Switch to Guzzle for HTTP requests

.gitignore

+composer.lock
+vendor

composer.json

@@ -5,5 +5,8 @@
     "psr-4": {
       "AttachmentsClient\\": "src/"
     }
+  },
+  "require": {
+    "guzzlehttp/guzzle": "^6.3"
   }
 }

src/AttachmentsClient.php

 <?php
+
 namespace AttachmentsClient;
 
+require('vendor/autoload.php');
+
+use GuzzleHttp\Client;
 
 class AttachmentsClient {
   private $baseUrl;
+  private $client;
 
   function __construct ($baseUrl) {
     $this->baseUrl = $this->ensureNotEndsWithSlash($baseUrl);
+    $this->client = new Client();
   }
 
   // *** Public API methods ***
 
   /**
-   * Uploads a file to attachments server.
+   * Uploads a file from filesystem to attachments server.
    * 
    * @param string $filename Path to file to be uploaded
    * 
    * @return string Hash of uploaded file
    */
   public function uploadFromFile ($filename) {
-    $data = new \CurlFile($filename);
-    return $this->uploadFromMemory($data);    
+    $data = file_get_contents($filename);
+    return $this->uploadFromMemory($data, basename($filename));    
   }
 
   /**
    * Uploads data from memory to attachments server.
    * 
    * @param string $file File data to be uploaded, stored in memory
+   * @param string $name (optional) Name of file to be passed to server
    * 
    * @return string Hash of uploaded file
    */
-  public function uploadFromMemory ($data) {
+  public function uploadFromMemory ($data, $name = 'file') {
     $url = $this->getFullMethodUrl('/ul');
-    $result = $this->sendPostRequest($url, $data);
+    $result = $this->sendPostRequestWithFile ($url, $data, $name);
 
     $json = json_decode($result, true);
     return $json['id'];
@@ -48,22 +55,29 @@ class AttachmentsClient {
     return $this->baseUrl . $method;
   }
 
-  private function sendPostRequest ($url, $data) {
-    $fields = array(
-      'file' => $data
-    );
+  private function sendPostRequestWithFile ($url, $file, $name) {
+    $response = $this->client->request('POST', $url, [
+      'multipart' => [
+        [
+          'name'     => 'file',
+          'contents' => $file,
+          'filename' => $name
+        ]
+      ]
+    ]);
 
-    $ch = curl_init();
-    curl_setopt($ch, CURLOPT_URL, $url);
-    curl_setopt($ch, CURLOPT_POST, 1);
-    curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
-    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: multipart/form-data')); 
-    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+    echo $response->getBody();
 
-    $result = curl_exec($ch);
-    curl_close($ch);
+    if ($response->getStatusCode() !== 200) {
+      $message =
+        'File uploading failed: server returned ' . 
+        $response->getStatusCode() .
+        ' and body: ' .
+        $response->getBody();
+      throw new Exception($message);
+    }
 
-    return $result;
+    return $response->getBody();
   }
 }