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Entity tag may be of length 2 as per RFC 2616, i.e. double quotes only.
Pointed out by Ruslan Ermilov.
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It allows to disable generation of nginx's own entity tags, while
still handling ETags in cache properly. This may be useful e.g.
if one want to serve static files from servers with different ETag
generation algorithms.
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Notably this allows to clear ETag if one want to for some reason.
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This includes handling of ETag headers (if present in a response) with
basic support for If-Match, If-None-Match conditionals in not modified
filter.
Note that the "r->headers_out.last_modified_time == -1" check in the not
modified filter is left as is intentionally. It's to prevent handling
of If-* headers in case of proxy without cache (much like currently
done with If-Modified-Since).
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This makes code more extendable. The only functional change is when
If-Modified-Since and If-Unmodified-Since are specified together, the
case which is explicitly left undefined by RFC 2616. The new behaviour
is to respect them both, which seems better.
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This allows to use last modified time set in If-Range checks. Code
simplified to improve readability.
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If modification time isn't known, skip range processing and return full
entity body instead of just ignoring If-Range. Ignoring If-Range isn't
safe as client will assume entity wasn't changed since time specified.
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(closes #182)
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the response header length.
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is needed.
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This saves about 522K per connection.
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The original idea was to optimize edge cases in case of interchangeable
backends, i.e. don't establish a new connection if we have any one
cached. This causes more harm than good though, as it screws up
underlying balancer's idea about backends used and may result in
various unexpected problems.
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HP-UX needs _HPUX_ALT_XOPEN_SOCKET_API to be defined to be able to
use various POSIX versions of networking functions. Notably sendmsg()
resulted in "sendmsg() failed (9: Bad file number)" alerts without it.
See xopen_networking(7) for more details.
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Poll event method needs ngx_cycle->files to work, and use of ngx_exit_cycle
without files set caused null pointer dereference in resolver's cleanup
on udp socket close.
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With previous code wildcard names were added to hash even if conflict
was detected. This resulted in identical names in hash and segfault
later in ngx_hash_wildcard_init().
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Number of entries in stsc atom was wrong if we've added an entry to
split a chunk.
Additionally, there is no need to add an entry if we are going to split
last chunk in an entry, it's enough to update the entry we already have.
Previously new entry was added and old one was left as is, resulting in
incorrect entry with zero chunks which might confuse some software.
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Contains response status code as a 3-digit integer
(with leading zeroes if necessary), or one of the following values:
000 - response status code has not yet been assigned
009 - HTTP/0.9 request is being processed
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resolved address was used. Now all addresses will be used.
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If sending a DNS request fails with an error (e.g., when mistakenly trying
to send it to a local IP broadcast), such a request is not deleted if there
are clients waiting on it. However, it was still erroneously removed from
the queue. Later ngx_resolver_cleanup_tree() attempted to remove it from
the queue again that resulted in a NULL pointer dereference.
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user visible part.
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There are too many problems with special NTFS streams, notably "::$data",
"::$index_allocation" and ":$i30:$index_allocation".
For now we don't reject all URIs with ":" like Apache does as there are no
good reasons seen yet, and there are multiple programs using it in URLs
(e.g. MediaWiki).
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Windows treats "/directory./" identical to "/directory/". Do the same
when working on Windows. Note that the behaviour is different from one
with last path component (where multiple spaces and dots are ignored by
Windows).
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This includes trailings dots and spaces, NTFS streams (and short names, as
previously checked). The checks are now also done in ngx_file_info(), thus
allowing to use the "try_files" directive to protect external scripts.
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Removed duplicate call of ngx_http_upstream_init_round_robin_peer()
overlooked during code changes. Rewritten "return lcp->free_rr_peer(...)"
as MSVC doesn't like it.
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Patch by Yichun Zhang (agentzh).
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if SSL buffer is not used.
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If the "proxy_cookie_domain" or "proxy_cookie_path" directive is used and there
are no matches in Set-Cookie header then ngx_http_proxy_rewrite_cookie() returns
NGX_DECLINED to indicate that the header was not rewritten. Returning this value
further from the upstream headers copy handler resulted in 500 error response.
See here for report:
http://mailman.nginx.org/pipermail/nginx/2012-May/033858.html
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This is done by removing the "const" qualifier from the common return
type of handler functions returning either "const char *" or "char *".
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Patch by Denis F. Latypoff (slightly modified).
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