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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 63a820b0bc6c
children
line wrap: on
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# This map is not a full windows-1251 <> utf8 map: it does not
# contain Serbian and Macedonian letters.  If you need a full map,
# use contrib/unicode2nginx/win-utf map instead.

charset_map  windows-1251  utf-8 {

    82  E2809A ; # single low-9 quotation mark

    84  E2809E ; # double low-9 quotation mark
    85  E280A6 ; # ellipsis
    86  E280A0 ; # dagger
    87  E280A1 ; # double dagger
    88  E282AC ; # euro
    89  E280B0 ; # per mille

    91  E28098 ; # left single quotation mark
    92  E28099 ; # right single quotation mark
    93  E2809C ; # left double quotation mark
    94  E2809D ; # right double quotation mark
    95  E280A2 ; # bullet
    96  E28093 ; # en dash
    97  E28094 ; # em dash

    99  E284A2 ; # trade mark sign

    A0  C2A0 ;   # &nbsp;
    A1  D18E ;   # capital Byelorussian short U
    A2  D19E ;   # small Byelorussian short u

    A4  C2A4 ;   # currency sign
    A5  D290 ;   # capital Ukrainian soft G
    A6  C2A6 ;   # borken bar
    A7  C2A7 ;   # section sign
    A8  D081 ;   # capital YO
    A9  C2A9 ;   # (C)
    AA  D084 ;   # capital Ukrainian YE
    AB  C2AB ;   # left-pointing double angle quotation mark
    AC  C2AC ;   # not sign
    AD  C2AD ;   # soft hypen
    AE  C2AE ;   # (R)
    AF  D087 ;   # capital Ukrainian YI

    B0  C2B0 ;   # &deg;
    B1  C2B1 ;   # plus-minus sign
    B2  D086 ;   # capital Ukrainian I
    B3  D196 ;   # small Ukrainian i
    B4  D291 ;   # small Ukrainian soft g
    B5  C2B5 ;   # micro sign
    B6  C2B6 ;   # pilcrow sign
    B7  C2B7 ;   # &middot;
    B8  D191 ;   # small yo
    B9  E28496 ; # numero sign
    BA  D194 ;   # small Ukrainian ye
    BB  C2BB ;   # right-pointing double angle quotation mark

    BF  D197 ;   # small Ukrainian yi

    C0  D090 ;   # capital A
    C1  D091 ;   # capital B
    C2  D092 ;   # capital V
    C3  D093 ;   # capital G
    C4  D094 ;   # capital D
    C5  D095 ;   # capital YE
    C6  D096 ;   # capital ZH
    C7  D097 ;   # capital Z
    C8  D098 ;   # capital I
    C9  D099 ;   # capital J
    CA  D09A ;   # capital K
    CB  D09B ;   # capital L
    CC  D09C ;   # capital M
    CD  D09D ;   # capital N
    CE  D09E ;   # capital O
    CF  D09F ;   # capital P

    D0  D0A0 ;   # capital R
    D1  D0A1 ;   # capital S
    D2  D0A2 ;   # capital T
    D3  D0A3 ;   # capital U
    D4  D0A4 ;   # capital F
    D5  D0A5 ;   # capital KH
    D6  D0A6 ;   # capital TS
    D7  D0A7 ;   # capital CH
    D8  D0A8 ;   # capital SH
    D9  D0A9 ;   # capital SHCH
    DA  D0AA ;   # capital hard sign
    DB  D0AB ;   # capital Y
    DC  D0AC ;   # capital soft sign
    DD  D0AD ;   # capital E
    DE  D0AE ;   # capital YU
    DF  D0AF ;   # capital YA

    E0  D0B0 ;   # small a
    E1  D0B1 ;   # small b
    E2  D0B2 ;   # small v
    E3  D0B3 ;   # small g
    E4  D0B4 ;   # small d
    E5  D0B5 ;   # small ye
    E6  D0B6 ;   # small zh
    E7  D0B7 ;   # small z
    E8  D0B8 ;   # small i
    E9  D0B9 ;   # small j
    EA  D0BA ;   # small k
    EB  D0BB ;   # small l
    EC  D0BC ;   # small m
    ED  D0BD ;   # small n
    EE  D0BE ;   # small o
    EF  D0BF ;   # small p

    F0  D180 ;   # small r
    F1  D181 ;   # small s
    F2  D182 ;   # small t
    F3  D183 ;   # small u
    F4  D184 ;   # small f
    F5  D185 ;   # small kh
    F6  D186 ;   # small ts
    F7  D187 ;   # small ch
    F8  D188 ;   # small sh
    F9  D189 ;   # small shch
    FA  D18A ;   # small hard sign
    FB  D18B ;   # small y
    FC  D18C ;   # small soft sign
    FD  D18D ;   # small e
    FE  D18E ;   # small yu
    FF  D18F ;   # small ya
}