Current File : /home/tjamichg/cursos.tjamich.gob.mx/vendor/zendframework/zend-http/src/Client/Adapter/Proxy.php
<?php
/**
* @see https://github.com/zendframework/zend-http for the canonical source repository
* @copyright Copyright (c) 2005-2017 Zend Technologies USA Inc. (http://www.zend.com)
* @license https://github.com/zendframework/zend-http/blob/master/LICENSE.md New BSD License
*/
namespace Zend\Http\Client\Adapter;
use Traversable;
use Zend\Http\Client;
use Zend\Http\Client\Adapter\Exception as AdapterException;
use Zend\Http\Response;
use Zend\Stdlib\ArrayUtils;
use Zend\Stdlib\ErrorHandler;
/**
* HTTP Proxy-supporting Zend\Http\Client adapter class, based on the default
* socket based adapter.
*
* Should be used if proxy HTTP access is required. If no proxy is set, will
* fall back to Zend\Http\Client\Adapter\Socket behavior. Just like the
* default Socket adapter, this adapter does not require any special extensions
* installed.
*/
class Proxy extends Socket
{
/**
* Parameters array
*
* @var array
*/
protected $config = [
'persistent' => false,
'ssltransport' => 'ssl',
'sslcert' => null,
'sslpassphrase' => null,
'sslverifypeer' => true,
'sslcafile' => null,
'sslcapath' => null,
'sslallowselfsigned' => false,
'sslusecontext' => false,
'sslverifypeername' => true,
'proxy_host' => '',
'proxy_port' => 8080,
'proxy_user' => '',
'proxy_pass' => '',
'proxy_auth' => Client::AUTH_BASIC,
];
/**
* Whether HTTPS CONNECT was already negotiated with the proxy or not
*
* @var bool
*/
protected $negotiated = false;
/**
* Set the configuration array for the adapter
*
* @param array $options
*/
public function setOptions($options = [])
{
if ($options instanceof Traversable) {
$options = ArrayUtils::iteratorToArray($options);
}
if (! is_array($options)) {
throw new AdapterException\InvalidArgumentException(
'Array or Zend\Config object expected, got ' . gettype($options)
);
}
//enforcing that the proxy keys are set in the form proxy_*
foreach ($options as $k => $v) {
if (preg_match('/^proxy[a-z]+/', $k)) {
$options['proxy_' . substr($k, 5, strlen($k))] = $v;
unset($options[$k]);
}
}
parent::setOptions($options);
}
/**
* Connect to the remote server
*
* Will try to connect to the proxy server. If no proxy was set, will
* fall back to the target server (behave like regular Socket adapter)
*
* @param string $host
* @param int $port
* @param bool $secure
* @throws AdapterException\RuntimeException
*/
public function connect($host, $port = 80, $secure = false)
{
// If no proxy is set, fall back to Socket adapter
if (! $this->config['proxy_host']) {
parent::connect($host, $port, $secure);
return;
}
/* Url might require stream context even if proxy connection doesn't */
if ($secure) {
$this->config['sslusecontext'] = true;
$this->setSslCryptoMethod = false;
}
// Connect (a non-secure connection) to the proxy server
parent::connect(
$this->config['proxy_host'],
$this->config['proxy_port'],
false
);
}
/**
* Send request to the proxy server
*
* @param string $method
* @param \Zend\Uri\Uri $uri
* @param string $httpVer
* @param array $headers
* @param string $body
* @throws AdapterException\RuntimeException
* @return string Request as string
*/
public function write($method, $uri, $httpVer = '1.1', $headers = [], $body = '')
{
// If no proxy is set, fall back to default Socket adapter
if (! $this->config['proxy_host']) {
return parent::write($method, $uri, $httpVer, $headers, $body);
}
// Make sure we're properly connected
if (! $this->socket) {
throw new AdapterException\RuntimeException('Trying to write but we are not connected');
}
$host = $this->config['proxy_host'];
$port = $this->config['proxy_port'];
$isSecure = strtolower($uri->getScheme()) === 'https';
$connectedHost = ($isSecure ? $this->config['ssltransport'] : 'tcp') . '://' . $host;
if ($this->connectedTo[1] !== $port || $this->connectedTo[0] !== $connectedHost) {
throw new AdapterException\RuntimeException(
'Trying to write but we are connected to the wrong proxy server'
);
}
// Add Proxy-Authorization header
if ($this->config['proxy_user'] && ! isset($headers['proxy-authorization'])) {
$headers['proxy-authorization'] = Client::encodeAuthHeader(
$this->config['proxy_user'],
$this->config['proxy_pass'],
$this->config['proxy_auth']
);
}
// if we are proxying HTTPS, preform CONNECT handshake with the proxy
if ($isSecure && ! $this->negotiated) {
$this->connectHandshake($uri->getHost(), $uri->getPort(), $httpVer, $headers);
$this->negotiated = true;
}
// Save request method for later
$this->method = $method;
if ($uri->getUserInfo()) {
$headers['Authorization'] = 'Basic ' . base64_encode($uri->getUserInfo());
}
$path = $uri->getPath();
$query = $uri->getQuery();
$path .= $query ? '?' . $query : '';
if (! $this->negotiated) {
$path = $uri->getScheme() . '://' . $uri->getHost() . $path;
}
// Build request headers
$request = sprintf('%s %s HTTP/%s%s', $method, $path, $httpVer, "\r\n");
// Add all headers to the request string
foreach ($headers as $k => $v) {
if (is_string($k)) {
$v = $k . ': ' . $v;
}
$request .= $v . "\r\n";
}
if (is_resource($body)) {
$request .= "\r\n";
} else {
// Add the request body
$request .= "\r\n" . $body;
}
// Send the request
ErrorHandler::start();
$test = fwrite($this->socket, $request);
$error = ErrorHandler::stop();
if ($test === false) {
throw new AdapterException\RuntimeException('Error writing request to proxy server', 0, $error);
}
if (is_resource($body)) {
if (stream_copy_to_stream($body, $this->socket) == 0) {
throw new AdapterException\RuntimeException('Error writing request to server');
}
}
return $request;
}
/**
* Preform handshaking with HTTPS proxy using CONNECT method
*
* @param string $host
* @param int $port
* @param string $httpVer
* @param array $headers
* @throws AdapterException\RuntimeException
*/
protected function connectHandshake($host, $port = 443, $httpVer = '1.1', array &$headers = [])
{
$request = 'CONNECT ' . $host . ':' . $port . ' HTTP/' . $httpVer . "\r\n"
. 'Host: ' . $host . "\r\n";
// Add the user-agent header
if (isset($this->config['useragent'])) {
$request .= 'User-agent: ' . $this->config['useragent'] . "\r\n";
}
// If the proxy-authorization header is set, send it to proxy but remove
// it from headers sent to target host
if (isset($headers['proxy-authorization'])) {
$request .= 'Proxy-authorization: ' . $headers['proxy-authorization'] . "\r\n";
unset($headers['proxy-authorization']);
}
$request .= "\r\n";
// Send the request
ErrorHandler::start();
$test = fwrite($this->socket, $request);
$error = ErrorHandler::stop();
if (! $test) {
throw new AdapterException\RuntimeException('Error writing request to proxy server', 0, $error);
}
// Read response headers only
$response = '';
$gotStatus = false;
ErrorHandler::start();
while ($line = fgets($this->socket)) {
$gotStatus = $gotStatus || (strpos($line, 'HTTP') !== false);
if ($gotStatus) {
$response .= $line;
if (! rtrim($line)) {
break;
}
}
}
ErrorHandler::stop();
// Check that the response from the proxy is 200
if (Response::fromString($response)->getStatusCode() != 200) {
throw new AdapterException\RuntimeException(sprintf(
'Unable to connect to HTTPS proxy. Server response: %s',
$response
));
}
// If all is good, switch socket to secure mode. We have to fall back
// through the different modes
$modes = [
STREAM_CRYPTO_METHOD_TLS_CLIENT,
STREAM_CRYPTO_METHOD_SSLv3_CLIENT,
STREAM_CRYPTO_METHOD_SSLv23_CLIENT,
STREAM_CRYPTO_METHOD_SSLv2_CLIENT,
];
$success = false;
foreach ($modes as $mode) {
$success = stream_socket_enable_crypto($this->socket, true, $mode);
if ($success) {
break;
}
}
if (! $success) {
throw new AdapterException\RuntimeException(
'Unable to connect to HTTPS server through proxy: could not negotiate secure connection.'
);
}
}
/**
* Close the connection to the server
*/
public function close()
{
parent::close();
$this->negotiated = false;
}
/**
* Destructor: make sure the socket is disconnected
*/
public function __destruct()
{
if ($this->socket) {
$this->close();
}
}
}
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