e415e3cb7a
When a HEADERS frame is encoded to be sent, the maximum number of headers allowed in the frame is lower than on receiving path. This can lead to report a sending error while the message was accepted. It could be confusing. In addition, the start-line is splitted into pseudo-headers and consummes this way some header slots, increasing the difference between HEADERS frames encoding and decoding. It is even more noticeable because when a HEADERS frame is decoded, a margin is used to be able to handle splitted cookie headers. Concretly, on decoding path, a limit of twice the maxumum number of headers allowed in a message (tune.http.maxhdr * 2) is used. On encoding path, the exact limit is used. It is not consistent. Note that when a frame is decoded, we must use a larger limit because the pseudo headers are reassembled in the start-line and must count for one. But also because, most of time, the cookies are splitted into several headers and are reassembled too. To fix the issue, the same ratio is applied on sending path. A limit must be defined because an dynamic allocation is not acceptable. Twice of the configured limit should be good enough to support headers manipulation. This patch should be backported to all stable versions. |
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README.md
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.