api change for weird cors v2

fbla-api/lib/fbla_api.dart

@@ -154,7 +154,6 @@ Future<String> fetchBusinessData() async {
 //set defaults
 String _hostname = 'localhost';
 const _port = 8000;
-Map<String, String> headers = {...headers, 'Access-Control-Allow-Methods': '*'};
 
 final postgres = PostgreSQLConnection(
   Platform.environment['JOBLINK_POSTGRES_ADDRESS']!,
@@ -169,13 +168,22 @@ void main() async {
 
   final app = Router();
 
+  // CORS preflight acceptor
+  app.options('/<ignored|.*>', (Request request) {
+    return Response.ok(null, headers: {
+      'Access-Control-Allow-Origin': '*',
+      'Access-Control-Allow-Methods': 'POST, GET, OPTIONS',
+      'Access-Control-Allow-Headers': 'Content-Type',
+    });
+  });
+
   // routes
   app.get('/fbla-api/hello', (Request request) async {
     print('Hello received');
 
     return Response.ok(
       'Hello, World!',
-      headers: headers,
+      headers: {'Access-Control-Allow-Origin': '*'},
     );
   });
   app.get('/fbla-api/businessdata/overview/jobs', (Request request) async {
@@ -232,7 +240,10 @@ void main() async {
 
     return Response.ok(
       json.encode(postgresResult[0][0]),
-      headers: {...headers, 'Content-Type': 'text/plain'},
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Content-Type': 'text/plain'
+      },
     );
   });
   app.get('/fbla-api/businessdata/overview/types', (Request request) async {
@@ -267,7 +278,10 @@ void main() async {
 
     return Response.ok(
       json.encode(output),
-      headers: {...headers, 'Content-Type': 'text/plain'},
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Content-Type': 'text/plain'
+      },
     );
   });
   app.get('/fbla-api/businessdata/businessnames', (Request request) async {
@@ -284,7 +298,10 @@ void main() async {
 
     return Response.ok(
       json.encode(postgresResult),
-      headers: {...headers, 'Content-Type': 'text/plain'},
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Content-Type': 'text/plain'
+      },
     );
   });
   app.get('/fbla-api/businessdata/business/<business>',
@@ -330,7 +347,10 @@ void main() async {
 
     return Response.ok(
       json.encode(result),
-      headers: {...headers, 'Content-Type': 'text/plain'},
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Content-Type': 'text/plain'
+      },
     );
   });
   app.get('/fbla-api/businessdata/businesses', (Request request) async {
@@ -339,7 +359,10 @@ void main() async {
     if (request.url.queryParameters['businesses'] == null) {
       return Response.badRequest(
         body: 'query \'businesses\' required',
-        headers: {...headers, 'Content-Type': 'text/plain'},
+        headers: {
+          'Access-Control-Allow-Origin': '*',
+          'Content-Type': 'text/plain'
+        },
       );
     }
     var filters = request.url.queryParameters['businesses']!.split(',');
@@ -369,7 +392,10 @@ void main() async {
 
     return Response.ok(
       json.encode(output),
-      headers: {...headers, 'Content-Type': 'text/plain'},
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Content-Type': 'text/plain'
+      },
     );
   });
   app.get('/fbla-api/businessdata', (Request request) async {
@@ -395,7 +421,10 @@ void main() async {
     var encoded = json.encode(result[0][0]);
     return Response.ok(
       encoded,
-      headers: {...headers, 'Content-Type': 'text/plain'},
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Content-Type': 'text/plain'
+      },
     );
   });
   app.get('/fbla-api/logos/<logo>', (Request request, String logoId) {
@@ -406,13 +435,19 @@ void main() async {
       List<int> content = logo.readAsBytesSync();
       return Response.ok(
         content,
-        headers: {...headers, 'Content-Type': 'image/png'},
+        headers: {
+          'Access-Control-Allow-Origin': '*',
+          'Content-Type': 'image/png'
+        },
       );
     } catch (e) {
       print('Error reading logo!');
       return Response.notFound(
         'logo not found',
-        headers: {...headers, 'Content-Type': 'image/png'},
+        headers: {
+          'Access-Control-Allow-Origin': '*',
+          'Content-Type': 'image/png'
+        },
       );
     }
   });
@@ -444,7 +479,7 @@ void main() async {
       }
       return Response.ok(
         id.toString(),
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     } on JWTExpiredException {
       print('JWT Expired');
@@ -454,7 +489,7 @@ void main() async {
 
     return Response.unauthorized(
       'unauthorized',
-      headers: headers,
+      headers: {'Access-Control-Allow-Origin': '*'},
     );
   });
   app.post('/fbla-api/createlisting', (Request request) async {
@@ -479,7 +514,7 @@ void main() async {
 
       return Response.ok(
         id.toString(),
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     } on JWTExpiredException {
       print('JWT Expired');
@@ -489,7 +524,7 @@ void main() async {
 
     return Response.unauthorized(
       'unauthorized',
-      headers: headers,
+      headers: {'Access-Control-Allow-Origin': '*'},
     );
   });
   app.post('/fbla-api/deletebusiness', (Request request) async {
@@ -512,7 +547,7 @@ void main() async {
 
       return Response.ok(
         id.toString(),
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     } on JWTExpiredException {
       print('JWT Expired');
@@ -522,7 +557,7 @@ void main() async {
 
     return Response.unauthorized(
       'unauthorized',
-      headers: headers,
+      headers: {'Access-Control-Allow-Origin': '*'},
     );
   });
   app.post('/fbla-api/deletelisting', (Request request) async {
@@ -539,7 +574,7 @@ void main() async {
 
       return Response.ok(
         id.toString(),
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     } on JWTExpiredException {
       print('JWT Expired');
@@ -549,7 +584,7 @@ void main() async {
 
     return Response.unauthorized(
       'unauthorized',
-      headers: headers,
+      headers: {'Access-Control-Allow-Origin': '*'},
     );
   });
   app.post('/fbla-api/editbusiness', (Request request) async {
@@ -586,7 +621,7 @@ void main() async {
 
       return Response.ok(
         business.id.toString(),
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     } on JWTExpiredException {
       print('JWT Expired');
@@ -596,7 +631,7 @@ void main() async {
 
     return Response.unauthorized(
       'unauthorized',
-      headers: headers,
+      headers: {'Access-Control-Allow-Origin': '*'},
     );
   });
   app.post('/fbla-api/editlisting', (Request request) async {
@@ -619,7 +654,7 @@ void main() async {
 
       return Response.ok(
         listing.id.toString(),
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     } on JWTExpiredException {
       print('JWT Expired');
@@ -629,7 +664,7 @@ void main() async {
 
     return Response.unauthorized(
       'unauthorized',
-      headers: headers,
+      headers: {'Access-Control-Allow-Origin': '*'},
     );
   });
   app.post('/fbla-api/signin', (Request request) async {
@@ -645,7 +680,7 @@ void main() async {
     if (saltDb.isEmpty) {
       return Response.unauthorized(
         'invalid username',
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     }
 
@@ -686,12 +721,12 @@ void main() async {
 
       return Response.ok(
         token.toString(),
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     } else {
       return Response.unauthorized(
         'invalid password',
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     }
   });
@@ -735,7 +770,7 @@ void main() async {
 
       return Response.ok(
         username,
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     } on JWTExpiredException {
       print('JWT Expired');
@@ -745,7 +780,7 @@ void main() async {
 
     return Response.unauthorized(
       'unauthorized',
-      headers: headers,
+      headers: {'Access-Control-Allow-Origin': '*'},
     );
   });
   app.post('/fbla-api/deleteuser', (Request request) async {
@@ -767,7 +802,7 @@ void main() async {
 
       return Response.ok(
         username,
-        headers: headers,
+        headers: {'Access-Control-Allow-Origin': '*'},
       );
     } on JWTExpiredException {
       print('JWT Expired');
@@ -777,7 +812,7 @@ void main() async {
 
     return Response.unauthorized(
       'unauthorized',
-      headers: headers,
+      headers: {'Access-Control-Allow-Origin': '*'},
     );
   });
   app.get('/fbla-api/marinodev', (Request request) async {
@@ -788,7 +823,10 @@ void main() async {
 
     return Response.ok(
       content,
-      headers: {...headers, 'Content-Type': 'image/svg+xml'},
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Content-Type': 'image/svg+xml'
+      },
     );
   });