Whatsapp Business Cloud API 在嘗試下載媒體時返回空字符串

Question

在成功檢索媒體 URL 並將其存儲在 $mediaURL 變量中以進行文件請求后，我正在使用以下代碼行 (PHP)，但它返回一個空字符串。 已經嘗試使用郵遞員，它返回 500 內部服務器錯誤...

** 已編輯 **

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 只是我用來將這些消息寫入 txt 文件的一種方法。

Answer 1

我之前遇到過這個問題，原因是沒有將User-Agent傳遞給 API 導致錯誤的值返回

我使用以下方法下載了 whatsapp-cloud 媒體，它適用於我

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;
}