c# - .NET 套接字网络服务器 HTTP POST 请求正文

Question

我正在用 C# 做一个嵌入式项目，我已经编写了一个基于套接字的 Web 服务器。一切正常，除了我一辈子都无法获得请求正文。 Content-Length 说有 12 个字符，但 socket.Recieve 方法只获取标题。

while (true)
{

    using (Socket clientSocket = listeningSocket.Accept())
    {
        IPEndPoint clientIP = clientSocket.RemoteEndPoint as IPEndPoint;
        Debug.Print("Received request from " + clientIP.ToString());
        var x = clientSocket.RemoteEndPoint;

        int availableBytes = clientSocket.Available;

        Debug.Print(DateTime.Now.ToString() + " " + availableBytes.ToString() + " request bytes available");

        int bytesReceived = (availableBytes > maxRequestSize ? maxRequestSize : availableBytes);
        if (bytesReceived > 0)
        {
            byte[] buffer = new byte[bytesReceived]; // Buffer probably should be larger than this.
            int readByteCount = clientSocket.Receive(buffer, bytesReceived, SocketFlags.None);

            using (Request r = new Request(clientSocket, Encoding.UTF8.GetChars(buffer)))
            {
                Debug.Print(DateTime.Now.ToString() + " " + r.URL);
                if (requestReceived != null) requestReceived(r);

            }


        }
    }
    Thread.Sleep(10);
}

可用字节数 = 499

bytesReceived = 499

readByteCount = 487(短 12 个字符)

我在这里错过了什么？主体是多部分表单数据(如果有任何区别的话)。

Answer 1

int bytesReceived = (availableBytes > maxRequestSize ? maxRequestSize : availableBytes);

如果 maxRequestSize 是 487，那么您将得到您描述的结果。

还要记住 Content-Length 不是字节 - 它是八位字节:What's the "Content-Length" field in HTTP header? (好吧，我太迂腐了——八位字节是 8 位；))