try gitea actions for dart server

Signed-off-by: Peter Siegmund <developer@mars3142.org>

server/cinema/.dockerignore

@@ -9,3 +9,4 @@ build/
 .packages
 *.g.dart
 *.config.dart
+assets/cache

server/cinema/bin/server.dart

@@ -1,5 +1,6 @@
 import 'dart:io';
 
+import 'package:cinema/feature/middlewares/cors.dart';
 import 'package:cinema/feature/poster/data/repositories/image_loader.dart';
 import 'package:cinema/feature/poster/data/services/poster.service.dart';
 import 'package:cinema/feature/root/data/service/root.service.dart';
@@ -18,15 +19,12 @@ void main(List<String> args) async {
   router.mount("/poster", getIt<PosterService>().router.call);
   router.mount("/", getIt<RootService>().router.call);
 
-  // Configure a pipeline that logs requests.
-  final handler = Pipeline().addMiddleware(logRequests()).addHandler(router.call);
-
-  // Use any available host or container IP (usually `0.0.0.0`).
-  final ip = InternetAddress.anyIPv4;
+  /// add middlewares (Logging, CORS)
+  final handler = Pipeline().addMiddleware(logRequests()).addMiddleware(cors()).addHandler(router.call);
 
   // For running in containers, we respect the PORT environment variable.
   final port = int.parse(Platform.environment['PORT'] ?? '3000');
-  await io.serve(handler, ip, port, poweredByHeader: null).then((server) async {
+  await io.serve(handler, InternetAddress.anyIPv4, port, poweredByHeader: null).then((server) async {
     final bannerFile = File('banner.txt');
     if (await bannerFile.exists()) {
       final banner = await bannerFile.readAsString();

server/cinema/lib/feature/middlewares/cors.dart

@@ -0,0 +1,24 @@
+import 'package:shelf/shelf.dart';
+
+Middleware cors() {
+  const corsHeaders = {
+    'Access-Control-Allow-Origin': '*',
+    'Access-Control-Allow-Methods': 'GET, POST, PUT, DELETE',
+    'Access-Control-Allow-Headers': 'Origin, Content-Type',
+    'Access-Control-Max-Age': "600",
+  };
+
+  return createMiddleware(
+    requestHandler: (Request request) {
+      if (request.method == "OPTIONS") {
+        return Response.ok('', headers: corsHeaders);
+      }
+      return null;
+    },
+    responseHandler: (Response response) {
+      final headers = Map<String, String>.from(response.headers);
+      headers.addEntries(corsHeaders.entries.map((e) => MapEntry(e.key, e.value)));
+      return response.change(headers: headers);
+    },
+  );
+}