当代码在Google App Engine Server中时，未使用Oauth2从Gmail联系人API中获取访问令牌

Question

我正在使用zend-framework2和google-app-engine服务器导入所有gmail联系人列表。我在登录后从gmail得到了授权码。当使用此授权码访问curl以获取访问令牌时，它会给出空白数组作为响应。

此外，这个应用程序是一个收费的应用程序在谷歌应用程序引擎。并且已经设置好了

extension = "curl.so"

在php.ini文件中。而且我提供的证书是正确的。

// Import Gmail Contacts
$client_id='xxxxxxxxxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com'; 
$client_secret='xxxxxxxxxxxxxx-xxxxxxxxx';
$redirect_uri='http://xxxxxxxxxxxxxxx.appspot.com/u/invite/gmailCallback';
$max_results = 1000;
if(isset($_GET["code"]) && $_GET["code"] != '') {
    $auth_code = $_GET["code"];

    $fields=array(
        'code'=>  urlencode($auth_code),
        'client_id'=>  urlencode($client_id),
        'client_secret'=>  urlencode($client_secret),
        'redirect_uri'=>  urlencode($redirect_uri),
        'grant_type'=>  urlencode('authorization_code')
    );
    $post = '';
    foreach($fields as $key=>$value) { $post .= $key.'='.$value.'&'; }
    $post = rtrim($post,'&');

    $curl = curl_init();
    curl_setopt($curl,CURLOPT_URL,'https://accounts.google.com/o/oauth2/token');
    curl_setopt($curl,CURLOPT_POST,5);
    curl_setopt($curl,CURLOPT_POSTFIELDS,$post);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER,TRUE);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER,FALSE);
    $result = curl_exec($curl);
    //$info = curl_getinfo($curl);
    //echo "<pre>"; print_r($info); die;
    curl_close($curl);

    $response =  json_decode($result);
    //echo "<pre>"; var_dump($response); die;
    if(isset($response->access_token) && $response->access_token != '') {

        $accesstoken = $response->access_token;

        $url = 'https://www.google.com/m8/feeds/contacts/default/full?max-results='.$max_results.'&oauth_token='.$accesstoken;
        //$url = 'https://www.google.com/m8/feeds/contacts/default/full?oauth_token='.$accesstoken;
        $xmlresponse =  $this->curl_file_get_contents($url);

        //At times you get Authorization error from Google.
        if((strlen(stristr($xmlresponse,'Authorization required'))>0) && (strlen(stristr($xmlresponse,'Error '))>0)) {
            //$returnArr['error_msg'] = "Something went wrong to import contacts!!";
            echo '<h2>Something went wrong to import contacts !!</h2>';die;
        } else {
            $xml =  new SimpleXMLElement($xmlresponse);
            $xml->registerXPathNamespace('gd', 'http://schemas.google.com/g/2005');
            $result = $xml->xpath('//gd:email');
            //echo "<pre>"; print_r($result); die;
            foreach ($result as $title) {
                $emailsArr[] = (string) $title->attributes()->address;
            }
        }
    }

}

请帮帮忙。

Answer 1

根据以前的经验(和this的回答)，我不认为App Engine上启用了cURL，因为它不支持C扩展。

你得用URL Fetch代替，例如：

$data = ['data' => 'this', 'data2' => 'that'];
$data = http_build_query($data);
$context = [
  'http' => [
    'method' => 'GET',
    'header' => "custom-header: custom-value\r\n" .
                "custom-header-two: custom-value-2\r\n",
    'content' => $data
  ]
];

$context = stream_context_create($context);
$result  = file_get_contents('http://app.com/path?query=update', false, $context);

Answer 2

App engine支持cURL，但似乎有缺陷。我在通过谷歌进行OAuth身份验证时遇到了同样的问题。POST cURL调用只返回FALSE，没有任何错误消息。这是官方的错误报告：https://code.google.com/p/googleappengine/issues/detail?id=11985

你现在能做的就是切换到url抓取功能。要发出POST请求，可以使用以下函数：

protected function _call($url, array $params, $method = 'GET', array $headers = [])
{        
    $query = http_build_query($params);

    $headers_str = '';

    if ($headers) {
        foreach ($headers as $name => $value) {
            $headers_str .= $name . ': ' . $value . "\r\n";
        }
    }

    $headers_str .= "Content-type: "."application/x-www-form-urlencoded"."\r\n";

    $options =
        array('http'=>
          array(
            'method' => $method,
            'header' => $headers_str,
            'content' => $query,
            'ignore_errors' => true,
          )
    );

    if ($method === 'POST') {
        $options['http']['content'] = $query;
    } else if ($query) {
        $url .= '?' . $query;
    }

    $context = stream_context_create($options);

    $response = file_get_contents($url, false, $context);

    // check for zipped response and decode it
    if (array_search('Content-Encoding: gzip', $http_response_header)) {
        $response = gzinflate(substr($response, 10, -8));
    }

    return $response;
}

或者，您可以尝试使用这个cURL包装库https://github.com/azayarni/purl，它是在GAE提供cURL支持之前实现的。希望对您有所帮助：)