ChangeLog 1.2.4

Yichun Zhang , 23 Dec 2012 (created 14 Oct 2012)

Stable Release 1.2.4.14 - 23 December 2012

upgraded Lua Nginx Module to 0.7.9.
- bugfix: assignment to ngx.status would always be overridden by the later ngx.exit() calls for HTTP 1.0 requests if lua_http10_buffering is on (the default setting). thanks chenshu for reporting this issue.
- bugfix: there was a typo in the error message when accessing an Nginx variable that has not been defined.
- docs: documented the request body automatic inheritance behaviour in ngx.location.capture.
- docs: fixed incorrect dates shown in the code samples for ngx.http_time and ngx.parse_http_time. thanks Gosuke Miyashita for the patch.
upgraded Lua Resty Upload Library to 0.05.
- bugfix: unexpected runtime exceptions would be thrown when resty.upload met a in-part header field line or a terminating boundary line that was too long. this bug had appeared in Lua Resty Upload Library 0.04 and OpenResty 1.2.4.7.
- bugfix: resty.upload could not parse Content-Type request header values like boundary="simple boundary", that is, with double quotes around the boundary value.
- optimize: marked internal auxiliary functions as Lua local functions. The following components are bundled:
LuaJIT-2.0.0
array-var-nginx-module-0.03rc1
auth-request-nginx-module-0.2
drizzle-nginx-module-0.1.4
echo-nginx-module-0.41
encrypted-session-nginx-module-0.02
form-input-nginx-module-0.07rc5
headers-more-nginx-module-0.19
iconv-nginx-module-0.10rc7
lua-5.1.5
lua-cjson-1.0.3
lua-rds-parser-0.05
lua-redis-parser-0.10
lua-resty-dns-0.09
lua-resty-memcached-0.10
lua-resty-mysql-0.12
lua-resty-redis-0.15
lua-resty-string-0.08
lua-resty-upload-0.05
memc-nginx-module-0.13rc3
nginx-1.2.4
ngx_coolkit-0.2rc1
ngx_devel_kit-0.2.17
ngx_lua-0.7.9
ngx_postgres-1.0rc2
rds-csv-nginx-module-0.05rc2
rds-json-nginx-module-0.12rc10
redis-nginx-module-0.3.6
redis2-nginx-module-0.09
set-misc-nginx-module-0.22rc8
srcache-nginx-module-0.16
xss-nginx-module-0.03rc9

Mainline Version 1.2.4.13 - 11 December 2012

upgraded Lua Nginx Module to 0.7.8.
- bugfix: ngx.req.set_body_file() might lead to memory issues because it directly used the storage of Lua strings allocated by the Lua GC (we should have allocated a new memory block on the Nginx side and copy the string data over).
upgraded Lua Resty MySQL Library to 0.12.
- feature: convert the MySQL newdecimal typed fields to Lua numbers by default as requested by shedar.
- optimize: marked the internal Lua function _recv_packet as a local function.

Mainline Version 1.2.4.11 - 8 December 2012

upgraded Lua Nginx Module to 0.7.7.
- feature: added ngx.req.start_time() to return the request starting time in seconds (the milliseconds part is the decimal part just as in ngx.now). thanks Matthieu Tourne for the patch.
- feature: setting ngx.status or calling ngx.exit(N) (where N >= 300) after sending out response headers no longer yields a Lua exception but only leaves an error message in the error.log file, which is useful for Lua land debugging. thanks Matthieu Tourne for requesting this.
- feature: the user can now call ngx.exit(444) to abort pending subrequests in other "light threads" from within a "light thread".
- feature: added new dtrace static probe http-lua-user-thread-wait.
- bugfix: ngx.location.capture and ngx.location.capture_multi might hang infinitely because the parent request might not be waken up right after the first time the post_subrequest callback was called.
- bugfix: the "light thread" object created by ngx.thread.spawn() or ngx.on_abort() might be prematurely collected by the Lua GC because we did not correctly register its coroutine object into the Lua regsitry table. this bug may crash the Lua VM and Nginx workers under load. thanks Zhu Dejiang for reporting this issue.
- bugfix: ngx.thread.wait() might hang infinitely when more than 4 user "light threads" are created in the same request handler due to the incorrect use of ngx_array_t for ngx_list_t. thanks Junwei Shi for reporting this issue.
- bugfix: when a user coroutine or user "light thread" dies with an error, our Lua backtrace dumper written in C may access one of its dead parent threads (if any) which could lead to segmentation faults.
- bugfix: ngx.exit(N) incorrectly threw out Lua exceptions when N was 408, 499, or 444 and the response header was already sent. thanks Kindy Lin for reporting this issue.
- bugfix: when the user callback function registered by ngx.on_abort() discarded the client abort event, the request would be aborted by force when the next client abort event happened.
- bugfix: an English typo in the error message for init_by_lua*.
applied slab_alloc_no_memory_as_info.patch to lower the log level of the error message "ngx_slab_alloc() failed: no memory" from "crit" to "info".
bugfix: the upstream_pipelining patch introduced a regression that when upstream_next is in action, Nginx might hang. thanks Kindy Lin for reporting this issue.
bugfix: include the latest changes in the LuaJIT 2.0 git repository (up to git commit 2ad9834d).

Mainline Version 1.2.4.9 - 20 November 2012

upgraded LuaJIT to 2.0.0 final.
- change logs: http://luajit.org/changes.html
upgraded Lua Nginx Module to 0.7.5.
- bugfix: ngx.req.clear_header() would result in memory invalid reads when removing the 21st, 41st, 61st (and etc) request headers. thanks Umesh Sirsiwal for reporting this issue.
- bugfix: ngx.log() would truncate the log messages which have null characters (\0) in it. thanks Wang Xi for reporting this issue.
- docs: eliminated the use of package.seeall in code samples and also explicitly discouraged the use of it.
- docs: documented the special case that client closes the connection before ngx.req.socket() finishes reading the whole body.
upgraded Headers More Nginx Module to 0.19.
- bugfix: more_clear_input_headers would result in memory invalid reads when removing the 21st, 41st, 61st (and etc) request headers. thanks Umesh Sirsiwal for reporting this issue.
- docs: fixed an issue in the sample code that tried to clear Transfer-Encoding which cannot actually be cleared. thanks koukou73gr.
upgraded Lua Resty String Library to 0.08.
- bugfix: the new() method in the resty.aes module might use a random key when the method option is omitted in the hash table argument. thanks wsser for the patch.
- feature: we now return a second string describing the error when either iv or key is bad.
bugfix: ./configure --with-pcre=PATH did not accept relative paths as PATH. thanks smallfish for reporting this issue.

Mainline Version 1.2.4.7 - 11 November 2012

upgraded LuaJIT to 2.0.0rc3.
upgraded Lua Nginx Module to 0.7.4.
- feature: added new directive lua_check_client_abort (default to off) for monitoring and processing the event that the client closes the (downstream) connection prematurely. thanks Zhu Dejiang for request this feature.
- feature: added new Lua API ngx.on_abort() which is used to register user Lua function callback for the event that the client closes the (downstream) connection prematurely. thanks Matthieu Tourne for suggesting this feature.
- feature: ngx.exit(N) can now abort pending subrequests when N = 408 (request time out) or N = 499 (client closed request) or N = -1 (error).
- bugfix: The TCP/stream cosocket's connect() method could not detect errors like "connection refused" when kqueue was used (on FreeBSD or Mac OS X, for example). thanks smallfish for reporting this issue.
- bugfix: reading operations on ngx.req.socket() did not return any errors when the request body got truncated; now we return the "client aborted" error.
upgraded Lua Resty DNS Library to 0.09.
- refactor: avoided using package.seeall in Lua module definitions, which improves performance and also prevents subtle bad side-effects.
- bugfix: a debugging output might be sent to stdout unexpectedly in some code path.
upgraded Lua Resty Memcached Library to 0.10.
- refactor: avoided using package.seeall in Lua module definitions, which improves performance and also prevents subtle bad side-effects.
- docs: fixed typos in README. thanks cyberty for the patch.
upgraded Lua Resty Redis Library to 0.15.
- refactor: avoided using package.seeall in Lua module definitions, which improves performance and also prevents subtle bad side-effects.
- optimize: avoided using ipairs() which is slower than plain for i=1,N loops.
upgraded Lua Resty MySQL Library to 0.11.
- refactor: avoided using package.seeall in Lua module definitions, which improves performance and also prevents subtle bad side-effects.
- feature: now the new() method will return a string describing the error as the second return value in case of failures.
upgraded Lua Resty Upload Library to 0.04.
- refactor: avoided using package.seeall in Lua module definitions, which improves performance and also prevents subtle bad side-effects.
upgraded Lua Resty String Library to 0.07.
- refactor: avoided using package.seeall in Lua module definitions, which improves performance and also prevents subtle bad side-effects.
- docs: typo-fixes in the code samples from Bearnard Hibbins.
bugfix: nginx upstream modules could not detect the "connection refused" error in time if kqueue was used; now we apply the upstream_test_connect_kqueue patch for the Nginx core.

Mainline Version 1.2.4.5 - 30 October 2012

applied the official hotfix #1 patch to LuaJIT 2.0.0 beta11.
- see details here: http://www.freelists.org/post/luajit/Hotfix1-for-LuaJIT200beta11
upgraded Lua Nginx Module to 0.7.3.
- feature: added the get_keys method for the shared memory dictionaries for fetching all the (or the specified number of) keys (default to 1024 keys). thanks Brian Akins for the patch.

Mainline Version 1.2.4.3 - 17 October 2012

upgraded LuaJIT to 2.0.0 beta11.
- made Lua Resty Redis Library 27% faster, Lua Resty Memcached Library 22% faster, and Lua Resty MySQL Library 15% faster, all for simple test cases loaded by ab, tested on Linux x86_64.
- all Lua APIs involved with I/O in Lua Nginx Module are faster in general.
- complete change log: http://luajit.org/changes.html
upgraded Lua Resty Memcached Library to 0.09.
- optimize: we now use Lua's own table.concat() to do string concatenation for all the memcached requests instead of relying on the cosocket API (on the C level) because calling the Lua C API is much slower especially when LuaJIT is in use. now for simple test cases loaded by ab -k -c10, we get 11.3% overall performance boost.
upgraded Lua Nginx Module to 0.7.2.
- feature: now we can automatically detect the vendor-provided LuaJIT-2.0 package on Gentoo. thanks Il'ya V. Yesin for the patch. it is still recommended, however, to explicitly set the environments LUAJIT_INC and LUAJIT_LIB.

Mainline Version 1.2.4.1 - 14 October 2012

upgraded the Nginx core to 1.2.4.
- see http://nginx.org/en/CHANGES-1.2 for changes.
upgraded Lua Nginx Module to 0.7.1.
- feature: implemented the "light threads" API, which allows asynchronous concurrent processing within a single Nginx request handler, based on automatically-scheduled Lua coroutines. thanks Lee Holloway for requesting this feature.
  - http://wiki.nginx.org/HttpLuaModule#ngx.thread.spawn
  - http://wiki.nginx.org/HttpLuaModule#ngx.thread.wait
- bugfix: ngx.re.gsub() might throw out the exception attempt to call a string value when the replace argument was a Lua function and the subject string was large. thanks Zhu Maohai for reporting this issue.
- bugfix: older gcc versions might issue warnings like variable 'nrets' might be clobbered by 'longjmp' or 'vfork', like gcc 3.4.3 (for Solaris 11) and gcc 4.1.2 (for Red Hat Linux). thanks Wenhua Zhang for reporting this issue.
- docs: added a warning for ngx.var.VARIABLE that memory is allocated in the per-request memory pool. thanks lilydjwg.
- docs: made it clear why return is recommended to be used with ngx.exit(). thanks Antoine.
- docs: massive wording improvements from Dayo.
now we add Srcache Nginx Module before both Lua Nginx Module and Headers More Nginx Module so that the former's output filter runs after those of the latter.