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libraries/joomla/http/transport/curl.php
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230
libraries/joomla/http/transport/curl.php
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<?php
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/**
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* @package Joomla.Platform
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* @subpackage HTTP
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*
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* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE
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*/
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defined('JPATH_PLATFORM') or die;
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/**
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* HTTP transport class for using cURL.
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*
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* @package Joomla.Platform
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* @subpackage HTTP
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* @since 11.3
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*/
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class JHttpTransportCurl implements JHttpTransport
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{
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/**
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* @var JRegistry The client options.
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* @since 11.3
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*/
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protected $options;
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/**
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* Constructor. CURLOPT_FOLLOWLOCATION must be disabled when open_basedir or safe_mode are enabled.
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*
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* @param JRegistry $options Client options object.
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*
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* @see http://www.php.net/manual/en/function.curl-setopt.php
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* @since 11.3
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* @throws RuntimeException
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*/
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public function __construct(JRegistry $options)
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{
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if (!function_exists('curl_init') || !is_callable('curl_init'))
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{
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throw new RuntimeException('Cannot use a cURL transport when curl_init() is not available.');
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}
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$this->options = $options;
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}
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/**
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* Send a request to the server and return a JHttpResponse object with the response.
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*
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* @param string $method The HTTP method for sending the request.
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* @param JUri $uri The URI to the resource to request.
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* @param mixed $data Either an associative array or a string to be sent with the request.
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* @param array $headers An array of request headers to send with the request.
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* @param integer $timeout Read timeout in seconds.
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* @param string $userAgent The optional user agent string to send with the request.
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*
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* @return JHttpResponse
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*
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* @since 11.3
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*/
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public function request($method, JUri $uri, $data = null, array $headers = null, $timeout = null, $userAgent = null)
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{
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// Setup the cURL handle.
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$ch = curl_init();
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// Set the request method.
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$options[CURLOPT_CUSTOMREQUEST] = strtoupper($method);
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// Don't wait for body when $method is HEAD
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$options[CURLOPT_NOBODY] = ($method === 'HEAD');
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// Initialize the certificate store
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$options[CURLOPT_CAINFO] = $this->options->get('curl.certpath', __DIR__ . '/cacert.pem');
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// If data exists let's encode it and make sure our Content-type header is set.
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if (isset($data))
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{
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// If the data is a scalar value simply add it to the cURL post fields.
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if (is_scalar($data) || (isset($headers['Content-Type']) && strpos($headers['Content-Type'], 'multipart/form-data') === 0))
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{
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$options[CURLOPT_POSTFIELDS] = $data;
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}
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// Otherwise we need to encode the value first.
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else
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{
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$options[CURLOPT_POSTFIELDS] = http_build_query($data);
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}
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if (!isset($headers['Content-Type']))
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{
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$headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=utf-8';
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}
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// Add the relevant headers.
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if (is_scalar($options[CURLOPT_POSTFIELDS]))
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{
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$headers['Content-Length'] = strlen($options[CURLOPT_POSTFIELDS]);
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}
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}
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// Build the headers string for the request.
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$headerArray = array();
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if (isset($headers))
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{
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foreach ($headers as $key => $value)
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{
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$headerArray[] = $key . ': ' . $value;
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}
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// Add the headers string into the stream context options array.
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$options[CURLOPT_HTTPHEADER] = $headerArray;
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}
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// If an explicit timeout is given user it.
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if (isset($timeout))
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{
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$options[CURLOPT_TIMEOUT] = (int) $timeout;
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$options[CURLOPT_CONNECTTIMEOUT] = (int) $timeout;
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}
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// If an explicit user agent is given use it.
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if (isset($userAgent))
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{
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$headers[CURLOPT_USERAGENT] = $userAgent;
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}
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// Set the request URL.
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$options[CURLOPT_URL] = (string) $uri;
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// We want our headers. :-)
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$options[CURLOPT_HEADER] = true;
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// Return it... echoing it would be tacky.
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$options[CURLOPT_RETURNTRANSFER] = true;
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// Override the Expect header to prevent cURL from confusing itself in its own stupidity.
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// Link: http://the-stickman.com/web-development/php-and-curl-disabling-100-continue-header/
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$options[CURLOPT_HTTPHEADER][] = 'Expect:';
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// Follow redirects.
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$options[CURLOPT_FOLLOWLOCATION] = (bool) $this->options->get('follow_location', true);
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// Set the cURL options.
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curl_setopt_array($ch, $options);
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// Execute the request and close the connection.
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$content = curl_exec($ch);
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// Get the request information.
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$info = curl_getinfo($ch);
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// Close the connection.
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curl_close($ch);
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return $this->getResponse($content, $info);
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}
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/**
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* Method to get a response object from a server response.
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*
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* @param string $content The complete server response, including headers.
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* @param array $info The cURL request information.
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*
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* @return JHttpResponse
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*
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* @since 11.3
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* @throws UnexpectedValueException
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*/
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protected function getResponse($content, $info)
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{
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// Create the response object.
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$return = new JHttpResponse;
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// Check if the content is actually a string.
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if (!is_string($content))
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{
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throw new UnexpectedValueException('No HTTP response received.');
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}
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// Get the number of redirects that occurred.
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$redirects = isset($info['redirect_count']) ? $info['redirect_count'] : 0;
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/*
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* Split the response into headers and body. If cURL encountered redirects, the headers for the redirected requests will
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* also be included. So we split the response into header + body + the number of redirects and only use the last two
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* sections which should be the last set of headers and the actual body.
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*/
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$response = explode("\r\n\r\n", $content, 2 + $redirects);
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// Set the body for the response.
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$return->body = array_pop($response);
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// Get the last set of response headers as an array.
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$headers = explode("\r\n", array_pop($response));
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// Get the response code from the first offset of the response headers.
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preg_match('/[0-9]{3}/', array_shift($headers), $matches);
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$code = count($matches) ? $matches[0] : null;
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if (is_numeric($code))
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{
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$return->code = (int) $code;
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}
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// No valid response code was detected.
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else
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{
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throw new UnexpectedValueException('No HTTP response code found.');
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}
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// Add the response headers to the response object.
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foreach ($headers as $header)
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{
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$pos = strpos($header, ':');
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$return->headers[trim(substr($header, 0, $pos))] = trim(substr($header, ($pos + 1)));
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}
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return $return;
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}
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/**
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* Method to check if HTTP transport cURL is available for use
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*
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* @return boolean true if available, else false
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*
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* @since 12.1
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*/
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static public function isSupported()
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{
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return function_exists('curl_version') && curl_version();
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}
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}
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