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<?php
/**
* Part of the Joomla Framework Http Package
*
* @copyright Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Http\Transport;
use Composer\CaBundle\CaBundle;
use Joomla\Http\AbstractTransport;
use Joomla\Http\Exception\InvalidResponseCodeException;
use Joomla\Http\Response;
use Joomla\Uri\Uri;
use Joomla\Uri\UriInterface;
use Laminas\Diactoros\Stream as StreamResponse;
/**
* HTTP transport class for using PHP streams.
*
* @since 1.0
*/
class Stream extends AbstractTransport
{
/**
* Send a request to the server and return a Response object with the response.
*
* @param string $method The HTTP method for sending the request.
* @param UriInterface $uri The URI to the resource to request.
* @param mixed $data Either an associative array or a string to be sent with the request.
* @param array $headers An array of request headers to send with the request.
* @param integer $timeout Read timeout in seconds.
* @param string $userAgent The optional user agent string to send with the request.
*
* @return Response
*
* @since 1.0
* @throws \RuntimeException
*/
public function request($method, UriInterface $uri, $data = null, array $headers = [], $timeout = null, $userAgent = null)
{
// Create the stream context options array with the required method offset.
$options = ['method' => strtoupper($method)];
// If data exists let's encode it and make sure our Content-Type header is set.
if (isset($data))
{
// If the data is a scalar value simply add it to the stream context options.
if (is_scalar($data))
{
$options['content'] = $data;
}
else
{
// Otherwise we need to encode the value first.
$options['content'] = http_build_query($data);
}
if (!isset($headers['Content-Type']))
{
$headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=utf-8';
}
// Add the relevant headers.
$headers['Content-Length'] = \strlen($options['content']);
}
// If an explicit timeout is given user it.
if (isset($timeout))
{
$options['timeout'] = (int) $timeout;
}
// If an explicit user agent is given use it.
if (isset($userAgent))
{
$options['user_agent'] = $userAgent;
}
// Ignore HTTP errors so that we can capture them.
$options['ignore_errors'] = 1;
// Follow redirects.
$options['follow_location'] = (int) $this->getOption('follow_location', 1);
// Configure protocol version, use transport's default if not set otherwise.
$options['follow_location'] = $this->getOption('protocolVersion', '1.0');
// Add the proxy configuration if enabled
if ($this->getOption('proxy.enabled', false))
{
$options['request_fulluri'] = true;
if ($this->getOption('proxy.host') && $this->getOption('proxy.port'))
{
$options['proxy'] = $this->getOption('proxy.host') . ':' . (int) $this->getOption('proxy.port');
}
// If authentication details are provided, add those as well
if ($this->getOption('proxy.user') && $this->getOption('proxy.password'))
{
$headers['Proxy-Authorization'] = 'Basic ' . base64_encode($this->getOption('proxy.user') . ':' . $this->getOption('proxy.password'));
}
}
// Build the headers string for the request.
if (!empty($headers))
{
$headerString = '';
foreach ($headers as $key => $value)
{
if (\is_array($value))
{
foreach ($value as $header)
{
$headerString .= "$key: $header\r\n";
}
}
else
{
$headerString .= "$key: $value\r\n";
}
}
// Add the headers string into the stream context options array.
$options['header'] = trim($headerString, "\r\n");
}
// Authentication, if needed
if ($uri instanceof Uri && $this->getOption('userauth') && $this->getOption('passwordauth'))
{
$uri->setUser($this->getOption('userauth'));
$uri->setPass($this->getOption('passwordauth'));
}
// Set any custom transport options
foreach ($this->getOption('transport.stream', []) as $key => $value)
{
$options[$key] = $value;
}
// Get the current context options.
$contextOptions = stream_context_get_options(stream_context_get_default());
// Add our options to the currently defined options, if any.
$contextOptions['http'] = isset($contextOptions['http']) ? array_merge($contextOptions['http'], $options) : $options;
// Create the stream context for the request.
$streamOptions = [
'http' => $options,
'ssl' => [
'verify_peer' => true,
'verify_depth' => 5,
'verify_peer_name' => true,
],
];
// The cacert may be a file or path
$certpath = $this->getOption('stream.certpath', CaBundle::getSystemCaRootBundlePath());
if (is_dir($certpath))
{
$streamOptions['ssl']['capath'] = $certpath;
}
else
{
$streamOptions['ssl']['cafile'] = $certpath;
}
$context = stream_context_create($streamOptions);
// Capture PHP errors
$php_errormsg = '';
$trackErrors = ini_get('track_errors');
ini_set('track_errors', true);
// Open the stream for reading.
$stream = @fopen((string) $uri, 'r', false, $context);
if (!$stream)
{
if (!$php_errormsg)
{
// Error but nothing from php? Create our own
$php_errormsg = sprintf('Could not connect to resource: %s', $uri);
}
// Restore error tracking to give control to the exception handler
ini_set('track_errors', $trackErrors);
throw new \RuntimeException($php_errormsg);
}
// Restore error tracking to what it was before.
ini_set('track_errors', $trackErrors);
// Get the metadata for the stream, including response headers.
$metadata = stream_get_meta_data($stream);
// Get the contents from the stream.
$content = stream_get_contents($stream);
// Close the stream.
fclose($stream);
$headers = [];
if (isset($metadata['wrapper_data']['headers']))
{
$headers = $metadata['wrapper_data']['headers'];
}
elseif (isset($metadata['wrapper_data']))
{
$headers = $metadata['wrapper_data'];
}
return $this->getResponse($headers, $content);
}
/**
* Method to get a response object from a server response.
*
* @param array $headers The response headers as an array.
* @param string $body The response body as a string.
*
* @return Response
*
* @since 1.0
* @throws InvalidResponseCodeException
*/
protected function getResponse(array $headers, $body)
{
// Get the response code from the first offset of the response headers.
preg_match('/[0-9]{3}/', array_shift($headers), $matches);
$code = $matches[0];
if (!is_numeric($code))
{
// No valid response code was detected.
throw new InvalidResponseCodeException('No HTTP response code found.');
}
$statusCode = (int) $code;
$verifiedHeaders = $this->processHeaders($headers);
$streamInterface = new StreamResponse('php://memory', 'rw');
$streamInterface->write($body);
return new Response($streamInterface, $statusCode, $verifiedHeaders);
}
/**
* Method to check if http transport stream available for use
*
* @return boolean True if available else false
*
* @since 1.0
*/
public static function isSupported()
{
return \function_exists('fopen') && \is_callable('fopen') && ini_get('allow_url_fopen');
}
}