feat(dart_frog): allow access of shelf.Message.context

packages/dart_frog/lib/src/request.dart

@@ -100,6 +100,9 @@ class Request {
     return _request.context['shelf.io.connection_info']! as HttpConnectionInfo;
   }
 
+  /// Shelf context that can be used by shelf middleware and shelf handlers.
+  Map<String, Object> get shelfContext => _request.context;
+
   /// The requested url relative to the current handler path.
   Uri get url => _request.url;
 

packages/dart_frog/lib/src/response.dart

@@ -110,6 +110,9 @@ class Response {
   /// The HTTP status code of the response.
   int get statusCode => _response.statusCode;
 
+  /// Shelf context that can be used by shelf middleware and shelf handlers.
+  Map<String, Object> get shelfContext => _response.context;
+
   /// The HTTP headers with case-insensitive keys.
   /// The returned map is unmodifiable.
   Map<String, String> get headers => _response.headers;

packages/dart_frog/test/src/request_test.dart

@@ -227,5 +227,32 @@ void main() {
         expect(request.json(), completion(equals(body)));
       });
     });
+
+    group('shelfContext', () {
+      test('allow access of the shelf context ', () async {
+        late Map<String, Object> contextFromShelf;
+        late Map<String, Object> contextFromFrog;
+        final server = await serve(
+          ((RequestContext context) async {
+            contextFromFrog = context.request.shelfContext;
+            return Response();
+          }).use(
+            fromShelfMiddleware((innerHandler) {
+              return (request) async {
+                contextFromShelf = request.context;
+                return innerHandler(request);
+              };
+            }),
+          ),
+          'localhost',
+          3000,
+        );
+        final client = HttpClient();
+        final request = await client.getUrl(Uri.parse('http://localhost:3000'));
+        await request.close();
+        expect(contextFromFrog, equals(contextFromShelf));
+        await server.close();
+      });
+    });
   });
 }

packages/dart_frog/test/src/response_test.dart

@@ -137,8 +137,7 @@ void main() {
                 '''The context should have the '${Response.shelfBufferOutputContextKey}' key.''',
           );
 
-          final bufferOutput =
-              response.context[Response.shelfBufferOutputContextKey];
+          final bufferOutput = response.context[Response.shelfBufferOutputContextKey];
           expect(
             bufferOutput,
             isFalse,
@@ -297,5 +296,34 @@ void main() {
         );
       });
     });
+
+    group('shelfContext', () {
+      test('allow access of the shelf context ', () async {
+        late Map<String, Object> contextFromShelf;
+        late Map<String, Object> contextFromFrog;
+        final server = await serve(
+          ((RequestContext context) async {
+            final response = Response();
+            contextFromFrog = response.shelfContext;
+            return response;
+          }).use(
+            fromShelfMiddleware((innerHandler) {
+              return (request) async {
+                final response = await innerHandler(request);
+                contextFromShelf = response.context;
+                return response;
+              };
+            }),
+          ),
+          'localhost',
+          3000,
+        );
+        final client = HttpClient();
+        final request = await client.getUrl(Uri.parse('http://localhost:3000'));
+        await request.close();
+        expect(contextFromFrog, equals(contextFromShelf));
+        await server.close();
+      });
+    });
   });
 }