php - Whatsapp Business Cloud API 在尝试下载媒体时返回空字符串

Question

在成功检索媒体 URL 并将其存储在文件请求的 $mediaURL 变量中后，我使用了以下代码行 (PHP)，但它返回了一个空字符串。已经尝试使用 postman 并返回 500 内部服务器错误...

** 已编辑 **

self::writeLog('Media URL: '.$mediaURL);
self::writeLog('Preparing to download media - id: '.$media_id);

$curl = curl_init($mediaURL);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

$headers = array(
    "Authorization: Bearer ".self::$auth_token,
);

curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);

curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);

if (($resp = curl_exec($curl)) === false) {
    self::writeLog('cURL Error: '.curl_error($curl));
} else if ($resp == '') {
    self::writeLog('Empty string.');
    self::writeLog('URL: '.$mediaURL);
    self::writeLog('Headers: '.$headers[0]);
} else {
    self::writeLog($resp);
}
            

• writeLog 只是我用来将这些消息写入 txt 文件的一种方法。

Answer 1

我以前遇到过这个问题，原因是没有将 User-Agent 传递给 API导致错误的值返回

我使用以下方法下载 whatsapp-cloud 媒体 & 它对我来说工作正常

public function grabImage(string $url,string  $saveto) : bool {
    
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 0);
    curl_setopt($ch, CURLOPT_TIMEOUT, 400);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch,CURLOPT_CUSTOMREQUEST , "GET");
    curl_setopt($ch,CURLOPT_ENCODING , "");

    $headers    = [];
    $headers[]  = "Authorization: Bearer " . self::$adminToken;
    $headers[]  = "Accept-Language:en-US,en;q=0.5";
    $headers[]  = "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36";
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    $raw = curl_exec($ch);
    
    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    
    if((int)$httpcode == 200){
        // here save the $row content of file 
    }
    
    return false;
}