Mercurial > hg > nginx
view conf/koi-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 koi8-r <> utf8 map: it does not contain # box-drawing and some other characters. Besides this map contains # several koi8-u and Byelorussian letters which are not in koi8-r. # If you need a full and standard map, use contrib/unicode2nginx/koi-utf # map instead. charset_map koi8-r utf-8 { 80 E282AC ; # euro 95 E280A2 ; # bullet 9A C2A0 ; # 9E C2B7 ; # · A3 D191 ; # small yo A4 D194 ; # small Ukrainian ye A6 D196 ; # small Ukrainian i A7 D197 ; # small Ukrainian yi AD D291 ; # small Ukrainian soft g AE D19E ; # small Byelorussian short u B0 C2B0 ; # ° B3 D081 ; # capital YO B4 D084 ; # capital Ukrainian YE B6 D086 ; # capital Ukrainian I B7 D087 ; # capital Ukrainian YI B9 E28496 ; # numero sign BD D290 ; # capital Ukrainian soft G BE D18E ; # capital Byelorussian short U BF C2A9 ; # (C) C0 D18E ; # small yu C1 D0B0 ; # small a C2 D0B1 ; # small b C3 D186 ; # small ts C4 D0B4 ; # small d C5 D0B5 ; # small ye C6 D184 ; # small f C7 D0B3 ; # small g C8 D185 ; # small kh C9 D0B8 ; # small i CA D0B9 ; # small j CB D0BA ; # small k CC D0BB ; # small l CD D0BC ; # small m CE D0BD ; # small n CF D0BE ; # small o D0 D0BF ; # small p D1 D18F ; # small ya D2 D180 ; # small r D3 D181 ; # small s D4 D182 ; # small t D5 D183 ; # small u D6 D0B6 ; # small zh D7 D0B2 ; # small v D8 D18C ; # small soft sign D9 D18B ; # small y DA D0B7 ; # small z DB D188 ; # small sh DC D18D ; # small e DD D189 ; # small shch DE D187 ; # small ch DF D18A ; # small hard sign E0 D0AE ; # capital YU E1 D090 ; # capital A E2 D091 ; # capital B E3 D0A6 ; # capital TS E4 D094 ; # capital D E5 D095 ; # capital YE E6 D0A4 ; # capital F E7 D093 ; # capital G E8 D0A5 ; # capital KH E9 D098 ; # capital I EA D099 ; # capital J EB D09A ; # capital K EC D09B ; # capital L ED D09C ; # capital M EE D09D ; # capital N EF D09E ; # capital O F0 D09F ; # capital P F1 D0AF ; # capital YA F2 D0A0 ; # capital R F3 D0A1 ; # capital S F4 D0A2 ; # capital T F5 D0A3 ; # capital U F6 D096 ; # capital ZH F7 D092 ; # capital V F8 D0AC ; # capital soft sign F9 D0AB ; # capital Y FA D097 ; # capital Z FB D0A8 ; # capital SH FC D0AD ; # capital E FD D0A9 ; # capital SHCH FE D0A7 ; # capital CH FF D0AA ; # capital hard sign }