问题
I started porting my Flutter app to macos Desktop. The UI started fine. However, as soon as the app makes a network call, it fails instantly with Connection failed (OS Error: Operation not permitted).
Running a one-liner:
final response = await http.get('https://jsonplaceholder.typicode.com/posts/1');
fails with:
Unhandled Exception: SocketException: Connection failed (OS Error:
Operation not permitted, errno = 1),
address = jsonplaceholder.typicode.com, port = 443
#0 IOClient.send (package:http/src/io_client.dart:33:23)
The macos build target comes from Google's sample here.
Flutter (Channel master, v1.9.8-pre.108)
回答1:
Your macOS XCode project lacks Internet permission called "Outgoing Connections (Client)".
Open your macos xcode project - [root]/macos/Runner.xcworkspace
Click "Runner" in Project navigator - general settings will show up. Select "Capabilities" from tabbar and tick option "Outgoing Connections (Client)".
Rebuild your application inside XCode and launch the project.
回答2:
Per my comment on the other answer, you should not use the Xcode capabilities UI for this. It will not correctly handle the two separate entitlement files in a Flutter project.
You need to add:
<key>com.apple.security.network.client</key>
<true/>
to macos/Runner/DebugProfile.entitlements and macos/Runner/Release.entitlements.
This is currently documented here for legacy reasons, but that will be moving to flutter.dev at some point in the future.
来源：https://stackoverflow.com/questions/57841871/flutter-http-get-fails-on-macos-build-target-connection-failed