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Issue with Appwrite Function Execution – 500 Error in Flutter SDK
Hi all, I'm encountering an issue when calling an Appwrite function from my Flutter app. Environment:
TypeScript
Appwrite Flutter SDK: 16.1.0```
**Problem:**
I'm getting the following error in the Flutter app when calling a function:
```AppwriteException: general_unknown, Server Error (500)
#0 ClientMixin.prepareResponse (package:appwrite/src/client_mixin.dart:90:9)
#1 ClientIO.call (package:appwrite/src/client_io.dart:412:14)
<asynchronous suspension>
#2 Functions.createExecution (package:appwrite/services/functions.dart:63:17)
<asynchronous suspension>
#3 DbBackendClient.sendByteData.<anonymous closure> (package:port_db_backend_client/db/db_client_flutter.dart:307:7)
<asynchronous suspension>
#4 DbBackendClient.sendByteData (package:port_db_backend_client/db/db_client_flutter.dart:296:5)
<asynchronous suspension>
#5 PortDbBackendClient._sendData.<anonymous closure> (package:port_db_backend_client/src/port_db_backend_client_base.dart:93:39)
<asynchronous suspension>
Notes: The function execution appears successful in the Appwrite Console, and I can even see the correct response there. But from the Flutter app, it throws a general_unknown (500) error.
Question: Am I missing something in the response handling, or is this a known issue with the Flutter SDK? Any ideas on how to debug or fix this?
Thanks in advance 🙏
TL;DR
Developers encountering a 500 error when calling an Appwrite function from a Flutter app. The function execution is successful in the Appwrite Console, but the Flutter app receives a general_unknown error. This could be a response handling issue or a known problem with the Flutter SDK. To debug, check the response handling code and ensure proper error handling.My Flutter code
TypeScript
// and return the response in byte data
// execute for '/kmsgx' in backend cloud function
await _functions
.createExecution(
functionId: _functionId,
headers: {
'Content-Type': 'application/octet-stream',
},
path: '/kmsgx',
method: ExecutionMethod.pOST,
body: String.fromCharCodes(byteData),
)
.then(
(Execution execution) {
print('Function executed successfully: ${execution.responseBody}');
// if it is not UnAuthorized response then responseData with byte data
if (!execution.responseBody.contains('UnAuthorized')) {
// codeUnits will return the LIST<int> data
responseData = Uint8List.fromList(execution.responseBody.codeUnits);
}
},
).onError((error, stackTrace) {
print("error, stackTrace :: \n$error, \n $stackTrace");
});```
