make nested router slugs work

HTTP/HttpRequest.cs

@@ -76,6 +76,11 @@ public sealed class HttpRequest
     /// </summary>
     public bool IsWebsocket => Headers.TryGetValue("Upgrade", out string? connection) && connection.Equals("websocket", StringComparison.OrdinalIgnoreCase);
 
+    /// <summary>
+    /// The total declared size of the request body, in bytes.
+    /// </summary>
+    public int ContentLength => Headers.TryGetValue("Content-Length", out string? contentLengthStr) && int.TryParse(contentLengthStr, out int contentLength) ? contentLength : 0;
+
     internal HttpRequest(HttpServer server, TcpClient client, Stream stream, IPEndPoint endpoint)
     {
         Server = server;
@@ -374,6 +379,16 @@ public sealed class HttpRequest
 
         return false;
     }
+
+    /// <summary>
+    /// Reads the entire request body. Only call this once.
+    /// </summary>
+    public async Task<string> ReadBody()
+    {
+        byte[] data = new byte[ContentLength];
+        int count = await ReadBytes(data);
+        return Encoding.UTF8.GetString(data, 0, count);
+    }
 }
 
 /// <summary>

HTTP/Routing/FileEndpoint.cs

@@ -89,7 +89,11 @@ public partial class FileEndpoint : RouterBase
         {
             mime = GuessMIMEType(fileInfo.Extension);
         }
-        return !File.Exists(assetPath) ? null : (HttpResponse)new HttpContent(mime, await File.ReadAllBytesAsync(assetPath));
+
+        if (!File.Exists(assetPath))
+            return null;
+
+        return new HttpContent(mime, await File.ReadAllBytesAsync(assetPath));
     }
 
     /// <summary>

HTTP/Routing/FuncEndpoint.cs

@@ -15,7 +15,7 @@ public class FuncEndpoint : RouterBase
         Function = function;
     }
 
-    public override HttpMethod Method => HttpMethod.GET;
+    public override HttpMethod Method => HttpMethod.Any;
 
     public override int Arguments => 0;
 

HTTP/Routing/Router.cs

@@ -13,16 +13,16 @@ public class Router : RouterBase
 
     public override HttpMethod Method => HttpMethod.Any;
 
-    public override int Arguments => 1;
+    public override int Arguments => 0;
 
     protected override async Task<HttpResponse?> GetResponseInner(HttpRequest req, ArraySegment<string> path)
     {
-        string next = path[0];
+        string next = path.Count == 0 ? string.Empty : path[0];
         foreach (Route route in Routes)
         {
             if (route.Key == next || route.Key == null)
             {
-                HttpResponse? resp = await route.Router.GetResponse(req, route.Key == null ? path : path[1..]);
+                HttpResponse? resp = await route.Router.GetResponse(req, route.Key == null || path.Count == 0 ? path : path[1..]);
                 if (resp != null)
                     return resp;
             }