Batch.php 4.2 KB
Newer Older
Ad Schellevis's avatar
Ad Schellevis committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
<?php
/*
 * Copyright 2012 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

if (!class_exists('Google_Client')) {
  require_once dirname(__FILE__) . '/../autoload.php';
}

/**
 * Class to handle batched requests to the Google API service.
 */
class Google_Http_Batch
{
  /** @var string Multipart Boundary. */
  private $boundary;

  /** @var array service requests to be executed. */
  private $requests = array();

  /** @var Google_Client */
  private $client;

  private $expected_classes = array();

  private $base_path;

  public function __construct(Google_Client $client, $boundary = false)
  {
    $this->client = $client;
    $this->base_path = $this->client->getBasePath();
    $this->expected_classes = array();
    $boundary = (false == $boundary) ? mt_rand() : $boundary;
    $this->boundary = str_replace('"', '', $boundary);
  }

  public function add(Google_Http_Request $request, $key = false)
  {
    if (false == $key) {
      $key = mt_rand();
    }

    $this->requests[$key] = $request;
  }

  public function execute()
  {
    $body = '';

    /** @var Google_Http_Request $req */
    foreach ($this->requests as $key => $req) {
      $body .= "--{$this->boundary}\n";
      $body .= $req->toBatchString($key) . "\n";
      $this->expected_classes["response-" . $key] = $req->getExpectedClass();
    }

    $body = rtrim($body);
    $body .= "\n--{$this->boundary}--";

    $url = $this->base_path . '/batch';
    $httpRequest = new Google_Http_Request($url, 'POST');
    $httpRequest->setRequestHeaders(
        array('Content-Type' => 'multipart/mixed; boundary=' . $this->boundary)
    );

    $httpRequest->setPostBody($body);
    $response = $this->client->getIo()->makeRequest($httpRequest);

    return $this->parseResponse($response);
  }

  public function parseResponse(Google_Http_Request $response)
  {
    $contentType = $response->getResponseHeader('content-type');
    $contentType = explode(';', $contentType);
    $boundary = false;
    foreach ($contentType as $part) {
      $part = (explode('=', $part, 2));
      if (isset($part[0]) && 'boundary' == trim($part[0])) {
        $boundary = $part[1];
      }
    }

    $body = $response->getResponseBody();
    if ($body) {
      $body = str_replace("--$boundary--", "--$boundary", $body);
      $parts = explode("--$boundary", $body);
      $responses = array();

      foreach ($parts as $part) {
        $part = trim($part);
        if (!empty($part)) {
          list($metaHeaders, $part) = explode("\r\n\r\n", $part, 2);
          $metaHeaders = $this->client->getIo()->getHttpResponseHeaders($metaHeaders);

          $status = substr($part, 0, strpos($part, "\n"));
          $status = explode(" ", $status);
          $status = $status[1];

          list($partHeaders, $partBody) = $this->client->getIo()->ParseHttpResponse($part, false);
          $response = new Google_Http_Request("");
          $response->setResponseHttpCode($status);
          $response->setResponseHeaders($partHeaders);
          $response->setResponseBody($partBody);

          // Need content id.
          $key = $metaHeaders['content-id'];

          if (isset($this->expected_classes[$key]) &&
              strlen($this->expected_classes[$key]) > 0) {
            $class = $this->expected_classes[$key];
            $response->setExpectedClass($class);
          }

          try {
            $response = Google_Http_REST::decodeHttpResponse($response, $this->client);
            $responses[$key] = $response;
          } catch (Google_Service_Exception $e) {
            // Store the exception as the response, so successful responses
            // can be processed.
            $responses[$key] = $e;
          }
        }
      }

      return $responses;
    }

    return null;
  }
}