HTTP proxy support

[sharklasersninja]

The attached patch adds simple http proxy support.

diff --git a/php-ga/src/GoogleAnalytics/Config.php b/php-ga/src/GoogleAnalytics/Config.php
index 7f19142..c0b51f0 100644
--- a/php-ga/src/GoogleAnalytics/Config.php
+++ b/php-ga/src/GoogleAnalytics/Config.php
@@ -113,6 +113,14 @@ class Config {
         * @var string
         */
        protected $endPointHost = 'www.google-analytics.com';
+
+       /**
+        * Connect to $endPointHost through this proxy
+        *
+        * @see Internals\Request\HttpRequest::send()
+        * @var string
+        */
+       protected $httpProxy = null;

        /**
         * Google Analytics tracking request endpoint path
@@ -290,6 +298,21 @@ class Config {
                $this->sitespeedSampleRate = (int)$sitespeedSampleRate;
        }

+       /**
+        * @return string
+        */
+       public function getHttpProxy() {
+               return $this->httpProxy;
+       }
+
+       /**
+        * @param string $host
+        * @param int $port
+        */
+       public function setHttpProxy($host, $port) {
+               $this->httpProxy = sprintf('%s:%d', $host, $port);
+       }
+
 }

 ?>
\ No newline at end of file
diff --git a/php-ga/src/GoogleAnalytics/Internals/Request/HttpRequest.php b/php-ga/src/GoogleAnalytics/Internals/Request/HttpRequest.php
index 2ba81ae..60bf47a 100644
--- a/php-ga/src/GoogleAnalytics/Internals/Request/HttpRequest.php
+++ b/php-ga/src/GoogleAnalytics/Internals/Request/HttpRequest.php
@@ -121,10 +121,10 @@ abstract class HttpRequest {
                $usePost = strlen($queryString) > 2036;

                if(!$usePost) {
-                       $r = 'GET ' . $this->config->getEndpointPath() . '?' . $queryString . ' HTTP/1.0' . "\r\n";
+                       $r = 'GET ' . "http://" . $this->config->getEndpointHost() . $this->config->getEndpointPath() . '?' . $queryString . ' HTTP/1.0' . "\r\n";
                } else {
                        // FIXME: The "/p" shouldn't be hardcoded here, instead we need a GET and a POST endpoint...
-                       $r = 'POST /p' . $this->config->getEndpointPath() . ' HTTP/1.0' . "\r\n";
+                       $r = 'POST ' . "http://" . $this->config->getEndpointHost() . "/p" . $this->config->getEndpointPath() . ' HTTP/1.0' . "\r\n";
                }
                $r .= 'Host: ' . $this->config->getEndpointHost() . "\r\n";

@@ -180,7 +180,14 @@ abstract class HttpRequest {
                if($this->config->getEndpointHost() !== null) {
                        $timeout = $this->config->getRequestTimeout();

-                       $socket = fsockopen($this->config->getEndpointHost(), 80, $errno, $errstr, $timeout);
+                       $proxy = $this->config->getHttpProxy();
+                       if ($proxy) {
+                               list($host, $port) = explode(':', $proxy);
+                       } else  {
+                               $host = $this->config->getEndpointHost();
+                               $port = 80;
+                       }
+                       $socket = fsockopen($host, $port, $errno, $errstr, $timeout);
                        if(!$socket) return false;

                        if($this->config->getFireAndForget()) {