如果未提供文件名，则Multer挂起

Question

我想看看如果我在上载图像时不提供文件名，服务器的行为如何，而multer会挂起。 有没有一种方法可以让我得到multer超时？ 或在格式错误时抛出错误？ 创建DoS攻击非常容易，这就是我担心的原因。

这是我要发送的多部分标头，有意省略了文件名：

String header = "--" + boundary + LINE_FEED +
// "Content-Disposition: form-data; name=\"" + field_name + "\"; filename=\"" + "bitmap.jpg" + "\"" + LINE_FEED +
"Content-Disposition: form-data; name=\"" + field_name + "\"" + LINE_FEED +
"Content-Type: " + content_type + LINE_FEED +
"Content-Transfer-Encoding: binary" + LINE_FEED +
            LINE_FEED;

这是我挂起的服务器代码。 before upload打印，但before upload after upload或Error语句都不打印：

const Upload = multer( my_multer_options ); //makes use of multer's fileFilter which isn't even touched when a filename isn't provided.
const uploadFiles = Promise.promisify( Upload.fields([{name: "image", maxCount: 1}]) );

try
{
    console.log( "before upload" );  //prints

    await uploadFiles(context.req, context.res);

    console.log( "after upload" ); //never prints
}
catch ( error )
{
    console.log( "Error: " + error ); //never prints
}