Drupal 7 and Services 3 - How to Upload file / image

drupal7-services3-upload-files-images.php

<?php

/**
 * This is a code sample for how to upload file to drupal services.
 * 
 * This code sample focuses on uploading files and assumes that you are successfully autheticated.
 */

$httpMethod = 'POST';
$resourceUrl = 'http://example.com/api/file';
$headers = array(
    'Content-Type: application/json',
    'X-CSRF-TOKEN: ABC-MNO-XYZ',
);

$filePath = "/path/to/file.txt";
$requestFields = array(
    'filename'      => basename($filePath),
    'filesize'      => filesize($filePath),
    'file'          => base64_encode(file_get_contents($filePath)),
);

$curl = curl_init($resourceUrl);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_FAILONERROR, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_HEADER, FALSE);
curl_setopt($curl, CURLINFO_HEADER_OUT, true);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $httpMethod);
curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($requestFields));
$response = curl_exec($curl);
curl_close($curl);

$result = json_decode($response);
$newFileId = $result->fid;
$newFileUri = $result->uri;