class SocketPost in reCAPTCHA 6.2

Sends a POST request to the reCAPTCHA service, but makes use of fsockopen() instead of get_file_contents(). This is to account for people who may be on servers where allow_furl_open is disabled.

Hierarchy

• class \ReCaptcha\RequestMethod\SocketPost implements RequestMethod

File

recaptcha-php/src/ReCaptcha/RequestMethod/SocketPost.php, line 37

Namespace

ReCaptcha\RequestMethod

class SocketPost implements RequestMethod {

  /**
   * reCAPTCHA service host.
   * @const string
   */
  const RECAPTCHA_HOST = 'www.google.com';

  /**
   * @const string reCAPTCHA service path
   */
  const SITE_VERIFY_PATH = '/recaptcha/api/siteverify';

  /**
   * @const string Bad request error
   */
  const BAD_REQUEST = '{"success": false, "error-codes": ["invalid-request"]}';

  /**
   * @const string Bad response error
   */
  const BAD_RESPONSE = '{"success": false, "error-codes": ["invalid-response"]}';

  /**
   * Socket to the reCAPTCHA service
   * @var Socket
   */
  private $socket;

  /**
   * Constructor
   *
   * @param \ReCaptcha\RequestMethod\Socket $socket optional socket, injectable for testing
   */
  public function __construct(Socket $socket = null) {
    if (!is_null($socket)) {
      $this->socket = $socket;
    }
    else {
      $this->socket = new Socket();
    }
  }

  /**
   * Submit the POST request with the specified parameters.
   *
   * @param RequestParameters $params Request parameters
   * @return string Body of the reCAPTCHA response
   */
  public function submit(RequestParameters $params) {
    $errno = 0;
    $errstr = '';
    if (false === $this->socket
      ->fsockopen('ssl://' . self::RECAPTCHA_HOST, 443, $errno, $errstr, 30)) {
      return self::BAD_REQUEST;
    }
    $content = $params
      ->toQueryString();
    $request = "POST " . self::SITE_VERIFY_PATH . " HTTP/1.1\r\n";
    $request .= "Host: " . self::RECAPTCHA_HOST . "\r\n";
    $request .= "Content-Type: application/x-www-form-urlencoded\r\n";
    $request .= "Content-length: " . strlen($content) . "\r\n";
    $request .= "Connection: close\r\n\r\n";
    $request .= $content . "\r\n\r\n";
    $this->socket
      ->fwrite($request);
    $response = '';
    while (!$this->socket
      ->feof()) {
      $response .= $this->socket
        ->fgets(4096);
    }
    $this->socket
      ->fclose();
    if (0 !== strpos($response, 'HTTP/1.1 200 OK')) {
      return self::BAD_RESPONSE;
    }
    $parts = preg_split("#\n\\s*\n#Uis", $response);
    return $parts[1];
  }

}

Members

Name	Modifiers	Type	Description	Overrides
SocketPost::$socket	private	property	Socket to the reCAPTCHA service
SocketPost::BAD_REQUEST		constant	@const string Bad request error
SocketPost::BAD_RESPONSE		constant	@const string Bad response error
SocketPost::RECAPTCHA_HOST		constant	reCAPTCHA service host. @const string
SocketPost::SITE_VERIFY_PATH		constant	@const string reCAPTCHA service path
SocketPost::submit	public	function	Submit the POST request with the specified parameters. Overrides RequestMethod::submit
SocketPost::__construct	public	function	Constructor