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proxy.js
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proxy.js
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(function (module, process) {
'use strict';
var colors = require('colors'),
request = require('./request/main'),
_ = require('underscore'),
Q = require('q'),
events = require('events');
colors.setTheme({
silly:'rainbow',
input:'grey',
verbose:'cyan',
prompt:'grey',
info:'green',
data:'grey',
help:'cyan',
warn:'yellow',
debug:'blue',
error:'red'
});
var translateOptions2Arguments = function (options) {
//used to translate property to cmd line arg
var phantomArgMap = {
'cookiesFile':'cookies-file',
'config': 'config',
'debug': 'debug',
'diskCache':'disk-cache',
'ignoreSslErrors':'ignore-ssl-errors',
'loadImages':'load-images',
'localStoragePath': 'local-storage-path',
'localStorageQuota': 'local-storage-quota',
'localToRemoteUrlAccessEnabled':'local-to-remote-url-access',
'maxDiskCache':'max-disk-cache-size',
'outputEncoding':'output-encoding',
'proxy':'proxy',
'proxyAuth': 'proxy-auth',
'proxyType':'proxy-type',
'scriptEncoding':'script-encoding',
'version':'version',
'webSecurity':'web-security',
'sslProtocol': 'ssl-protocol',
'sslCertificatesPath': 'ssl-certificates-path'
};
//may integrate in future
var defaultoptions = {
'ignoreSslErrors':true,
'localToRemoteUrlAccessEnabled':true,
'cookiesFile':'cookies.txt',
'diskCache':'yes',
'loadImages':'yes',
'localToRemoteUrlAccess':'no',
'maxDiskCache':'50000',
'outputEncoding':'utf8',
'proxy':'0',
'proxyType':'yes',
'scriptEncoding':'yes',
'webSecurity':'no'
};
//map options props to cmd line args for phantom process
var phantomArgs = []
, proxyArgs = [];
for (var k in options) {
if (options.hasOwnProperty(k)) {
if (phantomArgMap[k]) {
phantomArgs.push('--' + phantomArgMap[k] + '=' + options[k]);
} else {
var uncamel = k.replace(/[A-Z]/g, function(c) {
return '-' + c.toLowerCase();
});
proxyArgs.push('--' + uncamel + '=' + options[k]);
}
}
}
return {
phantom: phantomArgs,
proxy: proxyArgs
};
};
// //on exit loop through process array and kill everything
// process.on('exit', function () {
// processArray.forEach(function (proc) {
// proc.kill('SIGHUP');
// });
// });
//creates a new phantomjs process
var createServer = function (options, callbackFn) {
var Webpage = require('./webpage'),
Phantom = require('./phantom'),
self = this,
streamPosition = 0,
// //pass proxy to callbackFn
// callbackFn.call(self, self.proxy);
//parses a line from phantoms event stream
parseResponse = function (response) {
var parsedEvent;
self.options.debug && console.log('buffer :%s'.grey, response);
try {
parsedEvent = JSON.parse(response);
}
catch (exception) {
console.error(exception.toString().red.bold);
console.error('attempted to parse %s', response);
return;
}
var args = parsedEvent.args;
args.unshift(parsedEvent.type);
self.options.debug && console.log('emitting %s event on %s'.grey, parsedEvent.type, parsedEvent.source);
switch (parsedEvent.source) {
//phantomJs server module started and is listening or failed
case 'phantom' :
self.proxy.phantom.emit.apply(self.proxy.phantom, args);
break;
case 'page' :
self.proxy.page.emit.apply(self.proxy.page, args);
break;
case 'server' :
self.proxy.phantom.emit.apply(self.proxy.phantom, args);
break;
default :
throw new Error('unexpected eventsource:' + parsedEvent.source);
}
};
var spawnNewProcess = function () {
var spawn = require('child_process').spawn,
serverPath = __dirname + '/' + require('path').normalize('./server/index.js');
var args = translateOptions2Arguments(options);
args.proxy.unshift(serverPath, JSON.stringify(options));
var processArgs = args.phantom.concat(args.proxy);
//spawn new process
var phantomjs = spawn(options.phantomjsPath,
processArgs,
{
detached:false,
stdio:
[
process.stdin,
process.stdout,
process.stderr
]
});
// phantomjs.unref && phantomjs.unref();
};
var ensureServerRunning = function () {
pingServer(options, function (result) {
self.options.debug && console.log('pinged server and got back %s', result);
if (result) {
self.options.debug && console.log('server already running... proxy value %s', JSON.stringify(self.proxy));
callbackFn(self.proxy);
}
else {
self.options.debug && console.log('creating a new server, waiting for servercreated event on %s', self.proxy.phantom);
self.proxy.phantom.on('serverCreated', function (result) {
self.options.debug && console.log('server created callback fired with value:%s'.yellow.bold, result);
callbackFn(self.proxy);
});
spawnNewProcess();
}
});
};
//socket io implementation - credit to node-phantom
var socketio = require('socket.io');
var http = require('http');
this.server = http.createServer(function (request, response) {
response.writeHead(200, {"Content-Type":"text/html"});
response.end('<html><head><script src="/socket.io/socket.io.js" type="text/javascript"></script><script type="text/javascript">\n\
window.onload=function(){\n\
var socket = new io.connect("http://" + window.location.hostname);\n\
window.socket = socket;\n\
};\n\
</script></head><body></body></html>');
}).listen();
options.clientPort = this.server.address().port;
var io = socketio.listen(this.server, {'log level':1});
io.sockets.on('connection', function (socket) {
options.debug && console.log('connection'.green);
socket.on('res', function (response) {
var data = JSON.stringify(response);
options.debug && console.log('response: %s'.green, data);
parseResponse(data);
});
});
//create proxy object
self.proxy = {
page:new Webpage(options),
phantom:new Phantom(options),
end:function (endCallback) {
self.end(function () {
endCallback&&endCallback(true);
});
}
};
ensureServerRunning();
},
//use to see if phantom server already runnings
pingServer = function (options, callbackFn) {
var self = this;
request.get(options.hostAndPort + '/ping',
function (error, response) {
if (response && response.statusCode === 200) { //server up
callbackFn && callbackFn.call(self, true);
}
else { //server down
callbackFn.call(self, false);
}
});
return this;
};
module.exports = {
//terminates phantomjs process
end:function (callbackFn) {
var self = this;
request.post(this.options.hostAndPort + '/phantom/functions/exit', {
form:{
}
},
function (error, response, body) {
if (response && response.statusCode === 200) { //server up
self.server.close();
callbackFn && callbackFn.call(self, true);
}
else { //server down
callbackFn.call(self, false);
}
});
},
//creates a new proxy session - creates phantomjs process and webserver module
create:function (options, callbackFn) {
var self = this;
//compensate for optional options parm
if (typeof options === 'function') {
callbackFn = options;
options = {};
}
//assign default port
options.port = options.port || 1061;
options.host = options.host || 'localhost';
options.hostAndPort = 'http://' + options.host + ':' + options.port;
options.eventStreamPath = require('path').normalize(__dirname + '/../temp/events.txt');
options.phantomjsPath = options.phantomjsPath || 'phantomjs';
options.debug && console.log('creating proxy to %s', options.hostAndPort);
this.options = options;
//try starting server
createServer.call(self, options, function (proxy) {
callbackFn.call(self, proxy);
});
return this;//return this to chain end
}};
}
(module, process)
)
;