638 lines
22 KiB
C#
638 lines
22 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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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.Runtime.InteropServices;
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using System.Text.RegularExpressions;
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using Tesses.WebServer;
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namespace Ooui
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{
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public class UI : Server
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{
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public bool Verbose {get;set;}=true;
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private async Task HandleAsync(ServerContext ctx)
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{
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string upgrade;
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if(ctx.RequestHeaders.TryGetFirst("Upgrade",out upgrade) && upgrade == "websocket")
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{
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ProcessWebSocketRequest (ctx, CancellationToken.None);
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}
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else
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{
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ProcessRequest(ctx,CancellationToken.None);
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}
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await Task.FromResult(0);
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}
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public override async Task GetAsync(ServerContext ctx)
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{
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await HandleAsync(ctx);
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}
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public override async Task OptionsAsync(ServerContext ctx)
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{
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await HandleAsync(ctx);
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}
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public override async Task PostAsync(ServerContext ctx)
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{
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await HandleAsync(ctx);
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}
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public override async Task OtherAsync(ServerContext ctx)
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{
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await HandleAsync(ctx);
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}
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public const int MaxFps = 30;
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static readonly ManualResetEvent started = new ManualResetEvent (false);
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//static CancellationTokenSource serverCts;
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static readonly Dictionary<string, PublishedPath> publishedPaths =
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new Dictionary<string, PublishedPath> ();
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static readonly byte[] clientJsBytes;
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static readonly string clientJsEtag;
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public static byte[] ClientJsBytes => clientJsBytes;
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public static string ClientJsEtag => clientJsEtag;
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public static string HeadHtml { get; set; } = @"<link rel=""stylesheet"" href=""https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.7/css/bootstrap.min.css"" />";
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public static string BodyHeaderHtml { get; set; } = @"";
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public static string BodyFooterHtml { get; set; } = @"";
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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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if (s == null)
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throw new Exception ("Missing 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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clientJsEtag = "\"" + Utilities.GetShaHash (clientJsBytes) + "\"";
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}
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class PublishedPath
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{
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public string Path { get; }
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public Regex RegexPath { get; }
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public RequestHandler Handler { get; }
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public PublishedPath (string path, RequestHandler handler)
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{
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Path = path;
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RegexPath = new Regex ("^" + path + "$");
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Handler = handler;
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}
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}
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void Publish (string path, RequestHandler handler)
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{
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//Console.WriteLine ($"PUBLISH {path} {handler}");
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lock (publishedPaths) publishedPaths[path] = new PublishedPath (path, handler);
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}
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public void Publish (string path, Func<UIContext, Element> elementCtor, bool disposeElementWhenDone = true)
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{
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Publish (path, new ElementHandler (elementCtor, disposeElementWhenDone));
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}
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public void Publish (string path, Func<Element> elementCtor, bool disposeElementWhenDone = true)
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{
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Publish (path, new ElementHandler (_ => elementCtor (), disposeElementWhenDone));
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}
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public void Publish (string path, Element element, bool disposeElementWhenDone = true)
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{
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Publish (path, () => element, disposeElementWhenDone);
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}
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public void PublishFile (string filePath)
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{
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var path = "/" + System.IO.Path.GetFileName (filePath);
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PublishFile (path, filePath);
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}
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public void PublishFile (string path, string filePath, string contentType = null)
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{
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var data = System.IO.File.ReadAllBytes (filePath);
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if (contentType == null) {
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contentType = GuessContentType (path, filePath);
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}
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var etag = "\"" + Utilities.GetShaHash (data) + "\"";
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Publish (path, new DataHandler (data, etag, contentType));
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}
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public void PublishFile (string path, byte[] data, string contentType)
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{
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var etag = "\"" + Utilities.GetShaHash (data) + "\"";
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Publish (path, new DataHandler (data, etag, contentType));
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}
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public void PublishFile (string path, byte[] data, string etag, string contentType)
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{
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Publish (path, new DataHandler (data, etag, contentType));
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}
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public bool TryGetFileContentAtPath (string path, out FileContent file)
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{
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PublishedPath pp;
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lock (publishedPaths) {
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if (!publishedPaths.TryGetValue (path, out pp)) {
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file = null;
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return false;
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}
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}
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if (pp.Handler is DataHandler dh) {
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file = new FileContent {
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Etag = dh.Etag,
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Content = dh.Data,
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ContentType = dh.ContentType,
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};
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return true;
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}
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file = null;
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return false;
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}
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public class FileContent
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{
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public string ContentType { get; set; }
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public string Etag { get; set; }
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public byte[] Content { get; set; }
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}
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public void PublishJson (string path, Func<object> ctor)
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{
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Publish (path, new JsonHandler (_ => ctor ()));
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}
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public void PublishJson (string path, Func<UIContext, object> ctor)
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{
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Publish (path, new JsonHandler (ctor));
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}
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public void PublishJson (string path, object value)
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{
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var data = JsonHandler.GetData (value);
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var etag = "\"" + Utilities.GetShaHash (data) + "\"";
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Publish (path, new DataHandler (data, etag, JsonHandler.ContentType));
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}
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public void PublishCustomResponse (string path, Action<ServerContext, CancellationToken> responder)
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{
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Publish (path, new CustomHandler (responder));
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}
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static string GuessContentType (string path, string filePath)
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{
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return null;
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}
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// public static void WaitUntilStarted () => started.WaitOne ();
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void ProcessRequest (ServerContext listenerContext, CancellationToken token)
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{
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var path = listenerContext.UrlPath;
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if(this.Verbose)
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Console.WriteLine ($"{listenerContext.Method} {path}");
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if (path == "/ooui.js") {
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string inm="";
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listenerContext.RequestHeaders.TryGetFirst ("If-None-Match",out inm);
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if ( string.IsNullOrEmpty (inm) || inm != clientJsEtag) {
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listenerContext.StatusCode = 200;
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listenerContext.ResponseHeaders.Add ("Cache-Control", "public, max-age=60");
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listenerContext.ResponseHeaders.Add ("Etag", clientJsEtag);
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listenerContext.SendBytes(clientJsBytes,"appllication/json");
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}
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else {
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listenerContext.StatusCode=304;
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listenerContext.WriteHeaders();
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listenerContext.NetworkStream.Close();
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}
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}
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else {
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var found = false;
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PublishedPath pp;
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var variables = new Dictionary<string, string> ();
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lock (publishedPaths) found = publishedPaths.TryGetValue (path, out pp);
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if (!found) {
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// Try regex
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List<PublishedPath> pps;
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lock (publishedPaths) pps = publishedPaths.Values.ToList();
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foreach (var p in pps) {
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var m = p.RegexPath.Match (path);
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if (m.Success) {
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pp = p;
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found = true;
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for (var ig = 1; ig < m.Groups.Count; ig++) {
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variables[p.RegexPath.GroupNameFromNumber(ig)] = m.Groups[ig].Value;
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}
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break;
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}
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}
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}
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if (found) {
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try {
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var context = UIContext.ForListenerContext (listenerContext, variables);
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pp.Handler.Respond (listenerContext, context, token);
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}
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catch (Exception ex) {
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Error ("Handler failed to respond", ex);
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try {
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listenerContext.StatusCode = 500;
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listenerContext.WriteHeaders();
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listenerContext.NetworkStream.Close ();
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}
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catch {
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// Ignore ending the response errors
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}
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}
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}
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else {
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listenerContext.StatusCode = 500;
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listenerContext.WriteHeaders();
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listenerContext.NetworkStream.Close ();
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}
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}
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}
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abstract class RequestHandler
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{
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public abstract void Respond (ServerContext listenerContext, UIContext context, CancellationToken token);
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}
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class ElementHandler : RequestHandler
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{
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readonly Func<UIContext, Element> ctor;
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public bool DisposeElementWhenDone { get; }
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public ElementHandler (Func<UIContext, Element> ctor, bool disposeElementWhenDone)
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{
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this.ctor = ctor;
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DisposeElementWhenDone = disposeElementWhenDone;
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}
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public Element GetElement (UIContext context) => ctor (context);
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public override void Respond (ServerContext listenerContext, UIContext context, CancellationToken token)
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{
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var path = listenerContext.UrlPath;
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listenerContext.StatusCode = 200;
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listenerContext.SendText(RenderTemplate (path));
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}
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}
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public static string RenderTemplate (string webSocketPath, string title = "", string initialHtml = "")
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{
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using (var w = new System.IO.StringWriter ()) {
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RenderTemplate (w, webSocketPath, title, initialHtml);
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return w.ToString ();
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}
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}
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static string EscapeHtml (string text)
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{
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return text.Replace ("&", "&").Replace ("<", "<");
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}
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public static void RenderTemplate (TextWriter writer, string webSocketPath, string title, string initialHtml)
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{
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writer.Write (@"<!DOCTYPE html>
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<html>
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<head>
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<title>");
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writer.Write (EscapeHtml (title));
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writer.Write (@"</title>
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<meta name=""viewport"" content=""width=device-width, initial-scale=1"" />
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");
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writer.WriteLine (HeadHtml);
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writer.WriteLine (@" <style>");
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writer.WriteLine (rules.ToString ());
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writer.WriteLine (@" </style>
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</head>
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<body>");
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writer.WriteLine (BodyHeaderHtml);
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writer.WriteLine (@"<div id=""ooui-body"" class=""container-fluid"" style=""padding:0;margin:0"">");
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writer.WriteLine (initialHtml);
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writer.Write (@"</div>
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<script src=""/ooui.js""></script>
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<script>ooui(""");
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writer.Write (webSocketPath);
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writer.WriteLine (@""");</script>");
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writer.WriteLine (BodyFooterHtml);
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writer.WriteLine (@"</body>
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</html>");
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}
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class DataHandler : RequestHandler
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{
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readonly byte[] data;
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readonly string etag;
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readonly string contentType;
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public byte[] Data => data;
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public string Etag => etag;
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public string ContentType => contentType;
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public DataHandler (byte[] data, string etag, string contentType = null)
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{
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this.data = data;
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this.etag = etag;
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this.contentType = contentType;
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}
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public override void Respond (ServerContext listenerContext, UIContext context, CancellationToken token)
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{
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var url = listenerContext.UrlPath;
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string inm="";
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if (listenerContext.RequestHeaders.TryGetFirst("If-None-Match",out inm) && !string.IsNullOrEmpty (inm) && inm == etag) {
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listenerContext.StatusCode = 304;
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listenerContext.WriteHeaders();
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listenerContext.NetworkStream.Close();
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}
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else {
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string content_type = "application/octet-stream";
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listenerContext.StatusCode = 200;
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listenerContext.ResponseHeaders.Add ("Etag", etag);
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if (!string.IsNullOrEmpty (contentType))
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content_type= contentType;
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listenerContext.SendBytes(data,content_type);
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}
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}
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}
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class JsonHandler : RequestHandler
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{
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public const string ContentType = "application/json; charset=utf-8";
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readonly Func<UIContext, object> ctor;
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public JsonHandler (Func<UIContext, object> ctor)
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{
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this.ctor = ctor;
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}
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public static byte[] GetData (object obj)
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{
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var r = Ooui.JsonConvert.SerializeObject (obj);
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var e = new UTF8Encoding (false);
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return e.GetBytes (r);
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}
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public override void Respond (ServerContext listenerContext, UIContext context, CancellationToken token)
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{
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var data = GetData (ctor (context));
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listenerContext.StatusCode = 200;
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listenerContext.SendBytes(data,ContentType);
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}
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}
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class CustomHandler : RequestHandler
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{
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readonly Action<ServerContext, CancellationToken> responder;
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public CustomHandler (Action<ServerContext, CancellationToken> responder)
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{
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this.responder = responder;
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}
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public override void Respond (ServerContext listenerContext, UIContext context, CancellationToken token)
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{
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responder (listenerContext, token);
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}
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}
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void ProcessWebSocketRequest (ServerContext listenerContext, CancellationToken serverToken)
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{
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//
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// Find the element
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//
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var path = listenerContext.UrlPath;
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PublishedPath pp;
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var found = false;
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var variables = new Dictionary<string, string> ();
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lock (publishedPaths) found = publishedPaths.TryGetValue (path, out pp);
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if (!found) {
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List<PublishedPath> pps;
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lock (publishedPaths) pps = publishedPaths.Values.ToList ();
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foreach (var p in pps) {
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var m = p.RegexPath.Match (path);
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if (m.Success) {
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pp = p;
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found = true;
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for (var ig = 1; ig < m.Groups.Count; ig++) {
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variables[p.RegexPath.GroupNameFromNumber (ig)] = m.Groups[ig].Value;
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}
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break;
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}
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}
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}
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var elementHandler = pp?.Handler as ElementHandler;
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if (!found || elementHandler == null) {
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listenerContext.StatusCode = 404;
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listenerContext.WriteHeaders();
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listenerContext.NetworkStream.Close();
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return;
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}
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Element element = null;
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bool disposeElementWhenDone = true;
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try {
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var context = UIContext.ForListenerContext (listenerContext, variables);
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element = elementHandler.GetElement (context);
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disposeElementWhenDone = elementHandler.DisposeElementWhenDone;
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if (element == null)
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throw new Exception ("Handler returned a null element");
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}
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catch (Exception ex) {
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listenerContext.StatusCode = 500;
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listenerContext.WriteHeaders();
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listenerContext.NetworkStream.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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//listenerContext.RequestHeaders.Add("Sec-WebSocket-Protocol","ooui");
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//
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// Set the element's dimensions
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//
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var query = listenerContext.QueryParams;
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if (!query.TryGetFirst ("w", out var wValue) || string.IsNullOrEmpty (wValue)) {
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wValue = "640";
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}
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if (!query.TryGetFirst ("h", out var hValue) || string.IsNullOrEmpty (hValue)) {
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hValue = "480";
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}
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var icult = System.Globalization.CultureInfo.InvariantCulture;
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if (!double.TryParse (wValue, System.Globalization.NumberStyles.Any, icult, out var w))
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w = 640;
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if (!double.TryParse (hValue, System.Globalization.NumberStyles.Any, icult, out var h))
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h = 480;
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//
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// Create a new session and let it handle everything from here
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//
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try {
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var session = new WebSocketSession (this,element, disposeElementWhenDone, w, h, Error, serverToken);
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listenerContext.StartWebSocketConnection(session.Opened,
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session.Arrived,
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session.Closed); }
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catch (Exception ex) {
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Error ("Web socket failed", ex);
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}
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}
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void Error (string message, Exception ex)
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{
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if(!Verbose) return;
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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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static readonly Dictionary<string, Style> styles =
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new Dictionary<string, Style> ();
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static readonly StyleSelectors rules = new StyleSelectors ();
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public static StyleSelectors Styles => rules;
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public class StyleSelectors
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{
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public Style this[string selector] {
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get {
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var key = selector ?? "";
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lock (styles) {
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if (!styles.TryGetValue (key, out Style r)) {
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r = new Style ();
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styles.Add (key, r);
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}
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return r;
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}
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}
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set {
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var key = selector ?? "";
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lock (styles) {
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if (value == null) {
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styles.Remove (key);
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}
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else {
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styles[key] = value;
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}
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}
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}
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}
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public void Clear ()
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{
|
|
lock (styles) {
|
|
styles.Clear ();
|
|
}
|
|
}
|
|
|
|
public override string ToString()
|
|
{
|
|
lock (styles) {
|
|
var q =
|
|
from s in styles
|
|
let v = s.Value.ToString ()
|
|
where v.Length > 0
|
|
select s.Key + " {" + s.Value.ToString () + "}";
|
|
return String.Join ("\n", q);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public class UIContext
|
|
{
|
|
readonly Dictionary<string, string> variables = new Dictionary<string, string> ();
|
|
|
|
public string RequestUrl { get; }
|
|
|
|
public string this[string key] => variables.TryGetValue (key, out var v) ? v : "";
|
|
|
|
public UIContext (string requestUrl)
|
|
{
|
|
RequestUrl = requestUrl ?? throw new ArgumentNullException (nameof (requestUrl));
|
|
}
|
|
|
|
public static UIContext ForListenerContext (ServerContext listenerContext, Dictionary<string, string> variables)
|
|
{
|
|
var c = new UIContext (listenerContext.UrlPath);
|
|
foreach (var kv in variables) {
|
|
c.variables.Add (kv.Key, kv.Value);
|
|
}
|
|
return c;
|
|
}
|
|
|
|
public static UIContext ForWebAssemblySession (string sessionId, string elementPath)
|
|
{
|
|
throw new NotSupportedException("Not supported on this fork");
|
|
}
|
|
}
|
|
}
|