feat(http): [WIP] implements middleware system

2022-06-23 17:07:04 +02:00
parent ea4a30ca00
commit 58d3b70bee
12 changed files with 820 additions and 0 deletions
@@ -0,0 +1,149 @@
+// ignore_for_file: public_member_api_docs, sort_constructors_first
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:wyatt_http_client/src/middleware_client.dart';
+import 'package:wyatt_http_client/src/middlewares/body_to_json_middleware.dart';
+import 'package:wyatt_http_client/src/middlewares/refresh_token_middleware.dart';
+import 'package:wyatt_http_client/src/middlewares/simple_logger_middleware.dart';
+import 'package:wyatt_http_client/src/middlewares/uri_prefix_middleware.dart';
+import 'package:wyatt_http_client/src/pipeline.dart';
+import 'package:wyatt_http_client/src/utils/protocols.dart';
+
+// class RequestMutatorMiddleware implements Middleware {
+//   @override
+//   Middleware? parent;
+
+//   @override
+//   Middleware? child;
+
+//   RequestMutatorMiddleware({
+//     this.parent,
+//     this.child,
+//   });
+
+//   @override
+//   BaseRequest onRequest(BaseRequest request) {
+//     print('RequestMutator::OnRequest: ${request.method} -> ${request.url}');
+//     return child?.onRequest(request) ?? request;
+//   }
+
+//   @override
+//   BaseResponse onResponse(BaseResponse response) {
+//     final res = child?.onResponse(response) ?? response;
+//     print(
+//       'RequestMutator::OnResponse: ${res.statusCode} -> ${res.contentLength} bytes',
+//     );
+//     return res;
+//   }
+// }
+
+// typedef Middleware = Handler Function(Handler innerHandler);
+
+// Middleware createMiddleware({
+//   FutureOr<Response?> Function(Request)? requestHandler,
+//   FutureOr<Response> Function(Response)? responseHandler,
+//   FutureOr<Response> Function(Object error, StackTrace)? errorHandler,
+// }) {
+//   requestHandler ??= (request) => null;
+//   responseHandler ??= (response) => response;
+
+//   FutureOr<Response> Function(Object, StackTrace)? onError;
+//   if (errorHandler != null) {
+//     onError = (error, stackTrace) {
+//       if (error is Exception) throw error;
+//       return errorHandler(error, stackTrace);
+//     };
+//   }
+
+//   return (Handler innerHandler) {
+//     return (request) {
+//       return Future.sync(() => requestHandler!(request)).then((response) {
+//         if (response != null) return response;
+
+//         return Future.sync(() => innerHandler(request))
+//             .then((response) => responseHandler!(response), onError: onError);
+//       });
+//     };
+//   };
+// }
+
+// extension MiddlewareX on Middleware {
+//   Middleware addMiddleware(Middleware other) =>
+//       (Handler handler) => this(other(handler));
+//   Handler addHandler(Handler handler) => this(handler);
+// }
+
+// typedef Handler = FutureOr<Response> Function(Request request);
+
+// final headerMutator = createMiddleware(
+//   responseHandler: (response) {
+//     print(response.headers);
+//     return response;
+//   },);
+
+// class Pipeline {
+//   const Pipeline();
+
+//   Pipeline addMiddleware(Middleware middleware) =>
+//       _Pipeline(middleware, addHandler);
+
+//   Handler addHandler(Handler handler) => handler;
+
+//   Middleware get middleware => addHandler;
+// }
+
+// class _Pipeline extends Pipeline {
+//   final Middleware _middleware;
+//   final Middleware _parent;
+
+//   _Pipeline(this._middleware, this._parent);
+
+//   @override
+//   Handler addHandler(Handler handler) => _parent(_middleware(handler));
+// }
+
+Future<void> main(List<String> args) async {
+  final Pipeline pipeline1 = Pipeline()
+      .addMiddleware(SimpleLoggerMiddleware())
+      .addMiddleware(
+        UriPrefixMiddleware(
+          protocol: Protocols.http,
+          authority: 'localhost:80',
+        ),
+      )
+      .addMiddleware(BodyToJsonMiddleware());
+
+  final Pipeline pipeline2 = Pipeline().addMiddleware(
+    RefreshTokenMiddleware(
+      authorizationEndpoint:
+          'http://localhost:80/api/v1/account/test?action=authorize',
+      tokenEndpoint: 'http://localhost:80/api/v1/account/test?action=refresh',
+      innerClientMiddlewares: pipeline1.middleware,
+    ),
+  );
+
+  final Pipeline pipeline = pipeline1 + pipeline2;
+
+  print(pipeline.getLogic());
+  final client = MiddlewareClient(pipeline);
+  final r = await client.post(
+    Uri.parse('/api/v1/account/test'),
+    body: <String, String>{
+      'email': 'test@test.fr',
+    },
+  );
+}