Merge Server into UI
This commit is contained in:
Frank A. Krueger
parent
9cee30ead9
commit
1033273484
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@ -18,10 +18,10 @@ function getNode (id) {
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function msgCreate (m) {
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const id = m.id;
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const tagName = m.k;
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const node = tagName === "text" ?
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const node = tagName === "#text" ?
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document.createTextNode ("") :
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document.createElement (tagName);
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if (tagName !== "text")
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if (tagName !== "#text")
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node.id = id;
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nodes[id] = node;
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console.log ("Created node", node);
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@ -50,6 +50,9 @@ function msgCall (m) {
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f.apply (node, m.v);
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}
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function msgListen (m) {
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}
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function processMessage (m) {
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switch (m.m) {
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case "nop":
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@ -63,6 +66,9 @@ function processMessage (m) {
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case "call":
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msgCall (m);
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break;
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case "listen":
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msgListen (m);
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break;
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default:
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console.error ("Unknown message type", m.m, m);
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}
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265
Ooui/Server.cs
265
Ooui/Server.cs
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@ -1,265 +0,0 @@
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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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using System.Net;
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using System.Net.WebSockets;
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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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readonly static byte[] clientJsBytes;
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static Server ()
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{
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var asm = typeof(Server).Assembly;
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// System.Console.WriteLine("ASM = {0}", asm);
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// foreach (var n in asm.GetManifestResourceNames()) {
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// System.Console.WriteLine(" {0}", n);
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// }
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using (var s = asm.GetManifestResourceStream ("Ooui.Client.js")) {
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using (var r = new StreamReader (s)) {
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clientJsBytes = Encoding.UTF8.GetBytes (r.ReadToEnd ());
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}
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}
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}
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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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}
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public async Task RunAsync (string listenerPrefix, CancellationToken token)
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{
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HttpListener listener = null;
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var started = false;
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while (!started) {
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try {
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listener = new HttpListener ();
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listener.Prefixes.Add (listenerPrefix);
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listener.Start ();
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started = true;
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}
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catch (System.Net.Sockets.SocketException ex) when
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(ex.SocketErrorCode == System.Net.Sockets.SocketError.AddressAlreadyInUse) {
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var wait = 5;
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Console.WriteLine ($"{listenerPrefix} is in use, trying again in {wait} seconds...");
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await Task.Delay (wait * 1000);
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}
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}
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Console.ForegroundColor = ConsoleColor.Green;
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Console.WriteLine ($"Listening at {listenerPrefix}...");
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Console.ResetColor ();
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while (!token.IsCancellationRequested) {
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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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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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var response = listenerContext.Response;
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Func<Element> ctor;
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if (path == "/client.js") {
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response.ContentLength64 = clientJsBytes.LongLength;
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response.ContentType = "application/javascript";
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response.ContentEncoding = Encoding.UTF8;
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response.AddHeader ("Cache-Control", "public, max-age=3600");
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using (var s = response.OutputStream) {
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s.Write (clientJsBytes, 0, clientJsBytes.Length);
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}
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}
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else if (publishedPaths.TryGetValue (path, out ctor)) {
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WriteElementHtml (path, response);
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}
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else {
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response.StatusCode = 404;
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response.Close ();
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}
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}
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void WriteElementHtml (string elementPath, HttpListenerResponse response)
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{
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response.StatusCode = 200;
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response.ContentType = "text/html";
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response.ContentEncoding = Encoding.UTF8;
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var html = Encoding.UTF8.GetBytes ($@"<html>
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<head><title>{elementPath}</title></head>
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<body>
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<script>rootElementPath = ""{elementPath}"";</script>
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<script src=""/client.js""> </script></body>
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</html>");
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response.ContentLength64 = html.LongLength;
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using (var s = response.OutputStream) {
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s.Write (html, 0, html.Length);
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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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//
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// Find the element
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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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Func<Element> ctor;
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if (!publishedPaths.TryGetValue (path, out ctor)) {
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listenerContext.Response.StatusCode = 404;
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listenerContext.Response.Close ();
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return;
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}
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Element element = null;
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try {
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element = ctor ();
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}
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catch (Exception ex) {
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listenerContext.Response.StatusCode = 500;
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listenerContext.Response.Close();
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Error ("Failed to create element", ex);
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return;
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}
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//
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// Connect the web socket
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//
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WebSocketContext webSocketContext = null;
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WebSocket webSocket = null;
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try {
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webSocketContext = await listenerContext.AcceptWebSocketAsync(subProtocol: "ooui-1.0").ConfigureAwait (false);
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webSocket = webSocketContext.WebSocket;
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Console.WriteLine ("WEBSOCKET {0}", listenerContext.Request.Url.LocalPath);
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}
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catch (Exception ex) {
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listenerContext.Response.StatusCode = 500;
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listenerContext.Response.Close();
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Error ("Failed to accept WebSocket", ex);
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return;
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}
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//
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// Preparse handlers for the element
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//
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Action<Message> onElementMessage = async m => {
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if (webSocket == null) return;
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try {
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await SendMessageAsync (webSocket, m, token);
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}
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catch (Exception ex) {
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Error ("Failed to handled element message", ex);
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}
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};
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//
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// Communicate!
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//
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try {
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//
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// Send message history, start sending updates, and add it to the body
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//
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foreach (var m in element.AllStateMessages) {
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if (webSocket.State == WebSocketState.Open) {
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await SendMessageAsync (webSocket, m, token);
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}
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}
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element.MessageSent += onElementMessage;
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await SendMessageAsync (webSocket, new Message {
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TargetId = "document.body",
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MessageType = MessageType.Call,
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Key = "appendChild",
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Value = new[] { element },
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}, token);
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//
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// Listen for events
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//
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var receiveBuffer = new byte[1024];
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while (webSocket.State == WebSocketState.Open && !token.IsCancellationRequested) {
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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).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).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).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).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).ConfigureAwait (false);
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}
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}
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}
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catch (WebSocketException ex) when (ex.WebSocketErrorCode == WebSocketError.ConnectionClosedPrematurely) {
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// The remote party closed the WebSocket connection without completing the close handshake.
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}
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catch (Exception ex) {
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Error ("Failed to process web socket", ex);
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}
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finally {
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element.MessageSent -= onElementMessage;
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webSocket?.Dispose ();
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}
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}
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Task SendMessageAsync (WebSocket webSocket, Message message, CancellationToken token)
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{
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var json = Newtonsoft.Json.JsonConvert.SerializeObject (message);
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var outputBuffer = new ArraySegment<byte> (Encoding.UTF8.GetBytes (json));
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return webSocket.SendAsync (outputBuffer, WebSocketMessageType.Text, true, token);
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}
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void Error (string message, Exception ex)
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{
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Console.ForegroundColor = ConsoleColor.Red;
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Console.WriteLine ("{0}: {1}", message, ex);
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Console.ResetColor ();
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}
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}
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}
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305
Ooui/UI.cs
305
Ooui/UI.cs
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@ -1,20 +1,313 @@
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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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using System.Net;
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using System.Net.WebSockets;
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namespace Ooui
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{
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public static class UI
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{
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public static void Publish (string path, object value)
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{
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static CancellationTokenSource serverCts;
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static readonly Dictionary<string, Func<Element>> publishedPaths =
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new Dictionary<string, Func<Element>> ();
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static readonly byte[] clientJsBytes;
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static string host = "*";
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public static string Host {
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get => host;
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set {
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if (!string.IsNullOrWhiteSpace (value) && host != value) {
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host = value;
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Restart ();
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}
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}
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}
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static int port = 8080;
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public static int Port {
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get => port;
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set {
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if (port != value) {
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port = value;
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Restart ();
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}
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}
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}
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public static void Publish (string path, Func<object> ctor)
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{
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static UI ()
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{
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var asm = typeof(UI).Assembly;
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// System.Console.WriteLine("ASM = {0}", asm);
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// foreach (var n in asm.GetManifestResourceNames()) {
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// System.Console.WriteLine(" {0}", n);
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// }
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using (var s = asm.GetManifestResourceStream ("Ooui.Client.js")) {
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using (var r = new StreamReader (s)) {
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clientJsBytes = Encoding.UTF8.GetBytes (r.ReadToEnd ());
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}
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}
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}
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public static Element GetElementAtPath (string path)
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public static void Publish (string path, Func<Element> elementCtor)
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{
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throw new System.Collections.Generic.KeyNotFoundException ($"{path} does not exist");
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Console.WriteLine ($"PUBLISH {path}");
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publishedPaths[path] = elementCtor;
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Start ();
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}
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public static 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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static void Start ()
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{
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if (serverCts != null) return;
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serverCts = new CancellationTokenSource ();
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var token = serverCts.Token;
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var listenerPrefix = $"http://{host}:{port}/";
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Task.Run (() => RunAsync (listenerPrefix, token), token);
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}
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static void Stop ()
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{
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var scts = serverCts;
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if (scts == null) return;
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serverCts = null;
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Console.ForegroundColor = ConsoleColor.Green;
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Console.WriteLine ($"Stopping...");
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Console.ResetColor ();
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scts.Cancel ();
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}
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static void Restart ()
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{
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if (serverCts == null) return;
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Stop ();
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Start ();
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}
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static async Task RunAsync (string listenerPrefix, CancellationToken token)
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{
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HttpListener listener = null;
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var started = false;
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while (!started && !token.IsCancellationRequested) {
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try {
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listener = new HttpListener ();
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listener.Prefixes.Add (listenerPrefix);
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listener.Start ();
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started = true;
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}
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catch (System.Net.Sockets.SocketException ex) when
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(ex.SocketErrorCode == System.Net.Sockets.SocketError.AddressAlreadyInUse) {
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var wait = 5;
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Console.WriteLine ($"{listenerPrefix} is in use, trying again in {wait} seconds...");
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await Task.Delay (wait * 1000);
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}
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}
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Console.ForegroundColor = ConsoleColor.Green;
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Console.WriteLine ($"Listening at {listenerPrefix}...");
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Console.ResetColor ();
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while (!token.IsCancellationRequested) {
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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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ProcessRequest (listenerContext, token);
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}
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}
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}
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static 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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var response = listenerContext.Response;
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Func<Element> ctor;
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if (path == "/client.js") {
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response.ContentLength64 = clientJsBytes.LongLength;
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response.ContentType = "application/javascript";
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response.ContentEncoding = Encoding.UTF8;
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response.AddHeader ("Cache-Control", "public, max-age=3600");
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using (var s = response.OutputStream) {
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s.Write (clientJsBytes, 0, clientJsBytes.Length);
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}
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}
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else if (publishedPaths.TryGetValue (path, out ctor)) {
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WriteElementHtml (path, response);
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}
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else {
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response.StatusCode = 404;
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response.Close ();
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}
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}
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static void WriteElementHtml (string elementPath, HttpListenerResponse response)
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{
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response.StatusCode = 200;
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response.ContentType = "text/html";
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response.ContentEncoding = Encoding.UTF8;
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var html = Encoding.UTF8.GetBytes ($@"<html>
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<head><title>{elementPath}</title></head>
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<body>
|
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<script>rootElementPath = ""{elementPath}"";</script>
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<script src=""/client.js""> </script></body>
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</html>");
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response.ContentLength64 = html.LongLength;
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using (var s = response.OutputStream) {
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s.Write (html, 0, html.Length);
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}
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response.Close ();
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}
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|
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static async void ProcessWebSocketRequest (HttpListenerContext listenerContext, CancellationToken token)
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{
|
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//
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// Find the element
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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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|
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Func<Element> ctor;
|
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if (!publishedPaths.TryGetValue (path, out ctor)) {
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listenerContext.Response.StatusCode = 404;
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listenerContext.Response.Close ();
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return;
|
||||
}
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||||
|
||||
Element element = null;
|
||||
try {
|
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element = ctor ();
|
||||
}
|
||||
catch (Exception ex) {
|
||||
listenerContext.Response.StatusCode = 500;
|
||||
listenerContext.Response.Close();
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Error ("Failed to create element", ex);
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return;
|
||||
}
|
||||
|
||||
//
|
||||
// Connect the web socket
|
||||
//
|
||||
WebSocketContext webSocketContext = null;
|
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WebSocket webSocket = null;
|
||||
try {
|
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webSocketContext = await listenerContext.AcceptWebSocketAsync(subProtocol: "ooui-1.0").ConfigureAwait (false);
|
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webSocket = webSocketContext.WebSocket;
|
||||
Console.WriteLine ("WEBSOCKET {0}", listenerContext.Request.Url.LocalPath);
|
||||
}
|
||||
catch (Exception ex) {
|
||||
listenerContext.Response.StatusCode = 500;
|
||||
listenerContext.Response.Close();
|
||||
Error ("Failed to accept WebSocket", ex);
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
//
|
||||
// Preparse handlers for the element
|
||||
//
|
||||
Action<Message> onElementMessage = async m => {
|
||||
if (webSocket == null) return;
|
||||
try {
|
||||
await SendMessageAsync (webSocket, m, token);
|
||||
}
|
||||
catch (Exception ex) {
|
||||
Error ("Failed to handled element message", ex);
|
||||
}
|
||||
};
|
||||
|
||||
//
|
||||
// Communicate!
|
||||
//
|
||||
try {
|
||||
//
|
||||
// Send message history, start sending updates, and add it to the body
|
||||
//
|
||||
foreach (var m in element.AllStateMessages) {
|
||||
if (webSocket.State == WebSocketState.Open) {
|
||||
await SendMessageAsync (webSocket, m, token);
|
||||
}
|
||||
}
|
||||
element.MessageSent += onElementMessage;
|
||||
await SendMessageAsync (webSocket, new Message {
|
||||
TargetId = "document.body",
|
||||
MessageType = MessageType.Call,
|
||||
Key = "appendChild",
|
||||
Value = new[] { element },
|
||||
}, token);
|
||||
|
||||
//
|
||||
// Listen for events
|
||||
//
|
||||
var receiveBuffer = new byte[1024];
|
||||
|
||||
while (webSocket.State == WebSocketState.Open && !token.IsCancellationRequested) {
|
||||
var receiveResult = await webSocket.ReceiveAsync(new ArraySegment<byte>(receiveBuffer), token);
|
||||
|
||||
if (receiveResult.MessageType == WebSocketMessageType.Close) {
|
||||
await webSocket.CloseAsync (WebSocketCloseStatus.NormalClosure, "", token).ConfigureAwait (false);
|
||||
}
|
||||
else if (receiveResult.MessageType == WebSocketMessageType.Binary) {
|
||||
await webSocket.CloseAsync (WebSocketCloseStatus.InvalidMessageType, "Cannot accept binary frame", token).ConfigureAwait (false);
|
||||
}
|
||||
else {
|
||||
var size = receiveResult.Count;
|
||||
while (!receiveResult.EndOfMessage) {
|
||||
if (size >= receiveBuffer.Length) {
|
||||
await webSocket.CloseAsync (WebSocketCloseStatus.MessageTooBig, "Message too big", token).ConfigureAwait (false);
|
||||
return;
|
||||
}
|
||||
receiveResult = await webSocket.ReceiveAsync (new ArraySegment<byte>(receiveBuffer, size, receiveBuffer.Length - size), token).ConfigureAwait (false);
|
||||
size += receiveResult.Count;
|
||||
}
|
||||
var receivedString = Encoding.UTF8.GetString (receiveBuffer, 0, size);
|
||||
Console.WriteLine ("RECEIVED: {0}", receivedString);
|
||||
|
||||
// var outputBuffer = new ArraySegment<byte> (Encoding.UTF8.GetBytes ($"You said: {receivedString}"));
|
||||
// await webSocket.SendAsync (outputBuffer, WebSocketMessageType.Text, true, token).ConfigureAwait (false);
|
||||
}
|
||||
}
|
||||
}
|
||||
catch (WebSocketException ex) when (ex.WebSocketErrorCode == WebSocketError.ConnectionClosedPrematurely) {
|
||||
// The remote party closed the WebSocket connection without completing the close handshake.
|
||||
}
|
||||
catch (Exception ex) {
|
||||
Error ("Failed to process web socket", ex);
|
||||
}
|
||||
finally {
|
||||
element.MessageSent -= onElementMessage;
|
||||
webSocket?.Dispose ();
|
||||
}
|
||||
}
|
||||
|
||||
static Task SendMessageAsync (WebSocket webSocket, Message message, CancellationToken token)
|
||||
{
|
||||
var json = Newtonsoft.Json.JsonConvert.SerializeObject (message);
|
||||
var outputBuffer = new ArraySegment<byte> (Encoding.UTF8.GetBytes (json));
|
||||
return webSocket.SendAsync (outputBuffer, WebSocketMessageType.Text, true, token);
|
||||
}
|
||||
|
||||
static void Error (string message, Exception ex)
|
||||
{
|
||||
Console.ForegroundColor = ConsoleColor.Red;
|
||||
Console.WriteLine ("{0}: {1}", message, ex);
|
||||
Console.ResetColor ();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -7,9 +7,6 @@ namespace Samples
|
|||
{
|
||||
static int Main (string[] args)
|
||||
{
|
||||
var server = new Server ();
|
||||
server.RunAsync ("http://*:8080/");
|
||||
|
||||
new ButtonSample ().Publish ();
|
||||
|
||||
Console.ReadLine ();
|
||||
|
|
|
|||
Loading…
Reference in New Issue