ChangeLog 1.2.1

Yichun Zhang , 15 Aug 2012 (created 22 Jun 2012)

Stable Release 1.2.1.14 - 14 August 2012

bugfix: the dtrace static probes did not build on FreeBSD, Solaris, and Mac OS X (i.e., when the --with-dtrace-probes configure option is specified).
bugfix: the systemtap tapset files and the stap-nginx script were even installed on non-Linux systems.
upgraded Lua Nginx Module to 0.5.14.
- bugfix: the dtrace provider file did not compile on FreeBSD, Solaris, and Mac OS X.

Components bundled:

LuaJIT-2.0.0-beta10
array-var-nginx-module-0.03rc1
auth-request-nginx-module-0.2
drizzle-nginx-module-0.1.2
echo-nginx-module-0.41
encrypted-session-nginx-module-0.02
form-input-nginx-module-0.07rc5
headers-more-nginx-module-0.18
iconv-nginx-module-0.10rc7
lua-5.1.5
lua-cjson-1.0.3
lua-rds-parser-0.05
lua-redis-parser-0.09
lua-resty-dns-0.05
lua-resty-memcached-0.07
lua-resty-mysql-0.10
lua-resty-redis-0.11
lua-resty-string-0.06
lua-resty-upload-0.03
memc-nginx-module-0.13rc3
nginx-1.2.1
ngx_coolkit-0.2rc1
ngx_devel_kit-0.2.17
ngx_lua-0.5.14
ngx_postgres-1.0rc1
rds-csv-nginx-module-0.05rc2
rds-json-nginx-module-0.12rc10
redis-nginx-module-0.3.6
redis2-nginx-module-0.08rc4
set-misc-nginx-module-0.22rc8
srcache-nginx-module-0.14
xss-nginx-module-0.03rc9

Mainline Version 1.2.1.13 - 12 August 2012

upgraded Lua Nginx Module to 0.5.13.
- feature: added new directive lua_socket_log_errors that can be used to disable automatic error logging for both the TCP and UDP cosockets. thanks Brian Akins for the patch.
- bugfix: segmentation faults might happen when 1. the nginx worker was shutting down (i.e., the Lua VM is closing), 2. ngx.re.gmatch was used, and 3. regex cache is enabled via the o regex flag. this bug had appeared in Lua Nginx Module 0.5.0rc30 (and OpenResty 1.0.15.9).
- bugfix: segmentation faults might happen when the system is out of memory: there was one place where we did not check the pointer returned from ngx_array_push.
- bugfix: we should avoid complicated Lua stack operations that might require memory allocaitons in the Lua atpanic handler because it would produce another exception in the handler leading to infinite loops.
upgraded Echo Nginx Module to 0.41.
- bugfix: we incorrectly returned the 500 error code in our nginx output body filters.
- bugfix: segmentation faults might happen when the system is out of memory: we forgot to check the returned pointer from ngx_calloc_buf in our nginx output body filter.
upgraded Lua Resty DNS Library to 0.05.
- feature: now we use 4096 as the receive buffer size instead of the value 512 that is suggested by RFC 1035. this could avoid data truncation when the DNS server supports datagram sizes larger than 512 bytes.
- feature: now we pick a random nameserver from the nameservers list at the first time.
- docs: fixed a mistake in the sample code and tuned it to be more illustrative. thanks Sandesh Kotwal for reporting.

Mainline Version 1.2.1.11 - 5 August 2012

bundled Lua Resty DNS Library 0.04 and enabled it by default: https://github.com/agentzh/lua-resty-dns it is a nonblocking DNS (Domain Name System) resolver library based on Lua Nginx Module's cosocket API.
upgraded Lua Nginx Module to 0.5.12.
- bugfix: the UDP cosocket object could no longer be used after an read or write error happened.
- bugfix: ngx.exit(status) always resulted in 200 OK response status when status > 200 and status < 300. thanks Nginx User for reporting this issue.
upgraded Headers More Nginx Module to 0.18.
- bugfix: fixed a set-but-not-read warning from the clang static code analyzer.
- fixed compatibility with nginx 0.7.65. thanks Banping for reporting this.
upgraded Drizzle Nginx Module to 0.1.2.
- minor code cleanup in the built-in connection pool.

Mainline Version 1.2.1.9 - 30 July 2012

upgraded Lua Resty MySQL Library to 0.10.
- bugfix: the MySQL bigint fields might overflow when converting to lua numbers. now we no longer convert such fields into Lua numbers and instead, just treat them as Lua strings. thanks Lance Li for reporting this issue.
upgraded Lua Nginx Module to 0.5.11.
- feature: added new Lua API ngx.req.init_body, ngx.req.append_body, and ngx.req.finish_body. thanks Matthieu Tourne for the patches. These new functions can be used with the existing "downstream cosocket API" (provided by ngx.req.socket) to implement efficient Nginx "input filters" in pure Lua.
- feature: added new Lua API ngx.get_phase for retrieving the current running phase of the Lua code being executed. thanks James Hurst for the patch.
- feature: added the first dtrace static probe: nginx_lua:::http-lua-register-preload-package and nginx_lua:::http-lua-req-socket-consume-preread.
- bugfix: buffer error would happen when the args option table to ngx.location.capture (and ngx.encode_args) contained a multi-value argument whose key also required URI escaping. thanks Matthieu Tourne for reporting this.
- bugfix: ngx.re.gmatch() might result in segmentation faults during nginx request cleanups if the iterator returned by ngx.re.gmatch() was collected (by Lua GC) before request cleanups. this bug had appeared in Lua Nginx Module 0.5.0rc30 (and OpenResty 1.0.15.9). thanks Wayne for reporting this issue.
- bugfix: 3rd-party nginx C modules that use the public C API function, ngx_http_lua_add_package_preload, could result in segmentation faults at nginx server startup due to uninitialized Lua VM pointer. thanks Ray Bejjani for reporting this.
- bugfix: Proper error messages were not always thrown when the iterator returned by ngx.re.gmatch was (incorrectly) used in the context of another nginx request.
- bugfix: fixed several Clang compilation warnings.
feature: applied the dtrace patch to the nginx core that adds dtrace static probing support for both the Nginx core and 3rd-party modules to the Nginx build system. this support can be enabled by ./configure --with-dtrace-probes.
feature: added new dtrace static probes to the Nginx core
- added 8 kinds of static probes to the subrequest mechanism: nginx:::http-subrequest-cycle, nginx:::http-subrequest-start, nginx:::http-subrequest-finalize-writing, nginx:::http-subrequest-finalize-nonactive, nginx:::http-subrequest-wake-parent, nginx:::http-subrequest-done, nginx:::http-subrequest-post-start, and nginx:::http-subrequest-post-done.
- added 2 kinds of static probes to the standard request body reader: nginx:::http-read-body-abort and nginx:::http-read-body-done.
- added 2 kinds of static probes to the standard main request header reader: nginx:::http-read-req-line-done and nginx:::http-read-req-header-done.
- added 1 kind of static probes to the configuration loader: nginx:::http-module-post-config.
- added the nginx.stp stapset script for systemtap: https://github.com/agentzh/nginx-dtrace/blob/master/src/dtrace/nginx.stp
- added the stap-nginx wrapper sh script for systemtap's stap command for nginx. this script will be installed to $PREFIX/sbin/ when the ./configure option --with-dtrace-probes is specified.
bugfix: fixed an issue regarding subrequests in allow_request_body_updating.patch.

Mainline Version 1.2.1.7 - 14 July 2012

upraded Headers More Nginx Module to 0.17.
- bugfix: more_clear_input_headers did not remove all the instances for the built-in headers or custom headers.
- bugfix: more_clear_input_headers might accidentally remove request headers that were not specified at all and left the specified headers with just empty header values when removing multiple built-in headers. thanks Matthieu Tourne for reporting the issues.
upgraded Lua Nginx Module to 0.5.7.
- feature: added an optional "option table" to tcpsock:connect() which accepts a pool option to allow the user specify a custom pool name intead of the automatically generated one based on the host-port pair or the socket file path. thanks Brian Akins for the patches.
- feature: implemented the UDP/unix-datagram cosocket API. the entry point is ngx.socket.udp. we preserve API compatibility with the LuaSocket library but everything is non-blocking in our implementation.
- feature: added new Nginx API for Lua: ngx.req.set_method(method_id) and ngx.req.get_method. thanks Matthieu Tourne for suggesting these.
- bugfix: the tcp/stream-unix cosocket object might hang when another concurrent request is accessing it while its operation is still in progress; now we always check for potential access conflicts and return the socket busy error string if it is indeed the case.
- bugfix: the tcpsock:connect() method always returned the (vague) error strng "connect peer error" instead of the (detailed) system error string when the connect syscall failed.
- bugfix: the TCP/stream-unix cosocket object might go wrong after it connected successfully in a single run (that is, no EAGAIN returned in the middle) and DNS domain names were used.
- bugfix: tcpsock:receive() and tcpsock:send() always returned "error" as the error message instead of the (detailed) system error string.
- bugfix: ngx.req.clear_header() did not remove all the instances for the built-in headers or custom headers.
- bugfix: ngx.req.clear_header() might accidentally remove request headers that are not specified at all and left the specified headers with just empty header values when removing multiple built-in headers. thanks Matthieu Tourne for reporting the issues.
- bugfix: we did not always test if the request object pointer is null in the ngx.req.*_body API.
- bugfix: ngx.exec() did not accept the nil value for its second (optional) argument.
- bugfix: ngx.exit(404/500/...) would throw out Lua errors when the response headers with exactly the same status code had already been sent. thanks Matthieu Tourne for reporting this.
- bugfix: gcc might issue the "unused variable" warning when PCRE was disabled. thanks Dirk Feytons for the patch.
upgraded Lua Resty Redis Library to 0.11.
- feature: added the array_to_hash method. thanks Brian Akins for the patch in github #8.
upgraded Lua Resty MySQL Library to 0.09.
- feature: added the compact_arrays option to the connect() method to make the driver return arrays of arrays instead of the (default) arrays of hashes. thanks Lance Li for requesting this feature.
- feature: added new method set_compact_arrays to change the current compact_arrays option value used by the current object for subsequent queries. thanks Lance Li for suggesting it.
- feature: added the pool option to the connect() method.
- bugfix: connections to different MySQL databases and/or different MySQL users would incorrectly share the same connection pool as long as they were connecting to the same MySQL server. thanks lhmwzy for reporting the issue.
- docs: fixed the path option value for the connect() method in README. it should not take the unix: prefix. thanks Lance Li.
- docs: documented that storing the object instance into lua module-level variables will result in failures for concurrent requests.
- docs: documented that this library cannot be used in those contexts where the cosocket API is unavailable.
upgraded the standard Lua interpreter to 5.1.5.
disabled the Lua 5.0 compatibility in the standard Lua interpreter bundled.

Mainline Version 1.2.1.5 - 4 July 2012

upgraded Lua Nginx Module to 0.5.5.
- feature: added new configure directives init_by_lua and init_by_lua_file. they can be used to pre-load Lua modules, registering true Lua global variables, and initializing the shared-memory storage defined via lua_shared_dict, at Nginx config-loading time. thanks drdrxp for suggesting this new feature.
- feature: now we print backtrace to error.log when Lua errors happen in set_by_lua, header_filter_by_lua, body_filter_by_lua*, and log_by_lua.
- bugfix: upstream data buffers were not marked as fully consumed when body_filter_by_lua* was used and ngx.arg[1] was overwritten. this could result in connection hang for large response bodies. thanks Tzury Bar Yochay for reporting this issue.
- bugfix: gcc complained that "dereferencing type-punned pointer will break strict-aliasing rules" when -O2 or above was enabled while compiling. thanks Ryan Ooi for reporting this and chaoslawful for fixing it.
upgraded Lua Resty Redis Library to 0.10.
- feature: added the Redis script command introduced in Redis 2.6. thanks Evgeniy Dolzhenko for suggesting this.
- docs: documented that storing the object instance into lua module-level variables will result in failures for concurrent requests.
- docs: documented that this lib cannot be used in those contexts where the ngx_lua cosocket API is unavailable.
upgraded Srcache Nginx Module to 0.14.
- feature: added new nginx variable $srcache_fetch_status which takes one of three values, BYASS, MISS, and HIT. thanks Feibo Li for the patch.
- feature: added new Nginx variable $srcache_store_status which takes the value BYASS or STORE.
- optimize: removed unused context data field fetch_sr on the C level to reduce the memory footprint a bit.

Mainline Version 1.2.1.3 - 25 June 2012

upgraded Echo Nginx Module to 0.40.
- feature: added new directive echo_status which can be used to specify a different default response status code other than 200. thanks Maxime Corbeau for requesting this.
upgraded Lua Nginx Module to 0.5.3.
- bugfix: ngx.say and ngx.print might cause nginx to crash when table-typed arguments were given. thanks sztanpet for reporting this in github issue #54.
applied location_if_inherits_proxy.patch to the nginx core. see http://mailman.nginx.org/pipermail/nginx-devel/2012-June/002374.html for details.

Mainline Version 1.2.1.1 - 22 June 2012

upgraded the Nginx core to 1.2.1.
- see the change log: http://nginx.org/en/CHANGES-1.2
upgraded Lua Nginx Module to 0.5.2.
- bugfix: header_filter_by_lua* did not run at all when body_filter_by_lua* was defined at the same time. thanks Tzury Bar Yochay for reporting this issue.
- feature: added the inclusive option to the cosocket:receiveuntil method to include the delimiter pattern string in the resulting data read. thanks Matthieu Tourne for the patch.
- optimize: merged two successive Nginx pool allocations in ngx_http_lua_socket_resolve_handler to reduce overhead.
upgraded Echo Nginx Module to 0.39.
- bugfix: Echo Nginx Module's configure directives was not inherited automatically by location if inner blocks.
- bugfix: the old HTTP 1.0 protocol handling was wrong. we should leave that to the Nginx core and just output responses without a Content-Length response header.
- bugfix: reading the $echo_it variable outside the echo_foreach_split loop resulted in memory invalid reads and hence segfaults; now it is evaluates to the special not found value. thanks baqs for reporting this.
upgraded Postgres Nginx Module to 1.0rc1.
- bugfix: memory leak might happen if nginx 1.1.14+ was used and (at least) libpq failed to connect to the remote database.
upgraded the (optional) no-pool patch to the latest version, 642ae25.
- bugfix: we should postpone freeing the elts storage for ngx_array_t to ngx_array_destroy when resizing the array because at least the ngx_rewrite module stores external references to the array elements.