使用 PHP 的 Google Tracks API“错误请求”答案

【问题标题】：Google Tracks API "Bad Request" using PHP使用 PHP 的 Google Tracks API“错误请求”
【发布时间】：2015-02-26 10:16:55
【问题描述】：

我正在使用Google Tracks API 构建一个简单的基于网络的程序来跟踪具有发送纬度和经度坐标的跟踪设备的车辆。我正在使用 PHP 和 OAuth2 PHP library 进行授权连接。

授权并获得访问令牌后，我正在请求创建实体。尽管我似乎无法使其正常工作并不断收到“400 Bad Request”响应。遵循documentation 中显示的所有步骤。

这是我的代码：

$url = 'https://www.googleapis.com/tracks/v1/entities/create/?access_token='.$parsedAuth['access_token'];

$data = array('entities' => array( "name"=> "Chevrolet" ));
$json_data = json_encode($data);
$data_length = http_build_query($data);

$options = array(
     'http' => array(
            'header'  => "Content-type: application/json\r\n". "Content-Length: " . strlen($data_length) . "\r\n",
            'method'  => 'POST',
            'content' => $json_data
        ),
    );

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

    var_dump($response);

确切的错误是：“无法打开流：HTTP 请求失败！HTTP/1.0 400 错误请求”

为什么我收到一个错误的请求？什么是注册这些实体并返回 ID 的好请求？谢谢

【问题讨论】：

标签： php google-maps google-geocoding-api

【解决方案1】：

这里给出的答案是错误的。文档指出它必须是 POST see here 我的问题不在于 Auth，而在于 Tracks API 本身。我最终开始使用 CURL 创建请求，它工作得很好。

【讨论】：

【解决方案2】：

请。这是带有 CURL 的 PHP。 100% 有效。

//Google maps tracks connection
//Get Files From PHP Library
require_once 'google-api-php-client/src/Google/autoload.php';
require_once 'google-api-php-client/src/Google/Service/MapsEngine.php';

//Set Client Credentials
$client_id = '*************.apps.googleusercontent.com'; //Client ID
$service_account_name = '************@developer.gserviceaccount.com'; //Email Address
$client_email = '*************@developer.gserviceaccount.com';
$private_key = file_get_contents('************.p12');
$scopes = array('https://www.googleapis.com/auth/tracks');

//Create Client
$client = new Google_Client();

$client->setApplicationName("Client_Library_Examples");

//Send Credentials
$credentials = new Google_Auth_AssertionCredentials(
    $client_email,
    $scopes,
    $private_key
);
$client->setAssertionCredentials($credentials);

if ($client->getAuth()->isAccessTokenExpired()) {
  $client->getAuth()->refreshTokenWithAssertion($credentials);
}

if (isset($_SESSION['service_token'])) {
  $client->setAccessToken($_SESSION['service_token']);
}

$client->setAssertionCredentials($credentials);

$_SESSION['service_token'] = $client->getAccessToken();
foreach ($_SESSION as $key=> $value) {
    $vars = json_decode($value);
}
$parsedAuth = (array) $vars;
$token = $parsedAuth['access_token'];
//all functions in the program use this auth token- It should be global for easy accesses. 
global $token;


function createEntities(){
    global $token;
    $url = 'https://www.googleapis.com/tracks/v1/entities/create/?access_token='.$token;

    //FIX ME: fields is temporarily hard coded- should be brought from DB
    $fields = array(
                'entities' => array(
                    'name' => "DemoTruck",
                    'type' => "AUTOMOBILE"
                    ),
        );

    //json string the data for the POST
    $query_string = '';
    foreach($fields as $key => $array) {
        $query_string .= '{"' . urlencode($key).'":[{';
        foreach($array as $k => $v) {
            $query_string .= '"' . urlencode($k) . '":"' . urlencode($v) . '",';
        }
    }
    $str = rtrim($query_string , ',');
    $fstr = $str.'}]}';

    $length = strlen( $fstr );
    //open connection
    $ch = curl_init();
    //test connection
    if (FALSE === $ch)
    throw new Exception('failed to initialize');

    //set options
    $header = array('Content-type: application/json');
    curl_setopt($ch,CURLOPT_URL, $url);
    curl_setopt($ch,CURLOPT_HTTPHEADER, $header);
    curl_setopt($ch,CURLOPT_POSTFIELDS, $fstr);

    $result = curl_exec($ch);

    //dump in case of error
    if (FALSE === $result){
        var_dump( curl_error($ch) );
        var_dump( curl_getinfo($ch) ); 
    } 

    //close connection
    curl_close($ch);
}

【讨论】：