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Improve messaging...

* easier to tell what went wrong in some cases
* reduce number of debug messages without losing information in some cases


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Don't reuse a SSL backend connection with no SNI for a request requiring SNI.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1572967 13f79535-47bb-0310-9956-ffa450edef68

Be safe from successive or post end-of-stream flush buckets.


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Don't fail when asked to flush inflated data to the user-agent and that
coincides with the end of stream ("Zlib error flushing inflate buffer").
PR 56196.

Submitted By: [Christoph Fausak <christoph.fausak glueckkanja com>]
Committed By: ylavic


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mod_lua: Only read up to whatever the user defines as max size when using r:parsebody() - if content length is greater, return an error.

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Commit 6 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Ignore empty buckets and split buckets longer than INT_MAX (since zlib uses 32-bit ints only) in all filters.


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Commit 5 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle Zlib flags in the inflate input filter as in the output filter, using consume_zlib_flags().


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Commit 4 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle non blocking reads which would block in the inflate input filter (not an error).


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Commit 3 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle Zlib validation bytes buffering (CRC + length) in the inflate input filter :
- use validation_buffer and validation_length as state,
- loop until all the bytes are received.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1572668 13f79535-47bb-0310-9956-ffa450edef68

Commit 2 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle Zlib header buffering in the inflate input filter :
- loop until all the header is received,
- handle non blocking reads returning empty brigade,
- fix a double ap_get_brigade() when an EOS brigade is encountered while reading the header,
- in that case and no data was received so far, don't return an error but SUCCESS with the EOS, otherwise fail,
- don't remove the Content-Length and Content-MD5 headers until some data is read.

Still does not handle Zlib flags for now, next commits.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1572663 13f79535-47bb-0310-9956-ffa450edef68

Commit 1 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle Zlib header buffering in the inflate output filter :
- add the new deflate_ctx_t fields needed to re-enter the Zlib header parsing,
- introduce the new consume_zlib_flags() function to parse/consume the ZLib flags (will be used by the other filters too),
- use it to handle incomplete header in the output filter (deflate).

This alone fixes PR 55666, but the issue remains for PR 46146 (inflate/deflate input filters), hence the following patches.


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Don't reuse a SSL backend connection whose SNI differs. PR 55782.
This may happen when ProxyPreserveHost is on and the proxy-worker
handles connections to different Hosts.


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The uds_path field is at the end of the struct in 2.4.x but not in trunk.
Fix that first, then recommit.


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MMN minor bump required by proxy_conn_rec change.


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This may happen when ProxyPreserveHost is on and the proxy-worker
handles connections to different Hosts.


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Cleanup the client to backend brigade before returning an error (if any) to avoid buckets lifetime issues (backend connection's pool destroyed before request's one). PR 50335.
Suggested by rpluem.


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Input SIZE (compLen) contains the size of the original input data modulo 2^32.

PR: 56062
Submitted by: Lukas Bezdicka


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http://httpd.apache.org/docs/2.4/mod/mod_headers.html#comment_2245



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