Add publishing to the server
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daeb375c16
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317fc97652
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@ -1,4 +1,6 @@
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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@ -9,6 +11,9 @@ namespace Ooui
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{
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public class Server
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{
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readonly Dictionary<string, Func<Element>> publishedPaths =
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new Dictionary<string, Func<Element>> ();
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public Task RunAsync (string listenerPrefix)
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{
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return RunAsync (listenerPrefix, CancellationToken.None);
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@ -22,22 +27,66 @@ namespace Ooui
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Console.WriteLine ($"Listening at {listenerPrefix}...");
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while (!token.IsCancellationRequested) {
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var listenerContext = await listener.GetContextAsync ();
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var listenerContext = await listener.GetContextAsync ().ConfigureAwait (false);
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if (listenerContext.Request.IsWebSocketRequest) {
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ProcessWebSocketRequest (listenerContext, token);
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}
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else {
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listenerContext.Response.StatusCode = 400;
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listenerContext.Response.Close ();
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ProcessRequest (listenerContext, token);
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}
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}
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}
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public void Publish (string path, Func<Element> elementCtor)
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{
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System.Console.WriteLine($"PUBLISH {path}");
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publishedPaths[path] = elementCtor;
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}
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public void Publish (string path, Element element)
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{
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Publish (path, () => element);
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}
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void ProcessRequest (HttpListenerContext listenerContext, CancellationToken token)
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{
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var url = listenerContext.Request.Url;
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var path = url.LocalPath;
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Console.WriteLine ($"{listenerContext.Request.HttpMethod} {url.LocalPath}");
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Func<Element> ctor;
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if (publishedPaths.TryGetValue (path, out ctor)) {
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var element = ctor ();
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RegisterElement (element);
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WriteElementHtml (element, listenerContext.Response);
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}
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else {
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listenerContext.Response.StatusCode = 404;
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listenerContext.Response.Close ();
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}
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}
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void RegisterElement (Element element)
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{
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}
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void WriteElementHtml (Element element, HttpListenerResponse response)
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{
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response.StatusCode = 200;
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using (var s = response.OutputStream) {
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using (var w = new StreamWriter (s, Encoding.UTF8)) {
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w.WriteLine ($"Hello {element}");
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}
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}
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response.Close ();
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}
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async void ProcessWebSocketRequest (HttpListenerContext listenerContext, CancellationToken token)
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{
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WebSocketContext webSocketContext = null;
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try {
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webSocketContext = await listenerContext.AcceptWebSocketAsync(subProtocol: null);
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webSocketContext = await listenerContext.AcceptWebSocketAsync(subProtocol: null).ConfigureAwait (false);
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Console.WriteLine ("Accepted WebSocket: {0}", webSocketContext);
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}
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catch (Exception e) {
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@ -58,26 +107,26 @@ namespace Ooui
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var receiveResult = await webSocket.ReceiveAsync(new ArraySegment<byte>(receiveBuffer), token);
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if (receiveResult.MessageType == WebSocketMessageType.Close) {
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await webSocket.CloseAsync (WebSocketCloseStatus.NormalClosure, "", token);
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await webSocket.CloseAsync (WebSocketCloseStatus.NormalClosure, "", token).ConfigureAwait (false);
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}
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else if (receiveResult.MessageType == WebSocketMessageType.Binary) {
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await webSocket.CloseAsync (WebSocketCloseStatus.InvalidMessageType, "Cannot accept binary frame", token);
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await webSocket.CloseAsync (WebSocketCloseStatus.InvalidMessageType, "Cannot accept binary frame", token).ConfigureAwait (false);
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}
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else {
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var size = receiveResult.Count;
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while (!receiveResult.EndOfMessage) {
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if (size >= receiveBuffer.Length) {
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await webSocket.CloseAsync (WebSocketCloseStatus.MessageTooBig, "Message too big", token);
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await webSocket.CloseAsync (WebSocketCloseStatus.MessageTooBig, "Message too big", token).ConfigureAwait (false);
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return;
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}
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receiveResult = await webSocket.ReceiveAsync (new ArraySegment<byte>(receiveBuffer, size, receiveBuffer.Length - size), token);
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receiveResult = await webSocket.ReceiveAsync (new ArraySegment<byte>(receiveBuffer, size, receiveBuffer.Length - size), token).ConfigureAwait (false);
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size += receiveResult.Count;
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}
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var receivedString = Encoding.UTF8.GetString (receiveBuffer, 0, size);
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Console.WriteLine ("RECEIVED: {0}", receivedString);
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var outputBuffer = new ArraySegment<byte> (Encoding.UTF8.GetBytes ($"You said: {receivedString}"));
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await webSocket.SendAsync (outputBuffer, WebSocketMessageType.Text, true, token);
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await webSocket.SendAsync (outputBuffer, WebSocketMessageType.Text, true, token).ConfigureAwait (false);
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}
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}
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}
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@ -9,6 +9,8 @@ namespace Samples
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{
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Console.WriteLine ("Hello World!");
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var server = new Server ();
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var button = new Button();
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server.Publish ("/button", button);
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server.RunAsync ("http://*:8080/").Wait ();
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return 0;
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}
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