Privoxy, Tor and cURL using Zend HTTP - php

Question

I am really stuck in this, and need expert help. Let me explain what I am trying achieve and the setup. I had a script which posts over a https form using Zend_Http_Client. On the server setup I have tor & privoxy running. Everything just worked fine, but now I need to make the code more scalable by running multiple instances of tor & privoxy on the same server.
Hence I shifted the Adapter for Zend from Zend_Http_Client_Adapter_Curl to Zend_Http_Client_Adapter_Proxy . But after changing the adapter I have bumped into a strange error which says - 400 Invalid header received from client and when I dump the object of Zend client, I see the following -
MyWebClientResponse::__set_state(array(
'json' => NULL,
'version' => '1.1',
'code' => 400,
'message' => 'Invalid header received from client',
'headers' =>
array (
'Proxy-agent' => 'Privoxy 3.0.19',
'Content-type' => 'text/plain',
'Connection' => 'close',
),
'body' => 'Invalid header received from client.
',
))
I do not understand what is that I am doing wrong. The code is done in Yii Framework so it is hard to share all the classes and Models, but I am sharing the main parts of the code, which are responsible for this -
$client = MyWebClient::factory();
$adapter = $client->getAdapter();
$adapter->setConfig(array('timeout' => 120,
'proxy_host' => 'localhost',
'proxy_port' => 8124
));
$client->setAdapter($adapter);
$client->setCookieJar(true);
$client->setParameterPost(array(
'name' => 'firstname',
'password' => 'password,
'login' => 'home'
));
$response = $client->setUri('https://www.domain.com/post.php')->requestApi('POST', false);
Here's the constructor of the class MyWebClient, just in case it it required, all other methods are standard.
static public function factory($new = false)
{
if (!isset(self::$client))
{
self::$client = new MyWebClient();
self::$client->setConfig(array(
'adapter' => 'Zend_Http_Client_Adapter_Proxy',
// 'proxy_host' => 'localhost',
// 'proxy_port' => 8118,
'persistent' => false,
'timeout' => 120
));
}
return self::$client;
}
The headers are being set in the requestAPI method and the snippet is -
$headers = array(
'X-PHX' => 'true',
'X-Requested-With' => 'XMLHttpRequest',
'Referer' => 'https://domain.com/index.html',
'User-Agent' => self::getRandomUserAgent()
);
$this->setHeaders($headers);
I would really appreciate help in this regard. Think it's privoxy which is not letting go the request out of the server.
Sachin

Answer 1

Looks like you may need to wrap the user-agent with quotes. Try this when setting the headers and see if that fixes the problem.
$headers = array(
'X-PHX' => 'true',
'X-Requested-With' => 'XMLHttpRequest',
'Referer' => 'https://domain.com/index.html',
'User-Agent' => "'".self::getRandomUserAgent()."'"
);
$this->setHeaders($headers);

Answer 2

Finally I decided to use the native cURL library and the cookieJar which comes with it. It worked like expected.
Cheers,
Sachin