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| 320 | |
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| 321 | @page { |
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| 322 | @top-left { |
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| 323 | content: "INTERNET DRAFT"; |
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| 324 | } |
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| 325 | @top-right { |
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| 326 | content: "March 2009"; |
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| 327 | } |
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| 328 | @top-center { |
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| 329 | content: "HTTP/1.1, Part 5"; |
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| 330 | } |
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| 331 | @bottom-left { |
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| 332 | content: "Fielding, et al."; |
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| 333 | } |
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| 334 | @bottom-center { |
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| 349 | @top-center { |
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| 350 | content: normal; |
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| 351 | } |
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| 352 | } |
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| 353 | </style><link rel="Contents" href="#rfc.toc"> |
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| 354 | <link rel="Author" href="#rfc.authors"> |
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| 355 | <link rel="Copyright" href="#rfc.copyright"> |
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| 356 | <link rel="Index" href="#rfc.index"> |
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| 357 | <link rel="Chapter" title="1 Introduction" href="#rfc.section.1"> |
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| 358 | <link rel="Chapter" title="2 Range Units" href="#rfc.section.2"> |
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| 359 | <link rel="Chapter" title="3 Status Code Definitions" href="#rfc.section.3"> |
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| 360 | <link rel="Chapter" title="4 Combining Ranges" href="#rfc.section.4"> |
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| 361 | <link rel="Chapter" title="5 Header Field Definitions" href="#rfc.section.5"> |
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| 362 | <link rel="Chapter" title="6 IANA Considerations" href="#rfc.section.6"> |
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| 363 | <link rel="Chapter" title="7 Security Considerations" href="#rfc.section.7"> |
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| 364 | <link rel="Chapter" title="8 Acknowledgments" href="#rfc.section.8"> |
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| 365 | <link rel="Chapter" href="#rfc.section.9" title="9 References"> |
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| 366 | <link rel="Appendix" title="A Internet Media Type multipart/byteranges" href="#rfc.section.A"> |
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| 367 | <link rel="Appendix" title="B Compatibility with Previous Versions" href="#rfc.section.B"> |
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| 368 | <link rel="Appendix" title="C Collected ABNF" href="#rfc.section.C"> |
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| 369 | <link rel="Appendix" title="D Change Log (to be removed by RFC Editor before publication)" href="#rfc.section.D"> |
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| 370 | <meta name="generator" content="http://greenbytes.de/tech/webdav/rfc2629.xslt, Revision 1.424, 2009-02-24 16:15:29, XSLT vendor: SAXON 8.9 from Saxonica http://www.saxonica.com/"> |
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| 371 | <link rel="schema.DC" href="http://purl.org/dc/elements/1.1/"> |
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| 372 | <meta name="DC.Creator" content="Fielding, R."> |
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| 373 | <meta name="DC.Creator" content="Gettys, J."> |
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| 374 | <meta name="DC.Creator" content="Mogul, J."> |
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| 375 | <meta name="DC.Creator" content="Frystyk, H."> |
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| 376 | <meta name="DC.Creator" content="Masinter, L."> |
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| 377 | <meta name="DC.Creator" content="Leach, P."> |
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| 378 | <meta name="DC.Creator" content="Berners-Lee, T."> |
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| 379 | <meta name="DC.Creator" content="Lafon, Y."> |
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| 380 | <meta name="DC.Creator" content="Reschke, J. F."> |
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| 381 | <meta name="DC.Identifier" content="urn:ietf:id:draft-ietf-httpbis-p5-range-latest"> |
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| 382 | <meta name="DC.Date.Issued" scheme="ISO8601" content="2009-03"> |
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| 383 | <meta name="DC.Relation.Replaces" content="urn:ietf:rfc:2616"> |
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| 384 | <meta name="DC.Description.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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| 385 | </head> |
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| 386 | <body> |
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| 387 | <table summary="header information" class="header" border="0" cellpadding="1" cellspacing="1"> |
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| 388 | <tr> |
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| 389 | <td class="header left">HTTPbis Working Group</td> |
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| 390 | <td class="header right">R. Fielding, Editor</td> |
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| 391 | </tr> |
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| 392 | <tr> |
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| 393 | <td class="header left">Internet Draft</td> |
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| 394 | <td class="header right">Day Software</td> |
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| 395 | </tr> |
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| 396 | <tr> |
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| 397 | <td class="header left"> |
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| 398 | <draft-ietf-httpbis-p5-range-latest> |
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| 399 | |
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| 400 | </td> |
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| 401 | <td class="header right">J. Gettys</td> |
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| 402 | </tr> |
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| 403 | <tr> |
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| 404 | <td class="header left">Obsoletes: <a href="http://tools.ietf.org/html/rfc2616">2616</a> (if approved) |
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| 405 | </td> |
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| 406 | <td class="header right">One Laptop per Child</td> |
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| 407 | </tr> |
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| 408 | <tr> |
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| 409 | <td class="header left">Intended status: Standards Track</td> |
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| 410 | <td class="header right">J. Mogul</td> |
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| 411 | </tr> |
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| 412 | <tr> |
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| 413 | <td class="header left">Expires: September 2009</td> |
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| 414 | <td class="header right">HP</td> |
|---|
| 415 | </tr> |
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| 416 | <tr> |
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| 417 | <td class="header left"></td> |
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| 418 | <td class="header right">H. Frystyk</td> |
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| 419 | </tr> |
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| 420 | <tr> |
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| 421 | <td class="header left"></td> |
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| 422 | <td class="header right">Microsoft</td> |
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| 423 | </tr> |
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| 424 | <tr> |
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| 425 | <td class="header left"></td> |
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| 426 | <td class="header right">L. Masinter</td> |
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| 427 | </tr> |
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| 428 | <tr> |
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| 429 | <td class="header left"></td> |
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| 430 | <td class="header right">Adobe Systems</td> |
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| 431 | </tr> |
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| 432 | <tr> |
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| 433 | <td class="header left"></td> |
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| 434 | <td class="header right">P. Leach</td> |
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| 435 | </tr> |
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| 436 | <tr> |
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| 437 | <td class="header left"></td> |
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| 438 | <td class="header right">Microsoft</td> |
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| 439 | </tr> |
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| 440 | <tr> |
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| 441 | <td class="header left"></td> |
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| 442 | <td class="header right">T. Berners-Lee</td> |
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| 443 | </tr> |
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| 444 | <tr> |
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| 445 | <td class="header left"></td> |
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| 446 | <td class="header right">W3C/MIT</td> |
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| 447 | </tr> |
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| 448 | <tr> |
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| 449 | <td class="header left"></td> |
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| 450 | <td class="header right">Y. Lafon, Editor</td> |
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| 451 | </tr> |
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| 452 | <tr> |
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| 453 | <td class="header left"></td> |
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| 454 | <td class="header right">W3C</td> |
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| 455 | </tr> |
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| 456 | <tr> |
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| 457 | <td class="header left"></td> |
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| 458 | <td class="header right">J. F. Reschke, Editor</td> |
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| 459 | </tr> |
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| 460 | <tr> |
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| 461 | <td class="header left"></td> |
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| 462 | <td class="header right">greenbytes</td> |
|---|
| 463 | </tr> |
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| 464 | <tr> |
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| 465 | <td class="header left"></td> |
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| 466 | <td class="header right">March 2, 2009</td> |
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| 467 | </tr> |
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| 468 | </table> |
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| 469 | <p class="title">HTTP/1.1, part 5: Range Requests and Partial Responses<br><span class="filename">draft-ietf-httpbis-p5-range-latest</span></p> |
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| 470 | <h1><a id="rfc.status" href="#rfc.status">Status of this Memo</a></h1> |
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| 471 | <p>This Internet-Draft is submitted to IETF pursuant to, and in full conformance with, the provisions of BCP 78 and BCP 79. This |
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| 472 | document may contain material from IETF Documents or IETF Contributions published or made publicly available before November |
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| 473 | 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to |
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| 474 | allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) |
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| 475 | controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative |
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| 476 | works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate |
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| 477 | it into languages other than English. |
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| 478 | </p> |
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| 479 | <p>Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note |
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| 480 | that other groups may also distribute working documents as Internet-Drafts. |
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| 481 | </p> |
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| 482 | <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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| 483 | 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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| 484 | in progress”. |
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| 485 | </p> |
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| 486 | <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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| 487 | </p> |
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| 488 | <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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| 489 | </p> |
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| 490 | <p>This Internet-Draft will expire in September 2009.</p> |
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| 491 | <h1><a id="rfc.copyrightnotice" href="#rfc.copyrightnotice">Copyright Notice</a></h1> |
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| 492 | <p>Copyright © 2009 IETF Trust and the persons identified as the document authors. All rights reserved.</p> |
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| 493 | <p>This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents in effect on the date |
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| 494 | of publication of this document (<a href="http://trustee.ietf.org/license-info">http://trustee.ietf.org/license-info</a>). Please review these documents carefully, as they describe your rights and restrictions with respect to this document. |
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| 495 | </p> |
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| 496 | <h1 id="rfc.abstract"><a href="#rfc.abstract">Abstract</a></h1> |
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| 497 | <p>The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information |
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| 498 | 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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| 499 | seven-part specification that defines the protocol referred to as "HTTP/1.1" and, taken together, obsoletes RFC 2616. Part |
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| 500 | 5 defines range-specific requests and the rules for constructing and combining responses to those requests. |
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| 501 | </p> |
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| 502 | <h1 id="rfc.note.1"><a href="#rfc.note.1">Editorial Note (To be removed by RFC Editor)</a></h1> |
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| 503 | <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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| 504 | 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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| 505 | </p> |
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| 506 | <p>The changes in this draft are summarized in <a href="#changes.since.05" title="Since draft-ietf-httpbis-p5-range-05">Appendix D.7</a>. |
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| 507 | </p> |
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| 508 | <hr class="noprint"> |
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| 509 | <h1 class="np" id="rfc.toc"><a href="#rfc.toc">Table of Contents</a></h1> |
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| 510 | <ul class="toc"> |
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| 511 | <li class="tocline0">1. <a href="#introduction">Introduction</a><ul class="toc"> |
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| 512 | <li class="tocline1">1.1 <a href="#intro.requirements">Requirements</a></li> |
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| 513 | <li class="tocline1">1.2 <a href="#notation">Syntax Notation</a><ul class="toc"> |
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| 514 | <li class="tocline1">1.2.1 <a href="#core.rules">Core Rules</a></li> |
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| 515 | <li class="tocline1">1.2.2 <a href="#abnf.dependencies">ABNF Rules defined in other Parts of the Specification</a></li> |
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| 516 | </ul> |
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| 517 | </li> |
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| 518 | </ul> |
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| 519 | </li> |
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| 520 | <li class="tocline0">2. <a href="#range.units">Range Units</a></li> |
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| 521 | <li class="tocline0">3. <a href="#rfc.section.3">Status Code Definitions</a><ul class="toc"> |
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| 522 | <li class="tocline1">3.1 <a href="#status.206">206 Partial Content</a></li> |
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| 523 | <li class="tocline1">3.2 <a href="#status.416">416 Requested Range Not Satisfiable</a></li> |
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| 524 | </ul> |
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| 525 | </li> |
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| 526 | <li class="tocline0">4. <a href="#combining.byte.ranges">Combining Ranges</a></li> |
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| 527 | <li class="tocline0">5. <a href="#header.fields">Header Field Definitions</a><ul class="toc"> |
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| 528 | <li class="tocline1">5.1 <a href="#header.accept-ranges">Accept-Ranges</a></li> |
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| 529 | <li class="tocline1">5.2 <a href="#header.content-range">Content-Range</a></li> |
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| 530 | <li class="tocline1">5.3 <a href="#header.if-range">If-Range</a></li> |
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| 531 | <li class="tocline1">5.4 <a href="#header.range">Range</a><ul class="toc"> |
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| 532 | <li class="tocline1">5.4.1 <a href="#byte.ranges">Byte Ranges</a></li> |
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| 533 | <li class="tocline1">5.4.2 <a href="#range.retrieval.requests">Range Retrieval Requests</a></li> |
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| 534 | </ul> |
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| 535 | </li> |
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| 536 | </ul> |
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| 537 | </li> |
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| 538 | <li class="tocline0">6. <a href="#IANA.considerations">IANA Considerations</a><ul class="toc"> |
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| 539 | <li class="tocline1">6.1 <a href="#message.header.registration">Message Header Registration</a></li> |
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| 540 | </ul> |
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| 541 | </li> |
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| 542 | <li class="tocline0">7. <a href="#security.considerations">Security Considerations</a></li> |
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| 543 | <li class="tocline0">8. <a href="#ack">Acknowledgments</a></li> |
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| 544 | <li class="tocline0">9. <a href="#rfc.references">References</a><ul class="toc"> |
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| 545 | <li class="tocline1">9.1 <a href="#rfc.references.1">Normative References</a></li> |
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| 546 | <li class="tocline1">9.2 <a href="#rfc.references.2">Informative References</a></li> |
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| 547 | </ul> |
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| 548 | </li> |
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| 549 | <li class="tocline0"><a href="#rfc.authors">Authors' Addresses</a></li> |
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| 550 | <li class="tocline0">A. <a href="#internet.media.type.multipart.byteranges">Internet Media Type multipart/byteranges</a></li> |
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| 551 | <li class="tocline0">B. <a href="#compatibility">Compatibility with Previous Versions</a><ul class="toc"> |
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| 552 | <li class="tocline1">B.1 <a href="#changes.from.rfc.2068">Changes from RFC 2068</a></li> |
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| 553 | <li class="tocline1">B.2 <a href="#changes.from.rfc.2616">Changes from RFC 2616</a></li> |
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| 554 | </ul> |
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| 555 | </li> |
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| 556 | <li class="tocline0">C. <a href="#collected.abnf">Collected ABNF</a></li> |
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| 557 | <li class="tocline0">D. <a href="#change.log">Change Log (to be removed by RFC Editor before publication)</a><ul class="toc"> |
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| 558 | <li class="tocline1">D.1 <a href="#rfc.section.D.1">Since RFC2616</a></li> |
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| 559 | <li class="tocline1">D.2 <a href="#rfc.section.D.2">Since draft-ietf-httpbis-p5-range-00</a></li> |
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| 560 | <li class="tocline1">D.3 <a href="#rfc.section.D.3">Since draft-ietf-httpbis-p5-range-01</a></li> |
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| 561 | <li class="tocline1">D.4 <a href="#changes.since.02">Since draft-ietf-httpbis-p5-range-02</a></li> |
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| 562 | <li class="tocline1">D.5 <a href="#changes.since.03">Since draft-ietf-httpbis-p5-range-03</a></li> |
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| 563 | <li class="tocline1">D.6 <a href="#changes.since.04">Since draft-ietf-httpbis-p5-range-04</a></li> |
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| 564 | <li class="tocline1">D.7 <a href="#changes.since.05">Since draft-ietf-httpbis-p5-range-05</a></li> |
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| 565 | </ul> |
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| 566 | </li> |
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| 567 | <li class="tocline0"><a href="#rfc.index">Index</a></li> |
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| 568 | </ul> |
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| 569 | <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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| 570 | <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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| 571 | has stored a partial representation, it is desirable to request the remainder of that representation in a subsequent request |
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| 572 | rather than transfer the entire representation. There are also a number of Web applications that benefit from being able to |
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| 573 | request only a subset of a larger representation, such as a single page of a very large document or only part of an image |
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| 574 | to be rendered by a device with limited local storage. |
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| 575 | </p> |
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| 576 | <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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| 577 | 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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| 578 | request without impacting interoperability. Partial responses are indicated by a distinct status code to not be mistaken for |
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| 579 | full responses by intermediate caches that might not implement the feature. |
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| 580 | </p> |
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| 581 | <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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| 582 | requests for byte ranges. |
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| 583 | </p> |
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| 584 | <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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| 585 | <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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| 586 | 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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| 587 | </p> |
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| 588 | <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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| 589 | </p> |
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| 590 | <h2 id="rfc.section.1.2"><a href="#rfc.section.1.2">1.2</a> <a id="notation" href="#notation">Syntax Notation</a></h2> |
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| 591 | <p id="rfc.section.1.2.p.1">This specification uses the ABNF syntax defined in <a href="p1-messaging.html#notation" title="Syntax Notation">Section 1.2</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>. The following core rules are included by reference, as defined in <a href="#RFC5234" id="rfc.xref.RFC5234.1"><cite title="Augmented BNF for Syntax Specifications: ABNF">[RFC5234]</cite></a>, <a href="http://tools.ietf.org/html/rfc5234#appendix-B.1">Appendix B.1</a>: ALPHA (letters), CR (carriage return), CRLF (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double quote), HEXDIG |
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| 592 | (hexadecimal 0-9/A-F/a-f), LF (line feed), OCTET (any 8-bit sequence of data), SP (space), VCHAR (any visible USASCII character), |
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| 593 | and WSP (whitespace). |
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| 594 | </p> |
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| 595 | <h3 id="rfc.section.1.2.1"><a href="#rfc.section.1.2.1">1.2.1</a> <a id="core.rules" href="#core.rules">Core Rules</a></h3> |
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| 596 | <p id="rfc.section.1.2.1.p.1">The core rules below are defined in <a href="p1-messaging.html#basic.rules" title="Basic Rules">Section 1.2.2</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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| 597 | </p> |
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| 598 | <div id="rfc.figure.u.1"></div><pre class="inline"> <a href="#core.rules" class="smpl">token</a> = <token, 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 1.2.2</a>> |
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| 599 | <a href="#core.rules" class="smpl">OWS</a> = <OWS, 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 1.2.2</a>> |
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| 600 | </pre><h3 id="rfc.section.1.2.2"><a href="#rfc.section.1.2.2">1.2.2</a> <a id="abnf.dependencies" href="#abnf.dependencies">ABNF Rules defined in other Parts of the Specification</a></h3> |
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| 601 | <p id="rfc.section.1.2.2.p.1">The ABNF rules below are defined in other parts:</p> |
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| 602 | <div id="rfc.figure.u.2"></div><pre class="inline"> <a href="#abnf.dependencies" class="smpl">HTTP-date</a> = <HTTP-date, 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#full.date" title="Full Date">Section 3.2.1</a>> |
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| 603 | </pre><div id="rfc.figure.u.3"></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 2</a>> |
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| 604 | </pre><h1 id="rfc.section.2"><a href="#rfc.section.2">2.</a> <a id="range.units" href="#range.units">Range Units</a></h1> |
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| 605 | <p id="rfc.section.2.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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| 606 | uses range units in the Range (<a href="#header.range" id="rfc.xref.header.range.1" title="Range">Section 5.4</a>) and Content-Range (<a href="#header.content-range" id="rfc.xref.header.content-range.1" title="Content-Range">Section 5.2</a>) header fields. An entity can be broken down into subranges according to various structural units. |
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| 607 | </p> |
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| 608 | <div id="rfc.figure.u.4"></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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| 609 | <a href="#range.units" class="smpl">bytes-unit</a> = "bytes" |
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| 610 | <a href="#range.units" class="smpl">other-range-unit</a> = <a href="#core.rules" class="smpl">token</a> |
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| 611 | </pre><p id="rfc.section.2.p.3">HTTP/1.1 has been designed to allow implementations of applications that do not depend on knowledge of ranges. The only range |
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| 612 | unit defined by HTTP/1.1 is "bytes". |
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| 613 | </p> |
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| 614 | <p id="rfc.section.2.p.4">If a range unit is not understood in a request, a server <em class="bcp14">MUST</em> ignore the whole Range header (<a href="#header.range" id="rfc.xref.header.range.2" title="Range">Section 5.4</a>). If a range unit is not understood in a response, an intermediary <em class="bcp14">SHOULD</em> pass the response to the client; a client <em class="bcp14">MUST</em> fail. |
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| 615 | </p> |
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| 616 | <h1 id="rfc.section.3"><a href="#rfc.section.3">3.</a> Status Code Definitions |
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| 617 | </h1> |
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| 618 | <div id="rfc.iref.3"></div> |
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| 619 | <div id="rfc.iref.s.1"></div> |
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| 620 | <h2 id="rfc.section.3.1"><a href="#rfc.section.3.1">3.1</a> <a id="status.206" href="#status.206">206 Partial Content</a></h2> |
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| 621 | <p id="rfc.section.3.1.p.1">The server has fulfilled the partial GET request for the resource. The request <em class="bcp14">MUST</em> have included a Range header field (<a href="#header.range" id="rfc.xref.header.range.3" title="Range">Section 5.4</a>) indicating the desired range, and <em class="bcp14">MAY</em> have included an If-Range header field (<a href="#header.if-range" id="rfc.xref.header.if-range.1" title="If-Range">Section 5.3</a>) to make the request conditional. |
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| 622 | </p> |
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| 623 | <p id="rfc.section.3.1.p.2">The response <em class="bcp14">MUST</em> include the following header fields: |
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| 624 | </p> |
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| 625 | <ul> |
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| 626 | <li>Either a Content-Range header field (<a href="#header.content-range" id="rfc.xref.header.content-range.2" title="Content-Range">Section 5.2</a>) indicating the range included with this response, or a multipart/byteranges Content-Type including Content-Range fields |
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| 627 | 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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| 628 | </li> |
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| 629 | <li>Date</li> |
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| 630 | <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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| 631 | <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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| 632 | variant |
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| 633 | </li> |
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| 634 | </ul> |
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| 635 | <p id="rfc.section.3.1.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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| 636 | </p> |
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| 637 | <p id="rfc.section.3.1.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 Ranges">Section 4</a>. |
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| 638 | </p> |
|---|
| 639 | <p id="rfc.section.3.1.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. Furthermore, if a response uses a range unit that is not understood by the cache, then |
|---|
| 640 | it <em class="bcp14">MUST NOT</em> be cached either. |
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| 641 | </p> |
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| 642 | <div id="rfc.iref.4"></div> |
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| 643 | <div id="rfc.iref.s.2"></div> |
|---|
| 644 | <h2 id="rfc.section.3.2"><a href="#rfc.section.3.2">3.2</a> <a id="status.416" href="#status.416">416 Requested Range Not Satisfiable</a></h2> |
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| 645 | <p id="rfc.section.3.2.p.1">A server <em class="bcp14">SHOULD</em> return a response with this status code if a request included a Range request-header field (<a href="#header.range" id="rfc.xref.header.range.4" title="Range">Section 5.4</a>), and none of the ranges-specifier values in this field overlap the current extent of the selected resource, and the request |
|---|
| 646 | 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 |
|---|
| 647 | values were greater than the current length of the selected resource.) |
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| 648 | </p> |
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| 649 | <p id="rfc.section.3.2.p.2">When this status code is returned for a byte-range request, the response <em class="bcp14">SHOULD</em> include a 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 5.2</a>). This response <em class="bcp14">MUST NOT</em> use the multipart/byteranges content-type. |
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| 650 | </p> |
|---|
| 651 | <h1 id="rfc.section.4"><a href="#rfc.section.4">4.</a> <a id="combining.byte.ranges" href="#combining.byte.ranges">Combining Ranges</a></h1> |
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| 652 | <p id="rfc.section.4.p.1">A response might transfer only a subrange of an entity-body, either the request included one or more Range specifications, |
|---|
| 653 | or because a connection was broken prematurely. After several such transfers, a cache might have received several ranges of |
|---|
| 654 | the same entity-body. |
|---|
| 655 | </p> |
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| 656 | <p id="rfc.section.4.p.2">If a cache has a stored non-empty set of subranges for an entity, and an incoming response transfers another subrange, the |
|---|
| 657 | cache <em class="bcp14">MAY</em> combine the new subrange with the existing set if both the following conditions are met: |
|---|
| 658 | </p> |
|---|
| 659 | <ul> |
|---|
| 660 | <li>Both the incoming response and the cache entry have a cache validator.</li> |
|---|
| 661 | <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 4</a> of <a href="#Part4" id="rfc.xref.Part4.2"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>). |
|---|
| 662 | </li> |
|---|
| 663 | </ul> |
|---|
| 664 | <p id="rfc.section.4.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 |
|---|
| 665 | response if these values are equal or missing), and <em class="bcp14">MUST</em> discard the other partial information. |
|---|
| 666 | </p> |
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| 667 | <h1 id="rfc.section.5"><a href="#rfc.section.5">5.</a> <a id="header.fields" href="#header.fields">Header Field Definitions</a></h1> |
|---|
| 668 | <p id="rfc.section.5.p.1">This section defines the syntax and semantics of HTTP/1.1 header fields related to range requests and partial responses.</p> |
|---|
| 669 | <p id="rfc.section.5.p.2">For entity-header fields, both sender and recipient refer to either the client or the server, depending on who sends and who |
|---|
| 670 | receives the entity. |
|---|
| 671 | </p> |
|---|
| 672 | <div id="rfc.iref.a.1"></div> |
|---|
| 673 | <div id="rfc.iref.h.1"></div> |
|---|
| 674 | <h2 id="rfc.section.5.1"><a href="#rfc.section.5.1">5.1</a> <a id="header.accept-ranges" href="#header.accept-ranges">Accept-Ranges</a></h2> |
|---|
| 675 | <p id="rfc.section.5.1.p.1">The response-header "Accept-Ranges" field allows the server to indicate its acceptance of range requests for a resource:</p> |
|---|
| 676 | <div id="rfc.figure.u.5"></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="#core.rules" class="smpl">OWS</a> <a href="#header.accept-ranges" class="smpl">Accept-Ranges-v</a> |
|---|
| 677 | <a href="#header.accept-ranges" class="smpl">Accept-Ranges-v</a> = <a href="#header.accept-ranges" class="smpl">acceptable-ranges</a> |
|---|
| 678 | <a href="#header.accept-ranges" class="smpl">acceptable-ranges</a> = 1#<a href="#range.units" class="smpl">range-unit</a> / "none" |
|---|
| 679 | </pre><p id="rfc.section.5.1.p.3">Origin servers that accept byte-range requests <em class="bcp14">MAY</em> send |
|---|
| 680 | </p> |
|---|
| 681 | <div id="rfc.figure.u.6"></div><pre class="text"> Accept-Ranges: bytes |
|---|
| 682 | </pre><p id="rfc.section.5.1.p.5">but are not required to do so. Clients <em class="bcp14">MAY</em> generate range requests without having received this header for the resource involved. Range units are defined in <a href="#range.units" title="Range Units">Section 2</a>. |
|---|
| 683 | </p> |
|---|
| 684 | <p id="rfc.section.5.1.p.6">Servers that do not accept any kind of range request for a resource <em class="bcp14">MAY</em> send |
|---|
| 685 | </p> |
|---|
| 686 | <div id="rfc.figure.u.7"></div><pre class="text"> Accept-Ranges: none |
|---|
| 687 | </pre><p id="rfc.section.5.1.p.8">to advise the client not to attempt a range request.</p> |
|---|
| 688 | <div id="rfc.iref.c.1"></div> |
|---|
| 689 | <div id="rfc.iref.h.2"></div> |
|---|
| 690 | <h2 id="rfc.section.5.2"><a href="#rfc.section.5.2">5.2</a> <a id="header.content-range" href="#header.content-range">Content-Range</a></h2> |
|---|
| 691 | <p id="rfc.section.5.2.p.1">The entity-header "Content-Range" is sent with a partial entity-body to specify where in the full entity-body the partial |
|---|
| 692 | body should be applied. Range units are defined in <a href="#range.units" title="Range Units">Section 2</a>. |
|---|
| 693 | </p> |
|---|
| 694 | <div id="rfc.figure.u.8"></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="#core.rules" class="smpl">OWS</a> <a href="#header.content-range" class="smpl">Content-Range-v</a> |
|---|
| 695 | <a href="#header.content-range" class="smpl">Content-Range-v</a> = <a href="#header.content-range" class="smpl">content-range-spec</a> |
|---|
| 696 | |
|---|
| 697 | <a href="#header.content-range" class="smpl">content-range-spec</a> = <a href="#header.content-range" class="smpl">byte-content-range-spec</a> |
|---|
| 698 | / <a href="#header.content-range" class="smpl">other-content-range-spec</a> |
|---|
| 699 | <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> |
|---|
| 700 | <a href="#header.content-range" class="smpl">byte-range-resp-spec</a> "/" |
|---|
| 701 | ( <a href="#header.content-range" class="smpl">instance-length</a> / "*" ) |
|---|
| 702 | |
|---|
| 703 | <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>) |
|---|
| 704 | / "*" |
|---|
| 705 | |
|---|
| 706 | <a href="#header.content-range" class="smpl">instance-length</a> = 1*<a href="#notation" class="smpl">DIGIT</a> |
|---|
| 707 | |
|---|
| 708 | <a href="#header.content-range" class="smpl">other-content-range-spec</a> = <a href="#range.units" class="smpl">other-range-unit</a> <a href="#notation" class="smpl">SP</a> |
|---|
| 709 | <a href="#header.content-range" class="smpl">other-range-resp-spec</a> |
|---|
| 710 | <a href="#header.content-range" class="smpl">other-range-resp-spec</a> = *<a href="#notation" class="smpl">CHAR</a> |
|---|
| 711 | </pre><p id="rfc.section.5.2.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 "*" |
|---|
| 712 | character means that the instance-length is unknown at the time when the response was generated. |
|---|
| 713 | </p> |
|---|
| 714 | <p id="rfc.section.5.2.p.4">Unlike byte-ranges-specifier values (see <a href="#byte.ranges" title="Byte Ranges">Section 5.4.1</a>), a byte-range-resp-spec <em class="bcp14">MUST</em> only specify one range, and <em class="bcp14">MUST</em> contain absolute byte positions for both the first and last byte of the range. |
|---|
| 715 | </p> |
|---|
| 716 | <p id="rfc.section.5.2.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 |
|---|
| 717 | 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. |
|---|
| 718 | </p> |
|---|
| 719 | <p id="rfc.section.5.2.p.6">In the case of a byte range request: 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 |
|---|
| 720 | selected resource as a decimal number. 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 "*". |
|---|
| 721 | </p> |
|---|
| 722 | <p id="rfc.section.5.2.p.7">Examples of byte-content-range-spec values, assuming that the entity contains a total of 1234 bytes: </p> |
|---|
| 723 | <ul> |
|---|
| 724 | <li>The first 500 bytes: |
|---|
| 725 | <div id="rfc.figure.u.9"></div><pre class="text"> bytes 0-499/1234 |
|---|
| 726 | </pre> </li> |
|---|
| 727 | <li>The second 500 bytes: |
|---|
| 728 | <div id="rfc.figure.u.10"></div><pre class="text"> bytes 500-999/1234 |
|---|
| 729 | </pre> </li> |
|---|
| 730 | <li>All except for the first 500 bytes: |
|---|
| 731 | <div id="rfc.figure.u.11"></div><pre class="text"> bytes 500-1233/1234 |
|---|
| 732 | </pre> </li> |
|---|
| 733 | <li>The last 500 bytes: |
|---|
| 734 | <div id="rfc.figure.u.12"></div><pre class="text"> bytes 734-1233/1234 |
|---|
| 735 | </pre> </li> |
|---|
| 736 | </ul> |
|---|
| 737 | <p id="rfc.section.5.2.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 |
|---|
| 738 | a request for a set of ranges that overlap without any holes), this content is transmitted with a Content-Range header, and |
|---|
| 739 | a Content-Length header showing the number of bytes actually transferred. For example, |
|---|
| 740 | </p> |
|---|
| 741 | <div id="rfc.figure.u.13"></div><pre class="text"> HTTP/1.1 206 Partial Content |
|---|
| 742 | Date: Wed, 15 Nov 1995 06:25:24 GMT |
|---|
| 743 | Last-Modified: Wed, 15 Nov 1995 04:58:08 GMT |
|---|
| 744 | Content-Range: bytes 21010-47021/47022 |
|---|
| 745 | Content-Length: 26012 |
|---|
| 746 | Content-Type: image/gif |
|---|
| 747 | </pre><p id="rfc.section.5.2.p.10">When an HTTP message includes the content of multiple ranges (for example, a response to a request for multiple non-overlapping |
|---|
| 748 | ranges), these are transmitted as a multipart message. The multipart media type used for this purpose is "multipart/byteranges" |
|---|
| 749 | 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. |
|---|
| 750 | </p> |
|---|
| 751 | <p id="rfc.section.5.2.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 ranges in a single request. |
|---|
| 752 | </p> |
|---|
| 753 | <p id="rfc.section.5.2.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. |
|---|
| 754 | </p> |
|---|
| 755 | <p id="rfc.section.5.2.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 |
|---|
| 756 | the full entity). |
|---|
| 757 | </p> |
|---|
| 758 | <p id="rfc.section.5.2.p.14">If the server receives a request (other than one including an If-Range request-header field) with an unsatisfiable Range request-header |
|---|
| 759 | field (that is, all of whose byte-range-spec values have a first-byte-pos value greater than the current length of the selected |
|---|
| 760 | 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 3.2</a>). |
|---|
| 761 | </p> |
|---|
| 762 | <dl class="empty"> |
|---|
| 763 | <dd> <b>Note:</b> clients cannot depend on servers to send a 416 (Requested range not satisfiable) response instead of a 200 (OK) response for |
|---|
| 764 | an unsatisfiable Range request-header, since not all servers implement this request-header. |
|---|
| 765 | </dd> |
|---|
| 766 | </dl> |
|---|
| 767 | <div id="rfc.iref.i.1"></div> |
|---|
| 768 | <div id="rfc.iref.h.3"></div> |
|---|
| 769 | <h2 id="rfc.section.5.3"><a href="#rfc.section.5.3">5.3</a> <a id="header.if-range" href="#header.if-range">If-Range</a></h2> |
|---|
| 770 | <p id="rfc.section.5.3.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 |
|---|
| 771 | cache, it could use the Range request-header with a conditional GET (using either or both of If-Unmodified-Since and If-Match.) |
|---|
| 772 | However, if the condition fails because the entity has been modified, the client would then have to make a second request |
|---|
| 773 | to obtain the entire current entity-body. |
|---|
| 774 | </p> |
|---|
| 775 | <p id="rfc.section.5.3.p.2">The request header "If-Range" allows a client to "short-circuit" the second request. Informally, its meaning is `if the entity |
|---|
| 776 | is unchanged, send me the part(s) that I am missing; otherwise, send me the entire new entity'. |
|---|
| 777 | </p> |
|---|
| 778 | <div id="rfc.figure.u.14"></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="#core.rules" class="smpl">OWS</a> <a href="#header.if-range" class="smpl">If-Range-v</a> |
|---|
| 779 | <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> |
|---|
| 780 | </pre><p id="rfc.section.5.3.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 |
|---|
| 781 | 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. |
|---|
| 782 | </p> |
|---|
| 783 | <p id="rfc.section.5.3.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 |
|---|
| 784 | the server <em class="bcp14">SHOULD</em> return the entire entity using a 200 (OK) response. |
|---|
| 785 | </p> |
|---|
| 786 | <div id="rfc.iref.r.1"></div> |
|---|
| 787 | <div id="rfc.iref.h.4"></div> |
|---|
| 788 | <h2 id="rfc.section.5.4"><a href="#rfc.section.5.4">5.4</a> <a id="header.range" href="#header.range">Range</a></h2> |
|---|
| 789 | <h3 id="rfc.section.5.4.1"><a href="#rfc.section.5.4.1">5.4.1</a> <a id="byte.ranges" href="#byte.ranges">Byte Ranges</a></h3> |
|---|
| 790 | <p id="rfc.section.5.4.1.p.1">Since all HTTP entities are represented in HTTP messages as sequences of bytes, the concept of a byte range is meaningful |
|---|
| 791 | for any HTTP entity. (However, not all clients and servers need to support byte-range operations.) |
|---|
| 792 | </p> |
|---|
| 793 | <p id="rfc.section.5.4.1.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> |
|---|
| 794 | <div id="rule.ranges-specifier"> |
|---|
| 795 | <p id="rfc.section.5.4.1.p.3"> A byte range operation <em class="bcp14">MAY</em> specify a single range of bytes, or a set of ranges within a single entity. |
|---|
| 796 | </p> |
|---|
| 797 | </div> |
|---|
| 798 | <div id="rfc.figure.u.15"></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">byte-ranges-specifier</a> = <a href="#range.units" class="smpl">bytes-unit</a> "=" <a href="#rule.ranges-specifier" class="smpl">byte-range-set</a> |
|---|
| 799 | <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> ) |
|---|
| 800 | <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> ] |
|---|
| 801 | <a href="#rule.ranges-specifier" class="smpl">first-byte-pos</a> = 1*<a href="#notation" class="smpl">DIGIT</a> |
|---|
| 802 | <a href="#rule.ranges-specifier" class="smpl">last-byte-pos</a> = 1*<a href="#notation" class="smpl">DIGIT</a> |
|---|
| 803 | </pre><p id="rfc.section.5.4.1.p.5">The first-byte-pos value in a byte-range-spec gives the byte-offset of the first byte in a range. The last-byte-pos value |
|---|
| 804 | gives the byte-offset of the last byte in the range; that is, the byte positions specified are inclusive. Byte offsets are |
|---|
| 805 | decimal and start at zero. |
|---|
| 806 | </p> |
|---|
| 807 | <p id="rfc.section.5.4.1.p.6">If the last-byte-pos value is present, it <em class="bcp14">MUST</em> be greater than or equal to the first-byte-pos in that byte-range-spec, or the byte-range-spec is syntactically invalid. The |
|---|
| 808 | 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. |
|---|
| 809 | </p> |
|---|
| 810 | <p id="rfc.section.5.4.1.p.7">If the last-byte-pos value is absent, or if the value is greater than or equal to the current length of the entity-body, last-byte-pos |
|---|
| 811 | is taken to be equal to one less than the current length of the entity-body in bytes. |
|---|
| 812 | </p> |
|---|
| 813 | <p id="rfc.section.5.4.1.p.8">By its choice of last-byte-pos, a client can limit the number of bytes retrieved without knowing the size of the entity.</p> |
|---|
| 814 | <div id="rfc.figure.u.16"></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> |
|---|
| 815 | <a href="#rule.ranges-specifier" class="smpl">suffix-length</a> = 1*<a href="#notation" class="smpl">DIGIT</a> |
|---|
| 816 | </pre><p id="rfc.section.5.4.1.p.10">A suffix-byte-range-spec is used to specify the suffix of the entity-body, of a length given by the decimal suffix-length |
|---|
| 817 | value. (That is, this form specifies the last N bytes of an entity-body.) If the entity is shorter than the specified suffix-length, |
|---|
| 818 | the entire entity-body is used. |
|---|
| 819 | </p> |
|---|
| 820 | <p id="rfc.section.5.4.1.p.11">If a syntactically valid byte-range-set includes at least one byte-range-spec whose first-byte-pos is less than the current |
|---|
| 821 | 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 |
|---|
| 822 | 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. |
|---|
| 823 | </p> |
|---|
| 824 | <p id="rfc.section.5.4.1.p.12">Examples of byte-ranges-specifier values (assuming an entity-body of length 10000): </p> |
|---|
| 825 | <ul> |
|---|
| 826 | <li>The first 500 bytes (byte offsets 0-499, inclusive): bytes=0-499</li> |
|---|
| 827 | <li>The second 500 bytes (byte offsets 500-999, inclusive): bytes=500-999</li> |
|---|
| 828 | <li>The final 500 bytes (byte offsets 9500-9999, inclusive): bytes=-500</li> |
|---|
| 829 | <li>Or bytes=9500-</li> |
|---|
| 830 | <li>The first and last bytes only (bytes 0 and 9999): bytes=0-0,-1</li> |
|---|
| 831 | <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 |
|---|
| 832 | </li> |
|---|
| 833 | </ul> |
|---|
| 834 | <h3 id="rfc.section.5.4.2"><a href="#rfc.section.5.4.2">5.4.2</a> <a id="range.retrieval.requests" href="#range.retrieval.requests">Range Retrieval Requests</a></h3> |
|---|
| 835 | <p id="rfc.section.5.4.2.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 |
|---|
| 836 | to the entity returned as the result of the request: |
|---|
| 837 | </p> |
|---|
| 838 | <div id="rfc.figure.u.17"></div><pre class="inline"><span id="rfc.iref.g.23"></span> <a href="#range.retrieval.requests" class="smpl">Range</a> = "Range" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#range.retrieval.requests" class="smpl">Range-v</a> |
|---|
| 839 | <a href="#range.retrieval.requests" class="smpl">Range-v</a> = <a href="#rule.ranges-specifier" class="smpl">byte-ranges-specifier</a> |
|---|
| 840 | / <a href="#rule.ranges-specifier" class="smpl">other-ranges-specifier</a> |
|---|
| 841 | <a href="#rule.ranges-specifier" class="smpl">other-ranges-specifier</a> = 1*<a href="#notation" class="smpl">CHAR</a> |
|---|
| 842 | </pre><p id="rfc.section.5.4.2.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, |
|---|
| 843 | since Range supports efficient recovery from partially failed transfers, and supports efficient partial retrieval of large |
|---|
| 844 | entities. |
|---|
| 845 | </p> |
|---|
| 846 | <p id="rfc.section.5.4.2.p.4">If the server supports the Range header and the specified range or ranges are appropriate for the entity: </p> |
|---|
| 847 | <ul> |
|---|
| 848 | <li>The presence of a Range header in an unconditional GET modifies what is returned if the GET is otherwise successful. In other |
|---|
| 849 | words, the response carries a status code of 206 (Partial Content) instead of 200 (OK). |
|---|
| 850 | </li> |
|---|
| 851 | <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 |
|---|
| 852 | one or both of If-Unmodified-Since and If-Match) modifies what is returned if the GET is otherwise successful and the condition |
|---|
| 853 | is true. It does not affect the 304 (Not Modified) response returned if the conditional is false. |
|---|
| 854 | </li> |
|---|
| 855 | </ul> |
|---|
| 856 | <p id="rfc.section.5.4.2.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 5.3</a>) in addition to the Range header. |
|---|
| 857 | </p> |
|---|
| 858 | <p id="rfc.section.5.4.2.p.6">If a proxy that supports ranges receives a Range request, forwards the request to an inbound server, and receives an entire |
|---|
| 859 | 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. |
|---|
| 860 | </p> |
|---|
| 861 | <h1 id="rfc.section.6"><a href="#rfc.section.6">6.</a> <a id="IANA.considerations" href="#IANA.considerations">IANA Considerations</a></h1> |
|---|
| 862 | <h2 id="rfc.section.6.1"><a href="#rfc.section.6.1">6.1</a> <a id="message.header.registration" href="#message.header.registration">Message Header Registration</a></h2> |
|---|
| 863 | <p id="rfc.section.6.1.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>): |
|---|
| 864 | </p> |
|---|
| 865 | <div id="rfc.table.1"> |
|---|
| 866 | <div id="iana.header.registration.table"></div> |
|---|
| 867 | <table summary="" class="tt full" cellpadding="3" cellspacing="0"> |
|---|
| 868 | <thead> |
|---|
| 869 | <tr> |
|---|
| 870 | <th>Header Field Name</th> |
|---|
| 871 | <th>Protocol</th> |
|---|
| 872 | <th>Status</th> |
|---|
| 873 | <th>Reference</th> |
|---|
| 874 | </tr> |
|---|
| 875 | </thead> |
|---|
| 876 | <tbody> |
|---|
| 877 | <tr> |
|---|
| 878 | <td>Accept-Ranges</td> |
|---|
| 879 | <td>http</td> |
|---|
| 880 | <td>standard</td> |
|---|
| 881 | <td> <a href="#header.accept-ranges" id="rfc.xref.header.accept-ranges.1" title="Accept-Ranges">Section 5.1</a> |
|---|
| 882 | </td> |
|---|
| 883 | </tr> |
|---|
| 884 | <tr> |
|---|
| 885 | <td>Content-Range</td> |
|---|
| 886 | <td>http</td> |
|---|
| 887 | <td>standard</td> |
|---|
| 888 | <td> <a href="#header.content-range" id="rfc.xref.header.content-range.4" title="Content-Range">Section 5.2</a> |
|---|
| 889 | </td> |
|---|
| 890 | </tr> |
|---|
| 891 | <tr> |
|---|
| 892 | <td>If-Range</td> |
|---|
| 893 | <td>http</td> |
|---|
| 894 | <td>standard</td> |
|---|
| 895 | <td> <a href="#header.if-range" id="rfc.xref.header.if-range.3" title="If-Range">Section 5.3</a> |
|---|
| 896 | </td> |
|---|
| 897 | </tr> |
|---|
| 898 | <tr> |
|---|
| 899 | <td>Range</td> |
|---|
| 900 | <td>http</td> |
|---|
| 901 | <td>standard</td> |
|---|
| 902 | <td> <a href="#header.range" id="rfc.xref.header.range.5" title="Range">Section 5.4</a> |
|---|
| 903 | </td> |
|---|
| 904 | </tr> |
|---|
| 905 | </tbody> |
|---|
| 906 | </table> |
|---|
| 907 | </div> |
|---|
| 908 | <p id="rfc.section.6.1.p.2">The change controller is: "IETF (iesg@ietf.org) - Internet Engineering Task Force".</p> |
|---|
| 909 | <h1 id="rfc.section.7"><a href="#rfc.section.7">7.</a> <a id="security.considerations" href="#security.considerations">Security Considerations</a></h1> |
|---|
| 910 | <p id="rfc.section.7.p.1">No additional security considerations have been identified beyond those applicable to HTTP in general <a href="#Part1" id="rfc.xref.Part1.6"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. |
|---|
| 911 | </p> |
|---|
| 912 | <h1 id="rfc.section.8"><a href="#rfc.section.8">8.</a> <a id="ack" href="#ack">Acknowledgments</a></h1> |
|---|
| 913 | <p id="rfc.section.8.p.1">Most of the specification of ranges is based on work originally done by Ari Luotonen and John Franks, with additional input |
|---|
| 914 | from Steve Zilles, Daniel W. Connolly, Roy T. Fielding, Jim Gettys, Martin Hamilton, Koen Holtman, Shel Kaplan, Paul Leach, |
|---|
| 915 | Alex Lopez-Ortiz, Larry Masinter, Jeff Mogul, Lou Montulli, David W. Morris, Luigi Rizzo, and Bill Weihl. |
|---|
| 916 | </p> |
|---|
| 917 | <h1 id="rfc.references"><a id="rfc.section.9" href="#rfc.section.9">9.</a> References |
|---|
| 918 | </h1> |
|---|
| 919 | <h2 id="rfc.references.1"><a href="#rfc.section.9.1" id="rfc.section.9.1">9.1</a> Normative References |
|---|
| 920 | </h2> |
|---|
| 921 | <table summary="Normative References"> |
|---|
| 922 | <tr> |
|---|
| 923 | <td class="reference"><b id="Part1">[Part1]</b></td> |
|---|
| 924 | <td class="top"><a title="Day Software">Fielding, R., Ed.</a>, <a title="One Laptop per Child">Gettys, J.</a>, <a title="Hewlett-Packard Company">Mogul, J.</a>, <a title="Microsoft Corporation">Frystyk, H.</a>, <a title="Adobe Systems, Incorporated">Masinter, L.</a>, <a title="Microsoft Corporation">Leach, P.</a>, <a title="World Wide Web Consortium">Berners-Lee, T.</a>, <a title="World Wide Web Consortium">Lafon, Y., Ed.</a>, and <a title="greenbytes GmbH">J. F. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p1-messaging-latest">HTTP/1.1, part 1: URIs, Connections, and Message Parsing</a>”, Internet-Draft draft-ietf-httpbis-p1-messaging-latest (work in progress), March 2009. |
|---|
| 925 | </td> |
|---|
| 926 | </tr> |
|---|
| 927 | <tr> |
|---|
| 928 | <td class="reference"><b id="Part3">[Part3]</b></td> |
|---|
| 929 | <td class="top"><a title="Day Software">Fielding, R., Ed.</a>, <a title="One Laptop per Child">Gettys, J.</a>, <a title="Hewlett-Packard Company">Mogul, J.</a>, <a title="Microsoft Corporation">Frystyk, H.</a>, <a title="Adobe Systems, Incorporated">Masinter, L.</a>, <a title="Microsoft Corporation">Leach, P.</a>, <a title="World Wide Web Consortium">Berners-Lee, T.</a>, <a title="World Wide Web Consortium">Lafon, Y., Ed.</a>, and <a title="greenbytes GmbH">J. F. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p3-payload-latest">HTTP/1.1, part 3: Message Payload and Content Negotiation</a>”, Internet-Draft draft-ietf-httpbis-p3-payload-latest (work in progress), March 2009. |
|---|
| 930 | </td> |
|---|
| 931 | </tr> |
|---|
| 932 | <tr> |
|---|
| 933 | <td class="reference"><b id="Part4">[Part4]</b></td> |
|---|
| 934 | <td class="top"><a title="Day Software">Fielding, R., Ed.</a>, <a title="One Laptop per Child">Gettys, J.</a>, <a title="Hewlett-Packard Company">Mogul, J.</a>, <a title="Microsoft Corporation">Frystyk, H.</a>, <a title="Adobe Systems, Incorporated">Masinter, L.</a>, <a title="Microsoft Corporation">Leach, P.</a>, <a title="World Wide Web Consortium">Berners-Lee, T.</a>, <a title="World Wide Web Consortium">Lafon, Y., Ed.</a>, and <a title="greenbytes GmbH">J. F. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-latest">HTTP/1.1, part 4: Conditional Requests</a>”, Internet-Draft draft-ietf-httpbis-p4-conditional-latest (work in progress), March 2009. |
|---|
| 935 | </td> |
|---|
| 936 | </tr> |
|---|
| 937 | <tr> |
|---|
| 938 | <td class="reference"><b id="Part6">[Part6]</b></td> |
|---|
| 939 | <td class="top"><a title="Day Software">Fielding, R., Ed.</a>, <a title="One Laptop per Child">Gettys, J.</a>, <a title="Hewlett-Packard Company">Mogul, J.</a>, <a title="Microsoft Corporation">Frystyk, H.</a>, <a title="Adobe Systems, Incorporated">Masinter, L.</a>, <a title="Microsoft Corporation">Leach, P.</a>, <a title="World Wide Web Consortium">Berners-Lee, T.</a>, <a title="World Wide Web Consortium">Lafon, Y., Ed.</a>, and <a title="greenbytes GmbH">J. F. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p6-cache-latest">HTTP/1.1, part 6: Caching</a>”, Internet-Draft draft-ietf-httpbis-p6-cache-latest (work in progress), March 2009. |
|---|
| 940 | </td> |
|---|
| 941 | </tr> |
|---|
| 942 | <tr> |
|---|
| 943 | <td class="reference"><b id="RFC2046">[RFC2046]</b></td> |
|---|
| 944 | <td class="top"><a title="Innosoft International, Inc.">Freed, N.</a> and <a 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. |
|---|
| 945 | </td> |
|---|
| 946 | </tr> |
|---|
| 947 | <tr> |
|---|
| 948 | <td class="reference"><b id="RFC2119">[RFC2119]</b></td> |
|---|
| 949 | <td class="top"><a 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. |
|---|
| 950 | </td> |
|---|
| 951 | </tr> |
|---|
| 952 | <tr> |
|---|
| 953 | <td class="reference"><b id="RFC5234">[RFC5234]</b></td> |
|---|
| 954 | <td class="top"><a title="Brandenburg InternetWorking">Crocker, D., Ed.</a> and <a title="THUS plc.">P. Overell</a>, “<a href="http://tools.ietf.org/html/rfc5234">Augmented BNF for Syntax Specifications: ABNF</a>”, STD 68, RFC 5234, January 2008. |
|---|
| 955 | </td> |
|---|
| 956 | </tr> |
|---|
| 957 | </table> |
|---|
| 958 | <h2 id="rfc.references.2"><a href="#rfc.section.9.2" id="rfc.section.9.2">9.2</a> Informative References |
|---|
| 959 | </h2> |
|---|
| 960 | <table summary="Informative References"> |
|---|
| 961 | <tr> |
|---|
| 962 | <td class="reference"><b id="RFC2616">[RFC2616]</b></td> |
|---|
| 963 | <td class="top"><a title="University of California, Irvine">Fielding, R.</a>, <a title="W3C">Gettys, J.</a>, <a title="Compaq Computer Corporation">Mogul, J.</a>, <a title="MIT Laboratory for Computer Science">Frystyk, H.</a>, <a title="Xerox Corporation">Masinter, L.</a>, <a title="Microsoft Corporation">Leach, P.</a>, and <a 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. |
|---|
| 964 | </td> |
|---|
| 965 | </tr> |
|---|
| 966 | <tr> |
|---|
| 967 | <td class="reference"><b id="RFC3864">[RFC3864]</b></td> |
|---|
| 968 | <td class="top"><a title="Nine by Nine">Klyne, G.</a>, <a title="BEA Systems">Nottingham, M.</a>, and <a 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. |
|---|
| 969 | </td> |
|---|
| 970 | </tr> |
|---|
| 971 | <tr> |
|---|
| 972 | <td class="reference"><b id="RFC4288">[RFC4288]</b></td> |
|---|
| 973 | <td class="top"><a title="Sun Microsystems">Freed, N.</a> and <a>J. Klensin</a>, “<a href="http://tools.ietf.org/html/rfc4288">Media Type Specifications and Registration Procedures</a>”, BCP 13, RFC 4288, December 2005. |
|---|
| 974 | </td> |
|---|
| 975 | </tr> |
|---|
| 976 | </table> |
|---|
| 977 | <h1 id="rfc.authors"><a href="#rfc.authors">Authors' Addresses</a></h1> |
|---|
| 978 | <address class="vcard"><span class="vcardline"><span class="fn">Roy T. Fielding</span> |
|---|
| 979 | (editor) |
|---|
| 980 | <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><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> |
|---|
| 981 | <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><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> |
|---|
| 982 | <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><span class="email">JeffMogul@acm.org</span></a></span></address> |
|---|
| 983 | <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><span class="email">henrikn@microsoft.com</span></a></span></address> |
|---|
| 984 | <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><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> |
|---|
| 985 | <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><span class="email">paulle@microsoft.com</span></a></span></address> |
|---|
| 986 | <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><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> |
|---|
| 987 | <address class="vcard"><span class="vcardline"><span class="fn">Yves Lafon</span> |
|---|
| 988 | (editor) |
|---|
| 989 | <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><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> |
|---|
| 990 | <address class="vcard"><span class="vcardline"><span class="fn">Julian F. Reschke</span> |
|---|
| 991 | (editor) |
|---|
| 992 | <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><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> |
|---|
| 993 | <div id="rfc.iref.m.1"></div> |
|---|
| 994 | <div id="rfc.iref.m.2"></div> |
|---|
| 995 | <h1 id="rfc.section.A"><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> |
|---|
| 996 | <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 |
|---|
| 997 | 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>. |
|---|
| 998 | </p> |
|---|
| 999 | <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 |
|---|
| 1000 | required boundary parameter specifies the boundary string used to separate each body-part. |
|---|
| 1001 | </p> |
|---|
| 1002 | <p id="rfc.section.A.p.3"> </p> |
|---|
| 1003 | <dl> |
|---|
| 1004 | <dt>Type name:</dt> |
|---|
| 1005 | <dd>multipart</dd> |
|---|
| 1006 | <dt>Subtype name:</dt> |
|---|
| 1007 | <dd>byteranges</dd> |
|---|
| 1008 | <dt>Required parameters:</dt> |
|---|
| 1009 | <dd>boundary</dd> |
|---|
| 1010 | <dt>Optional parameters:</dt> |
|---|
| 1011 | <dd>none</dd> |
|---|
| 1012 | <dt>Encoding considerations:</dt> |
|---|
| 1013 | <dd>only "7bit", "8bit", or "binary" are permitted</dd> |
|---|
| 1014 | <dt>Security considerations:</dt> |
|---|
| 1015 | <dd>none</dd> |
|---|
| 1016 | <dt>Interoperability considerations:</dt> |
|---|
| 1017 | <dd>none</dd> |
|---|
| 1018 | <dt>Published specification:</dt> |
|---|
| 1019 | <dd>This specification (see <a href="#internet.media.type.multipart.byteranges" title="Internet Media Type multipart/byteranges">Appendix A</a>). |
|---|
| 1020 | </dd> |
|---|
| 1021 | <dt>Applications that use this media type:</dt> |
|---|
| 1022 | <dt>Additional information:</dt> |
|---|
| 1023 | <dd> |
|---|
| 1024 | <dl> |
|---|
| 1025 | <dt>Magic number(s):</dt> |
|---|
| 1026 | <dd>none</dd> |
|---|
| 1027 | <dt>File extension(s):</dt> |
|---|
| 1028 | <dd>none</dd> |
|---|
| 1029 | <dt>Macintosh file type code(s):</dt> |
|---|
| 1030 | <dd>none</dd> |
|---|
| 1031 | </dl> |
|---|
| 1032 | </dd> |
|---|
| 1033 | <dt>Person and email address to contact for further information:</dt> |
|---|
| 1034 | <dd>See Authors Section.</dd> |
|---|
| 1035 | <dt>Intended usage:</dt> |
|---|
| 1036 | <dd>COMMON</dd> |
|---|
| 1037 | <dt>Restrictions on usage:</dt> |
|---|
| 1038 | <dd>none</dd> |
|---|
| 1039 | <dt>Author/Change controller:</dt> |
|---|
| 1040 | <dd>IESG</dd> |
|---|
| 1041 | </dl> |
|---|
| 1042 | <div id="rfc.figure.u.18"></div> |
|---|
| 1043 | <p>For example:</p><pre class="text"> HTTP/1.1 206 Partial Content |
|---|
| 1044 | Date: Wed, 15 Nov 1995 06:25:24 GMT |
|---|
| 1045 | Last-Modified: Wed, 15 Nov 1995 04:58:08 GMT |
|---|
| 1046 | Content-type: multipart/byteranges; boundary=THIS_STRING_SEPARATES |
|---|
| 1047 | |
|---|
| 1048 | --THIS_STRING_SEPARATES |
|---|
| 1049 | Content-type: application/pdf |
|---|
| 1050 | Content-range: bytes 500-999/8000 |
|---|
| 1051 | |
|---|
| 1052 | ...the first range... |
|---|
| 1053 | --THIS_STRING_SEPARATES |
|---|
| 1054 | Content-type: application/pdf |
|---|
| 1055 | Content-range: bytes 7000-7999/8000 |
|---|
| 1056 | |
|---|
| 1057 | ...the second range |
|---|
| 1058 | --THIS_STRING_SEPARATES-- |
|---|
| 1059 | </pre><p id="rfc.section.A.p.5">Notes: </p> |
|---|
| 1060 | <ol> |
|---|
| 1061 | <li>Additional CRLFs may precede the first boundary string in the entity.</li> |
|---|
| 1062 | <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. |
|---|
| 1063 | </li> |
|---|
| 1064 | <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. |
|---|
| 1065 | </li> |
|---|
| 1066 | </ol> |
|---|
| 1067 | <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a> <a id="compatibility" href="#compatibility">Compatibility with Previous Versions</a></h1> |
|---|
| 1068 | <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> |
|---|
| 1069 | <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 |
|---|
| 1070 | for transfer encoding that may not be self delimiting); it was important to straighten out exactly how message lengths are |
|---|
| 1071 | computed. (<a href="#header.content-range" id="rfc.xref.header.content-range.5" title="Content-Range">Section 5.2</a>, see also <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="#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>) |
|---|
| 1072 | </p> |
|---|
| 1073 | <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 |
|---|
| 1074 | a byterange request. We therefore need a mechanism to allow byteranges with a content-range not indicating the full length |
|---|
| 1075 | of the message. (<a href="#header.content-range" id="rfc.xref.header.content-range.6" title="Content-Range">Section 5.2</a>) |
|---|
| 1076 | </p> |
|---|
| 1077 | <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 |
|---|
| 1078 | 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">3.1</a> and <a href="#header.if-range" id="rfc.xref.header.if-range.4" title="If-Range">5.3</a>) |
|---|
| 1079 | </p> |
|---|
| 1080 | <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. |
|---|
| 1081 | The 416 status code was needed to resolve this ambiguity needed to indicate an error for a byte range request that falls outside |
|---|
| 1082 | of the actual contents of a document. (Section <a href="#status.416" id="rfc.xref.status.416.2" title="416 Requested Range Not Satisfiable">3.2</a>, <a href="#header.content-range" id="rfc.xref.header.content-range.7" title="Content-Range">5.2</a>) |
|---|
| 1083 | </p> |
|---|
| 1084 | <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> |
|---|
| 1085 | <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 3.1</a>) |
|---|
| 1086 | </p> |
|---|
| 1087 | <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>) |
|---|
| 1088 | </p> |
|---|
| 1089 | <h1 id="rfc.section.C"><a href="#rfc.section.C">C.</a> <a id="collected.abnf" href="#collected.abnf">Collected ABNF</a></h1> |
|---|
| 1090 | <div id="rfc.figure.u.19"></div> <pre class="inline"><a href="#header.accept-ranges" class="smpl">Accept-Ranges</a> = "Accept-Ranges:" OWS Accept-Ranges-v |
|---|
| 1091 | <a href="#header.accept-ranges" class="smpl">Accept-Ranges-v</a> = acceptable-ranges |
|---|
| 1092 | |
|---|
| 1093 | <a href="#header.content-range" class="smpl">Content-Range</a> = "Content-Range:" OWS Content-Range-v |
|---|
| 1094 | <a href="#header.content-range" class="smpl">Content-Range-v</a> = content-range-spec |
|---|
| 1095 | |
|---|
| 1096 | <a href="#abnf.dependencies" class="smpl">HTTP-date</a> = <HTTP-date, defined in [Part1], Section 3.2.1> |
|---|
| 1097 | |
|---|
| 1098 | <a href="#header.if-range" class="smpl">If-Range</a> = "If-Range:" OWS If-Range-v |
|---|
| 1099 | <a href="#header.if-range" class="smpl">If-Range-v</a> = entity-tag / HTTP-date |
|---|
| 1100 | |
|---|
| 1101 | <a href="#core.rules" class="smpl">OWS</a> = <OWS, defined in [Part1], Section 1.2.2> |
|---|
| 1102 | |
|---|
| 1103 | <a href="#range.retrieval.requests" class="smpl">Range</a> = "Range:" OWS Range-v |
|---|
| 1104 | <a href="#range.retrieval.requests" class="smpl">Range-v</a> = byte-ranges-specifier / other-ranges-specifier |
|---|
| 1105 | |
|---|
| 1106 | <a href="#header.accept-ranges" class="smpl">acceptable-ranges</a> = ( *( "," OWS ) range-unit *( OWS "," [ OWS |
|---|
| 1107 | range-unit ] ) ) / "none" |
|---|
| 1108 | |
|---|
| 1109 | <a href="#header.content-range" class="smpl">byte-content-range-spec</a> = bytes-unit SP byte-range-resp-spec "/" ( |
|---|
| 1110 | instance-length / "*" ) |
|---|
| 1111 | <a href="#header.content-range" class="smpl">byte-range-resp-spec</a> = ( first-byte-pos "-" last-byte-pos ) / "*" |
|---|
| 1112 | <a href="#rule.ranges-specifier" class="smpl">byte-range-set</a> = ( *( "," OWS ) byte-range-spec ) / ( |
|---|
| 1113 | suffix-byte-range-spec *( OWS "," [ ( OWS byte-range-spec ) / |
|---|
| 1114 | suffix-byte-range-spec ] ) ) |
|---|
| 1115 | <a href="#rule.ranges-specifier" class="smpl">byte-range-spec</a> = first-byte-pos "-" [ last-byte-pos ] |
|---|
| 1116 | <a href="#rule.ranges-specifier" class="smpl">byte-ranges-specifier</a> = bytes-unit "=" byte-range-set |
|---|
| 1117 | <a href="#range.units" class="smpl">bytes-unit</a> = "bytes" |
|---|
| 1118 | |
|---|
| 1119 | <a href="#header.content-range" class="smpl">content-range-spec</a> = byte-content-range-spec / |
|---|
| 1120 | other-content-range-spec |
|---|
| 1121 | |
|---|
| 1122 | <a href="#abnf.dependencies" class="smpl">entity-tag</a> = <entity-tag, defined in [Part4], Section 2> |
|---|
| 1123 | |
|---|
| 1124 | <a href="#rule.ranges-specifier" class="smpl">first-byte-pos</a> = 1*DIGIT |
|---|
| 1125 | |
|---|
| 1126 | <a href="#header.content-range" class="smpl">instance-length</a> = 1*DIGIT |
|---|
| 1127 | |
|---|
| 1128 | <a href="#rule.ranges-specifier" class="smpl">last-byte-pos</a> = 1*DIGIT |
|---|
| 1129 | |
|---|
| 1130 | <a href="#header.content-range" class="smpl">other-content-range-spec</a> = other-range-unit SP other-range-resp-spec |
|---|
| 1131 | <a href="#header.content-range" class="smpl">other-range-resp-spec</a> = *CHAR |
|---|
| 1132 | <a href="#range.units" class="smpl">other-range-unit</a> = token |
|---|
| 1133 | <a href="#rule.ranges-specifier" class="smpl">other-ranges-specifier</a> = 1*CHAR |
|---|
| 1134 | |
|---|
| 1135 | <a href="#range.units" class="smpl">range-unit</a> = bytes-unit / other-range-unit |
|---|
| 1136 | |
|---|
| 1137 | <a href="#rule.ranges-specifier" class="smpl">suffix-byte-range-spec</a> = "-" suffix-length |
|---|
| 1138 | <a href="#rule.ranges-specifier" class="smpl">suffix-length</a> = 1*DIGIT |
|---|
| 1139 | |
|---|
| 1140 | <a href="#core.rules" class="smpl">token</a> = <token, defined in [Part1], Section 1.2.2> |
|---|
| 1141 | |
|---|
| 1142 | |
|---|
| 1143 | </pre> <div id="rfc.figure.u.20"></div> |
|---|
| 1144 | <p>ABNF diagnostics:</p><pre class="inline">; Accept-Ranges defined but not used |
|---|
| 1145 | ; Content-Range defined but not used |
|---|
| 1146 | ; If-Range defined but not used |
|---|
| 1147 | ; Range defined but not used |
|---|
| 1148 | </pre><h1 id="rfc.section.D"><a href="#rfc.section.D">D.</a> <a id="change.log" href="#change.log">Change Log (to be removed by RFC Editor before publication)</a></h1> |
|---|
| 1149 | <h2 id="rfc.section.D.1"><a href="#rfc.section.D.1">D.1</a> Since RFC2616 |
|---|
| 1150 | </h2> |
|---|
| 1151 | <p id="rfc.section.D.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>. |
|---|
| 1152 | </p> |
|---|
| 1153 | <h2 id="rfc.section.D.2"><a href="#rfc.section.D.2">D.2</a> Since draft-ietf-httpbis-p5-range-00 |
|---|
| 1154 | </h2> |
|---|
| 1155 | <p id="rfc.section.D.2.p.1">Closed issues: </p> |
|---|
| 1156 | <ul> |
|---|
| 1157 | <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>>) |
|---|
| 1158 | </li> |
|---|
| 1159 | <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" |
|---|
| 1160 | </li> |
|---|
| 1161 | <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" |
|---|
| 1162 | </li> |
|---|
| 1163 | </ul> |
|---|
| 1164 | <h2 id="rfc.section.D.3"><a href="#rfc.section.D.3">D.3</a> Since draft-ietf-httpbis-p5-range-01 |
|---|
| 1165 | </h2> |
|---|
| 1166 | <p id="rfc.section.D.3.p.1">Closed issues: </p> |
|---|
| 1167 | <ul> |
|---|
| 1168 | <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" |
|---|
| 1169 | </li> |
|---|
| 1170 | </ul> |
|---|
| 1171 | <p id="rfc.section.D.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>>): |
|---|
| 1172 | </p> |
|---|
| 1173 | <ul> |
|---|
| 1174 | <li>Add explicit references to BNF syntax and rules imported from other parts of the specification.</li> |
|---|
| 1175 | </ul> |
|---|
| 1176 | <h2 id="rfc.section.D.4"><a href="#rfc.section.D.4">D.4</a> <a id="changes.since.02" href="#changes.since.02">Since draft-ietf-httpbis-p5-range-02</a></h2> |
|---|
| 1177 | <p id="rfc.section.D.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>>): |
|---|
| 1178 | </p> |
|---|
| 1179 | <ul> |
|---|
| 1180 | <li>Reference RFC 3984, and update header registrations for headers defined in this document.</li> |
|---|
| 1181 | </ul> |
|---|
| 1182 | <h2 id="rfc.section.D.5"><a href="#rfc.section.D.5">D.5</a> <a id="changes.since.03" href="#changes.since.03">Since draft-ietf-httpbis-p5-range-03</a></h2> |
|---|
| 1183 | <h2 id="rfc.section.D.6"><a href="#rfc.section.D.6">D.6</a> <a id="changes.since.04" href="#changes.since.04">Since draft-ietf-httpbis-p5-range-04</a></h2> |
|---|
| 1184 | <p id="rfc.section.D.6.p.1">Closed issues: </p> |
|---|
| 1185 | <ul> |
|---|
| 1186 | <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" |
|---|
| 1187 | </li> |
|---|
| 1188 | </ul> |
|---|
| 1189 | <p id="rfc.section.D.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>>): |
|---|
| 1190 | </p> |
|---|
| 1191 | <ul> |
|---|
| 1192 | <li>Use "/" instead of "|" for alternatives.</li> |
|---|
| 1193 | <li>Introduce new ABNF rules for "bad" whitespace ("BWS"), optional whitespace ("OWS") and required whitespace ("RWS").</li> |
|---|
| 1194 | <li>Rewrite ABNFs to spell out whitespace rules, factor out header value format definitions.</li> |
|---|
| 1195 | </ul> |
|---|
| 1196 | <h2 id="rfc.section.D.7"><a href="#rfc.section.D.7">D.7</a> <a id="changes.since.05" href="#changes.since.05">Since draft-ietf-httpbis-p5-range-05</a></h2> |
|---|
| 1197 | <p id="rfc.section.D.7.p.1">Closed issues: </p> |
|---|
| 1198 | <ul> |
|---|
| 1199 | <li> <<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/142">http://tools.ietf.org/wg/httpbis/trac/ticket/142</a>>: "State base for *-byte-pos and suffix-length" |
|---|
| 1200 | </li> |
|---|
| 1201 | </ul> |
|---|
| 1202 | <p id="rfc.section.D.7.p.2">Ongoing work on Custom Ranges (<<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/85">http://tools.ietf.org/wg/httpbis/trac/ticket/85</a>>): |
|---|
| 1203 | </p> |
|---|
| 1204 | <ul> |
|---|
| 1205 | <li>Remove bias in favor of byte ranges; allow custom ranges in ABNF.</li> |
|---|
| 1206 | </ul> |
|---|
| 1207 | <p id="rfc.section.D.7.p.3">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>>): |
|---|
| 1208 | </p> |
|---|
| 1209 | <ul> |
|---|
| 1210 | <li>Add appendix containing collected and expanded ABNF, reorganize ABNF introduction.</li> |
|---|
| 1211 | </ul> |
|---|
| 1212 | <h1 id="rfc.index"><a href="#rfc.index">Index</a></h1> |
|---|
| 1213 | <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> |
|---|
| 1214 | </p> |
|---|
| 1215 | <div class="print2col"> |
|---|
| 1216 | <ul class="ind"> |
|---|
| 1217 | <li class="indline0"><a id="rfc.index.2" href="#rfc.index.2"><b>2</b></a><ul class="ind"> |
|---|
| 1218 | <li class="indline1">206 Partial Content (status code) <a class="iref" href="#rfc.iref.3"><b>3.1</b></a>, <a class="iref" href="#rfc.xref.status.206.1">B.1</a>, <a class="iref" href="#rfc.xref.status.206.2">B.2</a></li> |
|---|
| 1219 | </ul> |
|---|
| 1220 | </li> |
|---|
| 1221 | <li class="indline0"><a id="rfc.index.4" href="#rfc.index.4"><b>4</b></a><ul class="ind"> |
|---|
| 1222 | <li class="indline1">416 Requested Range Not Satisfiable (status code) <a class="iref" href="#rfc.iref.4"><b>3.2</b></a>, <a class="iref" href="#rfc.xref.status.416.1">5.2</a>, <a class="iref" href="#rfc.xref.status.416.2">B.1</a></li> |
|---|
| 1223 | </ul> |
|---|
| 1224 | </li> |
|---|
| 1225 | <li class="indline0"><a id="rfc.index.A" href="#rfc.index.A"><b>A</b></a><ul class="ind"> |
|---|
| 1226 | <li class="indline1">Accept-Ranges header <a class="iref" href="#rfc.iref.a.1"><b>5.1</b></a>, <a class="iref" href="#rfc.xref.header.accept-ranges.1">6.1</a></li> |
|---|
| 1227 | </ul> |
|---|
| 1228 | </li> |
|---|
| 1229 | <li class="indline0"><a id="rfc.index.C" href="#rfc.index.C"><b>C</b></a><ul class="ind"> |
|---|
| 1230 | <li class="indline1">Content-Range header <a class="iref" href="#rfc.xref.header.content-range.1">2</a>, <a class="iref" href="#rfc.xref.header.content-range.2">3.1</a>, <a class="iref" href="#rfc.xref.header.content-range.3">3.2</a>, <a class="iref" href="#rfc.iref.c.1"><b>5.2</b></a>, <a class="iref" href="#rfc.xref.header.content-range.4">6.1</a>, <a class="iref" href="#rfc.xref.header.content-range.5">B.1</a>, <a class="iref" href="#rfc.xref.header.content-range.6">B.1</a>, <a class="iref" href="#rfc.xref.header.content-range.7">B.1</a></li> |
|---|
| 1231 | </ul> |
|---|
| 1232 | </li> |
|---|
| 1233 | <li class="indline0"><a id="rfc.index.G" href="#rfc.index.G"><b>G</b></a><ul class="ind"> |
|---|
| 1234 | <li class="indline1"><tt>Grammar</tt> |
|---|
| 1235 | <ul class="ind"> |
|---|
| 1236 | <li class="indline1"><tt>Accept-Ranges</tt> <a class="iref" href="#rfc.iref.g.4"><b>5.1</b></a></li> |
|---|
| 1237 | <li class="indline1"><tt>Accept-Ranges-v</tt> <a class="iref" href="#rfc.iref.g.5"><b>5.1</b></a></li> |
|---|
| 1238 | <li class="indline1"><tt>acceptable-ranges</tt> <a class="iref" href="#rfc.iref.g.6"><b>5.1</b></a></li> |
|---|
| 1239 | <li class="indline1"><tt>byte-content-range-spec</tt> <a class="iref" href="#rfc.iref.g.10"><b>5.2</b></a></li> |
|---|
| 1240 | <li class="indline1"><tt>byte-range-resp-spec</tt> <a class="iref" href="#rfc.iref.g.11"><b>5.2</b></a></li> |
|---|
| 1241 | <li class="indline1"><tt>byte-range-set</tt> <a class="iref" href="#rfc.iref.g.17"><b>5.4.1</b></a></li> |
|---|
| 1242 | <li class="indline1"><tt>byte-range-spec</tt> <a class="iref" href="#rfc.iref.g.18"><b>5.4.1</b></a></li> |
|---|
| 1243 | <li class="indline1"><tt>byte-ranges-specifier</tt> <a class="iref" href="#rfc.iref.g.16"><b>5.4.1</b></a></li> |
|---|
| 1244 | <li class="indline1"><tt>bytes-unit</tt> <a class="iref" href="#rfc.iref.g.2"><b>2</b></a></li> |
|---|
| 1245 | <li class="indline1"><tt>Content-Range</tt> <a class="iref" href="#rfc.iref.g.7"><b>5.2</b></a></li> |
|---|
| 1246 | <li class="indline1"><tt>content-range-spec</tt> <a class="iref" href="#rfc.iref.g.9"><b>5.2</b></a></li> |
|---|
| 1247 | <li class="indline1"><tt>Content-Range-v</tt> <a class="iref" href="#rfc.iref.g.8"><b>5.2</b></a></li> |
|---|
| 1248 | <li class="indline1"><tt>first-byte-pos</tt> <a class="iref" href="#rfc.iref.g.19"><b>5.4.1</b></a></li> |
|---|
| 1249 | <li class="indline1"><tt>If-Range</tt> <a class="iref" href="#rfc.iref.g.13"><b>5.3</b></a></li> |
|---|
| 1250 | <li class="indline1"><tt>If-Range-v</tt> <a class="iref" href="#rfc.iref.g.14"><b>5.3</b></a></li> |
|---|
| 1251 | <li class="indline1"><tt>instance-length</tt> <a class="iref" href="#rfc.iref.g.12"><b>5.2</b></a></li> |
|---|
| 1252 | <li class="indline1"><tt>last-byte-pos</tt> <a class="iref" href="#rfc.iref.g.20"><b>5.4.1</b></a></li> |
|---|
| 1253 | <li class="indline1"><tt>other-range-unit</tt> <a class="iref" href="#rfc.iref.g.3"><b>2</b></a></li> |
|---|
| 1254 | <li class="indline1"><tt>Range</tt> <a class="iref" href="#rfc.iref.g.23"><b>5.4.2</b></a></li> |
|---|
| 1255 | <li class="indline1"><tt>range-unit</tt> <a class="iref" href="#rfc.iref.g.1"><b>2</b></a></li> |
|---|
| 1256 | <li class="indline1"><tt>ranges-specifier</tt> <a class="iref" href="#rfc.iref.g.15"><b>5.4.1</b></a></li> |
|---|
| 1257 | <li class="indline1"><tt>suffix-byte-range-spec</tt> <a class="iref" href="#rfc.iref.g.21"><b>5.4.1</b></a></li> |
|---|
| 1258 | <li class="indline1"><tt>suffix-length</tt> <a class="iref" href="#rfc.iref.g.22"><b>5.4.1</b></a></li> |
|---|
| 1259 | </ul> |
|---|
| 1260 | </li> |
|---|
| 1261 | </ul> |
|---|
| 1262 | </li> |
|---|
| 1263 | <li class="indline0"><a id="rfc.index.H" href="#rfc.index.H"><b>H</b></a><ul class="ind"> |
|---|
| 1264 | <li class="indline1">Headers |
|---|
| 1265 | <ul class="ind"> |
|---|
| 1266 | <li class="indline1">Accept-Ranges <a class="iref" href="#rfc.iref.h.1"><b>5.1</b></a>, <a class="iref" href="#rfc.xref.header.accept-ranges.1">6.1</a></li> |
|---|
| 1267 | <li class="indline1">Content-Range <a class="iref" href="#rfc.xref.header.content-range.1">2</a>, <a class="iref" href="#rfc.xref.header.content-range.2">3.1</a>, <a class="iref" href="#rfc.xref.header.content-range.3">3.2</a>, <a class="iref" href="#rfc.iref.h.2"><b>5.2</b></a>, <a class="iref" href="#rfc.xref.header.content-range.4">6.1</a>, <a class="iref" href="#rfc.xref.header.content-range.5">B.1</a>, <a class="iref" href="#rfc.xref.header.content-range.6">B.1</a>, <a class="iref" href="#rfc.xref.header.content-range.7">B.1</a></li> |
|---|
| 1268 | <li class="indline1">If-Range <a class="iref" href="#rfc.xref.header.if-range.1">3.1</a>, <a class="iref" href="#rfc.iref.h.3"><b>5.3</b></a>, <a class="iref" href="#rfc.xref.header.if-range.2">5.4.2</a>, <a class="iref" href="#rfc.xref.header.if-range.3">6.1</a>, <a class="iref" href="#rfc.xref.header.if-range.4">B.1</a></li> |
|---|
| 1269 | <li class="indline1">Range <a class="iref" href="#rfc.xref.header.range.1">2</a>, <a class="iref" href="#rfc.xref.header.range.2">2</a>, <a class="iref" href="#rfc.xref.header.range.3">3.1</a>, <a class="iref" href="#rfc.xref.header.range.4">3.2</a>, <a class="iref" href="#rfc.iref.h.4"><b>5.4</b></a>, <a class="iref" href="#rfc.xref.header.range.5">6.1</a></li> |
|---|
| 1270 | </ul> |
|---|
| 1271 | </li> |
|---|
| 1272 | </ul> |
|---|
| 1273 | </li> |
|---|
| 1274 | <li class="indline0"><a id="rfc.index.I" href="#rfc.index.I"><b>I</b></a><ul class="ind"> |
|---|
| 1275 | <li class="indline1">If-Range header <a class="iref" href="#rfc.xref.header.if-range.1">3.1</a>, <a class="iref" href="#rfc.iref.i.1"><b>5.3</b></a>, <a class="iref" href="#rfc.xref.header.if-range.2">5.4.2</a>, <a class="iref" href="#rfc.xref.header.if-range.3">6.1</a>, <a class="iref" href="#rfc.xref.header.if-range.4">B.1</a></li> |
|---|
| 1276 | </ul> |
|---|
| 1277 | </li> |
|---|
| 1278 | <li class="indline0"><a id="rfc.index.M" href="#rfc.index.M"><b>M</b></a><ul class="ind"> |
|---|
| 1279 | <li class="indline1">Media Type |
|---|
| 1280 | <ul class="ind"> |
|---|
| 1281 | <li class="indline1">multipart/byteranges <a class="iref" href="#rfc.iref.m.1"><b>A</b></a></li> |
|---|
| 1282 | <li class="indline1">multipart/x-byteranges <a class="iref" href="#rfc.iref.m.4">A</a></li> |
|---|
| 1283 | </ul> |
|---|
| 1284 | </li> |
|---|
| 1285 | <li class="indline1">multipart/byteranges Media Type <a class="iref" href="#rfc.iref.m.2"><b>A</b></a></li> |
|---|
| 1286 | <li class="indline1">multipart/x-byteranges Media Type <a class="iref" href="#rfc.iref.m.3">A</a></li> |
|---|
| 1287 | </ul> |
|---|
| 1288 | </li> |
|---|
| 1289 | <li class="indline0"><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul class="ind"> |
|---|
| 1290 | <li class="indline1"><em>Part1</em> <a class="iref" href="#rfc.xref.Part1.1">1.2</a>, <a class="iref" href="#rfc.xref.Part1.2">1.2.1</a>, <a class="iref" href="#rfc.xref.Part1.3">1.2.1</a>, <a class="iref" href="#rfc.xref.Part1.4">1.2.1</a>, <a class="iref" href="#rfc.xref.Part1.5">1.2.2</a>, <a class="iref" href="#rfc.xref.Part1.6">7</a>, <a class="iref" href="#Part1"><b>9.1</b></a>, <a class="iref" href="#rfc.xref.Part1.7">B.1</a><ul class="ind"> |
|---|
| 1291 | <li class="indline1"><em>Section 1.2</em> <a class="iref" href="#rfc.xref.Part1.1">1.2</a></li> |
|---|
| 1292 | <li class="indline1"><em>Section 1.2.2</em> <a class="iref" href="#rfc.xref.Part1.2">1.2.1</a>, <a class="iref" href="#rfc.xref.Part1.3">1.2.1</a>, <a class="iref" href="#rfc.xref.Part1.4">1.2.1</a></li> |
|---|
| 1293 | <li class="indline1"><em>Section 3.2.1</em> <a class="iref" href="#rfc.xref.Part1.5">1.2.2</a></li> |
|---|
| 1294 | </ul> |
|---|
| 1295 | </li> |
|---|
| 1296 | <li class="indline1"><em>Part3</em> <a class="iref" href="#Part3"><b>9.1</b></a>, <a class="iref" href="#rfc.xref.Part3.1">B.1</a></li> |
|---|
| 1297 | <li class="indline1"><em>Part4</em> <a class="iref" href="#rfc.xref.Part4.1">1.2.2</a>, <a class="iref" href="#rfc.xref.Part4.2">4</a>, <a class="iref" href="#Part4"><b>9.1</b></a><ul class="ind"> |
|---|
| 1298 | <li class="indline1"><em>Section 2</em> <a class="iref" href="#rfc.xref.Part4.1">1.2.2</a></li> |
|---|
| 1299 | <li class="indline1"><em>Section 4</em> <a class="iref" href="#rfc.xref.Part4.2">4</a></li> |
|---|
| 1300 | </ul> |
|---|
| 1301 | </li> |
|---|
| 1302 | <li class="indline1"><em>Part6</em> <a class="iref" href="#Part6"><b>9.1</b></a>, <a class="iref" href="#rfc.xref.Part6.1">B.1</a></li> |
|---|
| 1303 | </ul> |
|---|
| 1304 | </li> |
|---|
| 1305 | <li class="indline0"><a id="rfc.index.R" href="#rfc.index.R"><b>R</b></a><ul class="ind"> |
|---|
| 1306 | <li class="indline1">Range header <a class="iref" href="#rfc.xref.header.range.1">2</a>, <a class="iref" href="#rfc.xref.header.range.2">2</a>, <a class="iref" href="#rfc.xref.header.range.3">3.1</a>, <a class="iref" href="#rfc.xref.header.range.4">3.2</a>, <a class="iref" href="#rfc.iref.r.1"><b>5.4</b></a>, <a class="iref" href="#rfc.xref.header.range.5">6.1</a></li> |
|---|
| 1307 | <li class="indline1"><em>RFC2046</em> <a class="iref" href="#RFC2046"><b>9.1</b></a>, <a class="iref" href="#rfc.xref.RFC2046.1">A</a>, <a class="iref" href="#rfc.xref.RFC2046.2">A</a><ul class="ind"> |
|---|
| 1308 | <li class="indline1"><em>Section 5.1</em> <a class="iref" href="#rfc.xref.RFC2046.1">A</a></li> |
|---|
| 1309 | </ul> |
|---|
| 1310 | </li> |
|---|
| 1311 | <li class="indline1"><em>RFC2119</em> <a class="iref" href="#rfc.xref.RFC2119.1">1.1</a>, <a class="iref" href="#RFC2119"><b>9.1</b></a></li> |
|---|
| 1312 | <li class="indline1"><em>RFC2616</em> <a class="iref" href="#RFC2616"><b>9.2</b></a>, <a class="iref" href="#rfc.xref.RFC2616.1">D.1</a></li> |
|---|
| 1313 | <li class="indline1"><em>RFC3864</em> <a class="iref" href="#rfc.xref.RFC3864.1">6.1</a>, <a class="iref" href="#RFC3864"><b>9.2</b></a></li> |
|---|
| 1314 | <li class="indline1"><em>RFC4288</em> <a class="iref" href="#RFC4288"><b>9.2</b></a>, <a class="iref" href="#rfc.xref.RFC4288.1">A</a></li> |
|---|
| 1315 | <li class="indline1"><em>RFC5234</em> <a class="iref" href="#rfc.xref.RFC5234.1">1.2</a>, <a class="iref" href="#RFC5234"><b>9.1</b></a><ul class="ind"> |
|---|
| 1316 | <li class="indline1"><em>Appendix B.1</em> <a class="iref" href="#rfc.xref.RFC5234.1">1.2</a></li> |
|---|
| 1317 | </ul> |
|---|
| 1318 | </li> |
|---|
| 1319 | </ul> |
|---|
| 1320 | </li> |
|---|
| 1321 | <li class="indline0"><a id="rfc.index.S" href="#rfc.index.S"><b>S</b></a><ul class="ind"> |
|---|
| 1322 | <li class="indline1">Status Codes |
|---|
| 1323 | <ul class="ind"> |
|---|
| 1324 | <li class="indline1">206 Partial Content <a class="iref" href="#rfc.iref.s.1"><b>3.1</b></a>, <a class="iref" href="#rfc.xref.status.206.1">B.1</a>, <a class="iref" href="#rfc.xref.status.206.2">B.2</a></li> |
|---|
| 1325 | <li class="indline1">416 Requested Range Not Satisfiable <a class="iref" href="#rfc.iref.s.2"><b>3.2</b></a>, <a class="iref" href="#rfc.xref.status.416.1">5.2</a>, <a class="iref" href="#rfc.xref.status.416.2">B.1</a></li> |
|---|
| 1326 | </ul> |
|---|
| 1327 | </li> |
|---|
| 1328 | </ul> |
|---|
| 1329 | </li> |
|---|
| 1330 | </ul> |
|---|
| 1331 | </div> |
|---|
| 1332 | </body> |
|---|
| 1333 | </html> |
|---|
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