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<?php
// namespace administrator\components\com_jmap\framework\http\transport;
/**
* @package JMAP::FRAMEWORK::components::com_jmap
* @subpackage framework
* @subpackage http
* @subpackage transport
* @author Joomla! Extensions Store
* @copyright (C) 2015 - Joomla! Extensions Store
* @license GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html
*/
defined ( '_JEXEC' ) or die ( 'Restricted access' );
/**
* HTTP transport class for using curl adapter
*
* @package JMAP::FRAMEWORK::components::com_jmap
* @subpackage framework
* @subpackage http
* @subpackage transport
* @since 3.0
*/
class JMapHttpTransportCurl implements JMapHttpTransport {
/**
*
* @var JRegistry The client options.
* @since 11.3
*/
protected $options;
/**
* Method to get a response object from a server response.
*
* @param string $content
* The complete server response, including headers
* as a string if the response has no errors.
* @param array $info
* The cURL request information.
*
* @return JHttpResponse
*
* @since 11.3
* @throws UnexpectedValueException
*/
protected function getResponse($content, $info) {
// Create the response object.
$return = new JHttpResponse ();
// Get the number of redirects that occurred.
$redirects = isset ( $info ['redirect_count'] ) ? $info ['redirect_count'] : 0;
/*
* Split the response into headers and body. If cURL encountered redirects, the headers for the redirected requests will also be included. So we split the response into header + body + the number of redirects and only use the last two sections which should be the last set of headers and the actual body.
*/
$response = explode ( "\r\n\r\n", $content, 2 + $redirects );
// Set the body for the response.
$return->body = array_pop ( $response );
// Get the last set of response headers as an array.
$headers = explode ( "\r\n", array_pop ( $response ) );
// Get the response code from the first offset of the response headers.
preg_match ( '/[0-9]{3}/', array_shift ( $headers ), $matches );
$code = count ( $matches ) ? $matches [0] : null;
if (is_numeric ( $code )) {
$return->code = ( int ) $code;
}
// No valid response code was detected.
else {
throw new UnexpectedValueException ( 'No HTTP response code found.' );
}
// Add the response headers to the response object.
foreach ( $headers as $header ) {
$pos = strpos ( $header, ':' );
$return->headers [trim ( substr ( $header, 0, $pos ) )] = trim ( substr ( $header, ($pos + 1) ) );
}
return $return;
}
/**
* Method to check if HTTP transport cURL is available for use
*
* @return boolean true if available, else false
*
* @since 12.1
*/
public static function isSupported() {
return function_exists ( 'curl_version' ) && curl_version ();
}
/**
* Send a request to the server and return a JHttpResponse object with the response.
*
* @param string $method
* The HTTP method for sending the request.
* @param JUri $uri
* The URI to the resource to request.
* @param mixed $data
* Either an associative array or a string to be sent with the request.
* @param array $headers
* An array of request headers to send with the request.
* @param integer $timeout
* Read timeout in seconds.
* @param string $userAgent
* The optional user agent string to send with the request.
*
* @return JHttpResponse
*
* @since 11.3
* @throws RuntimeException
*/
public function request($method, JUri $uri, $data = null, array $headers = null, $timeout = null, $userAgent = null) {
// Setup the cURL handle.
$ch = curl_init ();
// Set the request method.
$options [CURLOPT_CUSTOMREQUEST] = strtoupper ( $method );
// Don't wait for body when $method is HEAD
$options [CURLOPT_NOBODY] = ($method === 'HEAD');
// If data exists let's encode it and make sure our Content-type header is set.
if (isset ( $data )) {
// If the data is a scalar value simply add it to the cURL post fields.
if (is_scalar ( $data ) || (isset ( $headers ['Content-Type'] ) && strpos ( $headers ['Content-Type'], 'multipart/form-data' ) === 0)) {
$options [CURLOPT_POSTFIELDS] = $data;
}
// Otherwise we need to encode the value first.
else {
$options [CURLOPT_POSTFIELDS] = http_build_query ( $data );
}
if (! isset ( $headers ['Content-Type'] )) {
$headers ['Content-Type'] = 'application/x-www-form-urlencoded; charset=utf-8';
}
// Add the relevant headers.
if (is_scalar ( $options [CURLOPT_POSTFIELDS] )) {
$headers ['Content-Length'] = strlen ( $options [CURLOPT_POSTFIELDS] );
}
}
// Build the headers string for the request.
$headerArray = array ();
if (isset ( $headers )) {
foreach ( $headers as $key => $value ) {
$headerArray [] = $key . ': ' . $value;
}
// Add the headers string into the stream context options array.
$options [CURLOPT_HTTPHEADER] = $headerArray;
}
// If an explicit timeout is given user it.
if (isset ( $timeout )) {
$options [CURLOPT_TIMEOUT] = ( int ) $timeout;
$options [CURLOPT_CONNECTTIMEOUT] = ( int ) $timeout;
}
// If an explicit user agent is given use it.
if (isset ( $userAgent )) {
$options [CURLOPT_USERAGENT] = $userAgent;
}
// Set the request URL.
$options [CURLOPT_URL] = ( string ) $uri;
// We want our headers. :-)
$options [CURLOPT_HEADER] = true;
// Return it... echoing it would be tacky.
$options [CURLOPT_RETURNTRANSFER] = true;
// Override the Expect header to prevent cURL from confusing itself in its own stupidity.
// Link: http://the-stickman.com/web-development/php-and-curl-disabling-100-continue-header/
$options [CURLOPT_HTTPHEADER] [] = 'Expect:';
// Follow redirects.
$options [CURLOPT_FOLLOWLOCATION] = true;
// Set the cURL options.
curl_setopt_array ( $ch, $options );
// Execute the request and close the connection.
$content = curl_exec ( $ch );
// Check if the content is a string. If it is not, it must be an error.
if (! is_string ( $content )) {
$message = curl_error ( $ch );
if (empty ( $message )) {
// Error but nothing from cURL? Create our own
$message = 'No HTTP response received';
}
throw new RuntimeException ( $message );
}
// Get the request information.
$info = curl_getinfo ( $ch );
// Close the connection.
curl_close ( $ch );
return $this->getResponse ( $content, $info );
}
/**
* Constructor.
* CURLOPT_FOLLOWLOCATION must be disabled when open_basedir or safe_mode are enabled.
*
* @param JRegistry $options
* Client options object.
*
* @see http://www.php.net/manual/en/function.curl-setopt.php
* @since 11.3
* @throws RuntimeException
*/
public function __construct() {
if (! function_exists ( 'curl_init' ) || ! is_callable ( 'curl_init' )) {
throw new RuntimeException ( 'Cannot use a cURL transport when curl_init() is not available.' );
}
}
}
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