/** * Read response from server * * @return string */ public function read() { // First, read headers only $response = ''; $gotStatus = false; $stream = !empty($this->config['stream']); while (($line = @fgets($this->socket)) !== false) { $gotStatus = $gotStatus || strpos($line, 'HTTP') !== false; if ($gotStatus) { $response .= $line; if (rtrim($line) === '') { break; } } } $this->_checkSocketReadTimeout(); $statusCode = Microsoft_Http_Response::extractCode($response); // Handle 100 and 101 responses internally by restarting the read again if ($statusCode == 100 || $statusCode == 101) { return $this->read(); } // Check headers to see what kind of connection / transfer encoding we have $headers = Microsoft_Http_Response::extractHeaders($response); /** * Responses to HEAD requests and 204 or 304 responses are not expected * to have a body - stop reading here */ if ($statusCode == 304 || $statusCode == 204 || $this->method == Microsoft_Http_Client::HEAD) { // Close the connection if requested to do so by the server if (isset($headers['connection']) && $headers['connection'] == 'close') { $this->close(); } return $response; } // If we got a 'transfer-encoding: chunked' header if (isset($headers['transfer-encoding'])) { if (strtolower($headers['transfer-encoding']) == 'chunked') { do { $line = @fgets($this->socket); $this->_checkSocketReadTimeout(); $chunk = $line; // Figure out the next chunk size $chunksize = trim($line); if (!ctype_xdigit($chunksize)) { $this->close(); require_once 'Microsoft/Http/Client/Adapter/Exception.php'; throw new Microsoft_Http_Client_Adapter_Exception('Invalid chunk size "' . $chunksize . '" unable to read chunked body'); } // Convert the hexadecimal value to plain integer $chunksize = hexdec($chunksize); // Read next chunk $read_to = ftell($this->socket) + $chunksize; do { $current_pos = ftell($this->socket); if ($current_pos >= $read_to) { break; } if ($this->out_stream) { if (stream_copy_to_stream($this->socket, $this->out_stream, $read_to - $current_pos) == 0) { $this->_checkSocketReadTimeout(); break; } } else { $line = @fread($this->socket, $read_to - $current_pos); if ($line === false || strlen($line) === 0) { $this->_checkSocketReadTimeout(); break; } $chunk .= $line; } } while (!feof($this->socket)); $chunk .= @fgets($this->socket); $this->_checkSocketReadTimeout(); if (!$this->out_stream) { $response .= $chunk; } } while ($chunksize > 0); } else { $this->close(); throw new Microsoft_Http_Client_Adapter_Exception('Cannot handle "' . $headers['transfer-encoding'] . '" transfer encoding'); } // We automatically decode chunked-messages when writing to a stream // this means we have to disallow the Microsoft_Http_Response to do it again if ($this->out_stream) { $response = str_ireplace("Transfer-Encoding: chunked\r\n", '', $response); } // Else, if we got the content-length header, read this number of bytes } elseif (isset($headers['content-length'])) { $current_pos = ftell($this->socket); $chunk = ''; for ($read_to = $current_pos + $headers['content-length']; $read_to > $current_pos; $current_pos = ftell($this->socket)) { if ($this->out_stream) { if (@stream_copy_to_stream($this->socket, $this->out_stream, $read_to - $current_pos) == 0) { $this->_checkSocketReadTimeout(); break; } } else { $chunk = @fread($this->socket, $read_to - $current_pos); if ($chunk === false || strlen($chunk) === 0) { $this->_checkSocketReadTimeout(); break; } $response .= $chunk; } // Break if the connection ended prematurely if (feof($this->socket)) { break; } } // Fallback: just read the response until EOF } else { do { if ($this->out_stream) { if (@stream_copy_to_stream($this->socket, $this->out_stream) == 0) { $this->_checkSocketReadTimeout(); break; } } else { $buff = @fread($this->socket, 8192); if ($buff === false || strlen($buff) === 0) { $this->_checkSocketReadTimeout(); break; } else { $response .= $buff; } } } while (feof($this->socket) === false); $this->close(); } // Close the connection if requested to do so by the server if (isset($headers['connection']) && $headers['connection'] == 'close') { $this->close(); } return $response; }
/** * To extract the headers from a response string. * * @param string $rawResponseString * @return array */ public static function extractHeaders($rawResponseString) { $responseString = self::ExtractCorrectResponse($rawResponseString); return parent::extractHeaders($responseString); }