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| 297 | background-color: yellow; |
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| 298 | } |
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| 299 | |
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| 300 | |
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| 301 | @media print { |
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| 302 | .noprint { |
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| 303 | display: none; |
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| 304 | } |
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| 305 | |
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| 306 | a { |
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| 307 | color: black; |
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| 310 | |
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| 312 | width: 90%; |
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| 314 | |
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| 320 | font-size: 12pt; |
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| 322 | |
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| 326 | |
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| [52] | 328 | content: target-counter(attr(href), page); |
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| 329 | } |
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| 330 | |
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| 331 | .print2col { |
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| 333 | -moz-column-count: 2; |
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| 334 | column-fill: auto; |
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| 335 | } |
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| 336 | } |
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| 337 | |
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| 338 | @page { |
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| 339 | @top-left { |
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| [1099] | 340 | content: "Internet-Draft"; |
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| [52] | 341 | } |
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| 342 | @top-right { |
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| [331] | 343 | content: "November 2008"; |
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| [52] | 344 | } |
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| 345 | @top-center { |
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| [120] | 346 | content: "HTTP/1.1, Part 5"; |
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| [52] | 347 | } |
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| 348 | @bottom-left { |
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| 349 | content: "Fielding, et al."; |
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| 350 | } |
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| 351 | @bottom-center { |
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| 352 | content: "Standards Track"; |
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| 353 | } |
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| 354 | @bottom-right { |
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| 355 | content: "[Page " counter(page) "]"; |
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| 356 | } |
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| 357 | } |
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| 358 | |
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| 359 | @page:first { |
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| 360 | @top-left { |
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| 361 | content: normal; |
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| 362 | } |
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| 363 | @top-right { |
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| 364 | content: normal; |
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| 365 | } |
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| 366 | @top-center { |
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| 367 | content: normal; |
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| 368 | } |
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| 369 | } |
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| 370 | </style><link rel="Contents" href="#rfc.toc"> |
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| 371 | <link rel="Author" href="#rfc.authors"> |
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| 372 | <link rel="Copyright" href="#rfc.copyright"> |
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| 373 | <link rel="Index" href="#rfc.index"> |
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| 374 | <link rel="Chapter" title="1 Introduction" href="#rfc.section.1"> |
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| [205] | 375 | <link rel="Chapter" title="2 Notational Conventions and Generic Grammar" href="#rfc.section.2"> |
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| 376 | <link rel="Chapter" title="3 Range Units" href="#rfc.section.3"> |
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| 377 | <link rel="Chapter" title="4 Status Code Definitions" href="#rfc.section.4"> |
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| 378 | <link rel="Chapter" title="5 Combining Byte Ranges" href="#rfc.section.5"> |
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| 379 | <link rel="Chapter" title="6 Header Field Definitions" href="#rfc.section.6"> |
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| 380 | <link rel="Chapter" title="7 IANA Considerations" href="#rfc.section.7"> |
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| 381 | <link rel="Chapter" title="8 Security Considerations" href="#rfc.section.8"> |
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| 382 | <link rel="Chapter" title="9 Acknowledgments" href="#rfc.section.9"> |
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| 383 | <link rel="Chapter" href="#rfc.section.10" title="10 References"> |
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| [52] | 384 | <link rel="Appendix" title="A Internet Media Type multipart/byteranges" href="#rfc.section.A"> |
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| [99] | 385 | <link rel="Appendix" title="B Compatibility with Previous Versions" href="#rfc.section.B"> |
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| [115] | 386 | <link rel="Appendix" title="C Change Log (to be removed by RFC Editor before publication)" href="#rfc.section.C"> |
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| [1099] | 387 | <meta name="generator" content="http://greenbytes.de/tech/webdav/rfc2629.xslt, Revision 1.537, 2010-12-30 14:21:59, XSLT vendor: SAXON 8.9 from Saxonica http://www.saxonica.com/"> |
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| 388 | <link rel="schema.dct" href="http://purl.org/dc/terms/"> |
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| 389 | <meta name="dct.creator" content="Fielding, R."> |
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| 390 | <meta name="dct.creator" content="Gettys, J."> |
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| 391 | <meta name="dct.creator" content="Mogul, J."> |
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| 392 | <meta name="dct.creator" content="Frystyk, H."> |
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| 393 | <meta name="dct.creator" content="Masinter, L."> |
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| 394 | <meta name="dct.creator" content="Leach, P."> |
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| 395 | <meta name="dct.creator" content="Berners-Lee, T."> |
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| 396 | <meta name="dct.creator" content="Lafon, Y."> |
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| 397 | <meta name="dct.creator" content="Reschke, J. F."> |
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| 398 | <meta name="dct.identifier" content="urn:ietf:id:draft-ietf-httpbis-p5-range-05"> |
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| 399 | <meta name="dct.issued" scheme="ISO8601" content="2008-11-16"> |
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| 400 | <meta name="dct.replaces" content="urn:ietf:rfc:2616"> |
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| 401 | <meta name="dct.abstract" content="The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information systems. HTTP has been in use by the World Wide Web global information initiative since 1990. This document is Part 5 of the seven-part specification that defines the protocol referred to as "HTTP/1.1" and, taken together, obsoletes RFC 2616. Part 5 defines range-specific requests and the rules for constructing and combining responses to those requests."> |
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| 402 | <meta name="description" content="The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information systems. HTTP has been in use by the World Wide Web global information initiative since 1990. This document is Part 5 of the seven-part specification that defines the protocol referred to as "HTTP/1.1" and, taken together, obsoletes RFC 2616. Part 5 defines range-specific requests and the rules for constructing and combining responses to those requests."> |
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| [52] | 403 | </head> |
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| 404 | <body> |
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| [1099] | 405 | <table class="header"> |
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| 406 | <tbody> |
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| 407 | <tr> |
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| 408 | <td class="left">Network Working Group</td> |
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| 409 | <td class="right">R. Fielding, Editor</td> |
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| 410 | </tr> |
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| 411 | <tr> |
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| 412 | <td class="left">Internet-Draft</td> |
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| 413 | <td class="right">Day Software</td> |
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| 414 | </tr> |
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| 415 | <tr> |
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| 416 | <td class="left">Obsoletes: <a href="http://tools.ietf.org/html/rfc2616">2616</a> (if approved) |
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| 417 | </td> |
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| 418 | <td class="right">J. Gettys</td> |
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| 419 | </tr> |
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| 420 | <tr> |
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| 421 | <td class="left">Intended status: Standards Track</td> |
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| 422 | <td class="right">One Laptop per Child</td> |
|---|
| 423 | </tr> |
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| 424 | <tr> |
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| 425 | <td class="left">Expires: May 20, 2009</td> |
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| 426 | <td class="right">J. Mogul</td> |
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| 427 | </tr> |
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| 428 | <tr> |
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| 429 | <td class="left"></td> |
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| 430 | <td class="right">HP</td> |
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| 431 | </tr> |
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| 432 | <tr> |
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| 433 | <td class="left"></td> |
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| 434 | <td class="right">H. Frystyk</td> |
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| 435 | </tr> |
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| 436 | <tr> |
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| 437 | <td class="left"></td> |
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| 438 | <td class="right">Microsoft</td> |
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| 439 | </tr> |
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| 440 | <tr> |
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| 441 | <td class="left"></td> |
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| 442 | <td class="right">L. Masinter</td> |
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| 443 | </tr> |
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| 444 | <tr> |
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| 445 | <td class="left"></td> |
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| 446 | <td class="right">Adobe Systems</td> |
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| 447 | </tr> |
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| 448 | <tr> |
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| 449 | <td class="left"></td> |
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| 450 | <td class="right">P. Leach</td> |
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| 451 | </tr> |
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| 452 | <tr> |
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| 453 | <td class="left"></td> |
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| 454 | <td class="right">Microsoft</td> |
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| 455 | </tr> |
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| 456 | <tr> |
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| 457 | <td class="left"></td> |
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| 458 | <td class="right">T. Berners-Lee</td> |
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| 459 | </tr> |
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| 460 | <tr> |
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| 461 | <td class="left"></td> |
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| 462 | <td class="right">W3C/MIT</td> |
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| 463 | </tr> |
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| 464 | <tr> |
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| 465 | <td class="left"></td> |
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| 466 | <td class="right">Y. Lafon, Editor</td> |
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| 467 | </tr> |
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| 468 | <tr> |
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| 469 | <td class="left"></td> |
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| 470 | <td class="right">W3C</td> |
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| 471 | </tr> |
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| 472 | <tr> |
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| 473 | <td class="left"></td> |
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| 474 | <td class="right">J. Reschke, Editor</td> |
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| 475 | </tr> |
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| 476 | <tr> |
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| 477 | <td class="left"></td> |
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| 478 | <td class="right">greenbytes</td> |
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| 479 | </tr> |
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| 480 | <tr> |
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| 481 | <td class="left"></td> |
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| 482 | <td class="right">November 16, 2008</td> |
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| 483 | </tr> |
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| 484 | </tbody> |
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| [52] | 485 | </table> |
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| [381] | 486 | <p class="title">HTTP/1.1, part 5: Range Requests and Partial Responses<br><span class="filename">draft-ietf-httpbis-p5-range-05</span></p> |
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| [52] | 487 | <h1><a id="rfc.status" href="#rfc.status">Status of this Memo</a></h1> |
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| 488 | <p>By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she |
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| 489 | is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section |
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| 490 | 6 of BCP 79. |
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| 491 | </p> |
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| 492 | <p>Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note |
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| 493 | that other groups may also distribute working documents as Internet-Drafts. |
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| 494 | </p> |
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| 495 | <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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| 496 | 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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| 497 | in progress”. |
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| 498 | </p> |
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| [1099] | 499 | <p>The list of current Internet-Drafts can be accessed at <a href="http://www.ietf.org/ietf/1id-abstracts.txt">http://www.ietf.org/ietf/1id-abstracts.txt</a>. |
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| [52] | 500 | </p> |
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| [1099] | 501 | <p>The list of Internet-Draft Shadow Directories can be accessed at <a href="http://www.ietf.org/shadow.html">http://www.ietf.org/shadow.html</a>. |
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| [52] | 502 | </p> |
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| [1099] | 503 | <p>This Internet-Draft will expire on May 20, 2009.</p> |
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| [52] | 504 | <h1 id="rfc.abstract"><a href="#rfc.abstract">Abstract</a></h1> |
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| 505 | <p>The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information |
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| 506 | systems. HTTP has been in use by the World Wide Web global information initiative since 1990. This document is Part 5 of the |
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| 507 | seven-part specification that defines the protocol referred to as "HTTP/1.1" and, taken together, obsoletes RFC 2616. Part |
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| 508 | 5 defines range-specific requests and the rules for constructing and combining responses to those requests. |
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| 509 | </p> |
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| 510 | <h1 id="rfc.note.1"><a href="#rfc.note.1">Editorial Note (To be removed by RFC Editor)</a></h1> |
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| 511 | <p>Discussion of this draft should take place on the HTTPBIS working group mailing list (ietf-http-wg@w3.org). The current issues |
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| [324] | 512 | list is at <<a href="http://tools.ietf.org/wg/httpbis/trac/report/11">http://tools.ietf.org/wg/httpbis/trac/report/11</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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| [153] | 513 | </p> |
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| [345] | 514 | <p>The changes in this draft are summarized in <a href="#changes.since.04" title="Since draft-ietf-httpbis-p5-range-04">Appendix C.6</a>. |
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| [52] | 515 | </p> |
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| 516 | <hr class="noprint"> |
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| 517 | <h1 class="np" id="rfc.toc"><a href="#rfc.toc">Table of Contents</a></h1> |
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| 518 | <ul class="toc"> |
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| [1099] | 519 | <li>1. <a href="#introduction">Introduction</a><ul> |
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| 520 | <li>1.1 <a href="#intro.requirements">Requirements</a></li> |
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| [96] | 521 | </ul> |
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| 522 | </li> |
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| [1099] | 523 | <li>2. <a href="#notation">Notational Conventions and Generic Grammar</a></li> |
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| 524 | <li>3. <a href="#range.units">Range Units</a></li> |
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| 525 | <li>4. <a href="#rfc.section.4">Status Code Definitions</a><ul> |
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| 526 | <li>4.1 <a href="#status.206">206 Partial Content</a></li> |
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| 527 | <li>4.2 <a href="#status.416">416 Requested Range Not Satisfiable</a></li> |
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| [52] | 528 | </ul> |
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| 529 | </li> |
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| [1099] | 530 | <li>5. <a href="#combining.byte.ranges">Combining Byte Ranges</a></li> |
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| 531 | <li>6. <a href="#header.fields">Header Field Definitions</a><ul> |
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| 532 | <li>6.1 <a href="#header.accept-ranges">Accept-Ranges</a></li> |
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| 533 | <li>6.2 <a href="#header.content-range">Content-Range</a></li> |
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| 534 | <li>6.3 <a href="#header.if-range">If-Range</a></li> |
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| 535 | <li>6.4 <a href="#header.range">Range</a><ul> |
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| 536 | <li>6.4.1 <a href="#byte.ranges">Byte Ranges</a></li> |
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| 537 | <li>6.4.2 <a href="#range.retrieval.requests">Range Retrieval Requests</a></li> |
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| [52] | 538 | </ul> |
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| 539 | </li> |
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| 540 | </ul> |
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| 541 | </li> |
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| [1099] | 542 | <li>7. <a href="#IANA.considerations">IANA Considerations</a><ul> |
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| 543 | <li>7.1 <a href="#message.header.registration">Message Header Registration</a></li> |
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| [253] | 544 | </ul> |
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| 545 | </li> |
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| [1099] | 546 | <li>8. <a href="#security.considerations">Security Considerations</a></li> |
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| 547 | <li>9. <a href="#ack">Acknowledgments</a></li> |
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| 548 | <li>10. <a href="#rfc.references">References</a><ul> |
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| 549 | <li>10.1 <a href="#rfc.references.1">Normative References</a></li> |
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| 550 | <li>10.2 <a href="#rfc.references.2">Informative References</a></li> |
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| [119] | 551 | </ul> |
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| 552 | </li> |
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| [1099] | 553 | <li><a href="#rfc.authors">Authors' Addresses</a></li> |
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| 554 | <li>A. <a href="#internet.media.type.multipart.byteranges">Internet Media Type multipart/byteranges</a></li> |
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| 555 | <li>B. <a href="#compatibility">Compatibility with Previous Versions</a><ul> |
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| 556 | <li>B.1 <a href="#changes.from.rfc.2068">Changes from RFC 2068</a></li> |
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| 557 | <li>B.2 <a href="#changes.from.rfc.2616">Changes from RFC 2616</a></li> |
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| [99] | 558 | </ul> |
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| 559 | </li> |
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| [1099] | 560 | <li>C. <a href="#change.log">Change Log (to be removed by RFC Editor before publication)</a><ul> |
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| 561 | <li>C.1 <a href="#rfc.section.C.1">Since RFC2616</a></li> |
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| 562 | <li>C.2 <a href="#rfc.section.C.2">Since draft-ietf-httpbis-p5-range-00</a></li> |
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| 563 | <li>C.3 <a href="#rfc.section.C.3">Since draft-ietf-httpbis-p5-range-01</a></li> |
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| 564 | <li>C.4 <a href="#changes.since.02">Since draft-ietf-httpbis-p5-range-02</a></li> |
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| 565 | <li>C.5 <a href="#changes.since.03">Since draft-ietf-httpbis-p5-range-03</a></li> |
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| 566 | <li>C.6 <a href="#changes.since.04">Since draft-ietf-httpbis-p5-range-04</a></li> |
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| [115] | 567 | </ul> |
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| 568 | </li> |
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| [1099] | 569 | <li><a href="#rfc.index">Index</a></li> |
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| 570 | <li><a href="#rfc.ipr">Intellectual Property and Copyright Statements</a></li> |
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| [52] | 571 | </ul> |
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| 572 | <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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| [158] | 573 | <p id="rfc.section.1.p.1">HTTP clients often encounter interrupted data transfers as a result of cancelled requests or dropped connections. When a cache |
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| 574 | has stored a partial representation, it is desirable to request the remainder of that representation in a subsequent request |
|---|
| 575 | rather than transfer the entire representation. There are also a number of Web applications that benefit from being able to |
|---|
| 576 | request only a subset of a larger representation, such as a single page of a very large document or only part of an image |
|---|
| 577 | to be rendered by a device with limited local storage. |
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| [52] | 578 | </p> |
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| [163] | 579 | <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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| 580 | 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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| 581 | request without impacting interoperability. Partial responses are indicated by a distinct status code to not be mistaken for |
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| 582 | full responses by intermediate caches that might not implement the feature. |
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| [158] | 583 | </p> |
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| [163] | 584 | <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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| [158] | 585 | requests for byte ranges. |
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| 586 | </p> |
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| [96] | 587 | <h2 id="rfc.section.1.1"><a href="#rfc.section.1.1">1.1</a> <a id="intro.requirements" href="#intro.requirements">Requirements</a></h2> |
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| 588 | <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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| 589 | 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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| 590 | </p> |
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| 591 | <p id="rfc.section.1.1.p.2">An implementation is not compliant if it fails to satisfy one or more of the <em class="bcp14">MUST</em> or <em class="bcp14">REQUIRED</em> level requirements for the protocols it implements. An implementation that satisfies all the <em class="bcp14">MUST</em> or <em class="bcp14">REQUIRED</em> level and all the <em class="bcp14">SHOULD</em> level requirements for its protocols is said to be "unconditionally compliant"; one that satisfies all the <em class="bcp14">MUST</em> level requirements but not all the <em class="bcp14">SHOULD</em> level requirements for its protocols is said to be "conditionally compliant." |
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| 592 | </p> |
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| [205] | 593 | <h1 id="rfc.section.2"><a href="#rfc.section.2">2.</a> <a id="notation" href="#notation">Notational Conventions and Generic Grammar</a></h1> |
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| [377] | 594 | <p id="rfc.section.2.p.1">This specification uses the ABNF syntax defined in <a href="p1-messaging.html#notation.abnf" title="ABNF Extension: #rule">Section 2.1</a> of <a href="#Part1" id="rfc.xref.Part1.1"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> and the core rules defined in <a href="p1-messaging.html#basic.rules" title="Basic Rules">Section 2.2</a> of <a href="#Part1" id="rfc.xref.Part1.2"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>: |
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| [52] | 595 | </p> |
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| [229] | 596 | <div id="rfc.figure.u.1"></div><pre class="inline"> <a href="#notation" class="smpl">DIGIT</a> = <DIGIT, defined in <a href="#Part1" id="rfc.xref.Part1.3"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#basic.rules" title="Basic Rules">Section 2.2</a>> |
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| 597 | <a href="#notation" class="smpl">SP</a> = <SP, defined in <a href="#Part1" id="rfc.xref.Part1.4"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#basic.rules" title="Basic Rules">Section 2.2</a>> |
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| 598 | </pre><div id="rfc.figure.u.2"></div><pre class="inline"> <a href="#notation" class="smpl">token</a> = <token, defined in <a href="#Part1" id="rfc.xref.Part1.5"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#basic.rules" title="Basic Rules">Section 2.2</a>> |
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| [371] | 599 | <a href="#notation" class="smpl">OWS</a> = <OWS, defined in <a href="#Part1" id="rfc.xref.Part1.6"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#basic.rules" title="Basic Rules">Section 2.2</a>> |
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| [207] | 600 | </pre><div id="abnf.dependencies"> |
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| [229] | 601 | <p id="rfc.section.2.p.4"> The ABNF rules below are defined in other parts:</p> |
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| [207] | 602 | </div> |
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| [371] | 603 | <div id="rfc.figure.u.3"></div><pre class="inline"> <a href="#abnf.dependencies" class="smpl">HTTP-date</a> = <HTTP-date, defined in <a href="#Part1" id="rfc.xref.Part1.7"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#full.date" title="Full Date">Section 3.3.1</a>> |
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| [229] | 604 | </pre><div id="rfc.figure.u.4"></div><pre class="inline"> <a href="#abnf.dependencies" class="smpl">entity-tag</a> = <entity-tag, defined in <a href="#Part4" id="rfc.xref.Part4.1"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>, <a href="p4-conditional.html#entity.tags" title="Entity Tags">Section 3</a>> |
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| [205] | 605 | </pre><h1 id="rfc.section.3"><a href="#rfc.section.3">3.</a> <a id="range.units" href="#range.units">Range Units</a></h1> |
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| 606 | <p id="rfc.section.3.p.1">HTTP/1.1 allows a client to request that only part (a range of) the response entity be included within the response. HTTP/1.1 |
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| 607 | uses range units in the Range (<a href="#header.range" id="rfc.xref.header.range.1" title="Range">Section 6.4</a>) and Content-Range (<a href="#header.content-range" id="rfc.xref.header.content-range.1" title="Content-Range">Section 6.2</a>) header fields. An entity can be broken down into subranges according to various structural units. |
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| 608 | </p> |
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| [334] | 609 | <div id="rfc.figure.u.5"></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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| [229] | 610 | <a href="#range.units" class="smpl">bytes-unit</a> = "bytes" |
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| 611 | <a href="#range.units" class="smpl">other-range-unit</a> = <a href="#notation" class="smpl">token</a> |
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| [205] | 612 | </pre><p id="rfc.section.3.p.3">The only range unit defined by HTTP/1.1 is "bytes". HTTP/1.1 implementations <em class="bcp14">MAY</em> ignore ranges specified using other units. |
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| [52] | 613 | </p> |
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| [205] | 614 | <p id="rfc.section.3.p.4">HTTP/1.1 has been designed to allow implementations of applications that do not depend on knowledge of ranges.</p> |
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| 615 | <h1 id="rfc.section.4"><a href="#rfc.section.4">4.</a> Status Code Definitions |
|---|
| [52] | 616 | </h1> |
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| 617 | <div id="rfc.iref.3"></div> |
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| 618 | <div id="rfc.iref.s.1"></div> |
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| [205] | 619 | <h2 id="rfc.section.4.1"><a href="#rfc.section.4.1">4.1</a> <a id="status.206" href="#status.206">206 Partial Content</a></h2> |
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| 620 | <p id="rfc.section.4.1.p.1">The server has fulfilled the partial GET request for the resource. The request <em class="bcp14">MUST</em> have included a Range header field (<a href="#header.range" id="rfc.xref.header.range.2" title="Range">Section 6.4</a>) indicating the desired range, and <em class="bcp14">MAY</em> have included an If-Range header field (<a href="#header.if-range" id="rfc.xref.header.if-range.1" title="If-Range">Section 6.3</a>) to make the request conditional. |
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| [52] | 621 | </p> |
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| [205] | 622 | <p id="rfc.section.4.1.p.2">The response <em class="bcp14">MUST</em> include the following header fields: |
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| [52] | 623 | </p> |
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| 624 | <ul> |
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| [205] | 625 | <li>Either a Content-Range header field (<a href="#header.content-range" id="rfc.xref.header.content-range.2" title="Content-Range">Section 6.2</a>) indicating the range included with this response, or a multipart/byteranges Content-Type including Content-Range fields |
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| [52] | 626 | for each part. If a Content-Length 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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| 627 | </li> |
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| 628 | <li>Date</li> |
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| 629 | <li>ETag and/or Content-Location, if the header would have been sent in a 200 response to the same request</li> |
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| 630 | <li>Expires, Cache-Control, and/or Vary, if the field-value might differ from that sent in any previous response for the same |
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| 631 | variant |
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| 632 | </li> |
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| 633 | </ul> |
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| [205] | 634 | <p id="rfc.section.4.1.p.3">If the 206 response is the result of an If-Range request, the response <em class="bcp14">SHOULD NOT</em> include other entity-headers. Otherwise, the response <em class="bcp14">MUST</em> include all of the entity-headers that would have been returned with a 200 (OK) response to the same request. |
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| [52] | 635 | </p> |
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| [205] | 636 | <p id="rfc.section.4.1.p.4">A cache <em class="bcp14">MUST NOT</em> combine a 206 response with other previously cached content if the ETag or Last-Modified headers do not match exactly, see <a href="#combining.byte.ranges" title="Combining Byte Ranges">Section 5</a>. |
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| [52] | 637 | </p> |
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| [205] | 638 | <p id="rfc.section.4.1.p.5">A cache that does not support the Range and Content-Range headers <em class="bcp14">MUST NOT</em> cache 206 (Partial Content) responses. |
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| [52] | 639 | </p> |
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| 640 | <div id="rfc.iref.4"></div> |
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| 641 | <div id="rfc.iref.s.2"></div> |
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| [205] | 642 | <h2 id="rfc.section.4.2"><a href="#rfc.section.4.2">4.2</a> <a id="status.416" href="#status.416">416 Requested Range Not Satisfiable</a></h2> |
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| [359] | 643 | <p id="rfc.section.4.2.p.1">A server <em class="bcp14">SHOULD</em> return a response with this status code if a request included a Range request-header field (<a href="#header.range" id="rfc.xref.header.range.3" title="Range">Section 6.4</a>), and none of the ranges-specifier values in this field overlap the current extent of the selected resource, and the request |
|---|
| [52] | 644 | did not include an If-Range request-header field. (For byte-ranges, this means that the first-byte-pos of all of the byte-range-spec |
|---|
| 645 | values were greater than the current length of the selected resource.) |
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| 646 | </p> |
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| [205] | 647 | <p id="rfc.section.4.2.p.2">When this status code is returned for a byte-range request, the response <em class="bcp14">SHOULD</em> include a Content-Range entity-header field specifying the current length of the selected resource (see <a href="#header.content-range" id="rfc.xref.header.content-range.3" title="Content-Range">Section 6.2</a>). This response <em class="bcp14">MUST NOT</em> use the multipart/byteranges content-type. |
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| [52] | 648 | </p> |
|---|
| [205] | 649 | <h1 id="rfc.section.5"><a href="#rfc.section.5">5.</a> <a id="combining.byte.ranges" href="#combining.byte.ranges">Combining Byte Ranges</a></h1> |
|---|
| 650 | <p id="rfc.section.5.p.1">A response might transfer only a subrange of the bytes of an entity-body, either because the request included one or more |
|---|
| [52] | 651 | Range specifications, or because a connection was broken prematurely. After several such transfers, a cache might have received |
|---|
| 652 | several ranges of the same entity-body. |
|---|
| 653 | </p> |
|---|
| [205] | 654 | <p id="rfc.section.5.p.2">If a cache has a stored non-empty set of subranges for an entity, and an incoming response transfers another subrange, the |
|---|
| [52] | 655 | cache <em class="bcp14">MAY</em> combine the new subrange with the existing set if both the following conditions are met: |
|---|
| 656 | </p> |
|---|
| 657 | <ul> |
|---|
| 658 | <li>Both the incoming response and the cache entry have a cache validator.</li> |
|---|
| [205] | 659 | <li>The two cache validators match using the strong comparison function (see <a href="p4-conditional.html#weak.and.strong.validators" title="Weak and Strong Validators">Section 5</a> of <a href="#Part4" id="rfc.xref.Part4.2"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>). |
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| [52] | 660 | </li> |
|---|
| 661 | </ul> |
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| [205] | 662 | <p id="rfc.section.5.p.3">If either requirement is not met, the cache <em class="bcp14">MUST</em> use only the most recent partial response (based on the Date values transmitted with every response, and using the incoming |
|---|
| [52] | 663 | response if these values are equal or missing), and <em class="bcp14">MUST</em> discard the other partial information. |
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| 664 | </p> |
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| [205] | 665 | <h1 id="rfc.section.6"><a href="#rfc.section.6">6.</a> <a id="header.fields" href="#header.fields">Header Field Definitions</a></h1> |
|---|
| 666 | <p id="rfc.section.6.p.1">This section defines the syntax and semantics of HTTP/1.1 header fields related to range requests and partial responses.</p> |
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| 667 | <p id="rfc.section.6.p.2">For entity-header fields, both sender and recipient refer to either the client or the server, depending on who sends and who |
|---|
| [117] | 668 | receives the entity. |
|---|
| [52] | 669 | </p> |
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| 670 | <div id="rfc.iref.a.1"></div> |
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| 671 | <div id="rfc.iref.h.1"></div> |
|---|
| [205] | 672 | <h2 id="rfc.section.6.1"><a href="#rfc.section.6.1">6.1</a> <a id="header.accept-ranges" href="#header.accept-ranges">Accept-Ranges</a></h2> |
|---|
| [363] | 673 | <p id="rfc.section.6.1.p.1">The response-header "Accept-Ranges" field allows the server to indicate its acceptance of range requests for a resource:</p> |
|---|
| [366] | 674 | <div id="rfc.figure.u.6"></div><pre class="inline"><span id="rfc.iref.g.4"></span><span id="rfc.iref.g.5"></span><span id="rfc.iref.g.6"></span> <a href="#header.accept-ranges" class="smpl">Accept-Ranges</a> = "Accept-Ranges" ":" <a href="#notation" class="smpl">OWS</a> <a href="#header.accept-ranges" class="smpl">Accept-Ranges-v</a> |
|---|
| [363] | 675 | <a href="#header.accept-ranges" class="smpl">Accept-Ranges-v</a> = <a href="#header.accept-ranges" class="smpl">acceptable-ranges</a> |
|---|
| [334] | 676 | <a href="#header.accept-ranges" class="smpl">acceptable-ranges</a> = 1#<a href="#range.units" class="smpl">range-unit</a> / "none" |
|---|
| [205] | 677 | </pre><p id="rfc.section.6.1.p.3">Origin servers that accept byte-range requests <em class="bcp14">MAY</em> send |
|---|
| [52] | 678 | </p> |
|---|
| [363] | 679 | <div id="rfc.figure.u.7"></div><pre class="text"> Accept-Ranges: bytes |
|---|
| [205] | 680 | </pre><p id="rfc.section.6.1.p.5">but are not required to do so. Clients <em class="bcp14">MAY</em> generate byte-range requests without having received this header for the resource involved. Range units are defined in <a href="#range.units" title="Range Units">Section 3</a>. |
|---|
| [52] | 681 | </p> |
|---|
| [205] | 682 | <p id="rfc.section.6.1.p.6">Servers that do not accept any kind of range request for a resource <em class="bcp14">MAY</em> send |
|---|
| [52] | 683 | </p> |
|---|
| [363] | 684 | <div id="rfc.figure.u.8"></div><pre class="text"> Accept-Ranges: none |
|---|
| [205] | 685 | </pre><p id="rfc.section.6.1.p.8">to advise the client not to attempt a range request.</p> |
|---|
| [52] | 686 | <div id="rfc.iref.c.1"></div> |
|---|
| 687 | <div id="rfc.iref.h.2"></div> |
|---|
| [205] | 688 | <h2 id="rfc.section.6.2"><a href="#rfc.section.6.2">6.2</a> <a id="header.content-range" href="#header.content-range">Content-Range</a></h2> |
|---|
| [363] | 689 | <p id="rfc.section.6.2.p.1">The entity-header "Content-Range" is sent with a partial entity-body to specify where in the full entity-body the partial |
|---|
| 690 | body should be applied. Range units are defined in <a href="#range.units" title="Range Units">Section 3</a>. |
|---|
| [52] | 691 | </p> |
|---|
| [366] | 692 | <div id="rfc.figure.u.9"></div><pre class="inline"><span id="rfc.iref.g.7"></span><span id="rfc.iref.g.8"></span><span id="rfc.iref.g.9"></span><span id="rfc.iref.g.10"></span><span id="rfc.iref.g.11"></span><span id="rfc.iref.g.12"></span> <a href="#header.content-range" class="smpl">Content-Range</a> = "Content-Range" ":" <a href="#notation" class="smpl">OWS</a> <a href="#header.content-range" class="smpl">Content-Range-v</a> |
|---|
| [363] | 693 | <a href="#header.content-range" class="smpl">Content-Range-v</a> = <a href="#header.content-range" class="smpl">content-range-spec</a> |
|---|
| [135] | 694 | |
|---|
| [229] | 695 | <a href="#header.content-range" class="smpl">content-range-spec</a> = <a href="#header.content-range" class="smpl">byte-content-range-spec</a> |
|---|
| 696 | <a href="#header.content-range" class="smpl">byte-content-range-spec</a> = <a href="#range.units" class="smpl">bytes-unit</a> <a href="#notation" class="smpl">SP</a> |
|---|
| 697 | <a href="#header.content-range" class="smpl">byte-range-resp-spec</a> "/" |
|---|
| [334] | 698 | ( <a href="#header.content-range" class="smpl">instance-length</a> / "*" ) |
|---|
| [135] | 699 | |
|---|
| [308] | 700 | <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>) |
|---|
| [334] | 701 | / "*" |
|---|
| [308] | 702 | |
|---|
| 703 | <a href="#header.content-range" class="smpl">instance-length</a> = 1*<a href="#notation" class="smpl">DIGIT</a> |
|---|
| [205] | 704 | </pre><p id="rfc.section.6.2.p.3">The header <em class="bcp14">SHOULD</em> indicate the total length of the full entity-body, unless this length is unknown or difficult to determine. The asterisk "*" |
|---|
| [52] | 705 | character means that the instance-length is unknown at the time when the response was generated. |
|---|
| 706 | </p> |
|---|
| [205] | 707 | <p id="rfc.section.6.2.p.4">Unlike byte-ranges-specifier values (see <a href="#byte.ranges" title="Byte Ranges">Section 6.4.1</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. |
|---|
| [52] | 708 | </p> |
|---|
| [205] | 709 | <p id="rfc.section.6.2.p.5">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 |
|---|
| [52] | 710 | 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. |
|---|
| 711 | </p> |
|---|
| [205] | 712 | <p id="rfc.section.6.2.p.6">A server sending a response with status code 416 (Requested range not satisfiable) <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 |
|---|
| [52] | 713 | selected resource. A response with status code 206 (Partial Content) <em class="bcp14">MUST NOT</em> include a Content-Range field with a byte-range-resp-spec of "*". |
|---|
| 714 | </p> |
|---|
| [205] | 715 | <p id="rfc.section.6.2.p.7">Examples of byte-content-range-spec values, assuming that the entity contains a total of 1234 bytes: </p> |
|---|
| [52] | 716 | <ul> |
|---|
| 717 | <li>The first 500 bytes: |
|---|
| [205] | 718 | <div id="rfc.figure.u.10"></div><pre class="text"> bytes 0-499/1234 |
|---|
| [52] | 719 | </pre> </li> |
|---|
| 720 | <li>The second 500 bytes: |
|---|
| [205] | 721 | <div id="rfc.figure.u.11"></div><pre class="text"> bytes 500-999/1234 |
|---|
| [52] | 722 | </pre> </li> |
|---|
| 723 | <li>All except for the first 500 bytes: |
|---|
| [205] | 724 | <div id="rfc.figure.u.12"></div><pre class="text"> bytes 500-1233/1234 |
|---|
| [52] | 725 | </pre> </li> |
|---|
| 726 | <li>The last 500 bytes: |
|---|
| [205] | 727 | <div id="rfc.figure.u.13"></div><pre class="text"> bytes 734-1233/1234 |
|---|
| [52] | 728 | </pre> </li> |
|---|
| 729 | </ul> |
|---|
| [205] | 730 | <p id="rfc.section.6.2.p.8">When an HTTP message includes the content of a single range (for example, a response to a request for a single range, or to |
|---|
| [52] | 731 | a request for a set of ranges that overlap without any holes), this content is transmitted with a Content-Range header, and |
|---|
| 732 | a Content-Length header showing the number of bytes actually transferred. For example, |
|---|
| 733 | </p> |
|---|
| [363] | 734 | <div id="rfc.figure.u.14"></div><pre class="text"> HTTP/1.1 206 Partial Content |
|---|
| 735 | Date: Wed, 15 Nov 1995 06:25:24 GMT |
|---|
| 736 | Last-Modified: Wed, 15 Nov 1995 04:58:08 GMT |
|---|
| 737 | Content-Range: bytes 21010-47021/47022 |
|---|
| 738 | Content-Length: 26012 |
|---|
| 739 | Content-Type: image/gif |
|---|
| [205] | 740 | </pre><p id="rfc.section.6.2.p.10">When an HTTP message includes the content of multiple ranges (for example, a response to a request for multiple non-overlapping |
|---|
| [52] | 741 | ranges), these are transmitted as a multipart message. The multipart media type used for this purpose is "multipart/byteranges" |
|---|
| [99] | 742 | as defined in <a href="#internet.media.type.multipart.byteranges" title="Internet Media Type multipart/byteranges">Appendix A</a>. See <a href="#changes.from.rfc.2068" title="Changes from RFC 2068">Appendix B.1</a> for a compatibility issue. |
|---|
| [52] | 743 | </p> |
|---|
| [205] | 744 | <p id="rfc.section.6.2.p.11">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 byte-ranges in a single request. |
|---|
| [52] | 745 | </p> |
|---|
| [205] | 746 | <p id="rfc.section.6.2.p.12">When a client requests multiple byte-ranges in one request, the server <em class="bcp14">SHOULD</em> return them in the order that they appeared in the request. |
|---|
| [52] | 747 | </p> |
|---|
| [205] | 748 | <p id="rfc.section.6.2.p.13">If the server ignores a byte-range-spec because it is syntactically invalid, the server <em class="bcp14">SHOULD</em> treat the request as if the invalid Range header field did not exist. (Normally, this means return a 200 response containing |
|---|
| [52] | 749 | the full entity). |
|---|
| 750 | </p> |
|---|
| [205] | 751 | <p id="rfc.section.6.2.p.14">If the server receives a request (other than one including an If-Range request-header field) with an unsatisfiable Range request-header |
|---|
| [52] | 752 | field (that is, all of whose byte-range-spec values have a first-byte-pos value greater than the current length of the selected |
|---|
| [205] | 753 | resource), it <em class="bcp14">SHOULD</em> return a response code of 416 (Requested range not satisfiable) (<a href="#status.416" id="rfc.xref.status.416.1" title="416 Requested Range Not Satisfiable">Section 4.2</a>). |
|---|
| [52] | 754 | </p> |
|---|
| [1099] | 755 | <ul class="empty"> |
|---|
| 756 | <li> <b>Note:</b> clients cannot depend on servers to send a 416 (Requested range not satisfiable) response instead of a 200 (OK) response for |
|---|
| [52] | 757 | an unsatisfiable Range request-header, since not all servers implement this request-header. |
|---|
| [1099] | 758 | </li> |
|---|
| 759 | </ul> |
|---|
| [52] | 760 | <div id="rfc.iref.i.1"></div> |
|---|
| 761 | <div id="rfc.iref.h.3"></div> |
|---|
| [205] | 762 | <h2 id="rfc.section.6.3"><a href="#rfc.section.6.3">6.3</a> <a id="header.if-range" href="#header.if-range">If-Range</a></h2> |
|---|
| 763 | <p id="rfc.section.6.3.p.1">If a client has a partial copy of an entity in its cache, and wishes to have an up-to-date copy of the entire entity in its |
|---|
| [52] | 764 | cache, it could use the Range request-header with a conditional GET (using either or both of If-Unmodified-Since and If-Match.) |
|---|
| 765 | However, if the condition fails because the entity has been modified, the client would then have to make a second request |
|---|
| 766 | to obtain the entire current entity-body. |
|---|
| 767 | </p> |
|---|
| [363] | 768 | <p id="rfc.section.6.3.p.2">The request header "If-Range" allows a client to "short-circuit" the second request. Informally, its meaning is `if the entity |
|---|
| 769 | is unchanged, send me the part(s) that I am missing; otherwise, send me the entire new entity'. |
|---|
| [52] | 770 | </p> |
|---|
| [366] | 771 | <div id="rfc.figure.u.15"></div><pre class="inline"><span id="rfc.iref.g.13"></span><span id="rfc.iref.g.14"></span> <a href="#header.if-range" class="smpl">If-Range</a> = "If-Range" ":" <a href="#notation" class="smpl">OWS</a> <a href="#header.if-range" class="smpl">If-Range-v</a> |
|---|
| [363] | 772 | <a href="#header.if-range" class="smpl">If-Range-v</a> = <a href="#abnf.dependencies" class="smpl">entity-tag</a> / <a href="#abnf.dependencies" class="smpl">HTTP-date</a> |
|---|
| [205] | 773 | </pre><p id="rfc.section.6.3.p.4">If the client has no entity tag for an entity, but does have a Last-Modified date, it <em class="bcp14">MAY</em> use that date in an If-Range header. (The server can distinguish between a valid HTTP-date and any form of entity-tag by examining |
|---|
| [52] | 774 | no more than two characters.) The If-Range header <em class="bcp14">SHOULD</em> only be used together with a Range header, and <em class="bcp14">MUST</em> be ignored if the request does not include a Range header, or if the server does not support the sub-range operation. |
|---|
| 775 | </p> |
|---|
| [205] | 776 | <p id="rfc.section.6.3.p.5">If the entity tag given in the If-Range header matches the current entity tag for the entity, then the server <em class="bcp14">SHOULD</em> provide the specified sub-range of the entity using a 206 (Partial Content) response. If the entity tag does not match, then |
|---|
| [52] | 777 | the server <em class="bcp14">SHOULD</em> return the entire entity using a 200 (OK) response. |
|---|
| 778 | </p> |
|---|
| 779 | <div id="rfc.iref.r.1"></div> |
|---|
| 780 | <div id="rfc.iref.h.4"></div> |
|---|
| [205] | 781 | <h2 id="rfc.section.6.4"><a href="#rfc.section.6.4">6.4</a> <a id="header.range" href="#header.range">Range</a></h2> |
|---|
| 782 | <h3 id="rfc.section.6.4.1"><a href="#rfc.section.6.4.1">6.4.1</a> <a id="byte.ranges" href="#byte.ranges">Byte Ranges</a></h3> |
|---|
| 783 | <p id="rfc.section.6.4.1.p.1">Since all HTTP entities are represented in HTTP messages as sequences of bytes, the concept of a byte range is meaningful |
|---|
| [52] | 784 | for any HTTP entity. (However, not all clients and servers need to support byte-range operations.) |
|---|
| 785 | </p> |
|---|
| [205] | 786 | <p id="rfc.section.6.4.1.p.2">Byte range specifications in HTTP apply to the sequence of bytes in the entity-body (not necessarily the same as the message-body).</p> |
|---|
| [229] | 787 | <div id="rule.ranges-specifier"> |
|---|
| 788 | <p id="rfc.section.6.4.1.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 entity. |
|---|
| 789 | </p> |
|---|
| 790 | </div> |
|---|
| [363] | 791 | <div id="rfc.figure.u.16"></div><pre class="inline"><span id="rfc.iref.g.15"></span><span id="rfc.iref.g.16"></span><span id="rfc.iref.g.17"></span><span id="rfc.iref.g.18"></span><span id="rfc.iref.g.19"></span><span id="rfc.iref.g.20"></span> <a href="#rule.ranges-specifier" class="smpl">ranges-specifier</a> = <a href="#rule.ranges-specifier" class="smpl">byte-ranges-specifier</a> |
|---|
| [229] | 792 | <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> |
|---|
| [334] | 793 | <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> ) |
|---|
| [229] | 794 | <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>] |
|---|
| 795 | <a href="#rule.ranges-specifier" class="smpl">first-byte-pos</a> = 1*<a href="#notation" class="smpl">DIGIT</a> |
|---|
| 796 | <a href="#rule.ranges-specifier" class="smpl">last-byte-pos</a> = 1*<a href="#notation" class="smpl">DIGIT</a> |
|---|
| [205] | 797 | </pre><p id="rfc.section.6.4.1.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 |
|---|
| [52] | 798 | gives the byte-offset of the last byte in the range; that is, the byte positions specified are inclusive. Byte offsets start |
|---|
| 799 | at zero. |
|---|
| 800 | </p> |
|---|
| [205] | 801 | <p id="rfc.section.6.4.1.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 |
|---|
| [52] | 802 | 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. |
|---|
| 803 | </p> |
|---|
| [205] | 804 | <p id="rfc.section.6.4.1.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 entity-body, last-byte-pos |
|---|
| [52] | 805 | is taken to be equal to one less than the current length of the entity-body in bytes. |
|---|
| 806 | </p> |
|---|
| [205] | 807 | <p id="rfc.section.6.4.1.p.8">By its choice of last-byte-pos, a client can limit the number of bytes retrieved without knowing the size of the entity.</p> |
|---|
| [363] | 808 | <div id="rfc.figure.u.17"></div><pre class="inline"><span id="rfc.iref.g.21"></span><span id="rfc.iref.g.22"></span> <a href="#rule.ranges-specifier" class="smpl">suffix-byte-range-spec</a> = "-" <a href="#rule.ranges-specifier" class="smpl">suffix-length</a> |
|---|
| [229] | 809 | <a href="#rule.ranges-specifier" class="smpl">suffix-length</a> = 1*<a href="#notation" class="smpl">DIGIT</a> |
|---|
| [205] | 810 | </pre><p id="rfc.section.6.4.1.p.10">A suffix-byte-range-spec is used to specify the suffix of the entity-body, of a length given by the suffix-length value. (That |
|---|
| [52] | 811 | is, this form specifies the last N bytes of an entity-body.) If the entity is shorter than the specified suffix-length, the |
|---|
| 812 | entire entity-body is used. |
|---|
| 813 | </p> |
|---|
| [205] | 814 | <p id="rfc.section.6.4.1.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 |
|---|
| [52] | 815 | length of the entity-body, or at least one suffix-byte-range-spec with a non-zero suffix-length, then the byte-range-set is |
|---|
| 816 | 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 status of 416 (Requested range not satisfiable). Otherwise, the server <em class="bcp14">SHOULD</em> return a response with a status of 206 (Partial Content) containing the satisfiable ranges of the entity-body. |
|---|
| 817 | </p> |
|---|
| [205] | 818 | <p id="rfc.section.6.4.1.p.12">Examples of byte-ranges-specifier values (assuming an entity-body of length 10000): </p> |
|---|
| [52] | 819 | <ul> |
|---|
| 820 | <li>The first 500 bytes (byte offsets 0-499, inclusive): bytes=0-499</li> |
|---|
| 821 | <li>The second 500 bytes (byte offsets 500-999, inclusive): bytes=500-999</li> |
|---|
| 822 | <li>The final 500 bytes (byte offsets 9500-9999, inclusive): bytes=-500</li> |
|---|
| 823 | <li>Or bytes=9500-</li> |
|---|
| 824 | <li>The first and last bytes only (bytes 0 and 9999): bytes=0-0,-1</li> |
|---|
| 825 | <li>Several legal but not canonical specifications of the second 500 bytes (byte offsets 500-999, inclusive): <br> bytes=500-600,601-999<br> bytes=500-700,601-999 |
|---|
| 826 | </li> |
|---|
| 827 | </ul> |
|---|
| [205] | 828 | <h3 id="rfc.section.6.4.2"><a href="#rfc.section.6.4.2">6.4.2</a> <a id="range.retrieval.requests" href="#range.retrieval.requests">Range Retrieval Requests</a></h3> |
|---|
| 829 | <p id="rfc.section.6.4.2.p.1">HTTP retrieval requests using conditional or unconditional GET methods <em class="bcp14">MAY</em> request one or more sub-ranges of the entity, instead of the entire entity, using the Range request header, which applies |
|---|
| [52] | 830 | to the entity returned as the result of the request: |
|---|
| 831 | </p> |
|---|
| [366] | 832 | <div id="rfc.figure.u.18"></div><pre class="inline"><span id="rfc.iref.g.23"></span><span id="rfc.iref.g.24"></span> <a href="#range.retrieval.requests" class="smpl">Range</a> = "Range" ":" <a href="#notation" class="smpl">OWS</a> <a href="#range.retrieval.requests" class="smpl">Range-v</a> |
|---|
| [363] | 833 | <a href="#range.retrieval.requests" class="smpl">Range-v</a> = <a href="#rule.ranges-specifier" class="smpl">ranges-specifier</a> |
|---|
| [205] | 834 | </pre><p id="rfc.section.6.4.2.p.3">A server <em class="bcp14">MAY</em> ignore the Range header. However, HTTP/1.1 origin servers and intermediate caches ought to support byte ranges when possible, |
|---|
| [52] | 835 | since Range supports efficient recovery from partially failed transfers, and supports efficient partial retrieval of large |
|---|
| 836 | entities. |
|---|
| 837 | </p> |
|---|
| [205] | 838 | <p id="rfc.section.6.4.2.p.4">If the server supports the Range header and the specified range or ranges are appropriate for the entity: </p> |
|---|
| [52] | 839 | <ul> |
|---|
| 840 | <li>The presence of a Range header in an unconditional GET modifies what is returned if the GET is otherwise successful. In other |
|---|
| 841 | words, the response carries a status code of 206 (Partial Content) instead of 200 (OK). |
|---|
| 842 | </li> |
|---|
| 843 | <li>The presence of a Range header in a conditional GET (a request using one or both of If-Modified-Since and If-None-Match, or |
|---|
| 844 | one or both of If-Unmodified-Since and If-Match) modifies what is returned if the GET is otherwise successful and the condition |
|---|
| 845 | is true. It does not affect the 304 (Not Modified) response returned if the conditional is false. |
|---|
| 846 | </li> |
|---|
| 847 | </ul> |
|---|
| [205] | 848 | <p id="rfc.section.6.4.2.p.5">In some cases, it might be more appropriate to use the If-Range header (see <a href="#header.if-range" id="rfc.xref.header.if-range.2" title="If-Range">Section 6.3</a>) in addition to the Range header. |
|---|
| [52] | 849 | </p> |
|---|
| [205] | 850 | <p id="rfc.section.6.4.2.p.6">If a proxy that supports ranges receives a Range request, forwards the request to an inbound server, and receives an entire |
|---|
| [52] | 851 | entity in reply, it <em class="bcp14">SHOULD</em> only return the requested range to its client. It <em class="bcp14">SHOULD</em> store the entire received response in its cache if that is consistent with its cache allocation policies. |
|---|
| 852 | </p> |
|---|
| [205] | 853 | <h1 id="rfc.section.7"><a href="#rfc.section.7">7.</a> <a id="IANA.considerations" href="#IANA.considerations">IANA Considerations</a></h1> |
|---|
| [253] | 854 | <h2 id="rfc.section.7.1"><a href="#rfc.section.7.1">7.1</a> <a id="message.header.registration" href="#message.header.registration">Message Header Registration</a></h2> |
|---|
| 855 | <p id="rfc.section.7.1.p.1">The Message Header 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>> should be updated with the permanent registrations below (see <a href="#RFC3864" id="rfc.xref.RFC3864.1"><cite title="Registration Procedures for Message Header Fields">[RFC3864]</cite></a>): |
|---|
| [203] | 856 | </p> |
|---|
| [290] | 857 | <div id="rfc.table.1"> |
|---|
| 858 | <div id="iana.header.registration.table"></div> |
|---|
| [1099] | 859 | <table class="tt full left" cellpadding="3" cellspacing="0"> |
|---|
| [253] | 860 | <thead> |
|---|
| 861 | <tr> |
|---|
| 862 | <th>Header Field Name</th> |
|---|
| 863 | <th>Protocol</th> |
|---|
| 864 | <th>Status</th> |
|---|
| 865 | <th>Reference</th> |
|---|
| 866 | </tr> |
|---|
| 867 | </thead> |
|---|
| 868 | <tbody> |
|---|
| 869 | <tr> |
|---|
| [1099] | 870 | <td class="left">Accept-Ranges</td> |
|---|
| 871 | <td class="left">http</td> |
|---|
| 872 | <td class="left">standard</td> |
|---|
| 873 | <td class="left"> <a href="#header.accept-ranges" id="rfc.xref.header.accept-ranges.1" title="Accept-Ranges">Section 6.1</a> |
|---|
| [253] | 874 | </td> |
|---|
| 875 | </tr> |
|---|
| 876 | <tr> |
|---|
| [1099] | 877 | <td class="left">Content-Range</td> |
|---|
| 878 | <td class="left">http</td> |
|---|
| 879 | <td class="left">standard</td> |
|---|
| 880 | <td class="left"> <a href="#header.content-range" id="rfc.xref.header.content-range.4" title="Content-Range">Section 6.2</a> |
|---|
| [253] | 881 | </td> |
|---|
| 882 | </tr> |
|---|
| 883 | <tr> |
|---|
| [1099] | 884 | <td class="left">If-Range</td> |
|---|
| 885 | <td class="left">http</td> |
|---|
| 886 | <td class="left">standard</td> |
|---|
| 887 | <td class="left"> <a href="#header.if-range" id="rfc.xref.header.if-range.3" title="If-Range">Section 6.3</a> |
|---|
| [253] | 888 | </td> |
|---|
| 889 | </tr> |
|---|
| 890 | <tr> |
|---|
| [1099] | 891 | <td class="left">Range</td> |
|---|
| 892 | <td class="left">http</td> |
|---|
| 893 | <td class="left">standard</td> |
|---|
| 894 | <td class="left"> <a href="#header.range" id="rfc.xref.header.range.4" title="Range">Section 6.4</a> |
|---|
| [253] | 895 | </td> |
|---|
| 896 | </tr> |
|---|
| 897 | </tbody> |
|---|
| 898 | </table> |
|---|
| 899 | </div> |
|---|
| 900 | <p id="rfc.section.7.1.p.2">The change controller is: "IETF (iesg@ietf.org) - Internet Engineering Task Force".</p> |
|---|
| [205] | 901 | <h1 id="rfc.section.8"><a href="#rfc.section.8">8.</a> <a id="security.considerations" href="#security.considerations">Security Considerations</a></h1> |
|---|
| [371] | 902 | <p id="rfc.section.8.p.1">No additional security considerations have been identified beyond those applicable to HTTP in general <a href="#Part1" id="rfc.xref.Part1.8"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. |
|---|
| [52] | 903 | </p> |
|---|
| [205] | 904 | <h1 id="rfc.section.9"><a href="#rfc.section.9">9.</a> <a id="ack" href="#ack">Acknowledgments</a></h1> |
|---|
| 905 | <p id="rfc.section.9.p.1">Most of the specification of ranges is based on work originally done by Ari Luotonen and John Franks, with additional input |
|---|
| [159] | 906 | from Steve Zilles, Daniel W. Connolly, Roy T. Fielding, Jim Gettys, Martin Hamilton, Koen Holtman, Shel Kaplan, Paul Leach, |
|---|
| 907 | Alex Lopez-Ortiz, Larry Masinter, Jeff Mogul, Lou Montulli, David W. Morris, Luigi Rizzo, and Bill Weihl. |
|---|
| [52] | 908 | </p> |
|---|
| [205] | 909 | <h1 id="rfc.references"><a id="rfc.section.10" href="#rfc.section.10">10.</a> References |
|---|
| [52] | 910 | </h1> |
|---|
| [205] | 911 | <h2 id="rfc.references.1"><a href="#rfc.section.10.1" id="rfc.section.10.1">10.1</a> Normative References |
|---|
| [119] | 912 | </h2> |
|---|
| [1099] | 913 | <table> |
|---|
| [52] | 914 | <tr> |
|---|
| 915 | <td class="reference"><b id="Part1">[Part1]</b></td> |
|---|
| [1099] | 916 | <td class="top"><a href="mailto:fielding@gbiv.com" title="Day Software">Fielding, R., Ed.</a>, <a href="mailto:jg@laptop.org" title="One Laptop per Child">Gettys, J.</a>, <a href="mailto:JeffMogul@acm.org" title="Hewlett-Packard Company">Mogul, J.</a>, <a href="mailto:henrikn@microsoft.com" title="Microsoft Corporation">Frystyk, H.</a>, <a href="mailto:LMM@acm.org" title="Adobe Systems, Incorporated">Masinter, L.</a>, <a href="mailto:paulle@microsoft.com" title="Microsoft Corporation">Leach, P.</a>, <a href="mailto:timbl@w3.org" title="World Wide Web Consortium">Berners-Lee, T.</a>, <a href="mailto:ylafon@w3.org" title="World Wide Web Consortium">Lafon, Y., 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-05">HTTP/1.1, part 1: URIs, Connections, and Message Parsing</a>”, Internet-Draft draft-ietf-httpbis-p1-messaging-05 (work in progress), November 2008. |
|---|
| [52] | 917 | </td> |
|---|
| 918 | </tr> |
|---|
| 919 | <tr> |
|---|
| [138] | 920 | <td class="reference"><b id="Part3">[Part3]</b></td> |
|---|
| [1099] | 921 | <td class="top"><a href="mailto:fielding@gbiv.com" title="Day Software">Fielding, R., Ed.</a>, <a href="mailto:jg@laptop.org" title="One Laptop per Child">Gettys, J.</a>, <a href="mailto:JeffMogul@acm.org" title="Hewlett-Packard Company">Mogul, J.</a>, <a href="mailto:henrikn@microsoft.com" title="Microsoft Corporation">Frystyk, H.</a>, <a href="mailto:LMM@acm.org" title="Adobe Systems, Incorporated">Masinter, L.</a>, <a href="mailto:paulle@microsoft.com" title="Microsoft Corporation">Leach, P.</a>, <a href="mailto:timbl@w3.org" title="World Wide Web Consortium">Berners-Lee, T.</a>, <a href="mailto:ylafon@w3.org" title="World Wide Web Consortium">Lafon, Y., 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-p3-payload-05">HTTP/1.1, part 3: Message Payload and Content Negotiation</a>”, Internet-Draft draft-ietf-httpbis-p3-payload-05 (work in progress), November 2008. |
|---|
| [138] | 922 | </td> |
|---|
| 923 | </tr> |
|---|
| 924 | <tr> |
|---|
| [52] | 925 | <td class="reference"><b id="Part4">[Part4]</b></td> |
|---|
| [1099] | 926 | <td class="top"><a href="mailto:fielding@gbiv.com" title="Day Software">Fielding, R., Ed.</a>, <a href="mailto:jg@laptop.org" title="One Laptop per Child">Gettys, J.</a>, <a href="mailto:JeffMogul@acm.org" title="Hewlett-Packard Company">Mogul, J.</a>, <a href="mailto:henrikn@microsoft.com" title="Microsoft Corporation">Frystyk, H.</a>, <a href="mailto:LMM@acm.org" title="Adobe Systems, Incorporated">Masinter, L.</a>, <a href="mailto:paulle@microsoft.com" title="Microsoft Corporation">Leach, P.</a>, <a href="mailto:timbl@w3.org" title="World Wide Web Consortium">Berners-Lee, T.</a>, <a href="mailto:ylafon@w3.org" title="World Wide Web Consortium">Lafon, Y., 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-05">HTTP/1.1, part 4: Conditional Requests</a>”, Internet-Draft draft-ietf-httpbis-p4-conditional-05 (work in progress), November 2008. |
|---|
| [52] | 927 | </td> |
|---|
| 928 | </tr> |
|---|
| 929 | <tr> |
|---|
| [138] | 930 | <td class="reference"><b id="Part6">[Part6]</b></td> |
|---|
| [1099] | 931 | <td class="top"><a href="mailto:fielding@gbiv.com" title="Day Software">Fielding, R., Ed.</a>, <a href="mailto:jg@laptop.org" title="One Laptop per Child">Gettys, J.</a>, <a href="mailto:JeffMogul@acm.org" title="Hewlett-Packard Company">Mogul, J.</a>, <a href="mailto:henrikn@microsoft.com" title="Microsoft Corporation">Frystyk, H.</a>, <a href="mailto:LMM@acm.org" title="Adobe Systems, Incorporated">Masinter, L.</a>, <a href="mailto:paulle@microsoft.com" title="Microsoft Corporation">Leach, P.</a>, <a href="mailto:timbl@w3.org" title="World Wide Web Consortium">Berners-Lee, T.</a>, <a href="mailto:ylafon@w3.org" title="World Wide Web Consortium">Lafon, Y., 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-05">HTTP/1.1, part 6: Caching</a>”, Internet-Draft draft-ietf-httpbis-p6-cache-05 (work in progress), November 2008. |
|---|
| [138] | 932 | </td> |
|---|
| 933 | </tr> |
|---|
| 934 | <tr> |
|---|
| [131] | 935 | <td class="reference"><b id="RFC2046">[RFC2046]</b></td> |
|---|
| [1099] | 936 | <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. |
|---|
| [131] | 937 | </td> |
|---|
| 938 | </tr> |
|---|
| 939 | <tr> |
|---|
| [96] | 940 | <td class="reference"><b id="RFC2119">[RFC2119]</b></td> |
|---|
| [1099] | 941 | <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. |
|---|
| [96] | 942 | </td> |
|---|
| 943 | </tr> |
|---|
| [119] | 944 | </table> |
|---|
| [205] | 945 | <h2 id="rfc.references.2"><a href="#rfc.section.10.2" id="rfc.section.10.2">10.2</a> Informative References |
|---|
| [119] | 946 | </h2> |
|---|
| [1099] | 947 | <table> |
|---|
| [96] | 948 | <tr> |
|---|
| [52] | 949 | <td class="reference"><b id="RFC2616">[RFC2616]</b></td> |
|---|
| [1099] | 950 | <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. |
|---|
| [52] | 951 | </td> |
|---|
| 952 | </tr> |
|---|
| [196] | 953 | <tr> |
|---|
| [253] | 954 | <td class="reference"><b id="RFC3864">[RFC3864]</b></td> |
|---|
| [1099] | 955 | <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. |
|---|
| [253] | 956 | </td> |
|---|
| 957 | </tr> |
|---|
| 958 | <tr> |
|---|
| [196] | 959 | <td class="reference"><b id="RFC4288">[RFC4288]</b></td> |
|---|
| [1099] | 960 | <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. |
|---|
| [196] | 961 | </td> |
|---|
| 962 | </tr> |
|---|
| [52] | 963 | </table> |
|---|
| [1099] | 964 | <div class="avoidbreak"> |
|---|
| 965 | <h1 id="rfc.authors"><a href="#rfc.authors">Authors' Addresses</a></h1> |
|---|
| 966 | <address class="vcard"><span class="vcardline"><span class="fn">Roy T. Fielding</span> |
|---|
| 967 | (editor) |
|---|
| 968 | <span class="n hidden"><span class="family-name">Fielding</span><span class="given-name">Roy T.</span></span></span><span class="org vcardline">Day Software</span><span class="adr"><span class="street-address vcardline">23 Corporate Plaza DR, Suite 280</span><span class="vcardline"><span class="locality">Newport Beach</span>, <span class="region">CA</span> <span class="postal-code">92660</span></span><span class="country-name vcardline">USA</span></span><span class="vcardline tel">Phone: <a href="tel:+1-949-706-5300"><span class="value">+1-949-706-5300</span></a></span><span class="vcardline tel"><span class="type">Fax</span>: <a href="fax:+1-949-706-5305"><span class="value">+1-949-706-5305</span></a></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> |
|---|
| 969 | <address class="vcard"><span class="vcardline"><span class="fn">Jim Gettys</span><span class="n hidden"><span class="family-name">Gettys</span><span class="given-name">Jim</span></span></span><span class="org vcardline">One Laptop per Child</span><span class="adr"><span class="street-address vcardline">21 Oak Knoll Road</span><span class="vcardline"><span class="locality">Carlisle</span>, <span class="region">MA</span> <span class="postal-code">01741</span></span><span class="country-name vcardline">USA</span></span><span class="vcardline">EMail: <a href="mailto:jg@laptop.org"><span class="email">jg@laptop.org</span></a></span><span class="vcardline">URI: <a href="http://www.laptop.org/" class="url">http://www.laptop.org/</a></span></address> |
|---|
| 970 | <address class="vcard"><span class="vcardline"><span class="fn">Jeffrey C. Mogul</span><span class="n hidden"><span class="family-name">Mogul</span><span class="given-name">Jeffrey C.</span></span></span><span class="org vcardline">Hewlett-Packard Company</span><span class="adr"><span class="street-address vcardline">HP Labs, Large Scale Systems Group</span><span class="street-address vcardline">1501 Page Mill Road, MS 1177</span><span class="vcardline"><span class="locality">Palo Alto</span>, <span class="region">CA</span> <span class="postal-code">94304</span></span><span class="country-name vcardline">USA</span></span><span class="vcardline">EMail: <a href="mailto:JeffMogul@acm.org"><span class="email">JeffMogul@acm.org</span></a></span></address> |
|---|
| 971 | <address class="vcard"><span class="vcardline"><span class="fn">Henrik Frystyk Nielsen</span><span class="n hidden"><span class="family-name">Frystyk</span></span></span><span class="org vcardline">Microsoft Corporation</span><span class="adr"><span class="street-address vcardline">1 Microsoft Way</span><span class="vcardline"><span class="locality">Redmond</span>, <span class="region">WA</span> <span class="postal-code">98052</span></span><span class="country-name vcardline">USA</span></span><span class="vcardline">EMail: <a href="mailto:henrikn@microsoft.com"><span class="email">henrikn@microsoft.com</span></a></span></address> |
|---|
| 972 | <address class="vcard"><span class="vcardline"><span class="fn">Larry Masinter</span><span class="n hidden"><span class="family-name">Masinter</span><span class="given-name">Larry</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:LMM@acm.org"><span class="email">LMM@acm.org</span></a></span><span class="vcardline">URI: <a href="http://larry.masinter.net/" class="url">http://larry.masinter.net/</a></span></address> |
|---|
| 973 | <address class="vcard"><span class="vcardline"><span class="fn">Paul J. Leach</span><span class="n hidden"><span class="family-name">Leach</span><span class="given-name">Paul J.</span></span></span><span class="org vcardline">Microsoft Corporation</span><span class="adr"><span class="street-address vcardline">1 Microsoft Way</span><span class="vcardline"><span class="locality">Redmond</span>, <span class="region">WA</span> <span class="postal-code">98052</span></span></span><span class="vcardline">EMail: <a href="mailto:paulle@microsoft.com"><span class="email">paulle@microsoft.com</span></a></span></address> |
|---|
| 974 | <address class="vcard"><span class="vcardline"><span class="fn">Tim Berners-Lee</span><span class="n hidden"><span class="family-name">Berners-Lee</span><span class="given-name">Tim</span></span></span><span class="org vcardline">World Wide Web Consortium</span><span class="adr"><span class="street-address vcardline">MIT Computer Science and Artificial Intelligence Laboratory</span><span class="street-address vcardline">The Stata Center, Building 32</span><span class="street-address vcardline">32 Vassar Street</span><span class="vcardline"><span class="locality">Cambridge</span>, <span class="region">MA</span> <span class="postal-code">02139</span></span><span class="country-name vcardline">USA</span></span><span class="vcardline">EMail: <a href="mailto:timbl@w3.org"><span class="email">timbl@w3.org</span></a></span><span class="vcardline">URI: <a href="http://www.w3.org/People/Berners-Lee/" class="url">http://www.w3.org/People/Berners-Lee/</a></span></address> |
|---|
| 975 | <address class="vcard"><span class="vcardline"><span class="fn">Yves Lafon</span> |
|---|
| 976 | (editor) |
|---|
| 977 | <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> |
|---|
| 978 | <address class="vcard"><span class="vcardline"><span class="fn">Julian F. Reschke</span> |
|---|
| 979 | (editor) |
|---|
| 980 | <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 tel">Phone: <a href="tel:+492512807760"><span class="value">+49 251 2807760</span></a></span><span class="vcardline tel"><span class="type">Fax</span>: <a href="fax:+492512807761"><span class="value">+49 251 2807761</span></a></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> |
|---|
| 981 | </div> |
|---|
| [52] | 982 | <div id="rfc.iref.m.1"></div> |
|---|
| 983 | <div id="rfc.iref.m.2"></div> |
|---|
| [1099] | 984 | <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> |
|---|
| [52] | 985 | <p id="rfc.section.A.p.1">When an HTTP 206 (Partial Content) response message includes the content of multiple ranges (a response to a request for multiple |
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| [328] | 986 | non-overlapping ranges), these 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="#RFC4288" id="rfc.xref.RFC4288.1"><cite title="Media Type Specifications and Registration Procedures">[RFC4288]</cite></a>. |
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| [52] | 987 | </p> |
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| [332] | 988 | <p id="rfc.section.A.p.2">The multipart/byteranges media type includes one or more parts, each with its own Content-Type and Content-Range fields. The |
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| [52] | 989 | required boundary parameter specifies the boundary string used to separate each body-part. |
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| 990 | </p> |
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| 991 | <p id="rfc.section.A.p.3"> </p> |
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| 992 | <dl> |
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| [196] | 993 | <dt>Type name:</dt> |
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| [52] | 994 | <dd>multipart</dd> |
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| [196] | 995 | <dt>Subtype name:</dt> |
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| [52] | 996 | <dd>byteranges</dd> |
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| 997 | <dt>Required parameters:</dt> |
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| 998 | <dd>boundary</dd> |
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| 999 | <dt>Optional parameters:</dt> |
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| 1000 | <dd>none</dd> |
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| 1001 | <dt>Encoding considerations:</dt> |
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| 1002 | <dd>only "7bit", "8bit", or "binary" are permitted</dd> |
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| 1003 | <dt>Security considerations:</dt> |
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| 1004 | <dd>none</dd> |
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| [196] | 1005 | <dt>Interoperability considerations:</dt> |
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| 1006 | <dd>none</dd> |
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| 1007 | <dt>Published specification:</dt> |
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| 1008 | <dd>This specification (see <a href="#internet.media.type.multipart.byteranges" title="Internet Media Type multipart/byteranges">Appendix A</a>). |
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| 1009 | </dd> |
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| 1010 | <dt>Applications that use this media type:</dt> |
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| 1011 | <dt>Additional information:</dt> |
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| 1012 | <dd> |
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| 1013 | <dl> |
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| 1014 | <dt>Magic number(s):</dt> |
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| 1015 | <dd>none</dd> |
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| 1016 | <dt>File extension(s):</dt> |
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| 1017 | <dd>none</dd> |
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| 1018 | <dt>Macintosh file type code(s):</dt> |
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| 1019 | <dd>none</dd> |
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| 1020 | </dl> |
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| 1021 | </dd> |
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| 1022 | <dt>Person and email address to contact for further information:</dt> |
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| 1023 | <dd>See Authors Section.</dd> |
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| 1024 | <dt>Intended usage:</dt> |
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| 1025 | <dd>COMMON</dd> |
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| 1026 | <dt>Restrictions on usage:</dt> |
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| 1027 | <dd>none</dd> |
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| 1028 | <dt>Author/Change controller:</dt> |
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| 1029 | <dd>IESG</dd> |
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| [52] | 1030 | </dl> |
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| [205] | 1031 | <div id="rfc.figure.u.19"></div> |
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| [52] | 1032 | <p>For example:</p><pre class="text"> HTTP/1.1 206 Partial Content |
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| 1033 | Date: Wed, 15 Nov 1995 06:25:24 GMT |
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| 1034 | Last-Modified: Wed, 15 Nov 1995 04:58:08 GMT |
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| 1035 | Content-type: multipart/byteranges; boundary=THIS_STRING_SEPARATES |
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| 1036 | |
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| 1037 | --THIS_STRING_SEPARATES |
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| 1038 | Content-type: application/pdf |
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| 1039 | Content-range: bytes 500-999/8000 |
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| 1040 | |
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| 1041 | ...the first range... |
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| 1042 | --THIS_STRING_SEPARATES |
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| 1043 | Content-type: application/pdf |
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| 1044 | Content-range: bytes 7000-7999/8000 |
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| 1045 | |
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| 1046 | ...the second range |
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| 1047 | --THIS_STRING_SEPARATES-- |
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| 1048 | </pre><p id="rfc.section.A.p.5">Notes: </p> |
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| 1049 | <ol> |
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| 1050 | <li>Additional CRLFs may precede the first boundary string in the entity.</li> |
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| [196] | 1051 | <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. |
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| [52] | 1052 | </li> |
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| 1053 | <li>A number of browsers 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. |
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| 1054 | </li> |
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| 1055 | </ol> |
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| [99] | 1056 | <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a> <a id="compatibility" href="#compatibility">Compatibility with Previous Versions</a></h1> |
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| 1057 | <h2 id="rfc.section.B.1"><a href="#rfc.section.B.1">B.1</a> <a id="changes.from.rfc.2068" href="#changes.from.rfc.2068">Changes from RFC 2068</a></h2> |
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| [138] | 1058 | <p id="rfc.section.B.1.p.1">Transfer-coding and message lengths all interact in ways that required fixing exactly when chunked encoding is used (to allow |
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| 1059 | for transfer encoding that may not be self delimiting); it was important to straighten out exactly how message lengths are |
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| [371] | 1060 | computed. (<a href="#header.content-range" id="rfc.xref.header.content-range.5" title="Content-Range">Section 6.2</a>, see also <a href="#Part1" id="rfc.xref.Part1.9"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="#Part3" id="rfc.xref.Part3.1"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a> and <a href="#Part6" id="rfc.xref.Part6.1"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) |
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| [138] | 1061 | </p> |
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| 1062 | <p id="rfc.section.B.1.p.2">There are situations where a server (especially a proxy) does not know the full length of a response but is capable of serving |
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| [52] | 1063 | a byterange request. We therefore need a mechanism to allow byteranges with a content-range not indicating the full length |
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| [253] | 1064 | of the message. (<a href="#header.content-range" id="rfc.xref.header.content-range.6" title="Content-Range">Section 6.2</a>) |
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| [52] | 1065 | </p> |
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| [138] | 1066 | <p id="rfc.section.B.1.p.3">Range request responses would become very verbose if all meta-data were always returned; by allowing the server to only send |
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| [253] | 1067 | needed headers in a 206 response, this problem can be avoided. (Section <a href="#status.206" id="rfc.xref.status.206.1" title="206 Partial Content">4.1</a> and <a href="#header.if-range" id="rfc.xref.header.if-range.4" title="If-Range">6.3</a>) |
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| [52] | 1068 | </p> |
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| [138] | 1069 | <p id="rfc.section.B.1.p.4">Fix problem with unsatisfiable range requests; there are two cases: syntactic problems, and range doesn't exist in the document. |
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| [52] | 1070 | The 416 status code was needed to resolve this ambiguity needed to indicate an error for a byte range request that falls outside |
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| [253] | 1071 | of the actual contents of a document. (Section <a href="#status.416" id="rfc.xref.status.416.2" title="416 Requested Range Not Satisfiable">4.2</a>, <a href="#header.content-range" id="rfc.xref.header.content-range.7" title="Content-Range">6.2</a>) |
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| [52] | 1072 | </p> |
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| [99] | 1073 | <h2 id="rfc.section.B.2"><a href="#rfc.section.B.2">B.2</a> <a id="changes.from.rfc.2616" href="#changes.from.rfc.2616">Changes from RFC 2616</a></h2> |
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| [205] | 1074 | <p id="rfc.section.B.2.p.1">Clarify that it is not ok to use a weak cache validator in a 206 response. (<a href="#status.206" id="rfc.xref.status.206.2" title="206 Partial Content">Section 4.1</a>) |
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| [105] | 1075 | </p> |
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| [332] | 1076 | <p id="rfc.section.B.2.p.2">Clarify that multipart/byteranges can consist of a single part. (<a href="#internet.media.type.multipart.byteranges" title="Internet Media Type multipart/byteranges">Appendix A</a>) |
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| 1077 | </p> |
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| [252] | 1078 | <h1 id="rfc.section.C"><a href="#rfc.section.C">C.</a> <a id="change.log" href="#change.log">Change Log (to be removed by RFC Editor before publication)</a></h1> |
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| [115] | 1079 | <h2 id="rfc.section.C.1"><a href="#rfc.section.C.1">C.1</a> Since RFC2616 |
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| 1080 | </h2> |
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| [158] | 1081 | <p id="rfc.section.C.1.p.1">Extracted relevant partitions from <a href="#RFC2616" id="rfc.xref.RFC2616.1"><cite title="Hypertext Transfer Protocol -- HTTP/1.1">[RFC2616]</cite></a>. |
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| [115] | 1082 | </p> |
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| 1083 | <h2 id="rfc.section.C.2"><a href="#rfc.section.C.2">C.2</a> Since draft-ietf-httpbis-p5-range-00 |
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| 1084 | </h2> |
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| [116] | 1085 | <p id="rfc.section.C.2.p.1">Closed issues: </p> |
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| 1086 | <ul> |
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| [324] | 1087 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/18">http://tools.ietf.org/wg/httpbis/trac/ticket/18</a>>: "Cache validators in 206 responses" (<<a href="http://purl.org/NET/http-errata#ifrange206">http://purl.org/NET/http-errata#ifrange206</a>>) |
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| [116] | 1088 | </li> |
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| [324] | 1089 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/35">http://tools.ietf.org/wg/httpbis/trac/ticket/35</a>>: "Normative and Informative references" |
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| [152] | 1090 | </li> |
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| [324] | 1091 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/86">http://tools.ietf.org/wg/httpbis/trac/ticket/86</a>>: "Normative up-to-date references" |
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| [131] | 1092 | </li> |
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| [116] | 1093 | </ul> |
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| [170] | 1094 | <h2 id="rfc.section.C.3"><a href="#rfc.section.C.3">C.3</a> Since draft-ietf-httpbis-p5-range-01 |
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| 1095 | </h2> |
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| [200] | 1096 | <p id="rfc.section.C.3.p.1">Closed issues: </p> |
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| 1097 | <ul> |
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| [324] | 1098 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/55">http://tools.ietf.org/wg/httpbis/trac/ticket/55</a>>: "Updating to RFC4288" |
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| [200] | 1099 | </li> |
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| 1100 | </ul> |
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| [324] | 1101 | <p id="rfc.section.C.3.p.2">Ongoing work on ABNF conversion (<<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>>): |
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| [205] | 1102 | </p> |
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| 1103 | <ul> |
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| 1104 | <li>Add explicit references to BNF syntax and rules imported from other parts of the specification.</li> |
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| 1105 | </ul> |
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| [252] | 1106 | <h2 id="rfc.section.C.4"><a href="#rfc.section.C.4">C.4</a> <a id="changes.since.02" href="#changes.since.02">Since draft-ietf-httpbis-p5-range-02</a></h2> |
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| [324] | 1107 | <p id="rfc.section.C.4.p.1">Ongoing work on IANA Message Header Registration (<<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/40">http://tools.ietf.org/wg/httpbis/trac/ticket/40</a>>): |
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| [253] | 1108 | </p> |
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| 1109 | <ul> |
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| 1110 | <li>Reference RFC 3984, and update header registrations for headers defined in this document.</li> |
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| 1111 | </ul> |
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| [267] | 1112 | <h2 id="rfc.section.C.5"><a href="#rfc.section.C.5">C.5</a> <a id="changes.since.03" href="#changes.since.03">Since draft-ietf-httpbis-p5-range-03</a></h2> |
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| [323] | 1113 | <h2 id="rfc.section.C.6"><a href="#rfc.section.C.6">C.6</a> <a id="changes.since.04" href="#changes.since.04">Since draft-ietf-httpbis-p5-range-04</a></h2> |
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| [332] | 1114 | <p id="rfc.section.C.6.p.1">Closed issues: </p> |
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| 1115 | <ul> |
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| 1116 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/133">http://tools.ietf.org/wg/httpbis/trac/ticket/133</a>>: "multipart/byteranges minimum number of parts" |
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| 1117 | </li> |
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| 1118 | </ul> |
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| [334] | 1119 | <p id="rfc.section.C.6.p.2">Ongoing work on ABNF conversion (<<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>>): |
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| 1120 | </p> |
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| 1121 | <ul> |
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| 1122 | <li>Use "/" instead of "|" for alternatives.</li> |
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| [363] | 1123 | <li>Introduce new ABNF rules for "bad" whitespace ("BWS"), optional whitespace ("OWS") and required whitespace ("RWS").</li> |
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| 1124 | <li>Rewrite ABNFs to spell out whitespace rules, factor out header value format definitions.</li> |
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| [334] | 1125 | </ul> |
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| [52] | 1126 | <h1 id="rfc.index"><a href="#rfc.index">Index</a></h1> |
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| 1127 | <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.C">C</a> <a href="#rfc.index.G">G</a> <a href="#rfc.index.H">H</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> <a href="#rfc.index.S">S</a> |
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| 1128 | </p> |
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| 1129 | <div class="print2col"> |
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| 1130 | <ul class="ind"> |
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| [1099] | 1131 | <li><a id="rfc.index.2" href="#rfc.index.2"><b>2</b></a><ul> |
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| 1132 | <li>206 Partial Content (status code) <a href="#rfc.iref.3"><b>4.1</b></a>, <a href="#rfc.xref.status.206.1">B.1</a>, <a href="#rfc.xref.status.206.2">B.2</a></li> |
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| [52] | 1133 | </ul> |
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| 1134 | </li> |
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| [1099] | 1135 | <li><a id="rfc.index.4" href="#rfc.index.4"><b>4</b></a><ul> |
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| 1136 | <li>416 Requested Range Not Satisfiable (status code) <a href="#rfc.iref.4"><b>4.2</b></a>, <a href="#rfc.xref.status.416.1">6.2</a>, <a href="#rfc.xref.status.416.2">B.1</a></li> |
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| [52] | 1137 | </ul> |
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| 1138 | </li> |
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| [1099] | 1139 | <li><a id="rfc.index.A" href="#rfc.index.A"><b>A</b></a><ul> |
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| 1140 | <li>Accept-Ranges header <a href="#rfc.iref.a.1"><b>6.1</b></a>, <a href="#rfc.xref.header.accept-ranges.1">7.1</a></li> |
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| [52] | 1141 | </ul> |
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| 1142 | </li> |
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| [1099] | 1143 | <li><a id="rfc.index.C" href="#rfc.index.C"><b>C</b></a><ul> |
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| 1144 | <li>Content-Range header <a href="#rfc.xref.header.content-range.1">3</a>, <a href="#rfc.xref.header.content-range.2">4.1</a>, <a href="#rfc.xref.header.content-range.3">4.2</a>, <a href="#rfc.iref.c.1"><b>6.2</b></a>, <a href="#rfc.xref.header.content-range.4">7.1</a>, <a href="#rfc.xref.header.content-range.5">B.1</a>, <a href="#rfc.xref.header.content-range.6">B.1</a>, <a href="#rfc.xref.header.content-range.7">B.1</a></li> |
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| [52] | 1145 | </ul> |
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| 1146 | </li> |
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| [1099] | 1147 | <li><a id="rfc.index.G" href="#rfc.index.G"><b>G</b></a><ul> |
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| 1148 | <li><tt>Grammar</tt> |
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| 1149 | <ul> |
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| 1150 | <li><tt>Accept-Ranges</tt> <a href="#rfc.iref.g.4"><b>6.1</b></a></li> |
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| 1151 | <li><tt>Accept-Ranges-v</tt> <a href="#rfc.iref.g.5"><b>6.1</b></a></li> |
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| 1152 | <li><tt>acceptable-ranges</tt> <a href="#rfc.iref.g.6"><b>6.1</b></a></li> |
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| 1153 | <li><tt>byte-content-range-spec</tt> <a href="#rfc.iref.g.10"><b>6.2</b></a></li> |
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| 1154 | <li><tt>byte-range-resp-spec</tt> <a href="#rfc.iref.g.11"><b>6.2</b></a></li> |
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| 1155 | <li><tt>byte-range-set</tt> <a href="#rfc.iref.g.17"><b>6.4.1</b></a></li> |
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| 1156 | <li><tt>byte-range-spec</tt> <a href="#rfc.iref.g.18"><b>6.4.1</b></a></li> |
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| 1157 | <li><tt>byte-ranges-specifier</tt> <a href="#rfc.iref.g.16"><b>6.4.1</b></a></li> |
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| 1158 | <li><tt>bytes-unit</tt> <a href="#rfc.iref.g.2"><b>3</b></a></li> |
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| 1159 | <li><tt>Content-Range</tt> <a href="#rfc.iref.g.7"><b>6.2</b></a></li> |
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| 1160 | <li><tt>content-range-spec</tt> <a href="#rfc.iref.g.9"><b>6.2</b></a></li> |
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| 1161 | <li><tt>Content-Range-v</tt> <a href="#rfc.iref.g.8"><b>6.2</b></a></li> |
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| 1162 | <li><tt>first-byte-pos</tt> <a href="#rfc.iref.g.19"><b>6.4.1</b></a></li> |
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| 1163 | <li><tt>If-Range</tt> <a href="#rfc.iref.g.13"><b>6.3</b></a></li> |
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| 1164 | <li><tt>If-Range-v</tt> <a href="#rfc.iref.g.14"><b>6.3</b></a></li> |
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| 1165 | <li><tt>instance-length</tt> <a href="#rfc.iref.g.12"><b>6.2</b></a></li> |
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| 1166 | <li><tt>last-byte-pos</tt> <a href="#rfc.iref.g.20"><b>6.4.1</b></a></li> |
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| 1167 | <li><tt>other-range-unit</tt> <a href="#rfc.iref.g.3"><b>3</b></a></li> |
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| 1168 | <li><tt>Range</tt> <a href="#rfc.iref.g.23"><b>6.4.2</b></a></li> |
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| 1169 | <li><tt>range-unit</tt> <a href="#rfc.iref.g.1"><b>3</b></a></li> |
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| 1170 | <li><tt>Range-v</tt> <a href="#rfc.iref.g.24"><b>6.4.2</b></a></li> |
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| 1171 | <li><tt>ranges-specifier</tt> <a href="#rfc.iref.g.15"><b>6.4.1</b></a></li> |
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| 1172 | <li><tt>suffix-byte-range-spec</tt> <a href="#rfc.iref.g.21"><b>6.4.1</b></a></li> |
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| 1173 | <li><tt>suffix-length</tt> <a href="#rfc.iref.g.22"><b>6.4.1</b></a></li> |
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| [52] | 1174 | </ul> |
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| 1175 | </li> |
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| 1176 | </ul> |
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| 1177 | </li> |
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| [1099] | 1178 | <li><a id="rfc.index.H" href="#rfc.index.H"><b>H</b></a><ul> |
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| 1179 | <li>Headers |
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| 1180 | <ul> |
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| 1181 | <li>Accept-Ranges <a href="#rfc.iref.h.1"><b>6.1</b></a>, <a href="#rfc.xref.header.accept-ranges.1">7.1</a></li> |
|---|
| 1182 | <li>Content-Range <a href="#rfc.xref.header.content-range.1">3</a>, <a href="#rfc.xref.header.content-range.2">4.1</a>, <a href="#rfc.xref.header.content-range.3">4.2</a>, <a href="#rfc.iref.h.2"><b>6.2</b></a>, <a href="#rfc.xref.header.content-range.4">7.1</a>, <a href="#rfc.xref.header.content-range.5">B.1</a>, <a href="#rfc.xref.header.content-range.6">B.1</a>, <a href="#rfc.xref.header.content-range.7">B.1</a></li> |
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| 1183 | <li>If-Range <a href="#rfc.xref.header.if-range.1">4.1</a>, <a href="#rfc.iref.h.3"><b>6.3</b></a>, <a href="#rfc.xref.header.if-range.2">6.4.2</a>, <a href="#rfc.xref.header.if-range.3">7.1</a>, <a href="#rfc.xref.header.if-range.4">B.1</a></li> |
|---|
| 1184 | <li>Range <a href="#rfc.xref.header.range.1">3</a>, <a href="#rfc.xref.header.range.2">4.1</a>, <a href="#rfc.xref.header.range.3">4.2</a>, <a href="#rfc.iref.h.4"><b>6.4</b></a>, <a href="#rfc.xref.header.range.4">7.1</a></li> |
|---|
| [52] | 1185 | </ul> |
|---|
| 1186 | </li> |
|---|
| 1187 | </ul> |
|---|
| 1188 | </li> |
|---|
| [1099] | 1189 | <li><a id="rfc.index.I" href="#rfc.index.I"><b>I</b></a><ul> |
|---|
| 1190 | <li>If-Range header <a href="#rfc.xref.header.if-range.1">4.1</a>, <a href="#rfc.iref.i.1"><b>6.3</b></a>, <a href="#rfc.xref.header.if-range.2">6.4.2</a>, <a href="#rfc.xref.header.if-range.3">7.1</a>, <a href="#rfc.xref.header.if-range.4">B.1</a></li> |
|---|
| [52] | 1191 | </ul> |
|---|
| 1192 | </li> |
|---|
| [1099] | 1193 | <li><a id="rfc.index.M" href="#rfc.index.M"><b>M</b></a><ul> |
|---|
| 1194 | <li>Media Type |
|---|
| 1195 | <ul> |
|---|
| 1196 | <li>multipart/byteranges <a href="#rfc.iref.m.1"><b>A</b></a></li> |
|---|
| 1197 | <li>multipart/x-byteranges <a href="#rfc.iref.m.4">A</a></li> |
|---|
| [52] | 1198 | </ul> |
|---|
| 1199 | </li> |
|---|
| [1099] | 1200 | <li>multipart/byteranges Media Type <a href="#rfc.iref.m.2"><b>A</b></a></li> |
|---|
| 1201 | <li>multipart/x-byteranges Media Type <a href="#rfc.iref.m.3">A</a></li> |
|---|
| [52] | 1202 | </ul> |
|---|
| 1203 | </li> |
|---|
| [1099] | 1204 | <li><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul> |
|---|
| 1205 | <li><em>Part1</em> <a href="#rfc.xref.Part1.1">2</a>, <a href="#rfc.xref.Part1.2">2</a>, <a href="#rfc.xref.Part1.3">2</a>, <a href="#rfc.xref.Part1.4">2</a>, <a href="#rfc.xref.Part1.5">2</a>, <a href="#rfc.xref.Part1.6">2</a>, <a href="#rfc.xref.Part1.7">2</a>, <a href="#rfc.xref.Part1.8">8</a>, <a href="#Part1"><b>10.1</b></a>, <a href="#rfc.xref.Part1.9">B.1</a><ul> |
|---|
| 1206 | <li><em>Section 2.1</em> <a href="#rfc.xref.Part1.1">2</a></li> |
|---|
| 1207 | <li><em>Section 2.2</em> <a href="#rfc.xref.Part1.2">2</a>, <a href="#rfc.xref.Part1.3">2</a>, <a href="#rfc.xref.Part1.4">2</a>, <a href="#rfc.xref.Part1.5">2</a>, <a href="#rfc.xref.Part1.6">2</a></li> |
|---|
| 1208 | <li><em>Section 3.3.1</em> <a href="#rfc.xref.Part1.7">2</a></li> |
|---|
| [52] | 1209 | </ul> |
|---|
| 1210 | </li> |
|---|
| [1099] | 1211 | <li><em>Part3</em> <a href="#Part3"><b>10.1</b></a>, <a href="#rfc.xref.Part3.1">B.1</a></li> |
|---|
| 1212 | <li><em>Part4</em> <a href="#rfc.xref.Part4.1">2</a>, <a href="#rfc.xref.Part4.2">5</a>, <a href="#Part4"><b>10.1</b></a><ul> |
|---|
| 1213 | <li><em>Section 3</em> <a href="#rfc.xref.Part4.1">2</a></li> |
|---|
| 1214 | <li><em>Section 5</em> <a href="#rfc.xref.Part4.2">5</a></li> |
|---|
| [205] | 1215 | </ul> |
|---|
| 1216 | </li> |
|---|
| [1099] | 1217 | <li><em>Part6</em> <a href="#Part6"><b>10.1</b></a>, <a href="#rfc.xref.Part6.1">B.1</a></li> |
|---|
| [52] | 1218 | </ul> |
|---|
| 1219 | </li> |
|---|
| [1099] | 1220 | <li><a id="rfc.index.R" href="#rfc.index.R"><b>R</b></a><ul> |
|---|
| 1221 | <li>Range header <a href="#rfc.xref.header.range.1">3</a>, <a href="#rfc.xref.header.range.2">4.1</a>, <a href="#rfc.xref.header.range.3">4.2</a>, <a href="#rfc.iref.r.1"><b>6.4</b></a>, <a href="#rfc.xref.header.range.4">7.1</a></li> |
|---|
| 1222 | <li><em>RFC2046</em> <a href="#RFC2046"><b>10.1</b></a>, <a href="#rfc.xref.RFC2046.1">A</a>, <a href="#rfc.xref.RFC2046.2">A</a><ul> |
|---|
| 1223 | <li><em>Section 5.1</em> <a href="#rfc.xref.RFC2046.1">A</a></li> |
|---|
| [328] | 1224 | </ul> |
|---|
| 1225 | </li> |
|---|
| [1099] | 1226 | <li><em>RFC2119</em> <a href="#rfc.xref.RFC2119.1">1.1</a>, <a href="#RFC2119"><b>10.1</b></a></li> |
|---|
| 1227 | <li><em>RFC2616</em> <a href="#RFC2616"><b>10.2</b></a>, <a href="#rfc.xref.RFC2616.1">C.1</a></li> |
|---|
| 1228 | <li><em>RFC3864</em> <a href="#rfc.xref.RFC3864.1">7.1</a>, <a href="#RFC3864"><b>10.2</b></a></li> |
|---|
| 1229 | <li><em>RFC4288</em> <a href="#RFC4288"><b>10.2</b></a>, <a href="#rfc.xref.RFC4288.1">A</a></li> |
|---|
| [52] | 1230 | </ul> |
|---|
| 1231 | </li> |
|---|
| [1099] | 1232 | <li><a id="rfc.index.S" href="#rfc.index.S"><b>S</b></a><ul> |
|---|
| 1233 | <li>Status Codes |
|---|
| 1234 | <ul> |
|---|
| 1235 | <li>206 Partial Content <a href="#rfc.iref.s.1"><b>4.1</b></a>, <a href="#rfc.xref.status.206.1">B.1</a>, <a href="#rfc.xref.status.206.2">B.2</a></li> |
|---|
| 1236 | <li>416 Requested Range Not Satisfiable <a href="#rfc.iref.s.2"><b>4.2</b></a>, <a href="#rfc.xref.status.416.1">6.2</a>, <a href="#rfc.xref.status.416.2">B.1</a></li> |
|---|
| [52] | 1237 | </ul> |
|---|
| 1238 | </li> |
|---|
| 1239 | </ul> |
|---|
| 1240 | </li> |
|---|
| 1241 | </ul> |
|---|
| 1242 | </div> |
|---|
| [1099] | 1243 | <h1><a id="rfc.copyright" href="#rfc.copyright">Full Copyright Statement</a></h1> |
|---|
| 1244 | <p>Copyright © The IETF Trust (2008).</p> |
|---|
| 1245 | <p>This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the |
|---|
| 1246 | authors retain all their rights. |
|---|
| 1247 | </p> |
|---|
| 1248 | <p>This document and the information contained herein are provided on an “AS IS” basis and THE CONTRIBUTOR, THE ORGANIZATION |
|---|
| 1249 | HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE |
|---|
| 1250 | DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN |
|---|
| 1251 | WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
|---|
| 1252 | </p> |
|---|
| 1253 | <h1><a id="rfc.ipr" href="#rfc.ipr">Intellectual Property</a></h1> |
|---|
| 1254 | <p>The IETF takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might |
|---|
| 1255 | be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any |
|---|
| 1256 | license under such rights might or might not be available; nor does it represent that it has made any independent effort to |
|---|
| 1257 | identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and |
|---|
| 1258 | BCP 79. |
|---|
| 1259 | </p> |
|---|
| 1260 | <p>Copies of IPR disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result |
|---|
| 1261 | of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users |
|---|
| 1262 | of this specification can be obtained from the IETF on-line IPR repository at <a href="http://www.ietf.org/ipr">http://www.ietf.org/ipr</a>. |
|---|
| 1263 | </p> |
|---|
| 1264 | <p>The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary |
|---|
| 1265 | rights that may cover technology that may be required to implement this standard. Please address the information to the IETF |
|---|
| 1266 | at <a href="mailto:ietf-ipr@ietf.org">ietf-ipr@ietf.org</a>. |
|---|
| 1267 | </p> |
|---|
| [52] | 1268 | </body> |
|---|
| 1269 | </html> |
|---|
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