使用 HttpListener 获取 .net 中传入数据的格式

发布于 2024-09-19 18:31:24 字数 571 浏览 3 评论 0原文

我正在编写一个服务器端程序。我创建了一个 HttpListener 来监听传入的请求。我怎样才能知道正在发送什么类型的数据？例如，它是文本、图像、pdf、word？

如果我的代码有误，请更正下面的代码。我对此很陌生，我对 HTTP 概念的理解可能是错误的。谢谢。

main()
{
HttpListener listener = new HttpListener();
listener.Prefixes.Add("http://192.168.1.2/");
listener.Start();

while (true) //Keep on listening
{
context = listener.GetContext();
HttpListenerRequest request = context.Request;

//Do I get the request stream here, and do something with the stream to find out what data format is being sent?
Stream requestStream = request.InputStream;
}

}

原文

I am writing a server-side program.
I created a HttpListener to listen for incoming requests.
How can I find out what kind of data is being sent in? E.g. is it a text, image, pdf, word?

Pls correct my code below if it is wrong.
I'm really new to this and my understanding of the HTTP concepts may be wrong. Thanks.

main()
{
HttpListener listener = new HttpListener();
listener.Prefixes.Add("http://192.168.1.2/");
listener.Start();

while (true) //Keep on listening
{
context = listener.GetContext();
HttpListenerRequest request = context.Request;

//Do I get the request stream here, and do something with the stream to find out what data format is being sent?
Stream requestStream = request.InputStream;
}

}

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深海蓝天 2024-09-26 18:31:24

了解正在发送的数据类型的唯一简单方法是查看请求的 Content-Type 标头（通过 ContentType 属性公开），该标头应包含 MIME内容类型：

switch(request.ContentType)
{
    case "image/png":
    case "image/jpeg":
    case "image/bmp":
    case "image/gif":
    case "image/tiff":
        // OK, this is an image
        ...
        break;
    default:
        // Something else
        ...
        break;
}

请注意，这种方法并不总是有效，因为客户端可以在不指定 Content-Type 标头的情况下发送请求，或者发送与标头不匹配的数据...

The only easy way to know what type of data is being sent is by looking at the request's Content-Type header (exposed via the ContentType property), which should contain the MIME type of the content:

switch(request.ContentType)
{
    case "image/png":
    case "image/jpeg":
    case "image/bmp":
    case "image/gif":
    case "image/tiff":
        // OK, this is an image
        ...
        break;
    default:
        // Something else
        ...
        break;
}

Note that this approach won't always work, because the client could send a request without specifying the Content-Type header, or send data that doesn't match the header...

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