调用Google Maps API，但响应为空

Question

我正在尝试与Laravel 5.3中的谷歌谷歌cURL通信。 我收到一个空响应，但状态码为200。 这是我的代码：

    public function directionGet($origin, $destination) {
    $callToGoogle = curl_init();
    $googleApiKey = '**************************';

    curl_setopt_array(
      $callToGoogle,
      array (
          CURLOPT_URL => 'http://maps.googleapis.com/maps/api/directions/json?origin='. $origin.'&destination=' . $destination . '&key= ' . $googleApiKey,
          CURLOPT_POST => true,
          CURLOPT_RETURNTRANSFER => true,
          CURLOPT_HEADER => 0
        )
    );
    $response = curl_exec($callToGoogle);
    curl_close($callToGoogle);
    return response()->json($response); 
}

Answer 1

我在您的代码中发现了几个问题1.我认为Google要求您使用https而不是http来保证安全性2. $ origin和$ destination在发送curl之前需要对url格式进行编码3. $ key后有1个空格

所以你尝试这段代码

public function directionGet($origin, $destination) {

    $googleApiKey = '****************************';

    $url          = 'https://maps.googleapis.com/maps/api/directions/json?origin='. urlencode($origin).'&destination=' . urlencode($destination) . '&mode=driving&key=' . $googleApiKey;

    $curl = curl_init();

    curl_setopt_array($curl, [
        CURLOPT_URL            => $url,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_ENCODING       => "",
        CURLOPT_MAXREDIRS      => 10,
        CURLOPT_TIMEOUT        => 30,
        CURLOPT_HTTP_VERSION   => CURL_HTTP_VERSION_1_1,
        CURLOPT_CUSTOMREQUEST  => "GET",
        CURLOPT_HTTPHEADER     => [
            "cache-control: no-cache"
        ],
    ]);

    $response = curl_exec($curl);

    return $response; 
}

$origin = "75 9th Ave, New York, NY";
$destination = "MetLife Stadium Dr East Rutherford, NJ 07073";

$directions = directionGet($origin, $destination);

---

您问我代码中有什么问题答案是1.我将http更改为https 2.我添加了修改标头（删除标头，因为它使用了get方法）3.我以url格式（urlencode）对字符串进行编码

我以您的代码为例

function directionGet($origin, $destination) {
    $callToGoogle = curl_init();
    $googleApiKey = '*************************';

    curl_setopt_array(
      $callToGoogle,
      array (
          CURLOPT_URL => 'https://maps.googleapis.com/maps/api/directions/json?origin='. urlencode($origin).'&destination=' . urlencode($destination) . '&mode=driving&key=' . $googleApiKey,
          CURLOPT_CUSTOMREQUEST => "GET",
          CURLOPT_RETURNTRANSFER => true,
        )
    );
    $response = curl_exec($callToGoogle);
    curl_close($callToGoogle);
    return $response; 
}

希望这个帮助