如何从Meta API（Whatsapp Media）下载媒体

Question

我已按照官方链接上的文档进行操作并检索了媒体 URL https://developers.facebook.com/docs/whatsapp/cloud-api/reference/media/#download-media

现在，一旦我有了 URL，我就会使用下面的 PHP 代码来下载保存在 FB 服务器上的文件，该服务器需要发送授权令牌，因此我在 PHP 中使用 CURL。

但是我保存的是空文件。

$ch             = curl_init($url);
$file_name      = basename($url);
$file_loc       = "./download/" . $MediaID . ".jpg" ;
$fp             = fopen($file_loc, 'wb');
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_TIMEOUT, 50);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Authorization: Bearer ' . $MetaToken) );
$result = curl_exec($ch); curl_close($ch);
$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$header = substr($response, 0, $header_size);
$body = substr($response, $header_size);
fwrite($fp, $body);
fclose($fp);

我也试过这样：

$file_loc   = "./download/" . $MediaID . ".jpg" ;
$fp         = fopen($file_loc, 'wb');
$curl       = curl_init();
curl_setopt_array($curl, array(
    CURLOPT_URL => $url,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => '',
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 0,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_USERAGENT => "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)",
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => 'GET',
    CURLOPT_HTTPHEADER => array('Authorization: Bearer ' . $waToken),
    ));
    $response = curl_exec($curl); curl_close($curl);
    fwrite($fp, $response); fclose($fp);

Answer 1

唷！通过更改用户代理，它终于起作用了

$file_loc   = "./download/" . $MediaID . ".jpg" ;
$fp         = fopen($file_loc, 'wb');
$curl       = curl_init();
curl_setopt_array($curl, array(
    CURLOPT_URL => $url,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => '',
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 0,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_USERAGENT => "PostmanRuntime/7.34.0",
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => 'GET',
    CURLOPT_HTTPHEADER => array('Authorization: Bearer ' . $waToken),
    ));
    $response = curl_exec($curl); curl_close($curl);
    fwrite($fp, $response); fclose($fp);