h1(#changelog). Changelog

h2. Version 0.5.1

* Fix websocket handler to avoid read data from connections either closed or with error

h2. Version 0.5.0

* Improvements on pushstream.js
* Add push_stream_header_template_file directive
* Fix the support for large messages
* [performance] Reduce the number of lookups for channels
* [performance] Use distributed lock instead of only one lock for all operations
* [performance] Changed the parser of message template to apply it at once
* Fix buffer usage to avoid them to be overwritten

h2. Version 0.4.1

* Fix to not send a trailing comma on jsonp object
* Fix pushstream.js log messages when firebug is opened after the page was loaded on Firefox
* Changed pushstream.js license to MIT
* Fix DoS on message formatter when text contains huge number of template patterns (Thanks _Buglloc_)
* Fix send messages through WebSocket connection when the server is using kqueue
* Ensure all queue members are initialized to not produce errors on calling remove function, without insert them on a queue
* Fix to be possible compile with clang
* Fix stuck connections when sending only header responses
* Fix socket leak on reload process for sockets used in inter process communication and connections

h2. Version 0.4.0

* Added support to use variables as value on push_stream_allowed_origins directive
* Removed global variables to allow have more than one http block on the same Nginx instance
* Added initial support to send binary data
* Added support to get old messages using time and tag to all wrappers on pushstream.js
* Added push_stream_timeout_with_body directive to indicate whether send a full message on timed out long polling connections, or not
* Removed default value from push_stream_padding_by_user_agent directive, it was "[A|a]ndroid 2,4097,4097:[S|s]afari,1025,0"
* Change the publish message action through a WebSocket connection to add the message to all subscribed channels
* Added support to get channels statistics, delete channels and publish message to some channels specifying their ids on push_stream_channels_path
* Avoid reapply formatter to header, message or footer template when inside an if on event source mode
* Added support for OPTIONS method on publisher location
* Unified longPollingTimeout and timeout configurations on javascript client
* Renamed some javascript client configurations
** jsonDataKey -> jsonTextKey
** longPollingUseJSONP -> useJSONP
** longPollingTagArgument -> tagArgument
** longPollingTimeArgument -> timeArgument
** longPollingByHeaders -> messagesControlByArgument (value must be changed appropriately)
** reconnecttimeout -> reconnectOnTimeoutInterval
** checkChannelAvailabilityInterval -> reconnectOnChannelUnavailableInterval
** secondsAgo -> messagesPublishedAfter
* Removed some javascript client configurations
** longPollingInterval
* Fix lazy reload
* Normalize use of backtrack, last_event_id and if_modified_since/if_none_match values to get old messages on all subscriber modes
* Added push_stream_last_event_id directive to make possible pass the Last-Event-Id value without set header
* Changed push_stream_store_messages directive to make possible set it inside an if block
* Renamed broadcast feature to wildcard, more adequate with the way it works
** push_stream_broadcast_channel_prefix -> push_stream_wildcard_channel_prefix
** push_stream_broadcast_channel_max_qtd -> push_stream_wildcard_channel_max_qtd
** push_stream_max_number_of_broadcast_channels -> push_stream_max_number_of_wildcard_channels
* Removed push_stream_content_type directive, use default_type Nginx directive to set the value, except on JSONP and Event Source modes
* Removed push_stream_keepalive directive, let Nginx decide when to use keepalive and how many requests accept using keepalive_* directives
* Removed push_stream_shared_memory_cleanup_objects_ttl directive
* Changed push_stream_websocket directive to be a subtype of push_stream_subscriber directive
* Changed push_stream_eventsource_support directive to be a subtype of push_stream_subscriber directive
* Fix to support gzip usage
* Added the feature to send a custom 'channel delete message' on the body of the DELETE request
* Removed push_stream_channel_id variable, use the push_stream_channels_path instead of it
* Changed push_stream_channels_path variable to directive, and make possible set it inside an if block
* Back to use Nginx chunked filter

h2. Version 0.3.5

* Use JSONP when port numbers don't match.
* Set expires headers to avoid cache
* Add push_stream_channel_info_on_publish, push_stream_channel_inactivity_time and push_stream_allowed_origins directives
* Not sending the access control headers by default, send only when the allowed_origins directive is set, for security reasons
* Send a ping frame as feedback when publishing a message through WebSocket connection
* Adding the number of stored messages and the number of channels and messages in the trash to summarized channels statistics
* Remove default header template for EventSource subscribers
* Force content type as application/javascript on jsonp requests
* Simplifying some internal structures
* Fix memory leak when use the feature of do a DELETE in a channel
* Fix memory leak which happens after a worker dies or the server receive the SIGHUP (reload) signal (Thanks _Rob Mueller_ , _Bron Gondwana_ , _Andrew Wansink_ and their team)
* Fix status change notification when the server is stopped on long polling and jsonp modes (Thanks _nickiv_ for bug report on IE)
* Fix domain set for xss on pushstream.js when domain has more than three parts (Thanks _Sebastien_)
* Adding function to ensure dates with two digits days on long polling requests (Thanks _Dunaeth_ for bug report on IE)
* Avoiding unescape of not string messages on pushstream.js (Thanks _karolciba_)

h2. Version 0.3.4

* Improvement on javascript cleanup objects
* Fixing initial temp pool size
* Fixing memory leak when recovering channel from trash, the workers_with_subscribers queue was wrongly reinitialized without free the memory on it
* Changed default value of push_stream_message_ttl to 30 minutes to avoid memory leak of a message which is never discarded
* Changed javascript configurations to be more flexible
* Changed JSONP to receive old messages as array
* Changed channels ids parser for a smarter version, using regular expression

h2. Version 0.3.3

* Adding JSONP support to pushstream.js and dynamically callback parameter
* Adding event type feature to Event Source support
* Adding tag and time available at message template, and make possible pass these values without set headers
* Adding a reference count to the message to avoid discard it before be processed for all workers
* Adding padding messages based on user agent to bypass some problems on android/safari browsers on long-polling
* Improvement on memory usage to reuse chains and buffers
* Improvement on javascript message parser regexp
* Improvement on sending alert messages to workers only when necessary
* Improvement on reset ping timer when a message is sent
* Improvement on disconnect any subscriber which receives a non OK response when writing to its socket
* Improvement on documentation organization
* Improvement on preventing XSS when using pushstream.js
* Fixing memory leak when saving channels on a rbtree with ids which collides, problem inherited from Nginx and reported by Lanshun Zhou
* Fixing memory leak in javascript
* Fixing read messages in high throughput using keepalive on
* Fixing EventSourceWrapper class on pushstream.js to use native reconnection feature from EventSource

h2. Version 0.3.2

* Adding WebSocket support
* Adding a default header template for EventSource to call _onopen_ callback quickly
* Adding examples of use for PushStream javascript class
* Refactor on PushStream javascript class adding support for new protocols
* Changing etag for messages published in different channels to receive sequential values if they were published on same second
* Improvement on delete channel removing unnecessary loop
* Fixing bug on delete channel with long polling subscribers

h2. Version 0.3.1

* Adding _push_stream_longpolling_connection_ttl_ directive to be possible use different values for timeout of stream and long polling subscribers on the same location
* Adding _push_stream_max_subscribers_per_channel_ directive to limit the number of subscribers per channel
* Enabling some directives to be used on location context, now this works as expected
** push_stream_ping_message_interval
** push_stream_subscriber_connection_ttl
* Replace ping and disconnect routines by individual timers in each request, it make disconnect timeout more accurate
* Finalizing failed connections on sending messages or ping to subscribers, it prevent leak of writing connections using HTTPS
* Fixing delivery message when etag from newer message is lower than an old message
* Fixing cleanup messages when only use max_messages_stored_per_channel directive
* Fixing bug on ping and disconnect timers behavior when working with long polling subscribers
* Fixing bug on init and exit worker to execute module code only on SINGLE or WORKER process, to be possible use the module and proxy cache on the same nginx

h2. Version 0.3.0

* Adding Event Source support
* Adding Polling support
* Adding Long Polling support
* Moving some directives to be used on http context instead of location
** push_stream_min_message_buffer_timeout
** push_stream_max_message_buffer_length
** push_stream_max_channel_id_length
** push_stream_ping_message_interval
** push_stream_subscriber_connection_timeout
** push_stream_broadcast_channel_prefix
** push_stream_max_number_of_channels
** push_stream_max_number_of_broadcast_channels
* Renaming some directives
** push_stream_max_reserved_memory -> push_stream_shared_memory_size
** push_stream_memory_cleanup_timeout -> push_stream_shared_memory_cleanup_objects_ttl
** push_stream_min_message_buffer_timeout -> push_stream_message_ttl
** push_stream_max_message_buffer_length -> push_stream_max_messages_stored_per_channel
** push_stream_subscriber_connection_timeout -> push_stream_subscriber_connection_ttl

h2. Version 0.2.7

* Adding uptime information for server and workers on statistics
* Avoiding counters to overlap on decrement

h2. Version 0.2.6

* Adding directive push_stream_footer_template to send a text to subscriber before close connection (channel delete or subscriber timeout)
* Adding support to retrieve old messages using If-Modified-Since header
* Fixing bug on some points which does not check if alloc memory was done successful
* Fixing bug on PushStream.js to work on Internet Explorer 9

h2. Version 0.2.5

* Adding directives to change text for channel deleted and ping messages
* Adding feature to get channels statistics by prefix (Suggested by Alexey Vdovin)
* Adding publisher administrator feature to delete channels (Suggested by Alexey Vdovin)
* Fixing bug which removed default message template
* Fixing messages sent to subscribers to be a truly transfer encoding chunked connection
* Removing support for versions 0.7.x
* Removing hack to keep connection open (Thanks _Maxim Dounin_)

h2. Version 0.2.4

* Adding keepalive support
* Fixing bug when reloading nginx configuration file (Thanks _Rob Mueller_ for bug report)

h2. Version 0.2.3

* Fixing bug to accept different message templates on different subscriber locations (Now you CAN remove push_stream_message_template directive from publisher location, it will not be used there)
* Fixing bug on publisher which let too many open connections with fast publishers on some nginx versions
* Fixing bug of segfault when the module is part of nginx but not in use (Thanks _Rob Mueller_ for bug report)
* Fixing bug when store message is off, memory of messages was not free after sent to subscribers

h2. Version 0.2.2

* Fixing bug when apply message and channel name to template with values containing the same template pattern, could result in 100% of memory and CPU consumption, by recursion
* Fixing bug when manipulating a channel which was removed from tree for another worker (the 100% CPU bug)
* Fixing memory allocation for channel id
* Fixing response for detailed channels statistics when have a big number of channels
* Creating different timers to clear the memory, one for expired messages and another for empty channels
* Disable Nginx chunked filter for module locations

h2. Version 0.2.1

* Fixing bug on return for publisher, was rejecting the message for some clients
* Fixing bug on allocation memory of ngx_str_t variables to ensure that has a char \0 at the end of each of them
* Adding instruction to discard body, to release the connection as soon as possible
* Adding license information
* Organizing test suite

h2. Version 0.2.0

* Fixing bugs on release shared memory
* Fixing bug on receive POST with empty message
* Adding a different location to get channels statistics *push_stream_channels_statistics*
* Adding new directives push_stream_max_number_of_channels, push_stream_max_number_of_broadcast_channels and push_stream_memory_cleanup_timeout
* Removed support to PUT and DELETE http methods on publisher location
* Removed different types of return on publishing messages in case that was published on a empty channel or on one which has subscribers
* Removed directive push_stream_subscriber_disconnect_interval, this interval is calculate based on push_stream_subscriber_connection_timeout
* Removed directive push_stream_min_message_buffer_length
* Change default values of some directives

(head). | directive | old value | new value |
|push_stream_min_message_buffer_timeout|7200 seconds|_unset_|
|push_stream_max_message_buffer_length|10|_unset_|
|push_stream_authorized_channels_only|on|off|
|push_stream_store_messages|on|off|
|push_stream_max_channel_id_length|1024 bytes|_unset_|
|push_stream_broadcast_channel_max_qtd|1|_unset_|

h2. Version 0.1.0

Initial version of this module was based on "pushmodule":http://pushmodule.slact.net
