Bug 56942 - Unable to implement TRANSFER-CHUNKED:ENCODING with apache 2.2
Summary: Unable to implement TRANSFER-CHUNKED:ENCODING with apache 2.2
Alias: None
Product: Apache httpd-2
Classification: Unclassified
Component: mod_proxy (show other bugs)
Version: 2.2.27
Hardware: PC Linux
: P2 regression (vote)
Target Milestone: ---
Assignee: Apache HTTPD Bugs Mailing List
Keywords: MassUpdate
Depends on:
Reported: 2014-09-10 09:52 UTC by sneha
Modified: 2018-11-07 21:08 UTC (History)
1 user (show)


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Description sneha 2014-09-10 09:52:29 UTC
I am trying to implement Transfer-Chunked:Encoding with apache 2.2.

Config is:

•	Server version: Apache/2.2.27 (Unix)
•	With mod_proxy
•	tail -2 conf/httpd.conf
SetEnv proxy-sendchunks
PassEnv proxy-sendchunks

However apache still refuses the request from the HTTP Client which sends the header
Transfer-Encoding: chunked 

The below error is logged in  the apache log:

[Tue Sep 02 21:38:16 2014] [error] [client] chunked Transfer-Encoding forbidden: 

Does it work for you? Can I check your linux to see if my settings (especially proxy-sendchunks) is set correctly?

The same HTTP Client works with IIS. So the issue exist with apache web server here.
Comment 1 Eric Covener 2014-09-10 11:35:25 UTC
What mod_proxy sub-module handles the request?  mod_proxy_http? mod_proxy_scgi?
You marked the bug a regression -- what's it a regression from?
Comment 2 sneha 2014-09-11 06:02:43 UTC
Hello Eric,

I have installed the apache 2.2 as follows:

./configure --prefix=<path> --enable-mods-shared="all proxy" --with-mpm=prefork --with-expat=builtin
make install

This installed the apache nad proxy modules.

Then i set the below in httpd.conf

ProxyRequests Off
ProxyTimeout 3000

<Proxy *>

Order Allow,Deny

Allow from all



SetEnv proxy-sendchunked 1

If i try to upload content from client with "Transfer-Chunked:encoding" below error is thrown:
chunked Transfer-Encoding forbidden: /test/test.dll

I was doing regression testing. Hence marked the case as regression.
Comment 3 William A. Rowe Jr. 2018-11-07 21:08:24 UTC
Please help us to refine our list of open and current defects; this is a mass update of old and inactive Bugzilla reports which reflect user error, already resolved defects, and still-existing defects in httpd.

As repeatedly announced, the Apache HTTP Server Project has discontinued all development and patch review of the 2.2.x series of releases. The final release 2.2.34 was published in July 2017, and no further evaluation of bug reports or security risks will be considered or published for 2.2.x releases. All reports older than 2.4.x have been updated to status RESOLVED/LATER; no further action is expected unless the report still applies to a current version of httpd.

If your report represented a question or confusion about how to use an httpd feature, an unexpected server behavior, problems building or installing httpd, or working with an external component (a third party module, browser etc.) we ask you to start by bringing your question to the User Support and Discussion mailing list, see [https://httpd.apache.org/lists.html#http-users] for details. Include a link to this Bugzilla report for completeness with your question.

If your report was clearly a defect in httpd or a feature request, we ask that you retest using a modern httpd release (2.4.33 or later) released in the past year. If it can be reproduced, please reopen this bug and change the Version field above to the httpd version you have reconfirmed with.

Your help in identifying defects or enhancements still applicable to the current httpd server software release is greatly appreciated.