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Reported by Richard Stanway,
http://mailman.nginx.org/pipermail/nginx/2017-March/053296.html.
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Instead of turning off some randomly selected http modules
when --without-http is specified, just don't process the
whole http modules section.
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Some combinations of options might cause the builds with the
--with-stream option to break due to invalid value of the
STREAM_INCS make variable, e.g.
auto/configure \
--with-stream \
--with-http_perl_module=dynamic \
--without-http_memcached_module \
--without-http_empty_gif_module \
--without-http_browser_module \
--without-http_upstream_hash_module \
--without-http_upstream_ip_hash_module \
--without-http_upstream_least_conn_module \
--without-http_upstream_keepalive_module \
--without-http_upstream_zone_module \
Explicit initialization of ngx_module_libs and ngx_module_link
matches what we already do when processing mail modules, and
is also required after the next change.
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This has somehow escaped from fbdaad9b0e7b.
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The directive configures a timeout to be used when gracefully shutting down
worker processes. When the timer expires, nginx will try to close all
the connections currently open to facilitate shutdown.
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There is no need to cancel timers early if there are other timers blocking
shutdown anyway. Preserving such timers allows nginx to continue some
periodic work till the shutdown is actually possible.
With the new approach, timers with ev->cancelable are simply ignored when
checking if there are any timers left during shutdown.
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The ev->timedout flag is set on first timer expiration, and never reset
after it. Due to this the code to stop the timer when the timer was
canceled never worked (except in a very specific time frame immediately
after start), and the timer was always armed again. This essentially
resulted in a buffer flush at the end of an event loop iteration.
This behaviour actually seems to be better than just stopping the flush
timer for the whole shutdown, so it is preserved as is instead of fixing
the code to actually remove the timer. It will be further improved by
upcoming changes to preserve cancelable timers if there are other timers
blocking shutdown.
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Most notably, this fixes possible buffer overflows if number of large
client header buffers in a virtual server is different from the one in
the default server.
Reported by Daniil Bondarev.
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Notably, this fixes CAPA and AUTH output.
The bug had appeared in nginx 1.11.6 (73b451d304c0).
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Cloned subrequests should inherit r->content_handler. This way they will
be able to use the same location configuration as the original request
if there are "if" directives in the configuration.
Without r->content_handler inherited, the following configuration tries
to access a static file in the update request:
location / {
set $true 1;
if ($true) {
# nothing
}
proxy_pass http://backend;
proxy_cache one;
proxy_cache_use_stale updating;
proxy_cache_background_update on;
}
See http://mailman.nginx.org/pipermail/nginx/2017-February/053019.html for
initial report.
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Dates in ISO 8601 format are in line with what is used in nginx.org news,
and are generally less ambiguous and easier to work with.
The changes.xml was converted using sed:
$ sed 's/date="\(..\)\.\(..\)\.\(....\)"/date="\3-\2-\1"/g' changes.xml
Appropriate changes to changes.xsls were introduced.
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With "proxy_ignore_client_abort off" (the default), upstream module changes
r->read_event_handler to ngx_http_upstream_rd_check_broken_connection().
If the handler is not cleared during upstream finalization, it can be
triggered later, causing unexpected effects, if, for example, a request
was redirected to a different location using error_page or X-Accel-Redirect.
In particular, it makes "proxy_ignore_client_abort on" non-working after
a redirection in a configuration like this:
location = / {
error_page 502 = /error;
proxy_pass http://127.0.0.1:8082;
}
location /error {
proxy_pass http://127.0.0.1:8083;
proxy_ignore_client_abort on;
}
It is also known to cause segmentation faults with aio used, see
http://mailman.nginx.org/pipermail/nginx-ru/2015-August/056570.html.
Fix is to explicitly set r->read_event_handler to ngx_http_block_reading()
during upstream finalization, similar to how it is done in the request body
reading code and in the limit_req module.
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This allows to store larger ETag values for proxy_cache_revalidate,
including ones generated as SHA256, and cache responses with longer
Vary (ticket #826).
In particular, this fixes caching of Amazon S3 responses with CORS
enabled, which now use "Vary: Origin, Access-Control-Request-Headers,
Access-Control-Request-Method".
Cache version bumped accordingly.
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Previously, slice subrequest location was selected based on request URI.
If request is then redirected to a new location, its context array is cleared,
making the slice module loose current slice range information. This lead to
broken output. Now subrequests with the NGX_HTTP_SUBREQUEST_CLONE flag are
created for slices. Such subrequests stay in the same location as the parent
request and keep the right slice context.
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The directives enable cache updates in subrequests.
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Previously, there was no way to enable the proxy_cache_use_stale behavior by
reading the backend response. Now, stale-while-revalidate and stale-if-error
Cache-Control extensions (RFC 5861) are supported. They specify, how long a
stale response can be used when a cache entry is being updated, or in case of
an error.
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This is not really needed in practice, and causes excessive debug output
in some of our tests.
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The function may leave error in the error queue while returning success,
e.g., when taking a DSO reference to itself as of OpenSSL 1.1.0d:
https://git.openssl.org/?p=openssl.git;a=commit;h=4af9f7f
Notably, this fixes alert seen with statically linked OpenSSL on some platforms.
While here, check OPENSSL_init_ssl() return value.
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Previously, buffer size was not changed from the one saved during
initial ngx_ssl_create_connection(), even if the buffer itself was not
yet created. Fix is to change c->ssl->buffer_size in the SNI callback.
Note that it should be also possible to update buffer size even in non-SNI
virtual hosts as long as the buffer is not yet allocated. This looks
like an overcomplication though.
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Based on a patch by Tom Thorogood.
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The type is no longer modified in NGINX Plus.
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