mirror of
https://github.com/torrentpier/torrentpier-lts.git
synced 2025-03-01 15:21:02 +03:00
295 lines
9.1 KiB
PHP
295 lines
9.1 KiB
PHP
<?php
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/**
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* Zend Framework (http://framework.zend.com/)
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*
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* @link http://github.com/zendframework/zf2 for the canonical source repository
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* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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namespace Zend\Http\Client\Adapter;
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use Zend\Http\Client;
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use Zend\Http\Client\Adapter\Exception as AdapterException;
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use Zend\Http\Response;
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use Zend\Stdlib\ErrorHandler;
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/**
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* HTTP Proxy-supporting Zend\Http\Client adapter class, based on the default
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* socket based adapter.
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*
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* Should be used if proxy HTTP access is required. If no proxy is set, will
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* fall back to Zend\Http\Client\Adapter\Socket behavior. Just like the
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* default Socket adapter, this adapter does not require any special extensions
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* installed.
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*/
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class Proxy extends Socket
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{
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/**
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* Parameters array
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*
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* @var array
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*/
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protected $config = array(
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'ssltransport' => 'ssl',
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'sslcert' => null,
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'sslpassphrase' => null,
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'sslverifypeer' => true,
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'sslcapath' => null,
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'sslallowselfsigned' => false,
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'sslusecontext' => false,
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'proxy_host' => '',
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'proxy_port' => 8080,
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'proxy_user' => '',
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'proxy_pass' => '',
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'proxy_auth' => Client::AUTH_BASIC,
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'persistent' => false
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);
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/**
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* Whether HTTPS CONNECT was already negotiated with the proxy or not
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*
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* @var bool
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*/
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protected $negotiated = false;
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/**
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* Set the configuration array for the adapter
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*
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* @param array $options
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*/
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public function setOptions($options = array())
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{
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//enforcing that the proxy keys are set in the form proxy_*
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foreach ($options as $k => $v) {
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if (preg_match("/^proxy[a-z]+/", $k)) {
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$options['proxy_' . substr($k, 5, strlen($k))] = $v;
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unset($options[$k]);
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}
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}
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parent::setOptions($options);
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}
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/**
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* Connect to the remote server
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*
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* Will try to connect to the proxy server. If no proxy was set, will
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* fall back to the target server (behave like regular Socket adapter)
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*
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* @param string $host
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* @param int $port
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* @param bool $secure
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* @throws AdapterException\RuntimeException
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*/
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public function connect($host, $port = 80, $secure = false)
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{
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// If no proxy is set, fall back to Socket adapter
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if (! $this->config['proxy_host']) {
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parent::connect($host, $port, $secure);
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return;
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}
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/* Url might require stream context even if proxy connection doesn't */
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if ($secure) {
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$this->config['sslusecontext'] = true;
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}
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// Connect (a non-secure connection) to the proxy server
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parent::connect(
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$this->config['proxy_host'],
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$this->config['proxy_port'],
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false
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);
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}
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/**
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* Send request to the proxy server
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*
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* @param string $method
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* @param \Zend\Uri\Uri $uri
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* @param string $httpVer
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* @param array $headers
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* @param string $body
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* @throws AdapterException\RuntimeException
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* @return string Request as string
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*/
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public function write($method, $uri, $httpVer = '1.1', $headers = array(), $body = '')
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{
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// If no proxy is set, fall back to default Socket adapter
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if (! $this->config['proxy_host']) {
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return parent::write($method, $uri, $httpVer, $headers, $body);
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}
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// Make sure we're properly connected
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if (! $this->socket) {
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throw new AdapterException\RuntimeException("Trying to write but we are not connected");
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}
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$host = $this->config['proxy_host'];
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$port = $this->config['proxy_port'];
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if ($this->connectedTo[0] != "tcp://$host" || $this->connectedTo[1] != $port) {
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throw new AdapterException\RuntimeException("Trying to write but we are connected to the wrong proxy server");
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}
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// Add Proxy-Authorization header
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if ($this->config['proxy_user'] && ! isset($headers['proxy-authorization'])) {
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$headers['proxy-authorization'] = Client::encodeAuthHeader(
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$this->config['proxy_user'], $this->config['proxy_pass'], $this->config['proxy_auth']
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);
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}
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// if we are proxying HTTPS, preform CONNECT handshake with the proxy
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if ($uri->getScheme() == 'https' && (! $this->negotiated)) {
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$this->connectHandshake($uri->getHost(), $uri->getPort(), $httpVer, $headers);
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$this->negotiated = true;
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}
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// Save request method for later
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$this->method = $method;
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// Build request headers
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if ($this->negotiated) {
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$path = $uri->getPath();
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if ($uri->getQuery()) {
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$path .= '?' . $uri->getQuery();
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}
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$request = "$method $path HTTP/$httpVer\r\n";
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} else {
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$request = "$method $uri HTTP/$httpVer\r\n";
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}
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// Add all headers to the request string
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foreach ($headers as $k => $v) {
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if (is_string($k)) {
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$v = "$k: $v";
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}
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$request .= "$v\r\n";
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}
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if (is_resource($body)) {
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$request .= "\r\n";
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} else {
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// Add the request body
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$request .= "\r\n" . $body;
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}
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// Send the request
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ErrorHandler::start();
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$test = fwrite($this->socket, $request);
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$error = ErrorHandler::stop();
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if (!$test) {
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throw new AdapterException\RuntimeException("Error writing request to proxy server", 0, $error);
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}
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if (is_resource($body)) {
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if (stream_copy_to_stream($body, $this->socket) == 0) {
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throw new AdapterException\RuntimeException('Error writing request to server');
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}
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}
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return $request;
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}
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/**
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* Preform handshaking with HTTPS proxy using CONNECT method
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*
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* @param string $host
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* @param int $port
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* @param string $httpVer
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* @param array $headers
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* @throws AdapterException\RuntimeException
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*/
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protected function connectHandshake($host, $port = 443, $httpVer = '1.1', array &$headers = array())
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{
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$request = "CONNECT $host:$port HTTP/$httpVer\r\n" .
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"Host: " . $this->config['proxy_host'] . "\r\n";
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// Add the user-agent header
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if (isset($this->config['useragent'])) {
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$request .= "User-agent: " . $this->config['useragent'] . "\r\n";
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}
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// If the proxy-authorization header is set, send it to proxy but remove
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// it from headers sent to target host
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if (isset($headers['proxy-authorization'])) {
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$request .= "Proxy-authorization: " . $headers['proxy-authorization'] . "\r\n";
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unset($headers['proxy-authorization']);
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}
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$request .= "\r\n";
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// Send the request
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ErrorHandler::start();
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$test = fwrite($this->socket, $request);
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$error = ErrorHandler::stop();
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if (!$test) {
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throw new AdapterException\RuntimeException("Error writing request to proxy server", 0, $error);
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}
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// Read response headers only
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$response = '';
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$gotStatus = false;
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ErrorHandler::start();
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while ($line = fgets($this->socket)) {
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$gotStatus = $gotStatus || (strpos($line, 'HTTP') !== false);
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if ($gotStatus) {
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$response .= $line;
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if (!rtrim($line)) {
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break;
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}
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}
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}
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ErrorHandler::stop();
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// Check that the response from the proxy is 200
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if (Response::extractCode($response) != 200) {
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throw new AdapterException\RuntimeException("Unable to connect to HTTPS proxy. Server response: " . $response);
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}
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// If all is good, switch socket to secure mode. We have to fall back
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// through the different modes
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$modes = array(
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STREAM_CRYPTO_METHOD_TLS_CLIENT,
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STREAM_CRYPTO_METHOD_SSLv3_CLIENT,
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STREAM_CRYPTO_METHOD_SSLv23_CLIENT,
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STREAM_CRYPTO_METHOD_SSLv2_CLIENT
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);
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$success = false;
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foreach ($modes as $mode) {
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$success = stream_socket_enable_crypto($this->socket, true, $mode);
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if ($success) {
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break;
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}
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}
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if (! $success) {
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throw new AdapterException\RuntimeException("Unable to connect to" .
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" HTTPS server through proxy: could not negotiate secure connection.");
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}
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}
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/**
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* Close the connection to the server
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*
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*/
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public function close()
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{
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parent::close();
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$this->negotiated = false;
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}
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/**
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* Destructor: make sure the socket is disconnected
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*
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*/
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public function __destruct()
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{
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if ($this->socket) {
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$this->close();
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}
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}
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}
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