Mercurial > hg > nginx
view conf/win-utf @ 6891:749bcfdf097a stable-1.10
HTTP/2: fixed posted streams handling.
A bug was introduced by 82efcedb310b that could lead to timing out of
responses or segmentation fault, when accept_mutex was enabled.
The output queue in HTTP/2 can contain frames from different streams.
When the queue is sent, all related write handlers need to be called.
In order to do so, the streams were added to the h2c->posted queue
after handling sent frames. Then this queue was processed in
ngx_http_v2_write_handler().
If accept_mutex is enabled, the event's "ready" flag is set but its
handler is not called immediately. Instead, the event is added to
the ngx_posted_events queue. At the same time in this queue can be
events from upstream connections. Such events can result in sending
output queue before ngx_http_v2_write_handler() is triggered. And
at the time ngx_http_v2_write_handler() is called, the output queue
can be already empty with some streams added to h2c->posted.
But after 82efcedb310b, these streams weren't processed if all frames
have already been sent and the output queue was empty. This might lead
to a situation when a number of streams were get stuck in h2c->posted
queue for a long time. Eventually these streams might get closed by
the send timeout.
In the worst case this might also lead to a segmentation fault, if
already freed stream was left in the h2c->posted queue. This could
happen if one of the streams was terminated but wasn't closed, due to
the HEADERS frame or a partially sent DATA frame left in the output
queue. If this happened the ngx_http_v2_filter_cleanup() handler
removed the stream from the h2c->waiting or h2c->posted queue on
termination stage, before the frame has been sent, and the stream
was again added to the h2c->posted queue after the frame was sent.
In order to fix all these problems and simplify the code, write
events of fake stream connections are now added to ngx_posted_events
instead of using a custom h2c->posted queue.
| author | Valentin Bartenev <vbart@nginx.com> |
|---|---|
| date | Mon, 28 Nov 2016 20:58:14 +0300 |
| parents | 63a820b0bc6c |
| children |
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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 ; # 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 ; # ° 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 ; # · 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 }