feat: add standard client headers

Author: grdsdev

packages/supabase/lib/src/constants.dart

@@ -1,7 +1,18 @@
 import 'package:supabase/src/version.dart';
+import 'dart:io' show Platform;
 
 class Constants {
-  static const Map<String, String> defaultHeaders = {
+  static String get platform {
+    return Platform.operatingSystem;
+  }
+
+  static String get platformVersion {
+    return Platform.operatingSystemVersion;
+  }
+
+  static final Map<String, String> defaultHeaders = {
     'X-Client-Info': 'supabase-dart/$version',
+    'X-Supabase-Client-Platform': platform,
+    'X-Supabase-Client-Platform-Version': platformVersion,
   };
 }

packages/supabase/test/client_test.dart

@@ -35,6 +35,51 @@ void main() {
       await supabase.dispose();
     });
 
+    test('X-Supabase-Client-Platform header is set properly', () {
+      expect(supabase.headers['X-Supabase-Client-Platform'],
+          Platform.operatingSystem);
+      expect(supabase.headers['X-Supabase-Client-Platform-Version'],
+          Platform.operatingSystemVersion);
+    });
+    test('X-Supabase-Client-Platform header is set properly on auth', () {
+      expect(supabase.auth.headers['X-Supabase-Client-Platform'],
+          Platform.operatingSystem);
+      expect(supabase.auth.headers['X-Supabase-Client-Platform-Version'],
+          Platform.operatingSystemVersion);
+    });
+
+    test('X-Supabase-Client-Platform header is set properly on storage', () {
+      expect(supabase.storage.headers['X-Supabase-Client-Platform'],
+          Platform.operatingSystem);
+      expect(supabase.storage.headers['X-Supabase-Client-Platform-Version'],
+          Platform.operatingSystemVersion);
+    });
+
+    test('X-Supabase-Client-Platform header is set properly on functions', () {
+      expect(supabase.functions.headers['X-Supabase-Client-Platform'],
+          Platform.operatingSystem);
+      expect(supabase.functions.headers['X-Supabase-Client-Platform-Version'],
+          Platform.operatingSystemVersion);
+    });
+
+    test('X-Supabase-Client-Platform header is set properly on rest', () {
+      expect(supabase.rest.headers['X-Supabase-Client-Platform'],
+          Platform.operatingSystem);
+      expect(supabase.rest.headers['X-Supabase-Client-Platform-Version'],
+          Platform.operatingSystemVersion);
+    });
+
+    test('X-Supabase-Client-Platform header is set properly on realtime',
+        () async {
+      final request = await getRealtimeRequest(
+        server: mockServer,
+        supabaseClient: supabase,
+      );
+      expect(request.headers['X-Supabase-Client-Platform']?.first,
+          Platform.operatingSystem);
+      expect(request.headers['X-Supabase-Client-Platform-Version']?.first,
+          Platform.operatingSystemVersion);
+    });
     test('X-Client-Info header is set properly on realtime', () async {
       final request = await getRealtimeRequest(
         server: mockServer,