ActiveSockets

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  1. summary Network Listeners

@@Home -> [Specs] -> [ActiveSockets]


Overview

This feature allows to have unlimited set of connections initiated from aiengine server to external servers.

Implementation Details

 * aiengine creates all active sockets on startup
 * active socket is available via AIMedia interface
 * active socket is available via IO channels if configured
 * inbound stream can be forwarded to configured IO channel
 * stream from specific IO channel can be forwarded to outbound
 * active socket supports protocol configuring - see MediaProtocols Protocols
 * if forwarding inbound stream - creates thread to read from socket and automatically reconnects if connection was broken

Planned but implemented:

 * to have non-persisting connections - to use active connection only after request from server, do not restore connection automatically 
 * timeout for reconnection

Configuration

 * sample configuration for google active socket in media.xml

{{{ <channel name="google" run="true"> <property name="protocol" value="http"/> <property name="protocol.showmessages" value="false"/> <property name="protocol.showpackets" value="false"/> <property name="msgtype" value="text"/> <property name="permanent" value="true"/> <property name="host" value="www.google.com"/> <property name="port" value="80"/> <property name="redirect-in" value="true"/> <property name="redirect-out" value="true"/> <property name="topic-in" value="http.response"/> <property name="topic-out" value="http.request"/> </channel> }}}

 * *host* - host to connect to - now IP-addresses are not supported 
 * *port* - port to connect to
 * *redirect-in* - if "true" then messages are forwarded from socket to IO channel
 * *redirect-out* - if "true" then messages are forwarded from IO channel to socket
 * *topic-in* - channel to write messages received from socket
 * *topic-out* - messages from this channel are sent to socket - see MediaProtocols Protocols
 * *reconnectionTimeout* - if unable to connect to socket, then next attempt is performed only after reconnectionTimeout seconds

How to Test

 * use google active socket and test to read some page:

{{{ INFO: AI console INFO: connected to 87.228.126.111:20001 REQUEST: <xmlcall name="TestDirectChannels-Google" class="TestDirectChannels" method="testRequestPage" requestId="REQ-1">

   <parameters>
       <property name="page" value="http://code.google.com" />
   </parameters>

</xmlcall>

output: RESPONSE: <xmlcallresult requestId="REQ-1" name="TestDirectChannels-Google" status="OK">

   <page>http://code.google.com</page>
   <body><!DOCTYPE html... (omitted)

</xmlcallresult>

INFO: disconnected }}}