How to listen properly with HttpListener
-
06-06-2023 - |
質問
I've been writing a server for an app of mine. Due to suggestions, I decided to use HttpListener
to listen for incoming connections in an async
method. My current code is as following:
public static async void StartServerAsync()
{
while (true)
{
Console.WriteLine("Waiting for client.. ");
var context = await listener.GetContextAsync();
Console.WriteLine("Client connected!");
// ReSharper disable once CSharpWarnings::CS4014
Task.Factory.StartNew(() => ProcessClient(context));
}
listener.Close();
}
This method is started with this:
public static void ServerBoot()
{
listener.Prefixes.Add("http://localhost:1000/");
listener.Start();
StartServerAsync();
}
The ProcessClient()
method is as following:
private static void ProcessClient(HttpListenerContext context)
{
try
{
var request = context.Request;
string response;
using (var reader = new StreamReader(request.InputStream, request.ContentEncoding))
{
response = reader.ReadToEnd();
}
Console.WriteLine("Got command: {0}", response);
}
catch (WebException)
{
Console.WriteLine("Error reading string, closing..");
return;
}
}
Right now it's only supposed to get the string posted. However, when I run the client with this code:
Console.WriteLine(" -- Bagrut Client -- ");
Console.Write("Enter IP of server to connect to: ");
// ReSharper disable once AssignNullToNotNullAttribute
var ip = Console.ReadLine();
WebClient client = new WebClient();
var response = client.UploadString(ip, "query");
Console.WriteLine("Type of response is {0}", response);
the server does not do anything. As you can see in ProcessClient()
, and in the server loop itself, it should at least say something when a client connects. However, when the code is run, nothing happens. Am I doing something wrong?
EDIT: new code:
public static void ServerBoot()
{
HttpListener listener = new HttpListener();
listener.Prefixes.Add("http://localhost:1337/");
listener.Start();
StartServerAsync(listener).ContinueWith(task => { });
}
private static void ProcessClient(HttpListenerContext context)
{
try
{
var request = context.Request;
string response;
using (var reader = new StreamReader(request.InputStream, request.ContentEncoding))
{
response = reader.ReadToEnd();
}
Console.WriteLine("Got command: {0}", response);
}
catch (WebException)
{
Console.WriteLine("Error reading string, closing..");
return;
}
}
private static async Task StartServerAsync(HttpListener listener)
{
while (true)
{
Console.WriteLine("Waiting for client.. ");
var context = await listener.GetContextAsync();
Console.WriteLine("Client connected!");
// ReSharper disable once CSharpWarnings::CS4014
Task.Factory.StartNew(() => StartServerAsync(listener));
ProcessClient(context);
await StartServerAsync(listener);
}
listener.Close();
}
正しい解決策はありません
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