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HTTP/2: implemented per request timeouts (closes #626). Previously, there were only three timeouts used globally for the whole HTTP/2 connection: 1. Idle timeout for inactivity when there are no streams in processing (the "http2_idle_timeout" directive); 2. Receive timeout for incomplete frames when there are no streams in processing (the "http2_recv_timeout" directive); 3. Send timeout when there are frames waiting in the output queue (the "send_timeout" directive on a server level). Reaching one of these timeouts leads to HTTP/2 connection close. This left a number of scenarios when a connection can get stuck without any processing and timeouts: 1. A client has sent the headers block partially so nginx starts processing a new stream but cannot continue without the rest of HEADERS and/or CONTINUATION frames; 2. When nginx waits for the request body; 3. All streams are stuck on exhausted connection or stream windows. The first idea that was rejected was to detect when the whole connection gets stuck because of these situations and set the global receive timeout. The disadvantage of such approach would be inconsistent behaviour in some typical use cases. For example, if a user never replies to the browser's question about where to save the downloaded file, the stream will be eventually closed by a timeout. On the other hand, this will not happen if there's some activity in other concurrent streams. Now almost all the request timeouts work like in HTTP/1.x connections, so the "client_header_timeout", "client_body_timeout", and "send_timeout" are respected. These timeouts close the request. The global timeouts work as before. Previously, the c->write->delayed flag was abused to avoid setting timeouts on stream events. Now, the "active" and "ready" flags are manipulated instead to control the processing of individual streams.
author Valentin Bartenev <vbart@nginx.com>
date Wed, 24 Feb 2016 15:58:07 +0300
parents b799b9d62c45
children b31caae8cc7b
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types {
    text/html                             html htm shtml;
    text/css                              css;
    text/xml                              xml;
    image/gif                             gif;
    image/jpeg                            jpeg jpg;
    application/javascript                js;
    application/atom+xml                  atom;
    application/rss+xml                   rss;

    text/mathml                           mml;
    text/plain                            txt;
    text/vnd.sun.j2me.app-descriptor      jad;
    text/vnd.wap.wml                      wml;
    text/x-component                      htc;

    image/png                             png;
    image/tiff                            tif tiff;
    image/vnd.wap.wbmp                    wbmp;
    image/x-icon                          ico;
    image/x-jng                           jng;
    image/x-ms-bmp                        bmp;
    image/svg+xml                         svg svgz;
    image/webp                            webp;

    application/font-woff                 woff;
    application/java-archive              jar war ear;
    application/json                      json;
    application/mac-binhex40              hqx;
    application/msword                    doc;
    application/pdf                       pdf;
    application/postscript                ps eps ai;
    application/rtf                       rtf;
    application/vnd.apple.mpegurl         m3u8;
    application/vnd.ms-excel              xls;
    application/vnd.ms-fontobject         eot;
    application/vnd.ms-powerpoint         ppt;
    application/vnd.wap.wmlc              wmlc;
    application/vnd.google-earth.kml+xml  kml;
    application/vnd.google-earth.kmz      kmz;
    application/x-7z-compressed           7z;
    application/x-cocoa                   cco;
    application/x-java-archive-diff       jardiff;
    application/x-java-jnlp-file          jnlp;
    application/x-makeself                run;
    application/x-perl                    pl pm;
    application/x-pilot                   prc pdb;
    application/x-rar-compressed          rar;
    application/x-redhat-package-manager  rpm;
    application/x-sea                     sea;
    application/x-shockwave-flash         swf;
    application/x-stuffit                 sit;
    application/x-tcl                     tcl tk;
    application/x-x509-ca-cert            der pem crt;
    application/x-xpinstall               xpi;
    application/xhtml+xml                 xhtml;
    application/xspf+xml                  xspf;
    application/zip                       zip;

    application/octet-stream              bin exe dll;
    application/octet-stream              deb;
    application/octet-stream              dmg;
    application/octet-stream              iso img;
    application/octet-stream              msi msp msm;

    application/vnd.openxmlformats-officedocument.wordprocessingml.document    docx;
    application/vnd.openxmlformats-officedocument.spreadsheetml.sheet          xlsx;
    application/vnd.openxmlformats-officedocument.presentationml.presentation  pptx;

    audio/midi                            mid midi kar;
    audio/mpeg                            mp3;
    audio/ogg                             ogg;
    audio/x-m4a                           m4a;
    audio/x-realaudio                     ra;

    video/3gpp                            3gpp 3gp;
    video/mp2t                            ts;
    video/mp4                             mp4;
    video/mpeg                            mpeg mpg;
    video/quicktime                       mov;
    video/webm                            webm;
    video/x-flv                           flv;
    video/x-m4v                           m4v;
    video/x-mng                           mng;
    video/x-ms-asf                        asx asf;
    video/x-ms-wmv                        wmv;
    video/x-msvideo                       avi;
}