2013-07-17 01:54:44 +02:00
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<?php
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2014-12-24 03:28:26 +01:00
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namespace PicoFeed\Client;
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2013-07-17 01:54:44 +02:00
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2014-12-24 03:28:26 +01:00
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use PicoFeed\Logging\Logger;
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2014-05-20 20:20:27 +02:00
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/**
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* cURL HTTP client
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*
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* @author Frederic Guillot
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2014-12-24 03:28:26 +01:00
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* @package Client
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2014-05-20 20:20:27 +02:00
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*/
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class Curl extends Client
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2013-07-17 01:54:44 +02:00
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{
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2015-02-01 20:48:05 +01:00
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/**
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* HTTP response body
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*
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* @access private
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* @var string
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*/
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private $body = '';
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/**
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* Body size
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*
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* @access private
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* @var integer
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*/
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private $body_length = 0;
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/**
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* HTTP response headers
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*
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* @access private
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* @var array
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*/
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2015-04-11 02:34:48 +02:00
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private $response_headers = array();
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2015-02-01 20:48:05 +01:00
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/**
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* Counter on the number of header received
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*
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* @access private
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* @var integer
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*/
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2015-04-11 02:34:48 +02:00
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private $response_headers_count = 0;
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2015-02-01 20:48:05 +01:00
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2014-05-20 20:20:27 +02:00
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/**
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* cURL callback to read the HTTP body
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*
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* If the function return -1, curl stop to read the HTTP response
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*
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* @access public
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* @param resource $ch cURL handler
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* @param string $buffer Chunk of data
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* @return integer Length of the buffer
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*/
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2013-07-17 01:54:44 +02:00
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public function readBody($ch, $buffer)
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{
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$length = strlen($buffer);
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$this->body_length += $length;
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2014-05-20 20:20:27 +02:00
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if ($this->body_length > $this->max_body_size) {
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return -1;
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}
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2013-07-17 01:54:44 +02:00
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$this->body .= $buffer;
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return $length;
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}
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2014-05-20 20:20:27 +02:00
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/**
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* cURL callback to read HTTP headers
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*
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* @access public
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* @param resource $ch cURL handler
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* @param string $buffer Header line
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* @return integer Length of the buffer
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*/
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2013-07-17 01:54:44 +02:00
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public function readHeaders($ch, $buffer)
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{
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$length = strlen($buffer);
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2015-04-28 18:08:42 +02:00
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if ($buffer === "\r\n" || $buffer === "\n") {
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2015-04-11 02:34:48 +02:00
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$this->response_headers_count++;
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2013-07-17 01:54:44 +02:00
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}
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else {
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2015-04-11 02:34:48 +02:00
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if (! isset($this->response_headers[$this->response_headers_count])) {
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$this->response_headers[$this->response_headers_count] = '';
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2013-07-17 01:54:44 +02:00
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}
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2015-04-11 02:34:48 +02:00
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$this->response_headers[$this->response_headers_count] .= $buffer;
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2013-07-17 01:54:44 +02:00
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}
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return $length;
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}
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2015-02-06 03:16:34 +01:00
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/**
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* cURL callback to passthrough the HTTP status header to the client
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*
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* @access public
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* @param resource $ch cURL handler
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* @param string $buffer Header line
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* @return integer Length of the buffer
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*/
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public function passthroughHeaders($ch, $buffer)
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{
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list($status, $headers) = HttpHeaders::parse(array($buffer));
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if ($status !== 0) {
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header(':', true, $status);
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}
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elseif (isset($headers['Content-Type'])) {
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header($buffer);
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}
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return $this->readHeaders($ch, $buffer);
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}
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/**
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* cURL callback to passthrough the HTTP body to the client
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*
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* If the function return -1, curl stop to read the HTTP response
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*
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* @access public
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* @param resource $ch cURL handler
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* @param string $buffer Chunk of data
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* @return integer Length of the buffer
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*/
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public function passthroughBody($ch, $buffer)
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{
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echo $buffer;
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return strlen($buffer);
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}
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2014-05-20 20:20:27 +02:00
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/**
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2014-10-19 20:42:31 +02:00
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* Prepare HTTP headers
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2014-05-20 20:20:27 +02:00
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*
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2014-10-19 20:42:31 +02:00
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* @access private
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2014-12-24 03:28:26 +01:00
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* @return string[]
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2014-05-20 20:20:27 +02:00
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*/
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2014-10-19 20:42:31 +02:00
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private function prepareHeaders()
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2013-07-17 01:54:44 +02:00
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{
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2014-10-19 20:42:31 +02:00
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$headers = array(
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'Connection: close',
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);
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2013-07-17 01:54:44 +02:00
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2014-10-19 20:42:31 +02:00
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if ($this->etag) {
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$headers[] = 'If-None-Match: '.$this->etag;
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}
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2013-07-17 01:54:44 +02:00
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2014-10-19 20:42:31 +02:00
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if ($this->last_modified) {
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$headers[] = 'If-Modified-Since: '.$this->last_modified;
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}
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2013-07-17 01:54:44 +02:00
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2015-04-11 02:34:48 +02:00
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$headers = array_merge($headers, $this->request_headers);
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2014-10-19 20:42:31 +02:00
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return $headers;
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}
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2013-09-24 01:22:13 +02:00
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2014-10-19 20:42:31 +02:00
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/**
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* Prepare curl proxy context
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*
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* @access private
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2015-04-28 18:08:42 +02:00
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* @param resource $ch
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2014-12-24 03:28:26 +01:00
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* @return resource $ch
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2014-10-19 20:42:31 +02:00
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*/
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private function prepareProxyContext($ch)
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{
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2014-05-20 20:20:27 +02:00
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if ($this->proxy_hostname) {
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2013-09-24 01:22:13 +02:00
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2014-12-24 03:28:26 +01:00
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Logger::setMessage(get_called_class().' Proxy: '.$this->proxy_hostname.':'.$this->proxy_port);
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2014-05-20 20:20:27 +02:00
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curl_setopt($ch, CURLOPT_PROXYPORT, $this->proxy_port);
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2013-09-24 01:22:13 +02:00
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curl_setopt($ch, CURLOPT_PROXYTYPE, 'HTTP');
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2014-05-20 20:20:27 +02:00
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curl_setopt($ch, CURLOPT_PROXY, $this->proxy_hostname);
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2013-09-24 01:22:13 +02:00
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2014-05-20 20:20:27 +02:00
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if ($this->proxy_username) {
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2014-12-24 03:28:26 +01:00
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Logger::setMessage(get_called_class().' Proxy credentials: Yes');
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2014-05-20 20:20:27 +02:00
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curl_setopt($ch, CURLOPT_PROXYUSERPWD, $this->proxy_username.':'.$this->proxy_password);
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}
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else {
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2014-12-24 03:28:26 +01:00
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Logger::setMessage(get_called_class().' Proxy credentials: No');
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2013-09-24 01:22:13 +02:00
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}
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}
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2014-10-19 20:42:31 +02:00
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return $ch;
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}
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2014-12-24 19:50:20 +01:00
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/**
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* Prepare curl auth context
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*
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* @access private
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2015-04-28 18:08:42 +02:00
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* @param resource $ch
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2014-12-24 19:50:20 +01:00
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* @return resource $ch
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*/
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private function prepareAuthContext($ch)
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{
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if ($this->username && $this->password) {
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curl_setopt($ch, CURLOPT_USERPWD, $this->username.':'.$this->password);
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}
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return $ch;
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}
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2015-02-06 03:16:34 +01:00
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/**
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* Set write/header functions
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*
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* @access private
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2015-04-28 18:08:42 +02:00
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* @param resource $ch
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2015-02-06 03:16:34 +01:00
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* @return resource $ch
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*/
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private function prepareDownloadMode($ch)
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{
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$write_function = 'readBody';
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$header_function = 'readHeaders';
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if ($this->isPassthroughEnabled()) {
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$write_function = 'passthroughBody';
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$header_function = 'passthroughHeaders';
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}
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curl_setopt($ch, CURLOPT_WRITEFUNCTION, array($this, $write_function));
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curl_setopt($ch, CURLOPT_HEADERFUNCTION, array($this, $header_function));
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return $ch;
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}
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2014-10-19 20:42:31 +02:00
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/**
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* Prepare curl context
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*
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* @access private
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* @return resource
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*/
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private function prepareContext()
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{
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $this->url);
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curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
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2015-04-11 15:40:09 +02:00
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curl_setopt($ch, CURLOPT_TIMEOUT, $this->timeout);
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2014-10-19 20:42:31 +02:00
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->timeout);
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2015-03-01 19:56:11 +01:00
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curl_setopt($ch, CURLOPT_USERAGENT, $this->user_agent);
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2014-10-19 20:42:31 +02:00
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curl_setopt($ch, CURLOPT_HTTPHEADER, $this->prepareHeaders());
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2015-08-02 20:08:21 +02:00
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
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2014-10-19 20:42:31 +02:00
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curl_setopt($ch, CURLOPT_ENCODING, '');
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curl_setopt($ch, CURLOPT_COOKIEJAR, 'php://memory');
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curl_setopt($ch, CURLOPT_COOKIEFILE, 'php://memory');
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2015-03-01 19:56:11 +01:00
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// Disable SSLv3 by enforcing TLSv1.x for curl >= 7.34.0 and < 7.39.0.
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// Versions prior to 7.34 and at least when compiled against openssl
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// interpret this parameter as "limit to TLSv1.0" which fails for sites
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// which enforce TLS 1.1+.
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// Starting with curl 7.39.0 SSLv3 is disabled by default.
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$version = curl_version();
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if ($version['version_number'] >= 467456 && $version['version_number'] < 468736) {
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curl_setopt($ch, CURLOPT_SSLVERSION, 1);
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}
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2014-10-19 20:42:31 +02:00
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2015-02-06 03:16:34 +01:00
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$ch = $this->prepareDownloadMode($ch);
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2014-10-19 20:42:31 +02:00
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$ch = $this->prepareProxyContext($ch);
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2014-12-24 19:50:20 +01:00
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$ch = $this->prepareAuthContext($ch);
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2014-10-19 20:42:31 +02:00
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return $ch;
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}
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/**
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* Execute curl context
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*
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* @access private
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*/
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private function executeContext()
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{
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$ch = $this->prepareContext();
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2013-07-17 01:54:44 +02:00
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curl_exec($ch);
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2014-12-24 03:28:26 +01:00
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Logger::setMessage(get_called_class().' cURL total time: '.curl_getinfo($ch, CURLINFO_TOTAL_TIME));
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Logger::setMessage(get_called_class().' cURL dns lookup time: '.curl_getinfo($ch, CURLINFO_NAMELOOKUP_TIME));
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Logger::setMessage(get_called_class().' cURL connect time: '.curl_getinfo($ch, CURLINFO_CONNECT_TIME));
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Logger::setMessage(get_called_class().' cURL speed download: '.curl_getinfo($ch, CURLINFO_SPEED_DOWNLOAD));
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Logger::setMessage(get_called_class().' cURL effective url: '.curl_getinfo($ch, CURLINFO_EFFECTIVE_URL));
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2013-07-17 01:54:44 +02:00
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2014-12-24 03:28:26 +01:00
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$curl_errno = curl_errno($ch);
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if ($curl_errno) {
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Logger::setMessage(get_called_class().' cURL error: '.curl_error($ch));
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2013-07-17 01:54:44 +02:00
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curl_close($ch);
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2014-12-24 03:28:26 +01:00
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$this->handleError($curl_errno);
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2013-07-17 01:54:44 +02:00
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}
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2014-12-24 03:28:26 +01:00
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// Update the url if there where redirects
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$this->url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
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2013-07-17 01:54:44 +02:00
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2014-12-24 03:28:26 +01:00
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curl_close($ch);
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2014-10-19 20:42:31 +02:00
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}
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2013-08-15 03:18:23 +02:00
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2014-10-19 20:42:31 +02:00
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/**
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* Do the HTTP request
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*
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* @access public
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* @param bool $follow_location Flag used when there is an open_basedir restriction
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* @return array HTTP response ['body' => ..., 'status' => ..., 'headers' => ...]
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*/
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public function doRequest($follow_location = true)
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{
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2014-12-24 03:28:26 +01:00
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$this->executeContext();
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2013-08-15 03:18:23 +02:00
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2015-04-28 18:08:42 +02:00
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list($status, $headers) = HttpHeaders::parse(explode("\n", $this->response_headers[$this->response_headers_count - 1]));
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2013-08-15 03:18:23 +02:00
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2015-08-02 20:08:21 +02:00
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if ($follow_location && ($status == 301 || $status == 302)) {
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2014-10-19 20:42:31 +02:00
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return $this->handleRedirection($headers['Location']);
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2013-08-15 03:18:23 +02:00
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}
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2013-07-17 01:54:44 +02:00
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return array(
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'status' => $status,
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'body' => $this->body,
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'headers' => $headers
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);
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}
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2014-10-19 20:42:31 +02:00
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2015-02-01 20:48:05 +01:00
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/**
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* Handle manually redirections when there is an open base dir restriction
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*
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* @access private
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* @param string $location Redirected URL
|
|
|
|
* @return array
|
|
|
|
*/
|
|
|
|
private function handleRedirection($location)
|
|
|
|
{
|
|
|
|
$nb_redirects = 0;
|
|
|
|
$result = array();
|
|
|
|
$this->url = Url::resolve($location, $this->url);
|
|
|
|
$this->body = '';
|
|
|
|
$this->body_length = 0;
|
2015-04-11 02:34:48 +02:00
|
|
|
$this->response_headers = array();
|
|
|
|
$this->response_headers_count = 0;
|
2015-02-01 20:48:05 +01:00
|
|
|
|
|
|
|
while (true) {
|
|
|
|
|
|
|
|
$nb_redirects++;
|
|
|
|
|
|
|
|
if ($nb_redirects >= $this->max_redirects) {
|
|
|
|
throw new MaxRedirectException('Maximum number of redirections reached');
|
|
|
|
}
|
|
|
|
|
|
|
|
$result = $this->doRequest(false);
|
|
|
|
|
|
|
|
if ($result['status'] == 301 || $result['status'] == 302) {
|
|
|
|
$this->url = Url::resolve($result['headers']['Location'], $this->url);
|
|
|
|
$this->body = '';
|
|
|
|
$this->body_length = 0;
|
2015-04-11 02:34:48 +02:00
|
|
|
$this->response_headers = array();
|
|
|
|
$this->response_headers_count = 0;
|
2015-02-01 20:48:05 +01:00
|
|
|
}
|
|
|
|
else {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return $result;
|
|
|
|
}
|
|
|
|
|
2014-12-24 03:28:26 +01:00
|
|
|
/**
|
|
|
|
* Handle cURL errors (throw individual exceptions)
|
|
|
|
*
|
|
|
|
* We don't use constants because they are not necessary always available
|
|
|
|
* (depends of the version of libcurl linked to php)
|
|
|
|
*
|
|
|
|
* @see http://curl.haxx.se/libcurl/c/libcurl-errors.html
|
|
|
|
* @access private
|
|
|
|
* @param integer $errno cURL error code
|
|
|
|
*/
|
|
|
|
private function handleError($errno)
|
|
|
|
{
|
|
|
|
switch ($errno) {
|
|
|
|
case 78: // CURLE_REMOTE_FILE_NOT_FOUND
|
|
|
|
throw new InvalidUrlException('Resource not found');
|
|
|
|
case 6: // CURLE_COULDNT_RESOLVE_HOST
|
|
|
|
throw new InvalidUrlException('Unable to resolve hostname');
|
|
|
|
case 7: // CURLE_COULDNT_CONNECT
|
|
|
|
throw new InvalidUrlException('Unable to connect to the remote host');
|
2015-01-02 21:25:11 +01:00
|
|
|
case 23: // CURLE_WRITE_ERROR
|
|
|
|
throw new MaxSizeException('Maximum response size exceeded');
|
2014-12-24 03:28:26 +01:00
|
|
|
case 28: // CURLE_OPERATION_TIMEDOUT
|
|
|
|
throw new TimeoutException('Operation timeout');
|
|
|
|
case 35: // CURLE_SSL_CONNECT_ERROR
|
|
|
|
case 51: // CURLE_PEER_FAILED_VERIFICATION
|
|
|
|
case 58: // CURLE_SSL_CERTPROBLEM
|
|
|
|
case 60: // CURLE_SSL_CACERT
|
|
|
|
case 59: // CURLE_SSL_CIPHER
|
|
|
|
case 64: // CURLE_USE_SSL_FAILED
|
|
|
|
case 66: // CURLE_SSL_ENGINE_INITFAILED
|
|
|
|
case 77: // CURLE_SSL_CACERT_BADFILE
|
|
|
|
case 83: // CURLE_SSL_ISSUER_ERROR
|
|
|
|
throw new InvalidCertificateException('Invalid SSL certificate');
|
|
|
|
case 47: // CURLE_TOO_MANY_REDIRECTS
|
|
|
|
throw new MaxRedirectException('Maximum number of redirections reached');
|
|
|
|
case 63: // CURLE_FILESIZE_EXCEEDED
|
|
|
|
throw new MaxSizeException('Maximum response size exceeded');
|
|
|
|
default:
|
|
|
|
throw new InvalidUrlException('Unable to fetch the URL');
|
|
|
|
}
|
2014-10-19 20:42:31 +02:00
|
|
|
}
|
2014-05-20 20:20:27 +02:00
|
|
|
}
|