70b5cd6794
In GH #2804, @Bbulatov reported that the result of hlua_stream_ctx_get() was used and de-referenced without checking if it's NULL in hlua_filter_delete() while other functions used to check for NULL before de-referencing it. In fact hlua_stream_ctx_get() can only return NULL if hlua_stream_ctx_prepare() failed or was not called on the current stream. Now because of the filter's API, since hlua_filter_delete() is mapped as detach method and hlua_filter_new() as attach method, and since hlua_filter_new() is responsible for calling hlua_stream_ctx_prepare(), there's no reason hlua_filter_delete() should be called if hlua_filter_new() failed or wasn't called. Thus we can assume that hlua can never be NULL in hlua_filter_delete(), so we add a BUG_ON() to ensure it is always the case and remove the ambiguity.
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.