i'm trying to create a HttpListener and accept Http request, for each HttpListenerContext i create a dedicated thread to do work on it like this

while(true)
{
    var context = listener.GetContext();
    Thread backgroundThread = new Thread(() => HandleContext(context));
    backgroundThread.Start();
}

In the HandleContext i do a Thread.Sleep(5000) to simulate the work and Console.WriteLine(DateTime.Now) for debugging purpose. But when i open 3 tabs in Chrome at the same time, only 2 tabs return but the result is duplicated and the last tab just keep hanging.

As far as i know, my threads has no shared data which could lead to deadlock, but this behavior seems like a deadlock, can you tell me what i'm doing wrong and how to fix it?

Here's my full code

class Program
    {
        private static HttpListener _listener;
        static void Main(string[] args)
        {
            HttpListener listener = new HttpListener();
            listener.Prefixes.Add("http://localhost:5001/");
            listener.Start();

            Listen(listener);
        }

        static void Listen(HttpListener listener)
        {
            while (true)
            {
                var context = listener.GetContext();
                Thread backgroundThread = new Thread(() => HandleContext(context));
                backgroundThread.Start();
            }
        }

        static void HandleContext(HttpListenerContext context)
        {
            Thread.Sleep(5000);

            Console.WriteLine($"Hello world, {DateTime.Now}");

            var responseContent = "Hello world";

            var buffer = Encoding.UTF8.GetBytes(responseContent);

            context.Response.OutputStream.Write(buffer, 0, buffer.Length);

            context.Response.OutputStream.Close();
            context.Response.Close();
        }
    }

CodePudding user response：

You didn't set the ContentLength64 property of your HttpListenerResponse stream ! Please try this

context.Response.ContentLength64 = buffer.LongLength;
using (Stream stream = context.Response.OutputStream)
{
    stream.Write(buffer, 0, buffer.Length);
}

CodePudding user response：

After a while, i figured out that the "deadlock" like behavior occurred because of the "orphan" GetContext which @Mat Hatter pointed out. And the Console.WriteLine being duplicated because of Google Chrome's behavior sending 2 requests, 1 for the website's content and 1 for the fav.icon. Hence, there's nothing wrong with the Console.WriteLine being duplicated.