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<?php |
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/** |
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* sources. |
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* Date: 14/08/15 |
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*/ |
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namespace Mailxpert\HttpClients; |
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use Mailxpert\Exceptions\MailxpertSDKException; |
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use Mailxpert\Http\RawResponse; |
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/** |
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* Class MailxpertCurlHttpClient |
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* @package Mailxpert\HttpClients |
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*/ |
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class MailxpertCurlHttpClient implements MailxpertHttpClientInterface |
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{ |
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/** |
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* @var string The client error message |
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*/ |
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protected $curlErrorMessage = ''; |
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/** |
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* @var int The curl client error code |
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*/ |
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protected $curlErrorCode = 0; |
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/** |
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* @var string|boolean The raw response from the server |
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*/ |
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protected $rawResponse; |
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/** |
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* @var MailxpertCurl Procedural curl as object |
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*/ |
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protected $mailxpertCurl; |
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/** |
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* @const Curl Version which is unaffected by the proxy header length error. |
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*/ |
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const CURL_PROXY_QUIRK_VER = 0x071E00; |
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/** |
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* @const "Connection Established" header text |
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*/ |
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const CONNECTION_ESTABLISHED = "HTTP/1.0 200 Connection established\r\n\r\n"; |
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/** |
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* @param MailxpertCurl|null $mailxpertCurl Procedural curl as object |
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*/ |
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public function __construct(MailxpertCurl $mailxpertCurl = null) |
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{ |
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$this->mailxpertCurl = $mailxpertCurl ?: new MailxpertCurl(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function send($url, $method, $body, array $headers, $timeOut) |
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{ |
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$this->openConnection($url, $method, $body, $headers, $timeOut); |
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$this->sendRequest(); |
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if ($curlErrorCode = $this->mailxpertCurl->errno()) { |
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throw new MailxpertSDKException($this->mailxpertCurl->error(), $curlErrorCode); |
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} |
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// Separate the raw headers from the raw body |
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list($rawHeaders, $rawBody) = $this->extractResponseHeadersAndBody(); |
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$this->closeConnection(); |
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return new RawResponse($rawHeaders, $rawBody); |
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} |
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/** |
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* Opens a new curl connection. |
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* |
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* @param string $url The endpoint to send the request to. |
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* @param string $method The request method. |
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* @param string $body The body of the request. |
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* @param array $headers The request headers. |
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* @param int $timeOut The timeout in seconds for the request. |
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*/ |
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public function openConnection($url, $method, $body, array $headers, $timeOut) |
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{ |
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$options = [ |
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CURLOPT_CUSTOMREQUEST => $method, |
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CURLOPT_HTTPHEADER => $this->compileRequestHeaders($headers), |
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CURLOPT_URL => $url, |
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CURLOPT_CONNECTTIMEOUT => 10, |
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CURLOPT_TIMEOUT => $timeOut, |
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CURLOPT_RETURNTRANSFER => true, // Follow 301 redirects |
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CURLOPT_HEADER => true, // Enable header processing |
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]; |
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if ($method !== "GET") { |
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$options[CURLOPT_POSTFIELDS] = $body; |
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} |
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$this->mailxpertCurl->init(); |
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$this->mailxpertCurl->setoptArray($options); |
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} |
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/** |
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* Closes an existing curl connection |
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*/ |
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public function closeConnection() |
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{ |
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$this->mailxpertCurl->close(); |
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} |
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/** |
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* Send the request and get the raw response from curl |
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*/ |
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public function sendRequest() |
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{ |
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$this->rawResponse = $this->mailxpertCurl->exec(); |
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} |
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/** |
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* Compiles the request headers into a curl-friendly format. |
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* |
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* @param array $headers The request headers. |
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* |
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* @return array |
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*/ |
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public function compileRequestHeaders(array $headers) |
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{ |
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$return = []; |
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foreach ($headers as $key => $value) { |
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$return[] = $key.': '.$value; |
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} |
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return $return; |
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} |
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/** |
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* Extracts the headers and the body into a two-part array |
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* |
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* @return array |
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*/ |
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public function extractResponseHeadersAndBody() |
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{ |
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$headerSize = $this->getHeaderSize(); |
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$rawHeaders = mb_substr($this->rawResponse, 0, $headerSize); |
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$rawBody = mb_substr($this->rawResponse, $headerSize); |
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return [trim($rawHeaders), trim($rawBody)]; |
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} |
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/** |
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* Return proper header size |
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* |
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* @return integer |
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*/ |
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private function getHeaderSize() |
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{ |
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$headerSize = $this->mailxpertCurl->getinfo(CURLINFO_HEADER_SIZE); |
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// This corrects a Curl bug where header size does not account |
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// for additional Proxy headers. |
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if ($this->needsCurlProxyFix()) { |
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// Additional way to calculate the request body size. |
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if (preg_match('/Content-Length: (\d+)/', $this->rawResponse, $m)) { |
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$headerSize = mb_strlen($this->rawResponse) - $m[1]; |
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} elseif (stripos($this->rawResponse, self::CONNECTION_ESTABLISHED) !== false) { |
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$headerSize += mb_strlen(self::CONNECTION_ESTABLISHED); |
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} |
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} |
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return $headerSize; |
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} |
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/** |
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* Detect versions of Curl which report incorrect header lengths when |
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* using Proxies. |
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* |
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* @return boolean |
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*/ |
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private function needsCurlProxyFix() |
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{ |
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$ver = $this->mailxpertCurl->version(); |
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$version = $ver['version_number']; |
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return $version < self::CURL_PROXY_QUIRK_VER; |
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} |
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} |
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