Add support for compressing post payload

Author: glensc

src/Saver/UploadSaver.php

@@ -10,15 +10,18 @@ class UploadSaver implements SaverInterface
     private $url;
     /** @var int */
     private $timeout;
+    /** @var bool */
+    private $compress;
 
-    public function __construct($url, $token, $timeout)
+    public function __construct($url, $token, $timeout, $compress = false)
     {
         $this->url = $url;
         if ($token) {
             $this->url .= '?&token=' . $token;
         }
 
         $this->timeout = $timeout;
+        $this->compress = $compress;
     }
 
     public function isSupported()
@@ -29,16 +32,17 @@ public function isSupported()
     public function save(array $data)
     {
         $json = json_encode($data);
-        $this->submit($this->url, $json);
+        $this->submit($this->url, $json, $this->compress);
 
         return true;
     }
 
     /**
      * @param string $url
      * @param string $payload
+     * @param bool $compress
      */
-    private function submit($url, $payload)
+    private function submit($url, $payload, $compress)
     {
         $ch = curl_init($url);
         if (!$ch) {
@@ -49,13 +53,13 @@ private function submit($url, $payload)
             // Prefer to receive JSON back
             'Accept: application/json',
             // The sent data is JSON
-            'Content-Type: application/json',
+            $compress ? 'Content-Type: application/json+gzip' : 'Content-Type: application/json',
         );
 
         $res = curl_setopt_array($ch, array(
             CURLOPT_CUSTOMREQUEST => 'POST',
             CURLOPT_RETURNTRANSFER => true,
-            CURLOPT_POSTFIELDS => $payload,
+            CURLOPT_POSTFIELDS => $compress ? gzencode($payload) : $payload,
             CURLOPT_FOLLOWLOCATION => 1,
             CURLOPT_HTTPHEADER => $headers,
             CURLOPT_TIMEOUT => $this->timeout,