692 | <li> <a href="p6-cache.html#header.cache-control" class="smpl">Cache-Control</a>, <a href="p4-conditional.html#header.etag" class="smpl">ETag</a>, <a href="p6-cache.html#header.expires" class="smpl">Expires</a>, <a href="p2-semantics.html#header.content-location" class="smpl">Content-Location</a> and/or <a href="p2-semantics.html#header.vary" class="smpl">Vary</a>, if the header field would have been sent in a <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a> response to the same request |
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| 693 | </li> |
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| 694 | </ul> |
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| 695 | <p id="rfc.section.3.1.p.3">If a 206 is sent in response to a request with an <a href="#header.if-range" class="smpl">If-Range</a> header field, it <em class="bcp14">SHOULD NOT</em> include other representation header fields. Otherwise, the response <em class="bcp14">MUST</em> include all of the representation header fields that would have been returned with a <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a> response to the same request. |
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| 696 | </p> |
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| 697 | <p id="rfc.section.3.1.p.4">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 4.1.2</a> of <a href="#Part6" id="rfc.xref.Part6.1"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Caching">[Part6]</cite></a>) to determine freshness for 206 responses. |
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| 698 | </p> |
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| 699 | <div id="rfc.iref.3"></div> |
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| 700 | <h2 id="rfc.section.3.2"><a href="#rfc.section.3.2">3.2</a> <a id="status.416" href="#status.416">416 Requested Range Not Satisfiable</a></h2> |
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| 701 | <p id="rfc.section.3.2.p.1">A server <em class="bcp14">SHOULD</em> return a response with this status code if a request included a <a href="#range.retrieval.requests" class="smpl">Range</a> header field (<a href="#header.range" id="rfc.xref.header.range.4" title="Range">Section 5.4</a>), and none of the ranges-specifier values in this field overlap the current extent of the selected resource, and the request |
|---|
| 702 | did not include an <a href="#header.if-range" class="smpl">If-Range</a> header field (<a href="#header.if-range" id="rfc.xref.header.if-range.2" title="If-Range">Section 5.3</a>). (For byte-ranges, this means that the first-byte-pos of all of the byte-range-spec values were greater than the current |
|---|
| 703 | length of the selected resource.) |
|---|
| 704 | </p> |
|---|
| 705 | <p id="rfc.section.3.2.p.2">When this status code is returned for a byte-range request, the response <em class="bcp14">SHOULD</em> include a <a href="#header.content-range" class="smpl">Content-Range</a> header field specifying the current length of the representation (see <a href="#header.content-range" id="rfc.xref.header.content-range.3" title="Content-Range">Section 5.2</a>). This response <em class="bcp14">MUST NOT</em> use the multipart/byteranges content-type. |
|---|
| 706 | </p> |
|---|
| 707 | <div id="rfc.figure.u.2"></div> |
|---|
| 708 | <p>For example:</p> <pre class="text">HTTP/1.1 416 Requested Range Not Satisfiable |
|---|
| 709 | Date: Mon, 20 Jan 2012 15:41:54 GMT |
|---|
| 710 | Content-Range: bytes */47022 |
|---|
| 711 | Content-Type: image/gif |
|---|
| 712 | </pre><div class="note" id="rfc.section.3.2.p.4"> |
|---|
| 713 | <p> <b>Note:</b> Clients cannot depend on servers to send a <a href="#status.416" class="smpl">416 (Requested |
|---|
| 714 | Range Not Satisfiable)</a> response instead of a <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a> response for an unsatisfiable <a href="#range.retrieval.requests" class="smpl">Range</a> header field, since not all servers implement this header field. |
|---|
| 715 | </p> |
|---|
| 716 | </div> |
|---|
| 717 | <h1 id="rfc.section.4"><a href="#rfc.section.4">4.</a> Responses to a Range Request |
|---|
| 718 | </h1> |
|---|
| 719 | <h2 id="rfc.section.4.1"><a href="#rfc.section.4.1">4.1</a> Response to a Single and Multiple Ranges Request |
|---|
| 720 | </h2> |
|---|
| 721 | <p id="rfc.section.4.1.p.1">When an HTTP message includes the content of a single range (for example, a response to a request for a single range, or to |
|---|
| 722 | a request for a set of ranges that overlap without any holes), this content is transmitted with a <a href="#header.content-range" class="smpl">Content-Range</a> header field, and a <a href="p1-messaging.html#header.content-length" class="smpl">Content-Length</a> header field showing the number of bytes actually transferred. For example, |
|---|
| 723 | </p> |
|---|
| 724 | <div id="rfc.figure.u.3"></div><pre class="text">HTTP/1.1 206 Partial Content |
|---|
| 725 | Date: Wed, 15 Nov 1995 06:25:24 GMT |
|---|
| 726 | Last-Modified: Wed, 15 Nov 1995 04:58:08 GMT |
|---|
| 727 | Content-Range: bytes 21010-47021/47022 |
|---|
| 728 | Content-Length: 26012 |
|---|
| 729 | Content-Type: image/gif |
|---|
| 730 | </pre><p id="rfc.section.4.1.p.3">When an HTTP message includes the content of multiple ranges (for example, a response to a request for multiple non-overlapping |
|---|
| 731 | ranges), these are transmitted as a multipart message. The multipart media type used for this purpose is "multipart/byteranges" |
|---|
| 732 | as defined in <a href="#internet.media.type.multipart.byteranges" title="Internet Media Type multipart/byteranges">Appendix A</a>. |
|---|
| 733 | </p> |
|---|
| 734 | <p id="rfc.section.4.1.p.4">A server <em class="bcp14">MAY</em> combine requested ranges when those ranges are overlapping (see <a href="#overlapping.ranges" title="Overlapping Ranges">Section 7.1</a>). |
|---|
| 735 | </p> |
|---|
| 736 | <p id="rfc.section.4.1.p.5">A response to a request for a single range <em class="bcp14">MUST NOT</em> be sent using the multipart/byteranges media type. A response to a request for multiple ranges, whose result is a single range, <em class="bcp14">MAY</em> be sent as a multipart/byteranges media type with one part. A client that cannot decode a multipart/byteranges message <em class="bcp14">MUST NOT</em> ask for multiple ranges in a single request. |
|---|
| 737 | </p> |
|---|
| 738 | <p id="rfc.section.4.1.p.6">When a client asks for multiple ranges in one request, the server <em class="bcp14">SHOULD</em> return them in the order that they appeared in the request. |
|---|
| 739 | </p> |
|---|
| 740 | <h2 id="rfc.section.4.2"><a href="#rfc.section.4.2">4.2</a> <a id="combining.byte.ranges" href="#combining.byte.ranges">Combining Ranges</a></h2> |
|---|
| 741 | <p id="rfc.section.4.2.p.1">A response might transfer only a subrange of a representation if the connection closed prematurely or if the request used |
|---|
| 742 | one or more Range specifications. After several such transfers, a client might have received several ranges of the same representation. |
|---|
| 743 | These ranges can only be safely combined if they all have in common the same strong validator, where "strong validator" is |
|---|
| 744 | defined to be either an entity-tag that is not marked as weak (<a href="p4-conditional.html#header.etag" title="ETag">Section 2.3</a> of <a href="#Part4" id="rfc.xref.Part4.1"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests">[Part4]</cite></a>) or, if no entity-tag is provided, a <a href="p4-conditional.html#header.last-modified" class="smpl">Last-Modified</a> value that is strong in the sense defined by <a href="p4-conditional.html#lastmod.comparison" title="Comparison">Section 2.2.2</a> of <a href="#Part4" id="rfc.xref.Part4.2"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests">[Part4]</cite></a>. |
|---|
| 745 | </p> |
|---|
| 746 | <p id="rfc.section.4.2.p.2">When a client receives an incomplete <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a> or <a href="#status.206" class="smpl">206 (Partial Content)</a> response and already has one or more stored responses for the same method and effective request URI, all of the stored responses |
|---|
| 747 | with the same strong validator <em class="bcp14">MAY</em> be combined with the partial content in this new response. If none of the stored responses contain the same strong validator, |
|---|
| 748 | then this new response corresponds to a new representation and <em class="bcp14">MUST NOT</em> be combined with the existing stored responses. |
|---|
| 749 | </p> |
|---|
| 750 | <p id="rfc.section.4.2.p.3">If the new response is an incomplete <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a> response, then the header fields of that new response are used for any combined response and replace those of the matching |
|---|
| 751 | stored responses. |
|---|
| 752 | </p> |
|---|
| 753 | <p id="rfc.section.4.2.p.4">If the new response is a <a href="#status.206" class="smpl">206 (Partial Content)</a> response and at least one of the matching stored responses is a <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a>, then the combined response header fields consist of the most recent 200 response's header fields. If all of the matching |
|---|
| 754 | stored responses are 206 responses, then the stored response with the most recent header fields is used as the source of header |
|---|
| 755 | fields for the combined response, except that the client <em class="bcp14">MUST</em> use other header fields provided in the new response, aside from <a href="#header.content-range" class="smpl">Content-Range</a>, to replace all instances of the corresponding header fields in the stored response. |
|---|
| 756 | </p> |
|---|
| 757 | <p id="rfc.section.4.2.p.5">The combined response message body consists of the union of partial content ranges in the new response and each of the selected |
|---|
| 758 | responses. If the union consists of the entire range of the representation, then the combined response <em class="bcp14">MUST</em> be recorded as a complete <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a> response with a <a href="p1-messaging.html#header.content-length" class="smpl">Content-Length</a> header field that reflects the complete length. Otherwise, the combined response(s) <em class="bcp14">MUST</em> include a <a href="#header.content-range" class="smpl">Content-Range</a> header field describing the included range(s) and be recorded as incomplete. If the union consists of a discontinuous range |
|---|
| 759 | of the representation, then the client <em class="bcp14">MAY</em> store it as either a multipart range response or as multiple <a href="#status.206" class="smpl">206</a> responses with one continuous range each. |
|---|
| 760 | </p> |
|---|
| 761 | <h1 id="rfc.section.5"><a href="#rfc.section.5">5.</a> <a id="header.field.definitions" href="#header.field.definitions">Header Field Definitions</a></h1> |
|---|
| 762 | <p id="rfc.section.5.p.1">This section defines the syntax and semantics of HTTP/1.1 header fields related to range requests and partial responses.</p> |
|---|
| 763 | <div id="rfc.iref.a.1"></div> |
|---|
| 764 | <h2 id="rfc.section.5.1"><a href="#rfc.section.5.1">5.1</a> <a id="header.accept-ranges" href="#header.accept-ranges">Accept-Ranges</a></h2> |
|---|
| 765 | <p id="rfc.section.5.1.p.1">The "Accept-Ranges" header field allows a resource to indicate its acceptance of range requests.</p> |
|---|
| 766 | <div id="rfc.figure.u.4"></div><pre class="inline"><span id="rfc.iref.g.4"></span><span id="rfc.iref.g.5"></span> <a href="#header.accept-ranges" class="smpl">Accept-Ranges</a> = <a href="#header.accept-ranges" class="smpl">acceptable-ranges</a> |
|---|
| 767 | <a href="#header.accept-ranges" class="smpl">acceptable-ranges</a> = 1#<a href="#range.units" class="smpl">range-unit</a> / "none" |
|---|
| 768 | </pre><p id="rfc.section.5.1.p.3">Origin servers that accept byte-range requests <em class="bcp14">MAY</em> send |
|---|
| 769 | </p> |
|---|
| 770 | <div id="rfc.figure.u.5"></div><pre class="text"> Accept-Ranges: bytes |
|---|
| 771 | </pre><p id="rfc.section.5.1.p.5">but are not required to do so. Clients <em class="bcp14">MAY</em> generate range requests without having received this header field for the resource involved. Range units are defined in <a href="#range.units" title="Range Units">Section 2</a>. |
|---|
| 772 | </p> |
|---|
| 773 | <p id="rfc.section.5.1.p.6">Servers that do not accept any kind of range request for a resource <em class="bcp14">MAY</em> send |
|---|
| 774 | </p> |
|---|
| 775 | <div id="rfc.figure.u.6"></div><pre class="text"> Accept-Ranges: none |
|---|
| 776 | </pre><p id="rfc.section.5.1.p.8">to advise the client not to attempt a range request.</p> |
|---|
| 777 | <div id="rfc.iref.c.1"></div> |
|---|
| 778 | <h2 id="rfc.section.5.2"><a href="#rfc.section.5.2">5.2</a> <a id="header.content-range" href="#header.content-range">Content-Range</a></h2> |
|---|
| 779 | <p id="rfc.section.5.2.p.1">The "Content-Range" header field is sent with a partial representation to specify where in the full representation the payload |
|---|
| 780 | body is intended to be applied. |
|---|
| 781 | </p> |
|---|
| 782 | <p id="rfc.section.5.2.p.2">Range units are defined in <a href="#range.units" title="Range Units">Section 2</a>. |
|---|
| 783 | </p> |
|---|
| 784 | <div id="rfc.figure.u.7"></div><pre class="inline"><span id="rfc.iref.g.6"></span><span id="rfc.iref.g.7"></span><span id="rfc.iref.g.8"></span><span id="rfc.iref.g.9"></span> <a href="#header.content-range" class="smpl">Content-Range</a> = <a href="#header.content-range" class="smpl">byte-content-range-spec</a> |
|---|
| 785 | / <a href="#header.content-range" class="smpl">other-content-range-spec</a> |
|---|
| 786 | |
|---|
| 787 | <a href="#header.content-range" class="smpl">byte-content-range-spec</a> = <a href="#range.units" class="smpl">bytes-unit</a> <a href="#imported.abnf" class="smpl">SP</a> |
|---|
| 788 | <a href="#header.content-range" class="smpl">byte-range-resp-spec</a> "/" |
|---|
| 789 | ( <a href="#header.content-range" class="smpl">instance-length</a> / "*" ) |
|---|
| 790 | |
|---|
| 791 | <a href="#header.content-range" class="smpl">byte-range-resp-spec</a> = (<a href="#rule.ranges-specifier" class="smpl">first-byte-pos</a> "-" <a href="#rule.ranges-specifier" class="smpl">last-byte-pos</a>) |
|---|
| 792 | / "*" |
|---|
| 793 | |
|---|
| 794 | <a href="#header.content-range" class="smpl">instance-length</a> = 1*<a href="#imported.abnf" class="smpl">DIGIT</a> |
|---|
| 795 | |
|---|
| 796 | <a href="#header.content-range" class="smpl">other-content-range-spec</a> = <a href="#range.units" class="smpl">other-range-unit</a> <a href="#imported.abnf" class="smpl">SP</a> |
|---|
| 797 | <a href="#header.content-range" class="smpl">other-range-resp-spec</a> |
|---|
| 798 | <a href="#header.content-range" class="smpl">other-range-resp-spec</a> = *<a href="#imported.abnf" class="smpl">CHAR</a> |
|---|
| 799 | </pre><p id="rfc.section.5.2.p.4">The header field <em class="bcp14">SHOULD</em> indicate the total length of the full representation, unless this length is unknown or difficult to determine. The asterisk |
|---|
| 800 | "*" character means that the instance-length is unknown at the time when the response was generated. |
|---|
| 801 | </p> |
|---|
| 802 | <p id="rfc.section.5.2.p.5">Unlike byte-ranges-specifier values (see <a href="#byte.ranges" title="Byte Ranges">Section 5.4.1</a>), a byte-range-resp-spec <em class="bcp14">MUST</em> only specify one range, and <em class="bcp14">MUST</em> contain absolute byte positions for both the first and last byte of the range. |
|---|
| 803 | </p> |
|---|
| 804 | <p id="rfc.section.5.2.p.6">A byte-content-range-spec with a byte-range-resp-spec whose last-byte-pos value is less than its first-byte-pos value, or |
|---|
| 805 | whose instance-length value is less than or equal to its last-byte-pos value, is invalid. The recipient of an invalid byte-content-range-spec <em class="bcp14">MUST</em> ignore it and any content transferred along with it. |
|---|
| 806 | </p> |
|---|
| 807 | <p id="rfc.section.5.2.p.7">In the case of a byte range request: a server sending a response with status code <a href="#status.416" class="smpl">416 (Requested Range Not |
|---|
| 808 | Satisfiable)</a> <em class="bcp14">SHOULD</em> include a Content-Range field with a byte-range-resp-spec of "*". The instance-length specifies the current length of the |
|---|
| 809 | selected resource. A response with status code <a href="#status.206" class="smpl">206 (Partial Content)</a> <em class="bcp14">MUST NOT</em> include a Content-Range field with a byte-range-resp-spec of "*". |
|---|
| 810 | </p> |
|---|
| 811 | <p id="rfc.section.5.2.p.8">The "Content-Range" header field has no meaning for status codes that do not explicitly describe its semantic. Currently, |
|---|
| 812 | only status codes <a href="#status.206" class="smpl">206 (Partial Content)</a> and <a href="#status.416" class="smpl">416 (Requested Range Not Satisfiable)</a> describe the meaning of this header field. |
|---|
| 813 | </p> |
|---|
| 814 | <p id="rfc.section.5.2.p.9">Examples of byte-content-range-spec values, assuming that the representation contains a total of 1234 bytes: </p> |
|---|
| 815 | <ul> |
|---|
| 816 | <li>The first 500 bytes: |
|---|
| 817 | <div id="rfc.figure.u.8"></div><pre class="text"> bytes 0-499/1234 |
|---|
| 818 | </pre> </li> |
|---|
| 819 | <li>The second 500 bytes: |
|---|
| 820 | <div id="rfc.figure.u.9"></div><pre class="text"> bytes 500-999/1234 |
|---|
| 821 | </pre> </li> |
|---|
| 822 | <li>All except for the first 500 bytes: |
|---|
| 823 | <div id="rfc.figure.u.10"></div><pre class="text"> bytes 500-1233/1234 |
|---|
| 824 | </pre> </li> |
|---|
| 825 | <li>The last 500 bytes: |
|---|
| 826 | <div id="rfc.figure.u.11"></div><pre class="text"> bytes 734-1233/1234 |
|---|
| 827 | </pre> </li> |
|---|
| 828 | </ul> |
|---|
| 829 | <p id="rfc.section.5.2.p.10">If the server ignores a byte-range-spec (for example if it is syntactically invalid, or if it might be seen as a denial-of-service |
|---|
| 830 | attack), the server <em class="bcp14">SHOULD</em> treat the request as if the invalid <a href="#range.retrieval.requests" class="smpl">Range</a> header field did not exist. (Normally, this means return a <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a> response containing the full representation). |
|---|
| 831 | </p> |
|---|
| 832 | <div id="rfc.iref.i.1"></div> |
|---|
| 833 | <h2 id="rfc.section.5.3"><a href="#rfc.section.5.3">5.3</a> <a id="header.if-range" href="#header.if-range">If-Range</a></h2> |
|---|
| 834 | <p id="rfc.section.5.3.p.1">If a client has a partial copy of a representation and wishes to have an up-to-date copy of the entire representation, it |
|---|
| 835 | could use the <a href="#range.retrieval.requests" class="smpl">Range</a> header field with a conditional GET (using either or both of <a href="p4-conditional.html#header.if-unmodified-since" class="smpl">If-Unmodified-Since</a> and <a href="p4-conditional.html#header.if-match" class="smpl">If-Match</a>.) However, if the condition fails because the representation has been modified, the client would then have to make a second |
|---|
| 836 | request to obtain the entire current representation. |
|---|
| 837 | </p> |
|---|
| 838 | <p id="rfc.section.5.3.p.2">The "If-Range" header field allows a client to "short-circuit" the second request. Informally, its meaning is "if the representation |
|---|
| 839 | is unchanged, send me the part(s) that I am missing; otherwise, send me the entire new representation". |
|---|
| 840 | </p> |
|---|
| 841 | <div id="rfc.figure.u.12"></div><pre class="inline"><span id="rfc.iref.g.10"></span> <a href="#header.if-range" class="smpl">If-Range</a> = <a href="#imported.abnf" class="smpl">entity-tag</a> / <a href="#imported.abnf" class="smpl">HTTP-date</a> |
|---|
| 842 | </pre><p id="rfc.section.5.3.p.4">Clients <em class="bcp14">MUST NOT</em> use an entity-tag marked as weak in an If-Range field value and <em class="bcp14">MUST NOT</em> use a <a href="p4-conditional.html#header.last-modified" class="smpl">Last-Modified</a> date in an If-Range field value unless it has no entity-tag for the representation and the Last-Modified date it does have |
|---|
| 843 | for the representation is strong in the sense defined by <a href="p4-conditional.html#lastmod.comparison" title="Comparison">Section 2.2.2</a> of <a href="#Part4" id="rfc.xref.Part4.3"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests">[Part4]</cite></a>. |
|---|
| 844 | </p> |
|---|
| 845 | <p id="rfc.section.5.3.p.5">A server that evaluates a conditional range request that is applicable to one of its representations <em class="bcp14">MUST</em> evaluate the condition as false if the entity-tag used as a validator is marked as weak or, when an HTTP-date is used as the |
|---|
| 846 | validator, if the date value is not strong in the sense defined by <a href="p4-conditional.html#lastmod.comparison" title="Comparison">Section 2.2.2</a> of <a href="#Part4" id="rfc.xref.Part4.4"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests">[Part4]</cite></a>. (A server can distinguish between a valid HTTP-date and any form of entity-tag by examining the first two characters.) |
|---|
| 847 | </p> |
|---|
| 848 | <p id="rfc.section.5.3.p.6">The If-Range header field <em class="bcp14">SHOULD</em> only be sent by clients together with a Range header field. The If-Range header field <em class="bcp14">MUST</em> be ignored if it is received in a request that does not include a Range header field. The If-Range header field <em class="bcp14">MUST</em> be ignored by a server that does not support the sub-range operation. |
|---|
| 849 | </p> |
|---|
| 850 | <p id="rfc.section.5.3.p.7">If the validator given in the If-Range header field matches the current validator for the selected representation of the target |
|---|
| 851 | resource, then the server <em class="bcp14">SHOULD</em> send the specified sub-range of the representation using a <a href="#status.206" class="smpl">206 (Partial Content)</a> response. If the validator does not match, then the server <em class="bcp14">SHOULD</em> send the entire representation using a <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a> response. |
|---|
| 852 | </p> |
|---|
| 853 | <div id="rfc.iref.r.1"></div> |
|---|
| 854 | <h2 id="rfc.section.5.4"><a href="#rfc.section.5.4">5.4</a> <a id="header.range" href="#header.range">Range</a></h2> |
|---|
| 855 | <h3 id="rfc.section.5.4.1"><a href="#rfc.section.5.4.1">5.4.1</a> <a id="byte.ranges" href="#byte.ranges">Byte Ranges</a></h3> |
|---|
| 856 | <p id="rfc.section.5.4.1.p.1">Since all HTTP representations are transferred as sequences of bytes, the concept of a byte range is meaningful for any HTTP |
|---|
| 857 | representation. (However, not all clients and servers need to support byte-range operations.) |
|---|
| 858 | </p> |
|---|
| 859 | <p id="rfc.section.5.4.1.p.2">Byte range specifications in HTTP apply to the sequence of bytes in the representation data (not necessarily the same as the |
|---|
| 860 | message body). |
|---|
| 861 | </p> |
|---|
| 862 | <div id="rule.ranges-specifier"> |
|---|
| 863 | <p id="rfc.section.5.4.1.p.3"> A byte range operation <em class="bcp14">MAY</em> specify a single range of bytes, or a set of ranges within a single representation. |
|---|
| 864 | </p> |
|---|
| 865 | </div> |
|---|
| 866 | <div id="rfc.figure.u.13"></div><pre class="inline"><span id="rfc.iref.g.11"></span><span id="rfc.iref.g.12"></span><span id="rfc.iref.g.13"></span><span id="rfc.iref.g.14"></span><span id="rfc.iref.g.15"></span><span id="rfc.iref.g.16"></span> <a href="#rule.ranges-specifier" class="smpl">byte-ranges-specifier</a> = <a href="#range.units" class="smpl">bytes-unit</a> "=" <a href="#rule.ranges-specifier" class="smpl">byte-range-set</a> |
|---|
| 867 | <a href="#rule.ranges-specifier" class="smpl">byte-range-set</a> = 1#( <a href="#rule.ranges-specifier" class="smpl">byte-range-spec</a> / <a href="#rule.ranges-specifier" class="smpl">suffix-byte-range-spec</a> ) |
|---|
| 868 | <a href="#rule.ranges-specifier" class="smpl">byte-range-spec</a> = <a href="#rule.ranges-specifier" class="smpl">first-byte-pos</a> "-" [ <a href="#rule.ranges-specifier" class="smpl">last-byte-pos</a> ] |
|---|
| 869 | <a href="#rule.ranges-specifier" class="smpl">first-byte-pos</a> = 1*<a href="#imported.abnf" class="smpl">DIGIT</a> |
|---|
| 870 | <a href="#rule.ranges-specifier" class="smpl">last-byte-pos</a> = 1*<a href="#imported.abnf" class="smpl">DIGIT</a> |
|---|
| 871 | </pre><p id="rfc.section.5.4.1.p.5">The first-byte-pos value in a byte-range-spec gives the byte-offset of the first byte in a range. The last-byte-pos value |
|---|
| 872 | gives the byte-offset of the last byte in the range; that is, the byte positions specified are inclusive. Byte offsets start |
|---|
| 873 | at zero. |
|---|
| 874 | </p> |
|---|
| 875 | <p id="rfc.section.5.4.1.p.6">If the last-byte-pos value is present, it <em class="bcp14">MUST</em> be greater than or equal to the first-byte-pos in that byte-range-spec, or the byte-range-spec is syntactically invalid. The |
|---|
| 876 | recipient of a byte-range-set that includes one or more syntactically invalid byte-range-spec values <em class="bcp14">MUST</em> ignore the header field that includes that byte-range-set. |
|---|
| 877 | </p> |
|---|
| 878 | <p id="rfc.section.5.4.1.p.7">If the last-byte-pos value is absent, or if the value is greater than or equal to the current length of the representation |
|---|
| 879 | data, last-byte-pos is taken to be equal to one less than the current length of the representation in bytes. |
|---|
| 880 | </p> |
|---|
| 881 | <p id="rfc.section.5.4.1.p.8">By its choice of last-byte-pos, a client can limit the number of bytes retrieved without knowing the size of the representation.</p> |
|---|
| 882 | <div id="rfc.figure.u.14"></div><pre class="inline"><span id="rfc.iref.g.17"></span><span id="rfc.iref.g.18"></span> <a href="#rule.ranges-specifier" class="smpl">suffix-byte-range-spec</a> = "-" <a href="#rule.ranges-specifier" class="smpl">suffix-length</a> |
|---|
| 883 | <a href="#rule.ranges-specifier" class="smpl">suffix-length</a> = 1*<a href="#imported.abnf" class="smpl">DIGIT</a> |
|---|
| 884 | </pre><p id="rfc.section.5.4.1.p.10">A suffix-byte-range-spec is used to specify the suffix of the representation data, of a length given by the suffix-length |
|---|
| 885 | value. (That is, this form specifies the last N bytes of a representation.) If the representation is shorter than the specified |
|---|
| 886 | suffix-length, the entire representation is used. |
|---|
| 887 | </p> |
|---|
| 888 | <p id="rfc.section.5.4.1.p.11">If a syntactically valid byte-range-set includes at least one byte-range-spec whose first-byte-pos is less than the current |
|---|
| 889 | length of the representation, or at least one suffix-byte-range-spec with a non-zero suffix-length, then the byte-range-set |
|---|
| 890 | is satisfiable. Otherwise, the byte-range-set is unsatisfiable. If the byte-range-set is unsatisfiable, the server <em class="bcp14">SHOULD</em> return a response with a <a href="#status.416" class="smpl">416 (Requested Range Not Satisfiable)</a> status code. Otherwise, the server <em class="bcp14">SHOULD</em> return a response with a <a href="#status.206" class="smpl">206 (Partial Content)</a> status code containing the satisfiable ranges of the representation. |
|---|
| 891 | </p> |
|---|
| 892 | <p id="rfc.section.5.4.1.p.12">In the byte range syntax, <a href="#rule.ranges-specifier" class="smpl">first-byte-pos</a>, <a href="#rule.ranges-specifier" class="smpl">last-byte-pos</a>, and <a href="#rule.ranges-specifier" class="smpl">suffix-length</a> are expressed as decimal number of octets. Since there is no predefined limit to the length of an HTTP payload, recipients <em class="bcp14">SHOULD</em> anticipate potentially large decimal numerals and prevent parsing errors due to integer conversion overflows. |
|---|
| 893 | </p> |
|---|
| 894 | <p id="rfc.section.5.4.1.p.13">Examples of byte-ranges-specifier values (assuming a representation of length 10000): </p> |
|---|
| 895 | <ul> |
|---|
| 896 | <li>The first 500 bytes (byte offsets 0-499, inclusive): |
|---|
| 897 | <div id="rfc.figure.u.15"></div><pre class="text"> bytes=0-499 |
|---|
| 898 | </pre> </li> |
|---|
| 899 | <li>The second 500 bytes (byte offsets 500-999, inclusive): |
|---|
| 900 | <div id="rfc.figure.u.16"></div><pre class="text"> bytes=500-999 |
|---|
| 901 | </pre> </li> |
|---|
| 902 | <li>The final 500 bytes (byte offsets 9500-9999, inclusive): |
|---|
| 903 | <div id="rfc.figure.u.17"></div><pre class="text"> bytes=-500 |
|---|
| 904 | </pre> Or: <div id="rfc.figure.u.18"></div><pre class="text"> bytes=9500- |
|---|
| 905 | </pre> </li> |
|---|
| 906 | <li>The first and last bytes only (bytes 0 and 9999): |
|---|
| 907 | <div id="rfc.figure.u.19"></div><pre class="text"> bytes=0-0,-1 |
|---|
| 908 | </pre> </li> |
|---|
| 909 | <li>Several legal but not canonical specifications of the second 500 bytes (byte offsets 500-999, inclusive): |
|---|
| 910 | <div id="rfc.figure.u.20"></div><pre class="text"> bytes=500-600,601-999 |
|---|
| 911 | bytes=500-700,601-999 |
|---|
| 912 | </pre> </li> |
|---|
| 913 | </ul> |
|---|
| 914 | <h3 id="rfc.section.5.4.2"><a href="#rfc.section.5.4.2">5.4.2</a> <a id="range.retrieval.requests" href="#range.retrieval.requests">Range Retrieval Requests</a></h3> |
|---|
| 915 | <p id="rfc.section.5.4.2.p.1">The "Range" header field defines the GET method (conditional or not) to request one or more sub-ranges of the response representation |
|---|
| 916 | data, instead of the entire representation data. |
|---|
| 917 | </p> |
|---|
| 918 | <div id="rfc.figure.u.21"></div><pre class="inline"><span id="rfc.iref.g.19"></span> <a href="#range.retrieval.requests" class="smpl">Range</a> = <a href="#rule.ranges-specifier" class="smpl">byte-ranges-specifier</a> / <a href="#range.retrieval.requests" class="smpl">other-ranges-specifier</a> |
|---|
| 919 | <a href="#range.retrieval.requests" class="smpl">other-ranges-specifier</a> = <a href="#range.units" class="smpl">other-range-unit</a> "=" <a href="#range.retrieval.requests" class="smpl">other-range-set</a> |
|---|
| 920 | <a href="#range.retrieval.requests" class="smpl">other-range-set</a> = 1*<a href="#imported.abnf" class="smpl">CHAR</a> |
|---|
| 921 | </pre><p id="rfc.section.5.4.2.p.3">A server <em class="bcp14">MAY</em> ignore the Range header field. However, origin servers and intermediate caches ought to support byte ranges when possible, |
|---|
| 922 | since Range supports efficient recovery from partially failed transfers, and supports efficient partial retrieval of large |
|---|
| 923 | representations. |
|---|
| 924 | </p> |
|---|
| 925 | <p id="rfc.section.5.4.2.p.4">If the server supports the Range header field and the specified range or ranges are appropriate for the representation: </p> |
|---|
| 926 | <ul> |
|---|
| 927 | <li>The presence of a Range header field in an unconditional GET modifies what is returned if the GET is otherwise successful. |
|---|
| 928 | In other words, the response carries a status code of <a href="#status.206" class="smpl">206 (Partial Content)</a> instead of <a href="p2-semantics.html#status.200" class="smpl">200 (OK)</a>. |
|---|
| 929 | </li> |
|---|
| 930 | <li>The presence of a Range header field in a conditional GET (a request using one or both of <a href="p4-conditional.html#header.if-modified-since" class="smpl">If-Modified-Since</a> and <a href="p4-conditional.html#header.if-none-match" class="smpl">If-None-Match</a>, or one or both of <a href="p4-conditional.html#header.if-unmodified-since" class="smpl">If-Unmodified-Since</a> and <a href="p4-conditional.html#header.if-match" class="smpl">If-Match</a>) modifies what is returned if the GET is otherwise successful and the condition is true. It does not affect the <a href="p4-conditional.html#status.304" class="smpl">304 (Not Modified)</a> response returned if the conditional is false. |
|---|
| 931 | </li> |
|---|
| 932 | </ul> |
|---|
| 933 | <p id="rfc.section.5.4.2.p.5">In some cases, it might be more appropriate to use the If-Range header field (see <a href="#header.if-range" id="rfc.xref.header.if-range.3" title="If-Range">Section 5.3</a>) in addition to the Range header field. |
|---|
| 934 | </p> |
|---|
| 935 | <p id="rfc.section.5.4.2.p.6">If a proxy that supports ranges receives a Range request, forwards the request to an inbound server, and receives an entire |
|---|
| 936 | representation in reply, it <em class="bcp14">MAY</em> only return the requested range to its client. |
|---|
| 937 | </p> |
|---|
| 938 | <h1 id="rfc.section.6"><a href="#rfc.section.6">6.</a> <a id="IANA.considerations" href="#IANA.considerations">IANA Considerations</a></h1> |
|---|
| 939 | <h2 id="rfc.section.6.1"><a href="#rfc.section.6.1">6.1</a> <a id="status.code.registration" href="#status.code.registration">Status Code Registration</a></h2> |
|---|
| 940 | <p id="rfc.section.6.1.p.1">The HTTP Status Code Registry located at <<a href="http://www.iana.org/assignments/http-status-codes">http://www.iana.org/assignments/http-status-codes</a>> shall be updated with the registrations below: |
|---|
| 941 | </p> |
|---|
| 942 | <div id="rfc.table.1"> |
|---|
| 943 | <div id="iana.status.code.registration.table"></div> |
|---|
| 944 | <table class="tt full left" cellpadding="3" cellspacing="0"> |
|---|
| 945 | <thead> |
|---|
| 946 | <tr> |
|---|
| 947 | <th>Value</th> |
|---|
| 948 | <th>Description</th> |
|---|
| 949 | <th>Reference</th> |
|---|
| 950 | </tr> |
|---|
| 951 | </thead> |
|---|
| 952 | <tbody> |
|---|
| 953 | <tr> |
|---|
| 954 | <td class="left">206</td> |
|---|
| 955 | <td class="left">Partial Content</td> |
|---|
| 956 | <td class="left"> <a href="#status.206" id="rfc.xref.status.206.1" title="206 Partial Content">Section 3.1</a> |
|---|
| 957 | </td> |
|---|
| 958 | </tr> |
|---|
| 959 | <tr> |
|---|
| 960 | <td class="left">416</td> |
|---|
| 961 | <td class="left">Requested Range Not Satisfiable</td> |
|---|
| 962 | <td class="left"> <a href="#status.416" id="rfc.xref.status.416.1" title="416 Requested Range Not Satisfiable">Section 3.2</a> |
|---|
| 963 | </td> |
|---|
| 964 | </tr> |
|---|
| 965 | </tbody> |
|---|
| 966 | </table> |
|---|
| 967 | </div> |
|---|
| 968 | <h2 id="rfc.section.6.2"><a href="#rfc.section.6.2">6.2</a> <a id="header.field.registration" href="#header.field.registration">Header Field Registration</a></h2> |
|---|
| 969 | <p id="rfc.section.6.2.p.1">The Message Header Field Registry located at <<a href="http://www.iana.org/assignments/message-headers/message-header-index.html">http://www.iana.org/assignments/message-headers/message-header-index.html</a>> shall be updated with the permanent registrations below (see <a href="#BCP90" id="rfc.xref.BCP90.1"><cite title="Registration Procedures for Message Header Fields">[BCP90]</cite></a>): |
|---|
| 970 | </p> |
|---|
| 971 | <div id="rfc.table.2"> |
|---|
| 972 | <div id="iana.header.registration.table"></div> |
|---|
| 973 | <table class="tt full left" cellpadding="3" cellspacing="0"> |
|---|
| 974 | <thead> |
|---|
| 975 | <tr> |
|---|
| 976 | <th>Header Field Name</th> |
|---|
| 977 | <th>Protocol</th> |
|---|
| 978 | <th>Status</th> |
|---|
| 979 | <th>Reference</th> |
|---|
| 980 | </tr> |
|---|
| 981 | </thead> |
|---|
| 982 | <tbody> |
|---|
| 983 | <tr> |
|---|
| 984 | <td class="left">Accept-Ranges</td> |
|---|
| 985 | <td class="left">http</td> |
|---|
| 986 | <td class="left">standard</td> |
|---|
| 987 | <td class="left"> <a href="#header.accept-ranges" id="rfc.xref.header.accept-ranges.1" title="Accept-Ranges">Section 5.1</a> |
|---|
| 988 | </td> |
|---|
| 989 | </tr> |
|---|
| 990 | <tr> |
|---|
| 991 | <td class="left">Content-Range</td> |
|---|
| 992 | <td class="left">http</td> |
|---|
| 993 | <td class="left">standard</td> |
|---|
| 994 | <td class="left"> <a href="#header.content-range" id="rfc.xref.header.content-range.4" title="Content-Range">Section 5.2</a> |
|---|
| 995 | </td> |
|---|
| 996 | </tr> |
|---|
| 997 | <tr> |
|---|
| 998 | <td class="left">If-Range</td> |
|---|
| 999 | <td class="left">http</td> |
|---|
| 1000 | <td class="left">standard</td> |
|---|
| 1001 | <td class="left"> <a href="#header.if-range" id="rfc.xref.header.if-range.4" title="If-Range">Section 5.3</a> |
|---|
| 1002 | </td> |
|---|
| 1003 | </tr> |
|---|
| 1004 | <tr> |
|---|
| 1005 | <td class="left">Range</td> |
|---|
| 1006 | <td class="left">http</td> |
|---|
| 1007 | <td class="left">standard</td> |
|---|
| 1008 | <td class="left"> <a href="#header.range" id="rfc.xref.header.range.5" title="Range">Section 5.4</a> |
|---|
| 1009 | </td> |
|---|
| 1010 | </tr> |
|---|
| 1011 | </tbody> |
|---|
| 1012 | </table> |
|---|
| 1013 | </div> |
|---|
| 1014 | <p id="rfc.section.6.2.p.2">The change controller is: "IETF (iesg@ietf.org) - Internet Engineering Task Force".</p> |
|---|
| 1015 | <h2 id="rfc.section.6.3"><a href="#rfc.section.6.3">6.3</a> <a id="range.specifier.registration" href="#range.specifier.registration">Range Specifier Registration</a></h2> |
|---|
| 1016 | <p id="rfc.section.6.3.p.1">The registration procedure for HTTP Range Specifiers is defined by <a href="#range.specifier.registry" title="Range Specifier Registry">Section 2.1</a> of this document. |
|---|
| 1017 | </p> |
|---|
| 1018 | <p id="rfc.section.6.3.p.2">The HTTP Range Specifier Registry shall be created at <<a href="http://www.iana.org/assignments/http-range-specifiers">http://www.iana.org/assignments/http-range-specifiers</a>> and be populated with the registrations below: |
|---|
| 1019 | </p> |
|---|
| 1020 | <div id="rfc.table.3"> |
|---|
| 1021 | <div id="iana.range.specifiers.table"></div> |
|---|
| 1022 | <table class="tt full left" cellpadding="3" cellspacing="0"> |
|---|
| 1023 | <thead> |
|---|
| 1024 | <tr> |
|---|
| 1025 | <th>Range Specifier Name</th> |
|---|
| 1026 | <th>Description</th> |
|---|
| 1027 | <th>Reference</th> |
|---|
| 1028 | </tr> |
|---|
| 1029 | </thead> |
|---|
| 1030 | <tbody> |
|---|
| 1031 | <tr> |
|---|
| 1032 | <td class="left">bytes</td> |
|---|
| 1033 | <td class="left">a range of octets</td> |
|---|
| 1034 | <td class="left"><a href="#range.units" title="Range Units">Section 2</a></td> |
|---|
| 1035 | </tr> |
|---|
| 1036 | <tr> |
|---|
| 1037 | <td class="left">none</td> |
|---|
| 1038 | <td class="left">reserved as keyword, indicating no ranges are supported</td> |
|---|
| 1039 | <td class="left"><a href="#header.accept-ranges" id="rfc.xref.header.accept-ranges.2" title="Accept-Ranges">Section 5.1</a></td> |
|---|
| 1040 | </tr> |
|---|
| 1041 | </tbody> |
|---|
| 1042 | </table> |
|---|
| 1043 | </div> |
|---|
| 1044 | <p id="rfc.section.6.3.p.3">The change controller is: "IETF (iesg@ietf.org) - Internet Engineering Task Force".</p> |
|---|
| 1045 | <h1 id="rfc.section.7"><a href="#rfc.section.7">7.</a> <a id="security.considerations" href="#security.considerations">Security Considerations</a></h1> |
|---|
| 1046 | <p id="rfc.section.7.p.1">This section is meant to inform application developers, information providers, and users of the security limitations in HTTP/1.1 |
|---|
| 1047 | as described by this document. The discussion does not include definitive solutions to the problems revealed, though it does |
|---|
| 1048 | make some suggestions for reducing security risks. |
|---|
| 1049 | </p> |
|---|
| 1050 | <h2 id="rfc.section.7.1"><a href="#rfc.section.7.1">7.1</a> <a id="overlapping.ranges" href="#overlapping.ranges">Overlapping Ranges</a></h2> |
|---|
| 1051 | <p id="rfc.section.7.1.p.1">Range requests containing overlapping ranges can lead to the situation where a server is sending far more data than the size |
|---|
| 1052 | of the complete resource representation. |
|---|
| 1053 | </p> |
|---|
| 1054 | <h1 id="rfc.section.8"><a href="#rfc.section.8">8.</a> <a id="acks" href="#acks">Acknowledgments</a></h1> |
|---|
| 1055 | <p id="rfc.section.8.p.1">See <a href="p1-messaging.html#acks" title="Acknowledgments">Section 9</a> of <a href="#Part1" id="rfc.xref.Part1.3"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing">[Part1]</cite></a>. |
|---|
| 1056 | </p> |
|---|
| 1057 | <h1 id="rfc.references"><a id="rfc.section.9" href="#rfc.section.9">9.</a> References |
|---|
| 1058 | </h1> |
|---|
| 1059 | <h2 id="rfc.references.1"><a href="#rfc.section.9.1" id="rfc.section.9.1">9.1</a> Normative References |
|---|
| 1060 | </h2> |
|---|
| 1061 | <table> |
|---|
| 1062 | <tr> |
|---|
| 1063 | <td class="reference"><b id="Part1">[Part1]</b></td> |
|---|
| 1064 | <td class="top"><a href="mailto:fielding@gbiv.com" title="Adobe Systems Incorporated">Fielding, R., Ed.</a> and <a href="mailto:julian.reschke@greenbytes.de" title="greenbytes GmbH">J. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p1-messaging-latest">Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing</a>”, Internet-Draft draft-ietf-httpbis-p1-messaging-latest (work in progress), December 2012. |
|---|
| 1065 | </td> |
|---|
| 1066 | </tr> |
|---|
| 1067 | <tr> |
|---|
| 1068 | <td class="reference"><b id="Part2">[Part2]</b></td> |
|---|
| 1069 | <td class="top"><a href="mailto:fielding@gbiv.com" title="Adobe Systems Incorporated">Fielding, R., Ed.</a> and <a href="mailto:julian.reschke@greenbytes.de" title="greenbytes GmbH">J. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p2-semantics-latest">Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</a>”, Internet-Draft draft-ietf-httpbis-p2-semantics-latest (work in progress), December 2012. |
|---|
| 1070 | </td> |
|---|
| 1071 | </tr> |
|---|
| 1072 | <tr> |
|---|
| 1073 | <td class="reference"><b id="Part4">[Part4]</b></td> |
|---|
| 1074 | <td class="top"><a href="mailto:fielding@gbiv.com" title="Adobe Systems Incorporated">Fielding, R., Ed.</a> and <a href="mailto:julian.reschke@greenbytes.de" title="greenbytes GmbH">J. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-latest">Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests</a>”, Internet-Draft draft-ietf-httpbis-p4-conditional-latest (work in progress), December 2012. |
|---|
| 1075 | </td> |
|---|
| 1076 | </tr> |
|---|
| 1077 | <tr> |
|---|
| 1078 | <td class="reference"><b id="Part6">[Part6]</b></td> |
|---|
| 1079 | <td class="top"><a href="mailto:fielding@gbiv.com" title="Adobe Systems Incorporated">Fielding, R., Ed.</a>, <a href="mailto:mnot@mnot.net" title="Akamai">Nottingham, M., Ed.</a>, and <a href="mailto:julian.reschke@greenbytes.de" title="greenbytes GmbH">J. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p6-cache-latest">Hypertext Transfer Protocol (HTTP/1.1): Caching</a>”, Internet-Draft draft-ietf-httpbis-p6-cache-latest (work in progress), December 2012. |
|---|
| 1080 | </td> |
|---|
| 1081 | </tr> |
|---|
| 1082 | <tr> |
|---|
| 1083 | <td class="reference"><b id="RFC2046">[RFC2046]</b></td> |
|---|
| 1084 | <td class="top"><a href="mailto:ned@innosoft.com" title="Innosoft International, Inc.">Freed, N.</a> and <a href="mailto:nsb@nsb.fv.com" title="First Virtual Holdings">N. Borenstein</a>, “<a href="http://tools.ietf.org/html/rfc2046">Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types</a>”, RFC 2046, November 1996. |
|---|
| 1085 | </td> |
|---|
| 1086 | </tr> |
|---|
| 1087 | <tr> |
|---|
| 1088 | <td class="reference"><b id="RFC2119">[RFC2119]</b></td> |
|---|
| 1089 | <td class="top"><a href="mailto:sob@harvard.edu" title="Harvard University">Bradner, S.</a>, “<a href="http://tools.ietf.org/html/rfc2119">Key words for use in RFCs to Indicate Requirement Levels</a>”, BCP 14, RFC 2119, March 1997. |
|---|
| 1090 | </td> |
|---|
| 1091 | </tr> |
|---|
| 1092 | <tr> |
|---|
| 1093 | <td class="reference"><b id="RFC5234">[RFC5234]</b></td> |
|---|
| 1094 | <td class="top"><a href="mailto:dcrocker@bbiw.net" title="Brandenburg InternetWorking">Crocker, D., Ed.</a> and <a href="mailto:paul.overell@thus.net" title="THUS plc.">P. Overell</a>, “<a href="http://tools.ietf.org/html/rfc5234">Augmented BNF for Syntax Specifications: ABNF</a>”, STD 68, RFC 5234, January 2008. |
|---|
| 1095 | </td> |
|---|
| 1096 | </tr> |
|---|
| 1097 | </table> |
|---|
| 1098 | <h2 id="rfc.references.2"><a href="#rfc.section.9.2" id="rfc.section.9.2">9.2</a> Informative References |
|---|
| 1099 | </h2> |
|---|
| 1100 | <table> |
|---|
| 1101 | <tr> |
|---|
| 1102 | <td class="reference"><b id="BCP13">[BCP13]</b></td> |
|---|
| 1103 | <td class="top"><a href="mailto:ned.freed@mrochek.com" title="Sun Microsystems">Freed, N.</a> and <a href="mailto:klensin+ietf@jck.com">J. Klensin</a>, “<a href="http://tools.ietf.org/html/rfc4288">Media Type Specifications and Registration Procedures</a>”, BCP 13, RFC 4288, December 2005. |
|---|
| 1104 | </td> |
|---|
| 1105 | </tr> |
|---|
| 1106 | <tr> |
|---|
| 1107 | <td class="reference"><b id="BCP90">[BCP90]</b></td> |
|---|
| 1108 | <td class="top"><a href="mailto:GK-IETF@ninebynine.org" title="Nine by Nine">Klyne, G.</a>, <a href="mailto:mnot@pobox.com" title="BEA Systems">Nottingham, M.</a>, and <a href="mailto:JeffMogul@acm.org" title="HP Labs">J. Mogul</a>, “<a href="http://tools.ietf.org/html/rfc3864">Registration Procedures for Message Header Fields</a>”, BCP 90, RFC 3864, September 2004. |
|---|
| 1109 | </td> |
|---|
| 1110 | </tr> |
|---|
| 1111 | <tr> |
|---|
| 1112 | <td class="reference"><b id="RFC2616">[RFC2616]</b></td> |
|---|
| 1113 | <td class="top"><a href="mailto:fielding@ics.uci.edu" title="University of California, Irvine">Fielding, R.</a>, <a href="mailto:jg@w3.org" title="W3C">Gettys, J.</a>, <a href="mailto:mogul@wrl.dec.com" title="Compaq Computer Corporation">Mogul, J.</a>, <a href="mailto:frystyk@w3.org" title="MIT Laboratory for Computer Science">Frystyk, H.</a>, <a href="mailto:masinter@parc.xerox.com" title="Xerox Corporation">Masinter, L.</a>, <a href="mailto:paulle@microsoft.com" title="Microsoft Corporation">Leach, P.</a>, and <a href="mailto:timbl@w3.org" title="W3C">T. Berners-Lee</a>, “<a href="http://tools.ietf.org/html/rfc2616">Hypertext Transfer Protocol -- HTTP/1.1</a>”, RFC 2616, June 1999. |
|---|
| 1114 | </td> |
|---|
| 1115 | </tr> |
|---|
| 1116 | <tr> |
|---|
| 1117 | <td class="reference"><b id="RFC5226">[RFC5226]</b></td> |
|---|
| 1118 | <td class="top"><a href="mailto:narten@us.ibm.com" title="IBM">Narten, T.</a> and <a href="mailto:Harald@Alvestrand.no" title="Google">H. Alvestrand</a>, “<a href="http://tools.ietf.org/html/rfc5226">Guidelines for Writing an IANA Considerations Section in RFCs</a>”, BCP 26, RFC 5226, May 2008. |
|---|
| 1119 | </td> |
|---|
| 1120 | </tr> |
|---|
| 1121 | </table> |
|---|
| 1122 | <div class="avoidbreak"> |
|---|
| 1123 | <h1 id="rfc.authors"><a href="#rfc.authors">Authors' Addresses</a></h1> |
|---|
| 1124 | <address class="vcard"><span class="vcardline"><span class="fn">Roy T. Fielding</span> |
|---|
| 1125 | (editor) |
|---|
| 1126 | <span class="n hidden"><span class="family-name">Fielding</span><span class="given-name">Roy T.</span></span></span><span class="org vcardline">Adobe Systems Incorporated</span><span class="adr"><span class="street-address vcardline">345 Park Ave</span><span class="vcardline"><span class="locality">San Jose</span>, <span class="region">CA</span> <span class="postal-code">95110</span></span><span class="country-name vcardline">USA</span></span><span class="vcardline">Email: <a href="mailto:fielding@gbiv.com"><span class="email">fielding@gbiv.com</span></a></span><span class="vcardline">URI: <a href="http://roy.gbiv.com/" class="url">http://roy.gbiv.com/</a></span></address> |
|---|
| 1127 | <address class="vcard"><span class="vcardline"><span class="fn">Yves Lafon</span> |
|---|
| 1128 | (editor) |
|---|
| 1129 | <span class="n hidden"><span class="family-name">Lafon</span><span class="given-name">Yves</span></span></span><span class="org vcardline">World Wide Web Consortium</span><span class="adr"><span class="street-address vcardline">W3C / ERCIM</span><span class="street-address vcardline">2004, rte des Lucioles</span><span class="vcardline"><span class="locality">Sophia-Antipolis</span>, <span class="region">AM</span> <span class="postal-code">06902</span></span><span class="country-name vcardline">France</span></span><span class="vcardline">Email: <a href="mailto:ylafon@w3.org"><span class="email">ylafon@w3.org</span></a></span><span class="vcardline">URI: <a href="http://www.raubacapeu.net/people/yves/" class="url">http://www.raubacapeu.net/people/yves/</a></span></address> |
|---|
| 1130 | <address class="vcard"><span class="vcardline"><span class="fn">Julian F. Reschke</span> |
|---|
| 1131 | (editor) |
|---|
| 1132 | <span class="n hidden"><span class="family-name">Reschke</span><span class="given-name">Julian F.</span></span></span><span class="org vcardline">greenbytes GmbH</span><span class="adr"><span class="street-address vcardline">Hafenweg 16</span><span class="vcardline"><span class="locality">Muenster</span>, <span class="region">NW</span> <span class="postal-code">48155</span></span><span class="country-name vcardline">Germany</span></span><span class="vcardline">Email: <a href="mailto:julian.reschke@greenbytes.de"><span class="email">julian.reschke@greenbytes.de</span></a></span><span class="vcardline">URI: <a href="http://greenbytes.de/tech/webdav/" class="url">http://greenbytes.de/tech/webdav/</a></span></address> |
|---|
| 1133 | </div> |
|---|
| 1134 | <div id="rfc.iref.m.1"></div> |
|---|
| 1135 | <div id="rfc.iref.m.2"></div> |
|---|
| 1136 | <h1 id="rfc.section.A" class="np"><a href="#rfc.section.A">A.</a> <a id="internet.media.type.multipart.byteranges" href="#internet.media.type.multipart.byteranges">Internet Media Type multipart/byteranges</a></h1> |
|---|
| 1137 | <p id="rfc.section.A.p.1">When an HTTP <a href="#status.206" class="smpl">206 (Partial Content)</a> response message includes the content of multiple ranges (a response to a request for multiple non-overlapping ranges), these |
|---|
| 1138 | are transmitted as a multipart message body (<a href="#RFC2046" id="rfc.xref.RFC2046.1"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types">[RFC2046]</cite></a>, <a href="http://tools.ietf.org/html/rfc2046#section-5.1">Section 5.1</a>). The media type for this purpose is called "multipart/byteranges". The following is to be registered with IANA <a href="#BCP13" id="rfc.xref.BCP13.1"><cite title="Media Type Specifications and Registration Procedures">[BCP13]</cite></a>. |
|---|
| 1139 | </p> |
|---|
| 1140 | <p id="rfc.section.A.p.2">The multipart/byteranges media type includes one or more parts, each with its own <a href="p2-semantics.html#header.content-type" class="smpl">Content-Type</a> and <a href="#header.content-range" class="smpl">Content-Range</a> fields. The required boundary parameter specifies the boundary string used to separate each body-part. |
|---|
| 1141 | </p> |
|---|
| 1142 | <p id="rfc.section.A.p.3"> </p> |
|---|
| 1143 | <dl> |
|---|
| 1144 | <dt>Type name:</dt> |
|---|
| 1145 | <dd>multipart</dd> |
|---|
| 1146 | <dt>Subtype name:</dt> |
|---|
| 1147 | <dd>byteranges</dd> |
|---|
| 1148 | <dt>Required parameters:</dt> |
|---|
| 1149 | <dd>boundary</dd> |
|---|
| 1150 | <dt>Optional parameters:</dt> |
|---|
| 1151 | <dd>none</dd> |
|---|
| 1152 | <dt>Encoding considerations:</dt> |
|---|
| 1153 | <dd>only "7bit", "8bit", or "binary" are permitted</dd> |
|---|
| 1154 | <dt>Security considerations:</dt> |
|---|
| 1155 | <dd>none</dd> |
|---|
| 1156 | <dt>Interoperability considerations:</dt> |
|---|
| 1157 | <dd>none</dd> |
|---|
| 1158 | <dt>Published specification:</dt> |
|---|
| 1159 | <dd>This specification (see <a href="#internet.media.type.multipart.byteranges" title="Internet Media Type multipart/byteranges">Appendix A</a>). |
|---|
| 1160 | </dd> |
|---|
| 1161 | <dt>Applications that use this media type:</dt> |
|---|
| 1162 | <dd>HTTP components supporting multiple ranges in a single request.</dd> |
|---|
| 1163 | <dt>Additional information:</dt> |
|---|
| 1164 | <dd> |
|---|
| 1165 | <dl> |
|---|
| 1166 | <dt>Magic number(s):</dt> |
|---|
| 1167 | <dd>none</dd> |
|---|
| 1168 | <dt>File extension(s):</dt> |
|---|
| 1169 | <dd>none</dd> |
|---|
| 1170 | <dt>Macintosh file type code(s):</dt> |
|---|
| 1171 | <dd>none</dd> |
|---|
| 1172 | </dl> |
|---|
| 1173 | </dd> |
|---|
| 1174 | <dt>Person and email address to contact for further information:</dt> |
|---|
| 1175 | <dd>See Authors Section.</dd> |
|---|
| 1176 | <dt>Intended usage:</dt> |
|---|
| 1177 | <dd>COMMON</dd> |
|---|
| 1178 | <dt>Restrictions on usage:</dt> |
|---|
| 1179 | <dd>none</dd> |
|---|
| 1180 | <dt>Author/Change controller:</dt> |
|---|
| 1181 | <dd>IESG</dd> |
|---|
| 1182 | </dl> |
|---|
| 1183 | <div class="note" id="rfc.section.A.p.4"> |
|---|
| 1184 | <p> <b>Note:</b> Despite the name "multipart/byteranges" is not limited to the byte ranges only. |
|---|
| 1185 | </p> |
|---|
| 1186 | </div> |
|---|
| 1187 | <div id="rfc.figure.u.22"></div> |
|---|
| 1188 | <p>For example:</p><pre class="text"> HTTP/1.1 206 Partial Content |
|---|
| 1189 | Date: Wed, 15 Nov 1995 06:25:24 GMT |
|---|
| 1190 | Last-Modified: Wed, 15 Nov 1995 04:58:08 GMT |
|---|
| 1191 | Content-type: multipart/byteranges; boundary=THIS_STRING_SEPARATES |
|---|
| 1192 | |
|---|
| 1193 | --THIS_STRING_SEPARATES |
|---|
| 1194 | Content-type: application/pdf |
|---|
| 1195 | Content-range: bytes 500-999/8000 |
|---|
| 1196 | |
|---|
| 1197 | ...the first range... |
|---|
| 1198 | --THIS_STRING_SEPARATES |
|---|
| 1199 | Content-type: application/pdf |
|---|
| 1200 | Content-range: bytes 7000-7999/8000 |
|---|
| 1201 | |
|---|
| 1202 | ...the second range |
|---|
| 1203 | --THIS_STRING_SEPARATES-- |
|---|
| 1204 | </pre><div id="rfc.figure.u.23"></div> |
|---|
| 1205 | <p>Another example, using the "exampleunit" range unit:</p> <pre class="text"> HTTP/1.1 206 Partial Content |
|---|
| 1206 | Date: Tue, 14 Nov 1995 06:25:24 GMT |
|---|
| 1207 | Last-Modified: Tue, 14 July 04:58:08 GMT |
|---|
| 1208 | Content-type: multipart/byteranges; boundary=THIS_STRING_SEPARATES |
|---|
| 1209 | |
|---|
| 1210 | --THIS_STRING_SEPARATES |
|---|
| 1211 | Content-type: video/example |
|---|
| 1212 | Content-range: exampleunit 1.2-4.3/25 |
|---|
| 1213 | |
|---|
| 1214 | ...the first range... |
|---|
| 1215 | --THIS_STRING_SEPARATES |
|---|
| 1216 | Content-type: video/example |
|---|
| 1217 | Content-range: exampleunit 11.2-14.3/25 |
|---|
| 1218 | |
|---|
| 1219 | ...the second range |
|---|
| 1220 | --THIS_STRING_SEPARATES-- |
|---|
| 1221 | </pre> <p id="rfc.section.A.p.7">Notes: </p> |
|---|
| 1222 | <ol> |
|---|
| 1223 | <li>Additional CRLFs <em class="bcp14">MAY</em> precede the first boundary string in the body. |
|---|
| 1224 | </li> |
|---|
| 1225 | <li>Although <a href="#RFC2046" id="rfc.xref.RFC2046.2"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types">[RFC2046]</cite></a> permits the boundary string to be quoted, some existing implementations handle a quoted boundary string incorrectly. |
|---|
| 1226 | </li> |
|---|
| 1227 | <li>A number of clients and servers were coded to an early draft of the byteranges specification to use a media type of multipart/x-byteranges<span id="rfc.iref.m.3"></span><span id="rfc.iref.m.4"></span>, which is almost, but not quite compatible with the version documented in HTTP/1.1. |
|---|
| 1228 | </li> |
|---|
| 1229 | </ol> |
|---|
| 1230 | <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a> <a id="changes.from.rfc.2616" href="#changes.from.rfc.2616">Changes from RFC 2616</a></h1> |
|---|
| 1231 | <p id="rfc.section.B.p.1">A weak validator cannot be used in a <a href="#status.206" class="smpl">206</a> response. (<a href="#status.206" id="rfc.xref.status.206.2" title="206 Partial Content">Section 3.1</a>) |
|---|
| 1232 | </p> |
|---|
| 1233 | <p id="rfc.section.B.p.2">The Content-Range header field only has meaning when the status code explicitly defines its use. (<a href="#header.content-range" id="rfc.xref.header.content-range.5" title="Content-Range">Section 5.2</a>) |
|---|
| 1234 | </p> |
|---|
| 1235 | <p id="rfc.section.B.p.3">Servers are given more leeway in what they return to a range request, in order to mitigate malicious (or just greedy) clients.</p> |
|---|
| 1236 | <p id="rfc.section.B.p.4">multipart/byteranges can consist of a single part. (<a href="#internet.media.type.multipart.byteranges" title="Internet Media Type multipart/byteranges">Appendix A</a>) |
|---|
| 1237 | </p> |
|---|
| 1238 | <p id="rfc.section.B.p.5">This specification introduces a Range Specifier Registry. (<a href="#range.specifier.registry" title="Range Specifier Registry">Section 2.1</a>) |
|---|
| 1239 | </p> |
|---|
| 1240 | <h1 id="rfc.section.C"><a href="#rfc.section.C">C.</a> <a id="imported.abnf" href="#imported.abnf">Imported ABNF</a></h1> |
|---|
| 1241 | <p id="rfc.section.C.p.1">The following core rules are included by reference, as defined in <a href="http://tools.ietf.org/html/rfc5234#appendix-B.1">Appendix B.1</a> of <a href="#RFC5234" id="rfc.xref.RFC5234.2"><cite title="Augmented BNF for Syntax Specifications: ABNF">[RFC5234]</cite></a>: ALPHA (letters), CR (carriage return), CRLF (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double quote), HEXDIG |
|---|
| 1242 | (hexadecimal 0-9/A-F/a-f), LF (line feed), OCTET (any 8-bit sequence of data), SP (space), and VCHAR (any visible US-ASCII |
|---|
| 1243 | character). |
|---|
| 1244 | </p> |
|---|
| 1245 | <p id="rfc.section.C.p.2">Note that all rules derived from <a href="#imported.abnf" class="smpl">token</a> are to be compared case-insensitively, like <a href="#range.units" class="smpl">range-unit</a> and <a href="#header.accept-ranges" class="smpl">acceptable-ranges</a>. |
|---|
| 1246 | </p> |
|---|
| 1247 | <p id="rfc.section.C.p.3">The rules below are defined in <a href="#Part1" id="rfc.xref.Part1.4"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing">[Part1]</cite></a>: |
|---|
| 1248 | </p> |
|---|
| 1249 | <div id="rfc.figure.u.24"></div><pre class="inline"> <a href="#imported.abnf" class="smpl">OWS</a> = <OWS, defined in <a href="#Part1" id="rfc.xref.Part1.5"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing">[Part1]</cite></a>, <a href="p1-messaging.html#whitespace" title="Whitespace">Section 3.2.3</a>> |
|---|
| 1250 | <a href="#imported.abnf" class="smpl">token</a> = <token, defined in <a href="#Part1" id="rfc.xref.Part1.6"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing">[Part1]</cite></a>, <a href="p1-messaging.html#field.components" title="Field value components">Section 3.2.6</a>> |
|---|
| 1251 | </pre><p id="rfc.section.C.p.5">The rules below are defined in other parts:</p> |
|---|
| 1252 | <div id="rfc.figure.u.25"></div><pre class="inline"> <a href="#imported.abnf" class="smpl">HTTP-date</a> = <HTTP-date, defined in <a href="#Part2" id="rfc.xref.Part2.1"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content">[Part2]</cite></a>, <a href="p2-semantics.html#http.date" title="Date/Time Formats">Section 8.1.1.1</a>> |
|---|
| 1253 | <a href="#imported.abnf" class="smpl">entity-tag</a> = <entity-tag, defined in <a href="#Part4" id="rfc.xref.Part4.5"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests">[Part4]</cite></a>, <a href="p4-conditional.html#header.etag" title="ETag">Section 2.3</a>> |
|---|
| 1254 | </pre><h1 id="rfc.section.D"><a href="#rfc.section.D">D.</a> <a id="collected.abnf" href="#collected.abnf">Collected ABNF</a></h1> |
|---|
| 1255 | <div id="rfc.figure.u.26"></div> <pre class="inline"><a href="#header.accept-ranges" class="smpl">Accept-Ranges</a> = acceptable-ranges |
|---|
| 1256 | |
|---|
| 1257 | <a href="#header.content-range" class="smpl">Content-Range</a> = byte-content-range-spec / other-content-range-spec |
|---|
| 1258 | |
|---|
| 1259 | <a href="#imported.abnf" class="smpl">HTTP-date</a> = <HTTP-date, defined in [Part2], Section 8.1.1.1> |
|---|
| 1260 | |
|---|
| 1261 | <a href="#header.if-range" class="smpl">If-Range</a> = entity-tag / HTTP-date |
|---|
| 1262 | |
|---|
| 1263 | <a href="#imported.abnf" class="smpl">OWS</a> = <OWS, defined in [Part1], Section 3.2.3> |
|---|
| 1264 | |
|---|
| 1265 | <a href="#range.retrieval.requests" class="smpl">Range</a> = byte-ranges-specifier / other-ranges-specifier |
|---|
| 1266 | |
|---|
| 1267 | <a href="#header.accept-ranges" class="smpl">acceptable-ranges</a> = ( *( "," OWS ) range-unit *( OWS "," [ OWS |
|---|
| 1268 | range-unit ] ) ) / "none" |
|---|
| 1269 | |
|---|
| 1270 | <a href="#header.content-range" class="smpl">byte-content-range-spec</a> = bytes-unit SP byte-range-resp-spec "/" ( |
|---|
| 1271 | instance-length / "*" ) |
|---|
| 1272 | <a href="#header.content-range" class="smpl">byte-range-resp-spec</a> = ( first-byte-pos "-" last-byte-pos ) / "*" |
|---|
| 1273 | <a href="#rule.ranges-specifier" class="smpl">byte-range-set</a> = *( "," OWS ) ( byte-range-spec / |
|---|
| 1274 | suffix-byte-range-spec ) *( OWS "," [ OWS ( byte-range-spec / |
|---|
| 1275 | suffix-byte-range-spec ) ] ) |
|---|
| 1276 | <a href="#rule.ranges-specifier" class="smpl">byte-range-spec</a> = first-byte-pos "-" [ last-byte-pos ] |
|---|
| 1277 | <a href="#rule.ranges-specifier" class="smpl">byte-ranges-specifier</a> = bytes-unit "=" byte-range-set |
|---|
| 1278 | <a href="#range.units" class="smpl">bytes-unit</a> = "bytes" |
|---|
| 1279 | |
|---|
| 1280 | <a href="#imported.abnf" class="smpl">entity-tag</a> = <entity-tag, defined in [Part4], Section 2.3> |
|---|
| 1281 | |
|---|
| 1282 | <a href="#rule.ranges-specifier" class="smpl">first-byte-pos</a> = 1*DIGIT |
|---|
| 1283 | |
|---|
| 1284 | <a href="#header.content-range" class="smpl">instance-length</a> = 1*DIGIT |
|---|
| 1285 | |
|---|
| 1286 | <a href="#rule.ranges-specifier" class="smpl">last-byte-pos</a> = 1*DIGIT |
|---|
| 1287 | |
|---|
| 1288 | <a href="#header.content-range" class="smpl">other-content-range-spec</a> = other-range-unit SP other-range-resp-spec |
|---|
| 1289 | <a href="#header.content-range" class="smpl">other-range-resp-spec</a> = *CHAR |
|---|
| 1290 | <a href="#range.retrieval.requests" class="smpl">other-range-set</a> = 1*CHAR |
|---|
| 1291 | <a href="#range.units" class="smpl">other-range-unit</a> = token |
|---|
| 1292 | <a href="#range.retrieval.requests" class="smpl">other-ranges-specifier</a> = other-range-unit "=" other-range-set |
|---|
| 1293 | |
|---|
| 1294 | <a href="#range.units" class="smpl">range-unit</a> = bytes-unit / other-range-unit |
|---|
| 1295 | |
|---|
| 1296 | <a href="#rule.ranges-specifier" class="smpl">suffix-byte-range-spec</a> = "-" suffix-length |
|---|
| 1297 | <a href="#rule.ranges-specifier" class="smpl">suffix-length</a> = 1*DIGIT |
|---|
| 1298 | |
|---|
| 1299 | <a href="#imported.abnf" class="smpl">token</a> = <token, defined in [Part1], Section 3.2.6> |
|---|
| 1300 | </pre> <h1 id="rfc.section.E"><a href="#rfc.section.E">E.</a> <a id="change.log" href="#change.log">Change Log (to be removed by RFC Editor before publication)</a></h1> |
|---|
| 1301 | <p id="rfc.section.E.p.1">Changes up to the first Working Group Last Call draft are summarized in <<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p5-range-19#appendix-D">http://tools.ietf.org/html/draft-ietf-httpbis-p5-range-19#appendix-D</a>>. |
|---|
| 1302 | </p> |
|---|
| 1303 | <h2 id="rfc.section.E.1"><a href="#rfc.section.E.1">E.1</a> <a id="changes.since.19" href="#changes.since.19">Since draft-ietf-httpbis-p5-range-19</a></h2> |
|---|
| 1304 | <p id="rfc.section.E.1.p.1">Closed issues: </p> |
|---|
| 1305 | <ul> |
|---|
| 1306 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/358">http://tools.ietf.org/wg/httpbis/trac/ticket/358</a>>: "ABNF list expansion code problem" |
|---|
| 1307 | </li> |
|---|
| 1308 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/361">http://tools.ietf.org/wg/httpbis/trac/ticket/361</a>>: "ABNF requirements for recipients" |
|---|
| 1309 | </li> |
|---|
| 1310 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/367">http://tools.ietf.org/wg/httpbis/trac/ticket/367</a>>: "reserve 'none' as byte range unit" |
|---|
| 1311 | </li> |
|---|
| 1312 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/368">http://tools.ietf.org/wg/httpbis/trac/ticket/368</a>>: "note introduction of new IANA registries as normative changes" |
|---|
| 1313 | </li> |
|---|
| 1314 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/369">http://tools.ietf.org/wg/httpbis/trac/ticket/369</a>>: "range units vs leading zeroes vs size" |
|---|
| 1315 | </li> |
|---|
| 1316 | </ul> |
|---|
| 1317 | <h2 id="rfc.section.E.2"><a href="#rfc.section.E.2">E.2</a> <a id="changes.since.20" href="#changes.since.20">Since draft-ietf-httpbis-p5-range-20</a></h2> |
|---|
| 1318 | <p id="rfc.section.E.2.p.1"> </p> |
|---|
| 1319 | <ul> |
|---|
| 1320 | <li>Conformance criteria and considerations regarding error handling are now defined in Part 1.</li> |
|---|
| 1321 | </ul> |
|---|
| 1322 | <h2 id="rfc.section.E.3"><a href="#rfc.section.E.3">E.3</a> <a id="changes.since.21" href="#changes.since.21">Since draft-ietf-httpbis-p5-range-21</a></h2> |
|---|
| 1323 | <p id="rfc.section.E.3.p.1">None yet.</p> |
|---|
| 1324 | <h1 id="rfc.index"><a href="#rfc.index">Index</a></h1> |
|---|
| 1325 | <p class="noprint"><a href="#rfc.index.2">2</a> <a href="#rfc.index.4">4</a> <a href="#rfc.index.A">A</a> <a href="#rfc.index.B">B</a> <a href="#rfc.index.C">C</a> <a href="#rfc.index.G">G</a> <a href="#rfc.index.I">I</a> <a href="#rfc.index.M">M</a> <a href="#rfc.index.P">P</a> <a href="#rfc.index.R">R</a> |
|---|
| 1326 | </p> |
|---|
| 1327 | <div class="print2col"> |
|---|
| 1328 | <ul class="ind"> |
|---|
| 1329 | <li><a id="rfc.index.2" href="#rfc.index.2"><b>2</b></a><ul> |
|---|
| 1330 | <li>206 Partial Content (status code) <a href="#rfc.iref.3"><b>3.1</b></a>, <a href="#rfc.xref.status.206.1">6.1</a>, <a href="#rfc.xref.status.206.2">B</a></li> |
|---|
| 1331 | </ul> |
|---|
| 1332 | </li> |
|---|
| 1333 | <li><a id="rfc.index.4" href="#rfc.index.4"><b>4</b></a><ul> |
|---|
| 1334 | <li>416 Requested Range Not Satisfiable (status code) <a href="#rfc.iref.3"><b>3.2</b></a>, <a href="#rfc.xref.status.416.1">6.1</a></li> |
|---|
| 1335 | </ul> |
|---|
| 1336 | </li> |
|---|
| 1337 | <li><a id="rfc.index.A" href="#rfc.index.A"><b>A</b></a><ul> |
|---|
| 1338 | <li>Accept-Ranges header field <a href="#rfc.iref.a.1"><b>5.1</b></a>, <a href="#rfc.xref.header.accept-ranges.1">6.2</a>, <a href="#rfc.xref.header.accept-ranges.2">6.3</a></li> |
|---|
| 1339 | </ul> |
|---|
| 1340 | </li> |
|---|
| 1341 | <li><a id="rfc.index.B" href="#rfc.index.B"><b>B</b></a><ul> |
|---|
| 1342 | <li><em>BCP13</em> <a href="#BCP13"><b>9.2</b></a>, <a href="#rfc.xref.BCP13.1">A</a></li> |
|---|
| 1343 | <li><em>BCP90</em> <a href="#rfc.xref.BCP90.1">6.2</a>, <a href="#BCP90"><b>9.2</b></a></li> |
|---|
| 1344 | </ul> |
|---|
| 1345 | </li> |
|---|
| 1346 | <li><a id="rfc.index.C" href="#rfc.index.C"><b>C</b></a><ul> |
|---|
| 1347 | <li>Content-Range header field <a href="#rfc.xref.header.content-range.1">2</a>, <a href="#rfc.xref.header.content-range.2">3.1</a>, <a href="#rfc.xref.header.content-range.3">3.2</a>, <a href="#rfc.iref.c.1"><b>5.2</b></a>, <a href="#rfc.xref.header.content-range.4">6.2</a>, <a href="#rfc.xref.header.content-range.5">B</a></li> |
|---|
| 1348 | </ul> |
|---|
| 1349 | </li> |
|---|
| 1350 | <li><a id="rfc.index.G" href="#rfc.index.G"><b>G</b></a><ul> |
|---|
| 1351 | <li><tt>Grammar</tt> |
|---|
| 1352 | <ul> |
|---|
| 1353 | <li><tt>Accept-Ranges</tt> <a href="#rfc.iref.g.4"><b>5.1</b></a></li> |
|---|
| 1354 | <li><tt>acceptable-ranges</tt> <a href="#rfc.iref.g.5"><b>5.1</b></a></li> |
|---|
| 1355 | <li><tt>byte-content-range-spec</tt> <a href="#rfc.iref.g.7"><b>5.2</b></a></li> |
|---|
| 1356 | <li><tt>byte-range-resp-spec</tt> <a href="#rfc.iref.g.8"><b>5.2</b></a></li> |
|---|
| 1357 | <li><tt>byte-range-set</tt> <a href="#rfc.iref.g.13"><b>5.4.1</b></a></li> |
|---|
| 1358 | <li><tt>byte-range-spec</tt> <a href="#rfc.iref.g.14"><b>5.4.1</b></a></li> |
|---|
| 1359 | <li><tt>byte-ranges-specifier</tt> <a href="#rfc.iref.g.12"><b>5.4.1</b></a></li> |
|---|
| 1360 | <li><tt>bytes-unit</tt> <a href="#rfc.iref.g.2"><b>2</b></a></li> |
|---|
| 1361 | <li><tt>Content-Range</tt> <a href="#rfc.iref.g.6"><b>5.2</b></a></li> |
|---|
| 1362 | <li><tt>first-byte-pos</tt> <a href="#rfc.iref.g.15"><b>5.4.1</b></a></li> |
|---|
| 1363 | <li><tt>If-Range</tt> <a href="#rfc.iref.g.10"><b>5.3</b></a></li> |
|---|
| 1364 | <li><tt>instance-length</tt> <a href="#rfc.iref.g.9"><b>5.2</b></a></li> |
|---|
| 1365 | <li><tt>last-byte-pos</tt> <a href="#rfc.iref.g.16"><b>5.4.1</b></a></li> |
|---|
| 1366 | <li><tt>other-range-unit</tt> <a href="#rfc.iref.g.3"><b>2</b></a></li> |
|---|
| 1367 | <li><tt>Range</tt> <a href="#rfc.iref.g.19"><b>5.4.2</b></a></li> |
|---|
| 1368 | <li><tt>range-unit</tt> <a href="#rfc.iref.g.1"><b>2</b></a></li> |
|---|
| 1369 | <li><tt>ranges-specifier</tt> <a href="#rfc.iref.g.11"><b>5.4.1</b></a></li> |
|---|
| 1370 | <li><tt>suffix-byte-range-spec</tt> <a href="#rfc.iref.g.17"><b>5.4.1</b></a></li> |
|---|
| 1371 | <li><tt>suffix-length</tt> <a href="#rfc.iref.g.18"><b>5.4.1</b></a></li> |
|---|
| 1372 | </ul> |
|---|
| 1373 | </li> |
|---|
| 1374 | </ul> |
|---|
| 1375 | </li> |
|---|
| 1376 | <li><a id="rfc.index.I" href="#rfc.index.I"><b>I</b></a><ul> |
|---|
| 1377 | <li>If-Range header field <a href="#rfc.xref.header.if-range.1">3.1</a>, <a href="#rfc.xref.header.if-range.2">3.2</a>, <a href="#rfc.iref.i.1"><b>5.3</b></a>, <a href="#rfc.xref.header.if-range.3">5.4.2</a>, <a href="#rfc.xref.header.if-range.4">6.2</a></li> |
|---|
| 1378 | </ul> |
|---|
| 1379 | </li> |
|---|
| 1380 | <li><a id="rfc.index.M" href="#rfc.index.M"><b>M</b></a><ul> |
|---|
| 1381 | <li>Media Type |
|---|
| 1382 | <ul> |
|---|
| 1383 | <li>multipart/byteranges <a href="#rfc.iref.m.1"><b>A</b></a></li> |
|---|
| 1384 | <li>multipart/x-byteranges <a href="#rfc.iref.m.4">A</a></li> |
|---|
| 1385 | </ul> |
|---|
| 1386 | </li> |
|---|
| 1387 | <li>multipart/byteranges Media Type <a href="#rfc.iref.m.2"><b>A</b></a></li> |
|---|
| 1388 | <li>multipart/x-byteranges Media Type <a href="#rfc.iref.m.3">A</a></li> |
|---|
| 1389 | </ul> |
|---|
| 1390 | </li> |
|---|
| 1391 | <li><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul> |
|---|
| 1392 | <li><em>Part1</em> <a href="#rfc.xref.Part1.1">1.1</a>, <a href="#rfc.xref.Part1.2">1.2</a>, <a href="#rfc.xref.Part1.3">8</a>, <a href="#Part1"><b>9.1</b></a>, <a href="#rfc.xref.Part1.4">C</a>, <a href="#rfc.xref.Part1.5">C</a>, <a href="#rfc.xref.Part1.6">C</a><ul> |
|---|
| 1393 | <li><em>Section 1.2</em> <a href="#rfc.xref.Part1.2">1.2</a></li> |
|---|
| 1394 | <li><em>Section 2.5</em> <a href="#rfc.xref.Part1.1">1.1</a></li> |
|---|
| 1395 | <li><em>Section 3.2.3</em> <a href="#rfc.xref.Part1.5">C</a></li> |
|---|
| 1396 | <li><em>Section 3.2.6</em> <a href="#rfc.xref.Part1.6">C</a></li> |
|---|
| 1397 | <li><em>Section 9</em> <a href="#rfc.xref.Part1.3">8</a></li> |
|---|
| 1398 | </ul> |
|---|
| 1399 | </li> |
|---|
| 1400 | <li><em>Part2</em> <a href="#Part2"><b>9.1</b></a>, <a href="#rfc.xref.Part2.1">C</a><ul> |
|---|
| 1401 | <li><em>Section 8.1.1.1</em> <a href="#rfc.xref.Part2.1">C</a></li> |
|---|
| 1402 | </ul> |
|---|
| 1403 | </li> |
|---|
| 1404 | <li><em>Part4</em> <a href="#rfc.xref.Part4.1">4.2</a>, <a href="#rfc.xref.Part4.2">4.2</a>, <a href="#rfc.xref.Part4.3">5.3</a>, <a href="#rfc.xref.Part4.4">5.3</a>, <a href="#Part4"><b>9.1</b></a>, <a href="#rfc.xref.Part4.5">C</a><ul> |
|---|
| 1405 | <li><em>Section 2.2.2</em> <a href="#rfc.xref.Part4.2">4.2</a>, <a href="#rfc.xref.Part4.3">5.3</a>, <a href="#rfc.xref.Part4.4">5.3</a></li> |
|---|
| 1406 | <li><em>Section 2.3</em> <a href="#rfc.xref.Part4.1">4.2</a>, <a href="#rfc.xref.Part4.5">C</a></li> |
|---|
| 1407 | </ul> |
|---|
| 1408 | </li> |
|---|
| 1409 | <li><em>Part6</em> <a href="#rfc.xref.Part6.1">3.1</a>, <a href="#Part6"><b>9.1</b></a><ul> |
|---|
| 1410 | <li><em>Section 4.1.2</em> <a href="#rfc.xref.Part6.1">3.1</a></li> |
|---|
| 1411 | </ul> |
|---|
| 1412 | </li> |
|---|
| 1413 | </ul> |
|---|
| 1414 | </li> |
|---|
| 1415 | <li><a id="rfc.index.R" href="#rfc.index.R"><b>R</b></a><ul> |
|---|
| 1416 | <li>Range header field <a href="#rfc.xref.header.range.1">2</a>, <a href="#rfc.xref.header.range.2">2</a>, <a href="#rfc.xref.header.range.3">3.1</a>, <a href="#rfc.xref.header.range.4">3.2</a>, <a href="#rfc.iref.r.1"><b>5.4</b></a>, <a href="#rfc.xref.header.range.5">6.2</a></li> |
|---|
| 1417 | <li><em>RFC2046</em> <a href="#RFC2046"><b>9.1</b></a>, <a href="#rfc.xref.RFC2046.1">A</a>, <a href="#rfc.xref.RFC2046.2">A</a><ul> |
|---|
| 1418 | <li><em>Section 5.1</em> <a href="#rfc.xref.RFC2046.1">A</a></li> |
|---|
| 1419 | </ul> |
|---|
| 1420 | </li> |
|---|
| 1421 | <li><em>RFC2119</em> <a href="#rfc.xref.RFC2119.1">1.1</a>, <a href="#RFC2119"><b>9.1</b></a></li> |
|---|
| 1422 | <li><em>RFC2616</em> <a href="#RFC2616"><b>9.2</b></a></li> |
|---|
| 1423 | <li><em>RFC5226</em> <a href="#rfc.xref.RFC5226.1">2.1</a>, <a href="#RFC5226"><b>9.2</b></a><ul> |
|---|
| 1424 | <li><em>Section 4.1</em> <a href="#rfc.xref.RFC5226.1">2.1</a></li> |
|---|
| 1425 | </ul> |
|---|
| 1426 | </li> |
|---|
| 1427 | <li><em>RFC5234</em> <a href="#rfc.xref.RFC5234.1">1.2</a>, <a href="#RFC5234"><b>9.1</b></a>, <a href="#rfc.xref.RFC5234.2">C</a><ul> |
|---|
| 1428 | <li><em>Appendix B.1</em> <a href="#rfc.xref.RFC5234.2">C</a></li> |
|---|
| 1429 | </ul> |
|---|
| 1430 | </li> |
|---|
| 1431 | </ul> |
|---|
| 1432 | </li> |
|---|
| 1433 | </ul> |
|---|
| 1434 | </div> |
|---|
| 1435 | </body> |
|---|
| 1436 | </html> |
|---|
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