add synchronous variant of FuncEndpointDelegate

HTTP/MIMEType.cs

@@ -1,8 +1,12 @@
-namespace Uwaa.HTTP;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Uwaa.HTTP;
 
 /// <summary>
 /// Represents a Multipurpose Internet Mail Extensions type, which indicates the nature and format of a document/file/chunk of data.
 /// </summary>
+[JsonConverter(typeof(MIMETypeConverter))]
 public readonly record struct MIMEType
 {
     public static explicit operator string(MIMEType type) => type.ToString();
@@ -73,3 +77,22 @@ public readonly record struct MIMEType
     /// </summary>
     public override readonly string ToString() => $"{Type ?? "*"}/{Subtype ?? "*"}";
 }
+
+class MIMETypeConverter : JsonConverter<MIMEType>
+{
+    public sealed override bool CanConvert(Type typeToConvert) => typeToConvert == typeof(MIMEType);
+
+    public override MIMEType Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    {
+        string? str = reader.GetString();
+        if (str == null)
+            throw new JsonException("Cannot read MIME type");
+
+        return new MIMEType(str);
+    }
+
+    public override void Write(Utf8JsonWriter writer, MIMEType status, JsonSerializerOptions options)
+    {
+        writer.WriteStringValue(status.ToString());
+    }
+}

HTTP/Routing/FuncEndpoint.cs

@@ -2,13 +2,15 @@
 
 namespace Uwaa.HTTP.Routing;
 
-public delegate Task<HttpResponse?> FuncEndpointDelegate(HttpRequest req);
+public delegate Task<HttpResponse?> FuncEndpointDelegateAsync(HttpRequest req);
+
+public delegate HttpResponse? FuncEndpointDelegate(HttpRequest req);
 
 public class FuncEndpoint : RouterBase
 {
-    public FuncEndpointDelegate Function;
+    public FuncEndpointDelegateAsync Function;
 
-    public FuncEndpoint(FuncEndpointDelegate function)
+    public FuncEndpoint(FuncEndpointDelegateAsync function)
     {
         Function = function;
     }

HTTP/Routing/Router.cs

@@ -43,7 +43,17 @@ public class Router : RouterBase
     /// <summary>
     /// Adds an endpoint to the router on the given sub path.
     /// </summary>
-    public void Add(string? key, FuncEndpointDelegate func) => Routes.Add(new Route(key, new FuncEndpoint(func)));
+    public void Add(string? key, FuncEndpointDelegateAsync func) => Routes.Add(new Route(key, new FuncEndpoint(func)));
+
+    /// <summary>
+    /// Adds a wildcard endpoint to the router.
+    /// </summary>
+    public void Add(FuncEndpointDelegateAsync func) => Add(null, func);
+
+    /// <summary>
+    /// Adds an endpoint to the router on the given sub path.
+    /// </summary>
+    public void Add(string? key, FuncEndpointDelegate func) => Add(key, req => Task.FromResult(func(req)));
 
     /// <summary>
     /// Adds a wildcard endpoint to the router.