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SCGI fixes:
*) Fixed incorrect use of r->http_version in scgi module.
The r->http_version is a version of client's request, and modules
must not set it unless they are really willing to downgrade protocol
version used for a response (i.e. to HTTP/0.9 if no response headers
are available). In neither case r->http_version may be upgraded.
The former code downgraded response from HTTP/1.1 to HTTP/1.0 for no
reason, causing various problems (see ticket #66). It was also
possible that HTTP/0.9 requests were upgraded to HTTP/1.0.
*) Removed duplicate function declaration.
*) Removed error if there is no Status header.
The SCGI specification doesn't specify format of the response, and
assuming CGI specs should be used there is no reason to complain.
RFC 3875 explicitly states that "A Status header field is optional,
and status 200 'OK' is assumed if it is omitted".
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Cache fixes:
*) Obsolete code removed.
The ngx_http_cache() and ngx_http_no_cache_set_slot() functions
were replaced in 0.8.46 and no longer used since then.
*) Handling of cache files with long headers.
There are two possible situations which can lead to this: response
was cached with bigger proxy_buffer_size value (and nginx was
restared since then, i.e. shared memory zone content was lost), or
due to the race in the cache update code (see [1]) we've end up
with fcn->body_start from a different response stored in shared
memory zone.
*) Only complain on long locked entries.
There have been multiple reports of cases where a real locked entry
was removed, resulting in a segmentation fault later in a worker
which locked the entry. It looks like default inactive timeout isn't
enough in real life.
For now just ignore such locked entries, and move them to the top of
the inactive queue to allow processing of other entries.
[1] http://mailman.nginx.org/pipermail/nginx-devel/2011-September/001287.html
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Renamed some constants to improve readability, no functional changes.
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Microoptimization of sendfile(2) usage under FreeBSD.
FreeBSD kernel checks headers/trailers pointer against NULL, not
corresponding count. Passing NULL if there are no headers/trailers
helps to avoid unneeded work in kernel, as well as unexpected 0 bytes
GIO in traces.
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Fixed: some of $sent_http_* variables might contain header entries
which actually wasn't sent to a client.
The ngx_http_variable_headers() and ngx_http_variable_unknown_header()
functions did not ignore response header entries with zero "hash"
field.
Thanks to Yichun Zhang (agentzh).
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Removed unused function ngx_regex_capture_count(). The function has
been unused since r3326 (0.8.25).
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Protection from stale write events in epoll.
Stale write event may happen if epoll_wait() reported both read and write
events, and processing of the read event closed descriptor.
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Fix for read_head with try_files and open_file_cache.
The of.read_ahead wasn't set in try_files code path, causing read_ahead
directive to be a nop if try_files and open_file_cache were used.
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Allowed add_header for proxied 206 replies.
It was working for nginx's own 206 replies as they are seen as 200 in the
headers filter module (range filter goes later in the headers filter chain),
but not for proxied replies.
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Added escaping of double quotes in ngx_escape_html().
Patch by Zaur Abasmirzoev.
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Fix of mp4 module seeking.
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Fixed segfault on ssl servers without cert with SNI (ticket #54).
Non-default servers may not have ssl context created if there are no
certificate defined. Make sure to check if ssl context present before
using it.
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Fixed flv header to match specification.
Used "\x5" in 5th byte to claim presence of both audio and video. Used
previous tag size 0 in the beginning of the flv body (bytes 10 .. 13) as
required by specification (see http://www.adobe.com/devnet/f4v.html).
Patch by Piotr Sikora.
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Fixed incorrect counting the length of headers in a SCGI request.
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Fixed handling of SIGWINCH/NOACCEPT signal.
After first upgrade it was ignored since r4020 (1.1.1, 1.0.9) as
ngx_daemonized wasn't set.
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Introduction of simple ngx_write_stderr() instead of ngx_log_stderr()
for output of ./configure options, etc., since ngx_log_stderr() output
length is limited by 2048 characters defined as NGX_MAX_ERROR_STR.
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Added image/webp and video/webm MIME types. Added svgz extension for
compressed SVG.
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Fixes for proxy_set_header, fastcgi/scgi/uwsgi_param inheritance:
*) Fixed proxy_set_header inheritance with proxy_cache (ticket #45).
Headers cleared with cache enabled (If-Modified-Since etc.) might be
cleared in unrelated servers/locations without proxy_cache enabled
if proxy_cache was used in some server/location.
Example config which triggered the problem:
proxy_set_header X-Test "test";
server { location /1 { proxy_cache name; proxy_pass ... } }
server { location /2 { proxy_pass ... } }
Another one:
server {
proxy_cache name;
location /1 { proxy_pass ... }
location /2 { proxy_cache off; proxy_pass ... }
}
In both cases If-Modified-Since header wasn't sent to backend in
location /2.
Fix is to not modify conf->headers_source, but instead merge user-supplied
headers from conf->headers_source and default headers (either cache or not)
into separate headers_merged array.
*) Fixed proxy_set_header inheritance with proxy_set_body.
*) Separate functions to merge fastcgi/scgi/uwsgi params.
No functional changes.
*) Fixed fastcgi/scgi/uwsgi_param inheritance. The following problems were
fixed:
1. Directive fastcgi_cache affected headers sent to backends in unrelated
servers / locations (see ticket #45).
2. If-Unmodified-Since, If-Match and If-Range headers were sent to
backends if fastcgi_cache was used.
3. Cache-related headers were sent to backends if there were no
fastcgi_param directives and fastcgi_cache was used at server level.
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Minor cleanup:
*) Changed error message to be more appropriate in the imaginary
"open_file_cache max=0" case.
*) Fixed NGX_CONF_TAKE1/NGX_CONF_FLAG misuse.
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Fix of the "keepalive_disable" directive.
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Image filter changes:
*) The "image_filter_sharpen" directive.
*) Cosmetics.
*) Fixed "rotate" to always work when combined with "resize/crop".
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Configure/build changes and fixes:
*) Revamped "configure --help" text.
*) FreeBSD 10-current has recently gotten POSIX_FADV_* macros.
A fix for the broken build applied.
*) AIX 7 defines sys_nerr in errno.h, therefore <errno.h> included
in the sys_nerr test.
When sys_nerr and _sys_nerr are missed on a particular platform
and our euristic for a maximum errno detection applied always
print the maximum errno number we reached instead of printing void.
This makes possible to build nginx on AIX 7.1.
*) Made it possible to build/install from the SVN checkout.
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Fixed range checking for the "somaxconn" sysctl. Fixed port range checking.
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FreeBSD's MALLOC_OPTIONS must be set before any malloc() call.
The bug has been introduced in r3799.
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Fixed unix ngx_write_chain_to_file() to return total bytes written.
Previously result of last iteration's writev() was returned. This was
unnoticed as return value was only used if chain contained only one or
two buffers.
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Fixed "expires @00h". Fixed "expires @time" with unknown last modified
time (ticket #32).
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Better handling of late upstream creation.
Configuration with duplicate upstream blocks defined after first use, i.e.
like
server {
...
location / {
proxy_pass http://backend;
}
}
upstream backend { ... }
upstream backend { ... }
now correctly results in "duplicate upstream" error.
Additionally, upstream blocks defined after first use now handle various
server directive parameters ("weight", "max_fails", etc.). Previously
configuration like
server {
...
location / {
proxy_pass http://backend;
}
}
upstream backend {
server 127.0.0.1 max_fails=5;
}
incorrectly resulted in "invalid parameter "max_fails=5"" error.
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Upstream: clearing of u->peer.connection on close.
This fixes crashes observed with some 3rd party balancer modules. Standard
balancer modules (round-robin and ip hash) explicitly set pc->connection
(aka u->peer.connection) to NULL and aren't affected.
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Manpage changes:
*) Support link.
*) Commented out reference to non-existing nginx.conf(5).
*) Rebuild manpage only if needed.
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Infrastructure changes:
*) Don't ignore xmllint errors.
*) Added missing dependencies for the CHANGES{,ru} targets.
Pass string params to xsltproc.
*) Ancient incomplete ngx_http_status_module removal.
*) Compute the repository root from the checkout.
*) Fixed RELEASE target to correctly call "release" one.
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Fix of "Content-Length" header of MP4 response if start argument was used.
Patch by Piotr Sikora.
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Reverted incorrect change in internal md5 (part of r3928).
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Fixed compression pointer processing in DNS response greater than 255 bytes.
Thanks to Ben Hawkes.
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Fixed documentation pointer.
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Fixed utf8 decode (ticket #25).
Patch by Alexey Kuts.
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Skipping location rewrite phase for server null location.
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Additional headers for proxy/fastcgi/uwsgi/scgi_ignore_headers.
Now the following headers may be ignored as well: X-Accel-Limit-Rate,
X-Accel-Buffering, X-Accel-Charset.
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Perl related fixes:
*) Handling of Content-Encoding set from perl.
This fixes double gzipping in case of gzip filter being enabled while perl
returns already gzipped response.
*) Fixed macro name.
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AIO related fixes:
*) Fix for connection drops with AIO.
Connections serving content with AIO to fast clients were dropped with
"client timed out" messages after send_timeout from response start.
*) Fix for socket leak with "aio sendfile" and "limit_rate".
Second aio post happened when timer set by limit_rate expired while we have
aio request in flight, resulting in "second aio post" alert and socket leak.
The patch adds actual protection from aio calls with r->aio already set to
aio sendfile code in ngx_http_copy_filter(). This should fix other cases
as well, e.g. when sending buffered to disk upstream replies while still
talking to upstream.
The ngx_http_writer() is also fixed to handle the above case (though it's
mostly optimization now).
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