Added configuration method to allow proxy for api client

lib/ApiClient.php

@@ -182,6 +182,11 @@ public function callApi($resourcePath, $method, $queryParams, $postData, $header
             curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
         }
 
+        // set proxy
+        if (!empty($this->config->getProxy())) {
+            curl_setopt($curl, CURLOPT_PROXY, $this->config->getProxy());
+        }
+
         if (!empty($queryParams)) {
             $url = ($url . '?' . http_build_query($queryParams));
         }

lib/Configuration.php

@@ -141,6 +141,11 @@ class Configuration
      */
     protected $sslVerification = true;
 
+    /**
+     * The HTTP proxy to tunnel requests through
+     */
+    protected $proxy = '';
+
     /**
      * Constructor
      */
@@ -479,6 +484,24 @@ public function getSSLVerification()
         return $this->sslVerification;
     }
 
+    /**
+     * Sets HTTP proxy to tunnel the request through
+     * @param string $proxy
+     */
+    public function setProxy($proxy)
+    {
+        $this->proxy = $proxy;
+    }
+
+    /**
+     * Gets HTTP proxy used to tunnel the request through
+     * @return string HTTP proxy
+     */
+    public function getProxy()
+    {
+        return $this->proxy;
+    }
+
     /**
      * Gets the default configuration instance
      *