StreamHandler.php in Auth0 Single Sign On 8.2

Namespace

GuzzleHttp\Handler

File

vendor/guzzlehttp/guzzle/src/Handler/StreamHandler.php

<?php

namespace GuzzleHttp\Handler;

use GuzzleHttp\Exception\ConnectException;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\Promise\FulfilledPromise;
use GuzzleHttp\Promise\PromiseInterface;
use GuzzleHttp\Psr7;
use GuzzleHttp\TransferStats;
use GuzzleHttp\Utils;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\StreamInterface;

/**
 * HTTP handler that uses PHP's HTTP stream wrapper.
 */
class StreamHandler {
  private $lastHeaders = [];

  /**
   * Sends an HTTP request.
   *
   * @param RequestInterface $request Request to send.
   * @param array            $options Request transfer options.
   *
   * @return PromiseInterface
   */
  public function __invoke(RequestInterface $request, array $options) {

    // Sleep if there is a delay specified.
    if (isset($options['delay'])) {
      usleep($options['delay'] * 1000);
    }
    $startTime = isset($options['on_stats']) ? Utils::currentTime() : null;
    try {

      // Does not support the expect header.
      $request = $request
        ->withoutHeader('Expect');

      // Append a content-length header if body size is zero to match
      // cURL's behavior.
      if (0 === $request
        ->getBody()
        ->getSize()) {
        $request = $request
          ->withHeader('Content-Length', '0');
      }
      return $this
        ->createResponse($request, $options, $this
        ->createStream($request, $options), $startTime);
    } catch (\InvalidArgumentException $e) {
      throw $e;
    } catch (\Exception $e) {

      // Determine if the error was a networking error.
      $message = $e
        ->getMessage();

      // This list can probably get more comprehensive.
      if (strpos($message, 'getaddrinfo') || strpos($message, 'Connection refused') || strpos($message, "couldn't connect to host") || strpos($message, "connection attempt failed")) {
        $e = new ConnectException($e
          ->getMessage(), $request, $e);
      }
      $e = RequestException::wrapException($request, $e);
      $this
        ->invokeStats($options, $request, $startTime, null, $e);
      return \GuzzleHttp\Promise\rejection_for($e);
    }
  }
  private function invokeStats(array $options, RequestInterface $request, $startTime, ResponseInterface $response = null, $error = null) {
    if (isset($options['on_stats'])) {
      $stats = new TransferStats($request, $response, Utils::currentTime() - $startTime, $error, []);
      call_user_func($options['on_stats'], $stats);
    }
  }
  private function createResponse(RequestInterface $request, array $options, $stream, $startTime) {
    $hdrs = $this->lastHeaders;
    $this->lastHeaders = [];
    $parts = explode(' ', array_shift($hdrs), 3);
    $ver = explode('/', $parts[0])[1];
    $status = $parts[1];
    $reason = isset($parts[2]) ? $parts[2] : null;
    $headers = \GuzzleHttp\headers_from_lines($hdrs);
    list($stream, $headers) = $this
      ->checkDecode($options, $headers, $stream);
    $stream = Psr7\stream_for($stream);
    $sink = $stream;
    if (strcasecmp('HEAD', $request
      ->getMethod())) {
      $sink = $this
        ->createSink($stream, $options);
    }
    $response = new Psr7\Response($status, $headers, $sink, $ver, $reason);
    if (isset($options['on_headers'])) {
      try {
        $options['on_headers']($response);
      } catch (\Exception $e) {
        $msg = 'An error was encountered during the on_headers event';
        $ex = new RequestException($msg, $request, $response, $e);
        return \GuzzleHttp\Promise\rejection_for($ex);
      }
    }

    // Do not drain when the request is a HEAD request because they have
    // no body.
    if ($sink !== $stream) {
      $this
        ->drain($stream, $sink, $response
        ->getHeaderLine('Content-Length'));
    }
    $this
      ->invokeStats($options, $request, $startTime, $response, null);
    return new FulfilledPromise($response);
  }
  private function createSink(StreamInterface $stream, array $options) {
    if (!empty($options['stream'])) {
      return $stream;
    }
    $sink = isset($options['sink']) ? $options['sink'] : fopen('php://temp', 'r+');
    return is_string($sink) ? new Psr7\LazyOpenStream($sink, 'w+') : Psr7\stream_for($sink);
  }
  private function checkDecode(array $options, array $headers, $stream) {

    // Automatically decode responses when instructed.
    if (!empty($options['decode_content'])) {
      $normalizedKeys = \GuzzleHttp\normalize_header_keys($headers);
      if (isset($normalizedKeys['content-encoding'])) {
        $encoding = $headers[$normalizedKeys['content-encoding']];
        if ($encoding[0] === 'gzip' || $encoding[0] === 'deflate') {
          $stream = new Psr7\InflateStream(Psr7\stream_for($stream));
          $headers['x-encoded-content-encoding'] = $headers[$normalizedKeys['content-encoding']];

          // Remove content-encoding header
          unset($headers[$normalizedKeys['content-encoding']]);

          // Fix content-length header
          if (isset($normalizedKeys['content-length'])) {
            $headers['x-encoded-content-length'] = $headers[$normalizedKeys['content-length']];
            $length = (int) $stream
              ->getSize();
            if ($length === 0) {
              unset($headers[$normalizedKeys['content-length']]);
            }
            else {
              $headers[$normalizedKeys['content-length']] = [
                $length,
              ];
            }
          }
        }
      }
    }
    return [
      $stream,
      $headers,
    ];
  }

  /**
   * Drains the source stream into the "sink" client option.
   *
   * @param StreamInterface $source
   * @param StreamInterface $sink
   * @param string          $contentLength Header specifying the amount of
   *                                       data to read.
   *
   * @return StreamInterface
   * @throws \RuntimeException when the sink option is invalid.
   */
  private function drain(StreamInterface $source, StreamInterface $sink, $contentLength) {

    // If a content-length header is provided, then stop reading once
    // that number of bytes has been read. This can prevent infinitely
    // reading from a stream when dealing with servers that do not honor
    // Connection: Close headers.
    Psr7\copy_to_stream($source, $sink, strlen($contentLength) > 0 && (int) $contentLength > 0 ? (int) $contentLength : -1);
    $sink
      ->seek(0);
    $source
      ->close();
    return $sink;
  }

  /**
   * Create a resource and check to ensure it was created successfully
   *
   * @param callable $callback Callable that returns stream resource
   *
   * @return resource
   * @throws \RuntimeException on error
   */
  private function createResource(callable $callback) {
    $errors = null;
    set_error_handler(function ($_, $msg, $file, $line) use (&$errors) {
      $errors[] = [
        'message' => $msg,
        'file' => $file,
        'line' => $line,
      ];
      return true;
    });
    $resource = $callback();
    restore_error_handler();
    if (!$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;
  }
  private function createStream(RequestInterface $request, array $options) {
    static $methods;
    if (!$methods) {
      $methods = array_flip(get_class_methods(__CLASS__));
    }

    // HTTP/1.1 streams using the PHP stream wrapper require a
    // Connection: close header
    if ($request
      ->getProtocolVersion() == '1.1' && !$request
      ->hasHeader('Connection')) {
      $request = $request
        ->withHeader('Connection', 'close');
    }

    // Ensure SSL is verified by default
    if (!isset($options['verify'])) {
      $options['verify'] = true;
    }
    $params = [];
    $context = $this
      ->getDefaultContext($request);
    if (isset($options['on_headers']) && !is_callable($options['on_headers'])) {
      throw new \InvalidArgumentException('on_headers must be callable');
    }
    if (!empty($options)) {
      foreach ($options as $key => $value) {
        $method = "add_{$key}";
        if (isset($methods[$method])) {
          $this
            ->{$method}($request, $context, $value, $params);
        }
      }
    }
    if (isset($options['stream_context'])) {
      if (!is_array($options['stream_context'])) {
        throw new \InvalidArgumentException('stream_context must be an array');
      }
      $context = array_replace_recursive($context, $options['stream_context']);
    }

    // Microsoft NTLM authentication only supported with curl handler
    if (isset($options['auth']) && is_array($options['auth']) && isset($options['auth'][2]) && 'ntlm' == $options['auth'][2]) {
      throw new \InvalidArgumentException('Microsoft NTLM authentication only supported with curl handler');
    }
    $uri = $this
      ->resolveHost($request, $options);
    $context = $this
      ->createResource(function () use ($context, $params) {
      return stream_context_create($context, $params);
    });
    return $this
      ->createResource(function () use ($uri, &$http_response_header, $context, $options) {
      $resource = fopen((string) $uri, 'r', null, $context);
      $this->lastHeaders = $http_response_header;
      if (isset($options['read_timeout'])) {
        $readTimeout = $options['read_timeout'];
        $sec = (int) $readTimeout;
        $usec = ($readTimeout - $sec) * 100000;
        stream_set_timeout($resource, $sec, $usec);
      }
      return $resource;
    });
  }
  private function resolveHost(RequestInterface $request, array $options) {
    $uri = $request
      ->getUri();
    if (isset($options['force_ip_resolve']) && !filter_var($uri
      ->getHost(), FILTER_VALIDATE_IP)) {
      if ('v4' === $options['force_ip_resolve']) {
        $records = dns_get_record($uri
          ->getHost(), DNS_A);
        if (!isset($records[0]['ip'])) {
          throw new ConnectException(sprintf("Could not resolve IPv4 address for host '%s'", $uri
            ->getHost()), $request);
        }
        $uri = $uri
          ->withHost($records[0]['ip']);
      }
      elseif ('v6' === $options['force_ip_resolve']) {
        $records = dns_get_record($uri
          ->getHost(), DNS_AAAA);
        if (!isset($records[0]['ipv6'])) {
          throw new ConnectException(sprintf("Could not resolve IPv6 address for host '%s'", $uri
            ->getHost()), $request);
        }
        $uri = $uri
          ->withHost('[' . $records[0]['ipv6'] . ']');
      }
    }
    return $uri;
  }
  private function getDefaultContext(RequestInterface $request) {
    $headers = '';
    foreach ($request
      ->getHeaders() as $name => $value) {
      foreach ($value as $val) {
        $headers .= "{$name}: {$val}\r\n";
      }
    }
    $context = [
      'http' => [
        'method' => $request
          ->getMethod(),
        'header' => $headers,
        'protocol_version' => $request
          ->getProtocolVersion(),
        'ignore_errors' => true,
        'follow_location' => 0,
      ],
    ];
    $body = (string) $request
      ->getBody();
    if (!empty($body)) {
      $context['http']['content'] = $body;

      // Prevent the HTTP handler from adding a Content-Type header.
      if (!$request
        ->hasHeader('Content-Type')) {
        $context['http']['header'] .= "Content-Type:\r\n";
      }
    }
    $context['http']['header'] = rtrim($context['http']['header']);
    return $context;
  }
  private function add_proxy(RequestInterface $request, &$options, $value, &$params) {
    if (!is_array($value)) {
      $options['http']['proxy'] = $value;
    }
    else {
      $scheme = $request
        ->getUri()
        ->getScheme();
      if (isset($value[$scheme])) {
        if (!isset($value['no']) || !\GuzzleHttp\is_host_in_noproxy($request
          ->getUri()
          ->getHost(), $value['no'])) {
          $options['http']['proxy'] = $value[$scheme];
        }
      }
    }
  }
  private function add_timeout(RequestInterface $request, &$options, $value, &$params) {
    if ($value > 0) {
      $options['http']['timeout'] = $value;
    }
  }
  private function add_verify(RequestInterface $request, &$options, $value, &$params) {
    if ($value === true) {

      // PHP 5.6 or greater will find the system cert by default. When
      // < 5.6, use the Guzzle bundled cacert.
      if (PHP_VERSION_ID < 50600) {
        $options['ssl']['cafile'] = \GuzzleHttp\default_ca_bundle();
      }
    }
    elseif (is_string($value)) {
      $options['ssl']['cafile'] = $value;
      if (!file_exists($value)) {
        throw new \RuntimeException("SSL CA bundle not found: {$value}");
      }
    }
    elseif ($value === false) {
      $options['ssl']['verify_peer'] = false;
      $options['ssl']['verify_peer_name'] = false;
      return;
    }
    else {
      throw new \InvalidArgumentException('Invalid verify request option');
    }
    $options['ssl']['verify_peer'] = true;
    $options['ssl']['verify_peer_name'] = true;
    $options['ssl']['allow_self_signed'] = false;
  }
  private function add_cert(RequestInterface $request, &$options, $value, &$params) {
    if (is_array($value)) {
      $options['ssl']['passphrase'] = $value[1];
      $value = $value[0];
    }
    if (!file_exists($value)) {
      throw new \RuntimeException("SSL certificate not found: {$value}");
    }
    $options['ssl']['local_cert'] = $value;
  }
  private function add_progress(RequestInterface $request, &$options, $value, &$params) {
    $this
      ->addNotification($params, function ($code, $a, $b, $c, $transferred, $total) use ($value) {
      if ($code == STREAM_NOTIFY_PROGRESS) {
        $value($total, $transferred, null, null);
      }
    });
  }
  private function add_debug(RequestInterface $request, &$options, $value, &$params) {
    if ($value === false) {
      return;
    }
    static $map = [
      STREAM_NOTIFY_CONNECT => 'CONNECT',
      STREAM_NOTIFY_AUTH_REQUIRED => 'AUTH_REQUIRED',
      STREAM_NOTIFY_AUTH_RESULT => 'AUTH_RESULT',
      STREAM_NOTIFY_MIME_TYPE_IS => 'MIME_TYPE_IS',
      STREAM_NOTIFY_FILE_SIZE_IS => 'FILE_SIZE_IS',
      STREAM_NOTIFY_REDIRECTED => 'REDIRECTED',
      STREAM_NOTIFY_PROGRESS => 'PROGRESS',
      STREAM_NOTIFY_FAILURE => 'FAILURE',
      STREAM_NOTIFY_COMPLETED => 'COMPLETED',
      STREAM_NOTIFY_RESOLVE => 'RESOLVE',
    ];
    static $args = [
      'severity',
      'message',
      'message_code',
      'bytes_transferred',
      'bytes_max',
    ];
    $value = \GuzzleHttp\debug_resource($value);
    $ident = $request
      ->getMethod() . ' ' . $request
      ->getUri()
      ->withFragment('');
    $this
      ->addNotification($params, function () use ($ident, $value, $map, $args) {
      $passed = func_get_args();
      $code = array_shift($passed);
      fprintf($value, '<%s> [%s] ', $ident, $map[$code]);
      foreach (array_filter($passed) as $i => $v) {
        fwrite($value, $args[$i] . ': "' . $v . '" ');
      }
      fwrite($value, "\n");
    });
  }
  private function addNotification(array &$params, callable $notify) {

    // Wrap the existing function if needed.
    if (!isset($params['notification'])) {
      $params['notification'] = $notify;
    }
    else {
      $params['notification'] = $this
        ->callArray([
        $params['notification'],
        $notify,
      ]);
    }
  }
  private function callArray(array $functions) {
    return function () use ($functions) {
      $args = func_get_args();
      foreach ($functions as $fn) {
        call_user_func_array($fn, $args);
      }
    };
  }

}

Classes

Name	Description
StreamHandler	HTTP handler that uses PHP's HTTP stream wrapper.