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first pass at Comet plugin; doesn't yet update

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This commit is contained in:
Evan Prodromou 2009-04-25 14:20:24 -04:00
parent 83ba1b0b5e
commit 5e6eb27f84
5 changed files with 756 additions and 0 deletions
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138
plugins/Comet/CometPlugin.php Normal file
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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Plugin to do "real time" updates using Comet/Bayeux
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Plugin
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @copyright 2009 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
/**
* Plugin to do realtime updates using Comet
*
* @category Plugin
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
class CometPlugin extends Plugin
{
var $server = null;
function __construct($server=null)
{
$this->server = $server;
parent::__construct();
}
function onEndShowScripts($action)
{
$timeline = null;
switch ($action->trimmed('action')) {
case 'public':
$timeline = '/timelines/public';
break;
default:
return true;
}
$action->element('script', array('type' => 'text/javascript',
'src' => common_path('plugins/Comet/jquery.comet.js')),
' ');
$action->elementStart('script', array('type' => 'text/javascript'));
$action->raw("var _timelineServer = \"$this->server\"; ".
"var _timeline = \"$timeline\";");
$action->elementEnd('script');
$action->element('script', array('type' => 'text/javascript',
'src' => common_path('plugins/Comet/updatetimeline.js')),
' ');
return true;
}
function onEndNoticeSave($notice)
{
$this->log(LOG_INFO, "Called for save notice.");
$timelines = array();
// XXX: Add other timelines; this is just for the public one
if ($notice->is_local ||
($notice->is_local == 0 && !common_config('public', 'localonly'))) {
$timelines[] = '/timelines/public';
}
if (count($timelines) > 0) {
// Require this, since we need it
require_once(INSTALLDIR.'/plugins/Comet/bayeux.class.inc.php');
$json = $this->noticeAsJson($notice);
$this->log(LOG_DEBUG, "JSON = '$json'");
// Bayeux? Comet? Huh? These terms confuse me
$bay = new Bayeux($this->server);
foreach ($timelines as $timeline) {
$this->log(LOG_INFO, "Posting notice $notice->id to '$timeline'.");
$bay->publish($timeline, $json);
$this->log(LOG_DEBUG, "Done posting notice $notice->id to '$timeline'.");
}
$bay = NULL;
}
$this->log(LOG_DEBUG, "All done.");
return true;
}
function noticeAsJson($notice)
{
// FIXME: this code should be abstracted to a neutral third
// party, like Notice::asJson(). I'm not sure of the ethics
// of refactoring from within a plugin, so I'm just abusing
// the TwitterApiAction method. Don't do this unless you're me!
require_once(INSTALLDIR.'/lib/twitterapi.php');
$act = new TwitterApiAction('/dev/null');
$arr = $act->twitter_status_array($notice, true);
return $arr;
}
// Push this up to Plugin
function log($level, $msg)
{
common_log($level, get_class($this) . ': '.$msg);
}
}

129
plugins/Comet/bayeux.class.inc.php Normal file
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<?php
/*
*
* Phomet: a php comet client
*
* Copyright (C) 2008 Morgan 'ARR!' Allen <morganrallen@gmail.com> http://morglog.alleycatracing.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
class Bayeux
{
private $oCurl = '';
private $nNextId = 0;
public $sUrl = '';
function __construct($sUrl)
{
$this->sUrl = $sUrl;
$this->oCurl = curl_init();
$aHeaders = array();
$aHeaders[] = 'Connection: Keep-Alive';
curl_setopt($this->oCurl, CURLOPT_URL, $sUrl);
curl_setopt($this->oCurl, CURLOPT_HTTPHEADER, $aHeaders);
curl_setopt($this->oCurl, CURLOPT_HEADER, 0);
curl_setopt($this->oCurl, CURLOPT_POST, 1);
curl_setopt($this->oCurl, CURLOPT_RETURNTRANSFER,1);
$this->handShake();
}
function __destruct()
{
$this->disconnect();
}
function handShake()
{
$msgHandshake = array();
$msgHandshake['channel'] = '/meta/handshake';
$msgHandshake['version'] = "1.0";
$msgHandshake['minimumVersion'] = "0.9";
$msgHandshake['supportedConnectionTypes'] = array('long-polling');
$msgHandshake['id'] = $this->nNextId++;
curl_setopt($this->oCurl, CURLOPT_POSTFIELDS, "message=".urlencode(str_replace('\\', '', json_encode(array($msgHandshake)))));
$data = curl_exec($this->oCurl);
if(curl_errno($this->oCurl))
die("Error: " . curl_error($this->oCurl));
$oReturn = json_decode($data);
common_debug(print_r($oReturn, true));
if (is_array($oReturn)) {
$oReturn = $oReturn[0];
}
$bSuccessful = ($oReturn->successful) ? true : false;
if($bSuccessful)
{
$this->clientId = $oReturn->clientId;
$this->connect();
}
}
public function connect()
{
$aMsg['channel'] = '/meta/connect';
$aMsg['id'] = $this->nNextId++;
$aMsg['clientId'] = $this->clientId;
$aMsg['connectionType'] = 'long-polling';
curl_setopt($this->oCurl, CURLOPT_POSTFIELDS, "message=".urlencode(str_replace('\\', '', json_encode(array($aMsg)))));
$data = curl_exec($this->oCurl);
}
function disconnect()
{
$msgHandshake = array();
$msgHandshake['channel'] = '/meta/disconnect';
$msgHandshake['id'] = $this->nNextId++;
$msgHandshake['clientId'] = $this->clientId;
curl_setopt($this->oCurl, CURLOPT_POSTFIELDS, "message=".urlencode(str_replace('\\', '', json_encode(array($msgHandshake)))));
curl_exec($this->oCurl);
}
public function publish($sChannel, $oData)
{
if(!$sChannel || !$oData)
return;
$aMsg = array();
$aMsg['channel'] = $sChannel;
$aMsg['id'] = $this->nNextId++;
$aMsg['data'] = $oData;
$aMsg['clientId'] = $this->clientId;
curl_setopt($this->oCurl, CURLOPT_POSTFIELDS, "message=".urlencode(str_replace('\\', '', json_encode(array($aMsg)))));
$data = curl_exec($this->oCurl);
// var_dump($data);
}
}

123
plugins/Comet/bayeux.class.inc.phps Normal file
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<?php
/*
*
* Phomet: a php comet client
*
* Copyright (C) 2008 Morgan 'ARR!' Allen <morganrallen@gmail.com> http://morglog.alleycatracing.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
class Bayeux
{
private $oCurl = '';
private $nNextId = 0;
public $sUrl = '';
function __construct($sUrl)
{
$this->sUrl = $sUrl;
$this->oCurl = curl_init();
$aHeaders = array();
$aHeaders[] = 'Connection: Keep-Alive';
curl_setopt($this->oCurl, CURLOPT_URL, $sUrl);
curl_setopt($this->oCurl, CURLOPT_HTTPHEADER, $aHeaders);
curl_setopt($this->oCurl, CURLOPT_HEADER, 0);
curl_setopt($this->oCurl, CURLOPT_POST, 1);
curl_setopt($this->oCurl, CURLOPT_RETURNTRANSFER,1);
$this->handShake();
}
function __destruct()
{
$this->disconnect();
}
function handShake()
{
$msgHandshake = array();
$msgHandshake['channel'] = '/meta/handshake';
$msgHandshake['version'] = "1.0";
$msgHandshake['minimumVersion'] = "0.9";
$msgHandshake['id'] = $this->nNextId++;
curl_setopt($this->oCurl, CURLOPT_POSTFIELDS, "message=".urlencode(str_replace('\\', '', json_encode(array($msgHandshake)))));
$data = curl_exec($this->oCurl);
if(curl_errno($this->oCurl))
die("Error: " . curl_error($this->oCurl));
$oReturn = json_decode($data);
$oReturn = $oReturn[0];
$bSuccessful = ($oReturn->successful) ? true : false;
if($bSuccessful)
{
$this->clientId = $oReturn->clientId;
$this->connect();
}
}
public function connect()
{
$aMsg['channel'] = '/meta/connect';
$aMsg['id'] = $this->nNextId++;
$aMsg['clientId'] = $this->clientId;
$aMsg['connectionType'] = 'long-polling';
curl_setopt($this->oCurl, CURLOPT_POSTFIELDS, "message=".urlencode(str_replace('\\', '', json_encode(array($aMsg)))));
$data = curl_exec($this->oCurl);
}
function disconnect()
{
$msgHandshake = array();
$msgHandshake['channel'] = '/meta/disconnect';
$msgHandshake['id'] = $this->nNextId++;
$msgHandshake['clientId'] = $this->clientId;
curl_setopt($this->oCurl, CURLOPT_POSTFIELDS, "message=".urlencode(str_replace('\\', '', json_encode(array($msgHandshake)))));
curl_exec($this->oCurl);
}
public function publish($sChannel, $oData)
{
if(!$sChannel || !$oData)
return;
$aMsg = array();
$aMsg['channel'] = $sChannel;
$aMsg['id'] = $this->nNextId++;
$aMsg['data'] = $oData;
$aMsg['clientId'] = $this->clientId;
curl_setopt($this->oCurl, CURLOPT_POSTFIELDS, "message=".urlencode(str_replace('\\', '', json_encode(array($aMsg)))));
$data = curl_exec($this->oCurl);
// var_dump($data);
}
}

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plugins/Comet/jquery.comet.js Normal file
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(function($)
{
var msgHandshake =
{
version: '1.0',
minimumVersion: '0.9',
channel: '/meta/handshake'
};
var oTransport = function()
{
this._bXD =
(($.comet._sUrl.substring(0,4) == 'http') && ($.comet._sUrl.substr(7,location.href.length).replace(/\/.*/, '') != location.host))
?
true
:false;
this.connectionType = (this._bXD) ? 'callback-polling' : 'long-polling';
this.startup = function(oReturn)
{
if(this._comet._bConnected) return;
this.tunnelInit();
};
this.tunnelInit = function()
{
var msgConnect =
{
channel: '/meta/connect',
clientId: $.comet.clientId,
id: String($.comet._nNextId++),
connectionType: $.comet._oTransport.connectionType
};
this.openTunnel(msgConnect);
};
this.openTunnel = function(oMsg)
{
$.comet._bPolling = true;
this._send($.comet._sUrl, oMsg, function(sReturn)
{
var oReturn = (typeof sReturn != "object") ? (eval('(' + sReturn + ')')) : sReturn;
$.comet._bPolling = false;
$.comet.deliver(oReturn);
$.comet._oTransport.closeTunnel();
});
};
this.closeTunnel = function()
{
if(!$.comet._bInitialized) return;
if($.comet._advice)
{
if($.comet._advice.reconnect == 'none') return;
if($.comet._advice.interval > 0)
{
setTimeout($.comet._oTransport._connect, $.comet._advice.interval);
}
else
{
$.comet._oTransport._connect();
}
}
else
{
$.comet._oTransport._connect();
}
};
this._connect = function()
{
if(!$.comet._bInitialized) return;
if($.comet._bPolling) return;
if($.comet._advice && $.comet._advice.reconnect == 'handshake')
{
$.comet._bConnected = false;
$.comet.init($.comet._sUrl);
}
else if($.comet._bConnected)
{
var msgConnect =
{
//jsonp: 'test',
clientId: $.comet.clientId,
id: String($.comet._nNextId++),
channel: '/meta/connect',
connectionType: $.comet._oTransport.connectionType
};
$.comet._oTransport.openTunnel(msgConnect);
}
};
this._send = function(sUrl, oMsg, fCallback) {
//default callback will check advice, deliver messages, and reconnect
var fCallback = (fCallback) ? fCallback : function(sReturn)
{
var oReturn = (typeof sReturn != "object") ? (eval('(' + sReturn + ')')) : sReturn;
$.comet.deliver(oReturn);
if($.comet._advice)
{
if($.comet._advice.reconnect == 'none')
return;
if($.comet._advice.interval > 0)
{
setTimeout($.comet._oTransport._connect, $.comet._advice.interval);
}
else
{
$.comet._oTransport._connect();
}
}
else
{
$.comet._oTransport._connect();
}
};
//regular AJAX for same domain calls
if((!this._bXD) && (this.connectionType == 'long-polling'))
{
this._pollRequest = $.ajax({
url: sUrl,
type: 'post',
beforeSend: function(oXhr) { oXhr.setRequestHeader('Connection', 'Keep-Alive'); },
data: { message: JSON.stringify(oMsg) },
success: fCallback
});
}
else // JSONP callback for cross domain
{
this._pollRequest = $.ajax({
url: sUrl,
dataType: 'jsonp',
jsonp: 'jsonp',
beforeSend: function(oXhr) { oXhr.setRequestHeader('Connection', 'Keep-Alive'); },
data:
{
message: JSON.stringify($.extend(oMsg,{connectionType: 'callback-polling' }))
},
success: fCallback
});
}
}
};
$.comet = new function()
{
this.CONNECTED = 'CONNECTED';
this.CONNECTING = 'CONNECTING';
this.DISCONNECTED = 'DISCONNECTED';
this.DISCONNECTING = 'DISCONNECTING';
this._aMessageQueue = [];
this._aSubscriptions = [];
this._aSubscriptionCallbacks = [];
this._bInitialized = false;
this._bConnected = false;
this._nBatch = 0;
this._nNextId = 0;
// just define the transport, do not assign it yet.
this._oTransport = ''; //oTransport;
this._sUrl = '';
this.supportedConectionTypes = [ 'long-polling', 'callback-polling' ];
this.clientId = '';
this._bTrigger = true; // this sends $.event.trigger(channel, data)
this.init = function(sUrl)
{
this._sUrl = (sUrl) ? sUrl : '/cometd';
this._oTransport = new oTransport();
this._aMessageQueue = [];
this._aSubscriptions = [];
this._bInitialized = true;
this.startBatch();
var oMsg = $.extend(msgHandshake, {id: String(this._nNextId++)});
this._oTransport._send(this._sUrl, oMsg, $.comet._finishInit);
};
this._finishInit = function(sReturn)
{
var oReturn = (typeof sReturn != "object") ? (eval('(' + sReturn + ')')[0]) : sReturn[0];
if(oReturn.advice)
$.comet._advice = oReturn.advice;
var bSuccess = (oReturn.successful) ? oReturn.successful : false;
// do version check
if(bSuccess)
{
// pick transport ?
// ......
$.comet._oTransport._comet = $.comet;
$.comet._oTransport.version = $.comet.version;
$.comet.clientId = oReturn.clientId;
$.comet._oTransport.startup(oReturn);
$.comet.endBatch();
}
};
this._sendMessage = function(oMsg)
{
if($.comet._nBatch <= 0)
{
if(oMsg.length > 0)
for(var i in oMsg)
{
oMsg[i].clientId = String($.comet.clientId);
oMsg[i].id = String($.comet._nNextId++);
}
else
{
oMsg.clientId = String($.comet.clientId);
oMsg.id = String($.comet._nNextId++);
}
$.comet._oTransport._send($.comet._sUrl, oMsg);
}
else
{
$.comet._aMessageQueue.push(oMsg);
}
};
this.startBatch = function() { this._nBatch++ };
this.endBatch = function() {
if(--this._nBatch <= 0)
{
this._nBatch = 0;
if(this._aMessageQueue.length > 0)
{
this._sendMessage(this._aMessageQueue);
this._aMessageQueue = [];
}
}
};
this.subscribe = function(sSubscription, fCallback)
{
// if this topic has not been subscribed to yet, send the message now
if(!this._aSubscriptions[sSubscription])
{
this._aSubscriptions.push(sSubscription)
if (fCallback) {
this._aSubscriptionCallbacks[sSubscription] = fCallback;
}
this._sendMessage({ channel: '/meta/subscribe', subscription: sSubscription });
}
//$.event.add(window, sSubscription, fCallback);
};
this.unsubscribe = function(sSubscription) {
$.comet._sendMessage({ channel: '/meta/unsubscribe', subscription: sSubscription });
};
this.publish = function(sChannel, oData)
{
$.comet._sendMessage({channel: sChannel, data: oData});
};
this.deliver = function(sReturn)
{
var oReturn = sReturn;//eval(sReturn);
$(oReturn).each(function()
{
$.comet._deliver(this);
});
};
this.disconnect = function()
{
$($.comet._aSubscriptions).each(function(i)
{
$.comet.unsubscribe($.comet._aSubscriptions[i]);
});
$.comet._sendMessage({channel:'/meta/disconnect'});
$.comet._bInitialized = false;
}
this._deliver = function(oMsg,oData)
{
if(oMsg.advice)
{
$.comet._advice = oMsg.advice;
}
switch(oMsg.channel)
{
case '/meta/connect':
if(oMsg.successful && !$.comet._bConnected)
{
$.comet._bConnected = $.comet._bInitialized;
$.comet.endBatch();
/*
$.comet._sendMessage(msgConnect);
*/
}
else
{}
//$.comet._bConnected = false;
break;
// add in subscription handling stuff
case '/meta/subscribe':
if(!oMsg.successful)
{
$.comet._oTransport._cancelConnect();
return;
}
break;
case '/meta/unsubscribe':
if(!oMsg.successful)
{
$.comet._oTransport._cancelConnect();
return;
}
break;
}
if(oMsg.data)
{
if($.comet._bTrigger)
{
$.event.trigger(oMsg.channel, [oMsg]);
}
var cb = $.comet._aSubscriptionCallbacks[oMsg.channel];
if (cb) {
cb(oMsg);
}
}
};
};
})(jQuery);

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plugins/Comet/updatetimeline.js Normal file
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// update the local timeline from a Comet server
//