public function proxify(\Erebot\URIInterface $proxyURI, \Erebot\URIInterface $nextURI)
{
$credentials = $proxyURI->getUserInfo();
$host = $nextURI->getHost();
$port = $nextURI->getPort();
$scheme = $nextURI->getScheme();
if ($port === null) {
$port = getservbyname($scheme, 'tcp');
}
if (!is_int($port) || $port <= 0 || $port > 65535) {
throw new \Erebot\InvalidValueException('Invalid port');
}
$request = "";
$request .= sprintf("CONNECT %s:%d HTTP/1.0\r\n", $host, $port);
$request .= sprintf("Host: %s:%d\r\n", $host, $port);
$request .= "User-Agent: Erebot/dev-master\r\n";
if ($credentials !== null) {
$request .= sprintf("Proxy-Authorization: basic %s\r\n", base64_encode($credentials));
}
$request .= "\r\n";
for ($written = 0, $len = strlen($request); $written < $len; $written += $fwrite) {
$fwrite = fwrite($this->_socket, substr($request, $written));
if ($fwrite === false) {
throw new \Erebot\Exception('Connection closed by proxy');
}
}
$line = stream_get_line($this->_socket, 4096, "\r\n");
if ($line === false) {
throw new \Erebot\InvalidValueException('Invalid response from proxy');
}
$this->_logger->debug('%(line)s', array('line' => addcslashes($line, ".. ")));
$contents = array_filter(explode(" ", $line));
switch ((int) $contents[1]) {
case 200:
break;
case 407:
throw new \Erebot\Exception('Proxy authentication required');
default:
throw new \Erebot\Exception('Connection rejected by proxy');
}
// Avoid an endless loop by limiting the number of headers.
// No HTTP server is likely to send more than 2^10 headers anyway.
$max = 1 << 10;
for ($i = 0; $i < $max; $i++) {
$line = stream_get_line($this->_socket, 4096, "\r\n");
if ($line === false) {
throw new \Erebot\InvalidValueException('Invalid response from proxy');
}
if ($line == "") {
break;
}
$this->_logger->debug('%(line)s', array('line' => addcslashes($line, ".. ")));
}
if ($i === $max) {
throw new \Erebot\InvalidValueException('Endless loop detected in proxy response');
}
}
/**
* Does the authentication step.
*
* \param Erebot::URIInterface $proxyURI
* An object representing the URI of this SOCKS proxy server,
* containing the credentials that will be sent during the
* authentication step.
*/
protected function userpass(\Erebot\URIInterface $proxyURI)
{
$username = $proxyURI->asParsedURL(PHP_URL_USER);
$password = $proxyURI->asParsedURL(PHP_URL_PASS);
if ($username === null || $password === null) {
throw new \Erebot\InvalidValueException('No username or password supplied');
}
$ulen = strlen($username);
$plen = strlen($password);
if ($ulen > 255) {
throw new \Erebot\InvalidValueException('Username too long (max. 255)');
}
if ($plen > 255) {
throw new \Erebot\InvalidValueException('Password too long (max. 255)');
}
$this->write("" . pack("Ca*Ca*", $ulen, $username, $plen, $password));
$line = $this->read(2);
if ($line[0] != "") {
throw new \Erebot\InvalidValueException('Bad subnegociation version');
}
if ($line[1] != "") {
throw new \Erebot\InvalidValueException('Bad username or password');
}
}
