/**
* Reads a part of response body encoded with chunked Transfer-Encoding
*
* @param int $bufferSize buffer size to use for reading
*
* @return string
* @throws HTTP_Request2_MessageException
*/
protected function readChunked($bufferSize)
{
// at start of the next chunk?
if (0 == $this->chunkLength) {
$line = $this->socket->readLine($bufferSize);
if ('' === $line && $this->socket->eof()) {
$this->chunkLength = -1;
// indicate missing chunk
return '';
} elseif (!preg_match('/^([0-9a-f]+)/i', $line, $matches)) {
throw new HTTP_Request2_MessageException("Cannot decode chunked response, invalid chunk length '{$line}'", HTTP_Request2_Exception::DECODE_ERROR);
} else {
$this->chunkLength = hexdec($matches[1]);
// Chunk with zero length indicates the end
if (0 == $this->chunkLength) {
$this->socket->readLine($bufferSize);
return '';
}
}
}
$data = $this->socket->read(min($this->chunkLength, $bufferSize));
$this->chunkLength -= strlen($data);
if (0 == $this->chunkLength) {
$this->socket->readLine($bufferSize);
// Trailing CRLF
}
return $data;
}
/**
* Constructor, tries to connect and authenticate to a SOCKS5 proxy
*
* @param string $address Proxy address, e.g. 'tcp://localhost:1080'
* @param int $timeout Connection timeout (seconds)
* @param array $contextOptions Stream context options
* @param string $username Proxy user name
* @param string $password Proxy password
*
* @throws HTTP_Request2_LogicException
* @throws HTTP_Request2_ConnectionException
* @throws HTTP_Request2_MessageException
*/
public function __construct($address, $timeout = 10, array $contextOptions = array(), $username = null, $password = null)
{
parent::__construct($address, $timeout, $contextOptions);
if (strlen($username)) {
$request = pack('C4', 5, 2, 0, 2);
} else {
$request = pack('C3', 5, 1, 0);
}
$this->write($request);
$response = unpack('Cversion/Cmethod', $this->read(3));
if (5 != $response['version']) {
throw new HTTP_Request2_MessageException('Invalid version received from SOCKS5 proxy: ' . $response['version'], HTTP_Request2_Exception::MALFORMED_RESPONSE);
}
switch ($response['method']) {
case 2:
$this->performAuthentication($username, $password);
case 0:
break;
default:
throw new HTTP_Request2_ConnectionException("Connection rejected by proxy due to unsupported auth method");
}
}
