/wp-content/plugins/iwp-client/lib/amazon/guzzle/guzzle/src/Guzzle/Stream/PhpStreamRequestFactory.php

<?php



namespace Guzzle\Stream;



use Guzzle\Common\Exception\InvalidArgumentException;

use Guzzle\Common\Exception\RuntimeException;

use Guzzle\Http\Message\EntityEnclosingRequestInterface;

use Guzzle\Http\Message\RequestInterface;

use Guzzle\Http\Url;



/**

 * Factory used to create fopen streams using PHP's http and https stream wrappers

 *

 * Note: PHP's http stream wrapper only supports streaming downloads. It does not support streaming uploads.

 */

class PhpStreamRequestFactory implements StreamRequestFactoryInterface

{

    /** @var resource Stream context options */

    protected $context;



    /** @var array Stream context */

    protected $contextOptions;



    /** @var Url Stream URL */

    protected $url;



    /** @var array Last response headers received by the HTTP request */

    protected $lastResponseHeaders;



    /**

     * {@inheritdoc}

     *

     * The $params array can contain the following custom keys specific to the PhpStreamRequestFactory:

     * - stream_class: The name of a class to create instead of a Guzzle\Stream\Stream object

     */

    public function fromRequest(RequestInterface $request, $context = array(), array $params = array())

    {

        if (is_resource($context)) {

            $this->contextOptions = stream_context_get_options($context);

            $this->context = $context;

        } elseif (is_array($context) || !$context) {

            $this->contextOptions = $context;

            $this->createContext($params);

        } elseif ($context) {

            throw new InvalidArgumentException('$context must be an array or resource');

        }



        // Dispatch the before send event

        $request->dispatch('request.before_send', array(

            'request'         => $request,

            'context'         => $this->context,

            'context_options' => $this->contextOptions

        ));



        $this->setUrl($request);

        $this->addDefaultContextOptions($request);

        $this->addSslOptions($request);

        $this->addBodyOptions($request);

        $this->addProxyOptions($request);



        // Create the file handle but silence errors

        return $this->createStream($params)

            ->setCustomData('request', $request)

            ->setCustomData('response_headers', $this->getLastResponseHeaders());

    }



    /**

     * Set an option on the context and the internal options array

     *

     * @param string $wrapper   Stream wrapper name of http

     * @param string $name      Context name

     * @param mixed  $value     Context value

     * @param bool   $overwrite Set to true to overwrite an existing value

     */

    protected function setContextValue($wrapper, $name, $value, $overwrite = false)

    {

        if (!isset($this->contextOptions[$wrapper])) {

            $this->contextOptions[$wrapper] = array($name => $value);

        } elseif (!$overwrite && isset($this->contextOptions[$wrapper][$name])) {

            return;

        }

        $this->contextOptions[$wrapper][$name] = $value;

        stream_context_set_option($this->context, $wrapper, $name, $value);

    }



    /**

     * Create a stream context

     *

     * @param array $params Parameter array

     */

    protected function createContext(array $params)

    {

        $options = $this->contextOptions;

        $this->context = $this->createResource(function () use ($params, $options) {

            return stream_context_create($options, $params);

        });

    }



    /**

     * Get the last response headers received by the HTTP request

     *

     * @return array

     */

    public function getLastResponseHeaders()

    {

        return $this->lastResponseHeaders;

    }



    /**

     * Adds the default context options to the stream context options

     *

     * @param RequestInterface $request Request

     */

    protected function addDefaultContextOptions(RequestInterface $request)

    {

        $this->setContextValue('http', 'method', $request->getMethod());

        $headers = $request->getHeaderLines();



        // "Connection: close" is required to get streams to work in HTTP 1.1

        if (!$request->hasHeader('Connection')) {

            $headers[] = 'Connection: close';

        }



        $this->setContextValue('http', 'header', $headers);

        $this->setContextValue('http', 'protocol_version', $request->getProtocolVersion());

        $this->setContextValue('http', 'ignore_errors', true);

    }



    /**

     * Set the URL to use with the factory

     *

     * @param RequestInterface $request Request that owns the URL

     */

    protected function setUrl(RequestInterface $request)

    {

        $this->url = $request->getUrl(true);



        // Check for basic Auth username

        if ($request->getUsername()) {

            $this->url->setUsername($request->getUsername());

        }



        // Check for basic Auth password

        if ($request->getPassword()) {

            $this->url->setPassword($request->getPassword());

        }

    }



    /**

     * Add SSL options to the stream context

     *

     * @param RequestInterface $request Request

     */

    protected function addSslOptions(RequestInterface $request)

    {

        if ($request->getCurlOptions()->get(CURLOPT_SSL_VERIFYPEER)) {

            $this->setContextValue('ssl', 'verify_peer', true, true);

            if ($cafile = $request->getCurlOptions()->get(CURLOPT_CAINFO)) {

                $this->setContextValue('ssl', 'cafile', $cafile, true);

            }

        } else {

            $this->setContextValue('ssl', 'verify_peer', false, true);

        }

    }



    /**

     * Add body (content) specific options to the context options

     *

     * @param RequestInterface $request

     */

    protected function addBodyOptions(RequestInterface $request)

    {

        // Add the content for the request if needed

        if (!($request instanceof EntityEnclosingRequestInterface)) {

            return;

        }



        if (count($request->getPostFields())) {

            $this->setContextValue('http', 'content', (string) $request->getPostFields(), true);

        } elseif ($request->getBody()) {

            $this->setContextValue('http', 'content', (string) $request->getBody(), true);

        }



        // Always ensure a content-length header is sent

        if (isset($this->contextOptions['http']['content'])) {

            $headers = isset($this->contextOptions['http']['header']) ? $this->contextOptions['http']['header'] : array();

            $headers[] = 'Content-Length: ' . strlen($this->contextOptions['http']['content']);

            $this->setContextValue('http', 'header', $headers, true);

        }

    }



    /**

     * Add proxy parameters to the context if needed

     *

     * @param RequestInterface $request Request

     */

    protected function addProxyOptions(RequestInterface $request)

    {

        if ($proxy = $request->getCurlOptions()->get(CURLOPT_PROXY)) {

            $this->setContextValue('http', 'proxy', $proxy);

        }

    }



    /**

     * Create the stream for the request with the context options

     *

     * @param array $params Parameters of the stream

     *

     * @return StreamInterface

     */

    protected function createStream(array $params)

    {

        $http_response_header = null;

        $url = $this->url;

        $context = $this->context;

        $fp = $this->createResource(function () use ($context, $url, &$http_response_header) {

            return fopen((string) $url, 'r', false, $context);

        });



        // Determine the class to instantiate

        $className = isset($params['stream_class']) ? $params['stream_class'] : __NAMESPACE__ . '\\Stream';



        /** @var $stream StreamInterface */

        $stream = new $className($fp);



        // Track the response headers of the request

        if (isset($http_response_header)) {

            $this->lastResponseHeaders = $http_response_header;

            $this->processResponseHeaders($stream);

        }



        return $stream;

    }



    /**

     * Process response headers

     *

     * @param StreamInterface $stream

     */

    protected function processResponseHeaders(StreamInterface $stream)

    {

        // Set the size on the stream if it was returned in the response

        foreach ($this->lastResponseHeaders as $header) {

            if ((stripos($header, 'Content-Length:')) === 0) {

                $stream->setSize(trim(substr($header, 15)));

            }

        }

    }



    /**

     * Create a resource and check to ensure it was created successfully

     *

     * @param callable $callback Closure to invoke that must return a valid resource

     *

     * @return resource

     * @throws RuntimeException on error

     */

    protected function createResource($callback)

    {

        $errors = null;

        set_error_handler(function ($_, $msg, $file, $line) use (&$errors) {

            $errors[] = array(

                'message' => $msg,

                'file'    => $file,

                'line'    => $line

            );

            return true;

        });

        $resource = call_user_func($callback);

        restore_error_handler();



        if (!$resource) {

            $message = 'Error creating resource. ';

            foreach ($errors as $err) {

                foreach ($err as $key => $value) {

                    $message .= "[$key] $value" . PHP_EOL;

                }

            }

            throw new RuntimeException(trim($message));

        }



        return $resource;

    }

}