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Connect WebSocket to correct Element

This commit is contained in:
Frank A. Krueger 2017-06-12 19:54:47 -07:00
parent a6e19e7923
commit 9ee271559f
3 changed files with 67 additions and 26 deletions
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2
Ooui/Client.js
View File

@ -1,6 +1,6 @@
// Create WebSocket connection. // Create WebSocket connection.
const socket = new WebSocket ("ws://localhost:8080", "ooui-1.0"); const socket = new WebSocket ("ws://localhost:8080" + rootElementPath, "ooui-1.0");
console.log("Socket created"); console.log("Socket created");

86
Ooui/Server.cs
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@ -19,10 +19,10 @@ namespace Ooui
static Server () static Server ()
{ {
var asm = typeof(Server).Assembly; var asm = typeof(Server).Assembly;
System.Console.WriteLine("ASM = {0}", asm); // System.Console.WriteLine("ASM = {0}", asm);
foreach (var n in asm.GetManifestResourceNames()) { // foreach (var n in asm.GetManifestResourceNames()) {
System.Console.WriteLine(" {0}", n); // System.Console.WriteLine(" {0}", n);
} // }
using (var s = asm.GetManifestResourceStream ("Ooui.Client.js")) { using (var s = asm.GetManifestResourceStream ("Ooui.Client.js")) {
using (var r = new StreamReader (s)) { using (var r = new StreamReader (s)) {
clientJsBytes = Encoding.UTF8.GetBytes (r.ReadToEnd ()); clientJsBytes = Encoding.UTF8.GetBytes (r.ReadToEnd ());
@ -37,10 +37,26 @@ namespace Ooui
public async Task RunAsync (string listenerPrefix, CancellationToken token) public async Task RunAsync (string listenerPrefix, CancellationToken token)
{ {
var listener = new HttpListener (); HttpListener listener = null;
var started = false;
while (!started) {
try {
listener = new HttpListener ();
listener.Prefixes.Add (listenerPrefix); listener.Prefixes.Add (listenerPrefix);
listener.Start (); listener.Start ();
started = true;
}
catch (System.Net.Sockets.SocketException ex) when
(ex.SocketErrorCode == System.Net.Sockets.SocketError.AddressAlreadyInUse) {
var wait = 5;
Console.WriteLine ($"{listenerPrefix} is in use, trying again in {wait} seconds...");
await Task.Delay (wait * 1000);
}
}
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine ($"Listening at {listenerPrefix}..."); Console.WriteLine ($"Listening at {listenerPrefix}...");
Console.ResetColor ();
while (!token.IsCancellationRequested) { while (!token.IsCancellationRequested) {
var listenerContext = await listener.GetContextAsync ().ConfigureAwait (false); var listenerContext = await listener.GetContextAsync ().ConfigureAwait (false);
@ -85,9 +101,7 @@ namespace Ooui
} }
} }
else if (publishedPaths.TryGetValue (path, out ctor)) { else if (publishedPaths.TryGetValue (path, out ctor)) {
var element = ctor (); WriteElementHtml (path, response);
RegisterElement (element);
WriteElementHtml (element, response);
} }
else { else {
response.StatusCode = 404; response.StatusCode = 404;
@ -95,18 +109,16 @@ namespace Ooui
} }
} }
void RegisterElement (Element element) void WriteElementHtml (string elementPath, HttpListenerResponse response)
{
}
void WriteElementHtml (Element element, HttpListenerResponse response)
{ {
response.StatusCode = 200; response.StatusCode = 200;
response.ContentType = "text/html"; response.ContentType = "text/html";
response.ContentEncoding = Encoding.UTF8; response.ContentEncoding = Encoding.UTF8;
var html = Encoding.UTF8.GetBytes ($@"<html> var html = Encoding.UTF8.GetBytes ($@"<html>
<head><title>{element}</title></head> <head><title>{elementPath}</title></head>
<body><script src=""/client.js""> </script></body> <body>
<script>rootElementPath = ""{elementPath}"";</script>
<script src=""/client.js""> </script></body>
</html>"); </html>");
response.ContentLength64 = html.LongLength; response.ContentLength64 = html.LongLength;
using (var s = response.OutputStream) { using (var s = response.OutputStream) {
@ -117,20 +129,40 @@ namespace Ooui
async void ProcessWebSocketRequest (HttpListenerContext listenerContext, CancellationToken token) async void ProcessWebSocketRequest (HttpListenerContext listenerContext, CancellationToken token)
{ {
var url = listenerContext.Request.Url;
var path = url.LocalPath;
Func<Element> ctor;
if (!publishedPaths.TryGetValue (path, out ctor)) {
listenerContext.Response.StatusCode = 404;
listenerContext.Response.Close ();
return;
}
Element element = null;
try {
element = ctor ();
}
catch (Exception ex) {
listenerContext.Response.StatusCode = 500;
listenerContext.Response.Close();
Error ("Failed to create element", ex);
return;
}
WebSocketContext webSocketContext = null; WebSocketContext webSocketContext = null;
try { try {
webSocketContext = await listenerContext.AcceptWebSocketAsync(subProtocol: "ooui-1.0").ConfigureAwait (false); webSocketContext = await listenerContext.AcceptWebSocketAsync(subProtocol: "ooui-1.0").ConfigureAwait (false);
Console.WriteLine ("Accepted WebSocket: {0}", webSocketContext); Console.WriteLine ("WEBSOCKET {0}", listenerContext.Request.Url.LocalPath);
} }
catch (Exception e) { catch (Exception ex) {
listenerContext.Response.StatusCode = 500; listenerContext.Response.StatusCode = 500;
listenerContext.Response.Close(); listenerContext.Response.Close();
Console.WriteLine ("Failed to accept WebSocket: {0}", e); Error ("Failed to accept WebSocket", ex);
return; return;
} }
WebSocket webSocket = null; WebSocket webSocket = null;
try { try {
webSocket = webSocketContext.WebSocket; webSocket = webSocketContext.WebSocket;
@ -163,12 +195,22 @@ namespace Ooui
} }
} }
} }
catch (Exception e) { catch (WebSocketException ex) when (ex.WebSocketErrorCode == WebSocketError.ConnectionClosedPrematurely) {
Console.WriteLine ("Exception: {0}", e); // The remote party closed the WebSocket connection without completing the close handshake.
}
catch (Exception ex) {
Error ("Failed to process web socket", ex);
} }
finally { finally {
webSocket?.Dispose(); webSocket?.Dispose ();
} }
} }
void Error (string message, Exception ex)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine ("{0}: {1}", message, ex);
Console.ResetColor ();
}
} }
} }

1
Samples/Program.cs
View File

@ -7,7 +7,6 @@ namespace Samples
{ {
static int Main (string[] args) static int Main (string[] args)
{ {
Console.WriteLine ("Hello World!");
var server = new Server (); var server = new Server ();
var button = new Button(); var button = new Button();
server.Publish ("/button", button); server.Publish ("/button", button);