HTTP Working GroupC. Pratt
Internet-DraftCableLabs
Intended status: ExperimentalB. Stark
Expires: May 2018AT&T
D. Thakore
CableLabs
November 2017

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draft-ietf-httpbis-rand-access-live-latest

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descargar facebook chat para celular nokia 500 Some Hypertext Transfer Protocol (HTTP) clients use byte-range requests (Range requests using the "bytes" Range Unit) to transfer select portions of large representations ([RFC7233]). And in some cases large representations require content to be continuously or periodically appended - such as representations consisting of live audio or video sources, blockchain databases, and log files. Clients cannot access the appended/live content using a Range request with the bytes range unit using the currently defined byte-range semantics without accepting performance or behavior sacrifices which are not acceptable for many applications.site chat online romania

descargar facebook chat para celular nokia 5230 For instance, HTTP clients have the ability to access appended content on an indeterminate-length resource by transferring the entire representation from the beginning and continuing to read the appended content as it's made available. Obviously, this is highly inefficient for cases where the representation is large and only the most recently appended content is needed by the client.romanian chat rooms online

descargar facebook chat para celular nokia gratis Alternatively, clients can also access appended content by sending periodic open-ended bytes Range requests using the last-known end byte position as the range start. Performing low-frequency periodic bytes Range requests in this fashion (polling) introduces latency since the client will necessarily be somewhat behind the aggregated content - mimicking the behavior (and latency) of segmented content representations such as "HTTP Live Streaming" (HLS, [RFC8216]) or "Dynamic Adaptive Streaming over HTTP" (MPEG-DASH, [DASH]). And while performing these Range requests at higher frequency can reduce this latency, it also incurs more processing overhead and HTTP exchanges as many of the requests will return no content - since content is usually aggregated in groups of bytes (e.g. a video frame, audio sample, block, or log entry).frau suchen kostenlos chip

chat cu web romanesc si microfon This document describes a usage model for range requests which enables efficient retrieval of representations that are appended to over time by using large values and associated semantics for communicating range end positions. This model allows representations to be progressively delivered by servers as new content is added. It also ensures compatibility with servers and intermediaries that don't support this technique.online lawyer chat uk

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chat cu web romanesc online The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in chat para niños de 13 a 18 años [RFC2119].best online chat website in india

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casual dating kostenlos männer A client first learns that the resource has a representation of indeterminate length by requesting a range of the resource. The server responds with the range that is available, but indicates that the length of the representation is unknown using the existing Content-Range syntax. See descargar line gratis para celular samsung chat for details and examples.descargar line gratis para celular samsung chat 335

miglior sito casual dating gratis Once the client knows the resource has indeterminate length, it can request a range with a very large end position from the resource. The client chooses an explicit end value larger than can be transferred in the foreseeable term. A server which supports range requests of indeterminate length signals its understanding of the client's indeterminate range request by indicating that the range it is providing has a range end that exactly matches the client's requested range end rather than a range that is bounded by what is currently available. See online partnersuche kostenlos leipzig for details.100 free dating site in london

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chat live cu web fete si baieti Establishing if a representation is continuously aggregating ("live") and determining the randomly-accessible byte range can both be determined using the existing definition for an open-ended byte-range request. Specifically, testbericht partnerbörsen vergleich of [RFC7233] defines a byte-range request of the form:flirt und dating apps löschen

   byte-range-spec = first-byte-pos "-" [ last-byte-pos ]

chat free fete si baieti cu web which allows a client to send a HEAD request with a first-byte-pos and leave last-byte-pos absent. A server that receives a satisfiable byte-range request (with first-byte-pos smaller than the current representation length) may respond with a 206 status code (Partial Content) with a Content-Range header indicating the currently satisfiable byte range. For example:sportpartner gesucht linz

HEAD /resource HTTP/1.1
Host: example.com
Range: bytes=0-

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HTTP/1.1 206 Partial Content
Content-Range: bytes 0-1234567/*

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chat de fete si baieti cu web Once a client has determined that a representation has an indeterminate length and established the byte range that can be accessed, it may want to perform a request with a start position within the randomly-accessible content range and an end position at an indefinite "live" point - a point where the byte-range GET request is fulfilled on-demand as the content is aggregated.free online dating in malta

chat cu web fete si baieti online For example, for a large video asset, a client may wish to start a content transfer from the video "key" frame immediately before the point of aggregation and continue the content transfer indefinitely as content is aggregated - in order to support low-latency startup of a live video stream.online dating site in malta

descargar facebook chat para celular samsung star 2 Unlike a byte-range Range request, a byte-range Content-Range response header cannot be "open ended", per descargar gratis line para celular samsung chat 335 of [RFC7233]:descargar line gratis para celular samsung chat 222

   byte-content-range  = bytes-unit SP
                        ( byte-range-resp / unsatisfied-range )

   byte-range-resp     = byte-range "/" ( complete-length / "*" )
   byte-range          = first-byte-pos "-" last-byte-pos
   unsatisfied-range   = "*/" complete-length
                          
   complete-length     = 1*DIGIT

descargar facebook chat para celular samsung android Specifically, last-byte-pos is required in byte-range. So in order to preserve interoperability with existing HTTP clients, servers, proxies, and caches, this document proposes a mechanism for a client to indicate support for handling an indeterminate-length byte-range response, and a mechanism for a server to indicate if/when it's providing a indeterminate-length response.chat para pagina web gratis español

descargar facebook chat para celular samsung galaxy ace A client can indicate support for handling indeterminate-length byte-range responses by providing a Very Large Value for the last-byte-pos in the byte-range request. For example, a client can perform a byte-range GET request of the form:partnersuche über 40 qm

GET /resource HTTP/1.1
Host: example.com
Range: bytes=1230000-999999999999

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GET /resource HTTP/1.1
Host: example.com
Range: bytes=1230000-999999999999

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HTTP/1.1 206 Partial Content
Content-Range: bytes 1230000-999999999999/*

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GET /resource HTTP/1.1
Host: example.com
Range: bytes=1230000-999999999999

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HTTP/1.1 206 Partial Content
Content-Range: bytes 1230000-1234567/*

chat cu web romania fete from the server to indicate that the response will start at byte 1230000 and end at byte 1234567 and will not include any aggregated content. This is the response expected from a typical HTTP server - one that doesn't support byte-range requests on aggregating content.kostenlos sie sucht ihn gelsenkirchen

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HEAD /resource HTTP/1.1
Host: example.com
Range: bytes=0-

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206 Partial Content
Content-Range: bytes 0-1234567/*

casual dating free website The client can then issue a request for a range starting at the end value (using a very large value for the end of a range) and receive only new content.chat schweiz flirten kostenlos

GET /resource HTTP/1.1
Host: example.com
Range: bytes=1234567-999999999999

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206 Partial Content
Content-Range: bytes 1234567-999999999999/*

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descargar facebook chat para celulares lg Some representations lend themselves to front-end content deletion in addition to aggregation. While still supporting random access, representations of this type have a portion at the beginning (the "0" end) of the randomly-accessible region that become inaccessible over time. Examples of this kind of representation would be an audio-video time-shift buffer or a rolling log file.chat schweiz flirten tipps

chat live cu fete si baieti For example a Range request containing:costa rica chat rooms

HEAD /resource HTTP/1.1
Host: example.com
Range: bytes=0-

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206 Partial Content
Content-Range: bytes 1000000-1234567/*

paginas para descargar juegos gratis para celular samsung chat 222 indicating that the first 1000000 bytes were not accessible at the time the HEAD request was processed. Subsequent HEAD requests could return:gratis partnerbörse österreich jobs

Content-Range: bytes 1000000-1234567/*
Content-Range: bytes 1010000-1244567/*
Content-Range: bytes 1020000-1254567/*

descargar juegos de futbol gratis para celular samsung chat 222 Note though that the difference between the first-byte-pos and last-byte-pos need not be constant.meine stadt dortmund partnersuche kostenlos

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GET /resource HTTP/1.1
Host: example.com
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206 Partial Content
Content-Range: bytes 1020000-999999999999/*

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descargar juegos gratis para celulares samsung chat 222 One potential issue with this recommendation is related to the use of very-large last-byte-pos values. Some client and server implementations may not be prepared to deal with byte position values of 2^^63 and beyond. So in applications where there's no expectation that the representation will ever exceed 2^^63, a value smaller than this value should be used as the Very Large last-byte-pos in a byte-seek request or content-range response. Also, some implementations (e.g. JavaScript-based clients and servers) are not able to represent all values beyond 2^^53. So similarly, if there's no expectation that a representation will ever exceed 2^^53 bytes, values smaller than this limit should be used for the last-byte-pos in byte-range requests.singlebörse ab 30

partnervermittlung frauen mexiko References

partnervermittlung mexikanische frauen Normative References

[RFC2119]
Bradner, S., “casual dating free sites”, BCP 14, RFC 2119, gratis casual dating seite, March 1997, <gratis casual dating site>.
[RFC7230]
Fielding, R., Ed. and J. Reschke, Ed., “siti di casual dating gratis”, RFC 7230, casual dating kostenlos schreiben, June 2014, <casual dating seiten kostenlos>.
[RFC7233]
Fielding, R., Ed., Lafon, Y., Ed., and J. Reschke, Ed., “gratis partnerbörse österreich meer”, RFC 7233, casual free dating.com, June 2014, <chat gratis en chile para celulares>.

chat chile para celular Informative References

[DASH]
ISO, “chat gay chile para celular”, ISO/IEC 23009-1:2014, May 2014, <chat gay chile para celulares>.
[RFC5234]
Crocker, D., Ed. and P. Overell, “casual dating es gratis”, STD 68, RFC 5234, stiftung warentest online dating websites, January 2008, <descargar wechat para celular lg c205>.
[RFC8216]
Pantos, R., Ed. and W. May, “descargar wechat para celular lg gratis”, RFC 8216, casual dating london free, August 2017, <app casual dating free login>.

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