I make small app that app get data from api internet. its work but some time app lose connection with internet and I get this message error:
E/flutter ( 3931): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Connection reset by peer
E/flutter ( 3931): #0 IOClient.send (package:http/src/io_client.dart:88:7)
E/flutter ( 3931): <asynchronous suspension>
E/flutter ( 3931): #1 BaseClient._sendUnstreamed (package:http/src/base_client.dart:93:32)
E/flutter ( 3931): <asynchronous suspension>
E/flutter ( 3931): #2 _withClient (package:http/http.dart:164:12)
E/flutter ( 3931): <asynchronous suspension>
I'm use http library latest version.
SDK flutter 3.3.0 version.
Future fetchMain() async {
var response = await http.get(Uri.parse('https://************.php'));
if (response.statusCode == 200) {
final Data = json.decode(response.body).cast<Map<String, dynamic>>();
List<MainModel> ListData = Data.map<MainModel>(
(json) {
return MainModel.fromJson(json);
}).toList();
return ListData;
} else {
}
}
The connection remains disconnected from the Internet for about 3 minutes and then works again.
Anyone have idea about that problem and how I can solve it?
thank you.
Put a try-catch block in the fetchMain function and handle possible errors
Related
When app opens user should subscribe to a topic to receive any updates with notification
the problem is sometimes it subscribe successfully and sometimes it gives me error [firebase_messaging/unknown] java.io.IOException: SERVICE_NOT_AVAILABLE
#override
void initState() {
super.initState();
lifeCycleHandler();
WidgetsBinding.instance.addPostFrameCallback((timeStamp) async {
...
await ini(context);
});
}
Future<void> ini(BuildContext context) async {
...
FirebaseMessaging.instance.subscribeToTopic(topic).whenComplete(() {
debugPrint('successfully subscribed to $topic');
},).onError((error, stackTrace) {
debugPrint('an error occurred while subscribing to topic $topic \n $stackTrace \n error $error');
},);
}
The issue is sometimes it subscribes and sometimes it gives me this error
E/flutter (17003): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [firebase_messaging/unknown] java.io.IOException: SERVICE_NOT_AVAILABLE
E/flutter (17003): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:653:7)
E/flutter (17003): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:315:18)
E/flutter (17003):
E/flutter (17003): #2 MethodChannel.invokeMapMethod (package:flutter/src/services/platform_channel.dart:518:43)
E/flutter (17003):
E/flutter (17003): #3 MethodChannelFirebaseMessaging.deleteToken (package:firebase_messaging_platform_interface/src/method_channel/method_channel_messaging.dart:192:7)
E/flutter (17003):
E/flutter (17003): #4 MyMenuState.initToken (package:buffet/Screens/menu.dart:3250:5)
E/flutter (17003):
E/flutter (17003): #5 MyMenuState.ini (package:buffet/Screens/menu.dart:1682:5)
E/flutter (17003):
E/flutter (17003): #6 MyMenuState.initState. (package:buffet/Screens/menu.dart:132:7)
E/flutter (17003):
E/flutter (17003):
firebaser here
Usually, this is caused if Google Play services is not installed on the phone or it's in an extremely bad state. Make sure that Google Play services is installed.
If the issue persists, I would recommend reaching out to Firebase support as they can offer personalized help. It’ll be challenging to troubleshoot this error on a public forum without extensively discussing certain details. Best if you can provide a bug report as it's a good starting point to investigate.
I've a Flutter App Project which contains levels of permission, so, my main objective with this is allow an manager delete a user, making him not allowed anymore to login, deleting from FirebaseAuth.
I've a permission called "Deactivated" to prevent the user from logging in, but i really want to remove from FirebaseAuth too.
The only way I've found is using the Firebase Cloud Functions, so I tried to do very similar to FlutterFire Docs
When i execute using PostMan, it works perfectly, the user test is deleted as expected:
METHOD: Post
Url: https://us-central1-<DATABASE_NAME>.cloudfunctions.net/deleteUserByEmail/
Body -> Raw:
{
"userEmail": "test#gmail.com"
}
My index.js
const functions = require("firebase-functions");
const admin = require('firebase-admin');
admin.initializeApp();
exports.deleteUserByEmail = functions.https.onRequest(async (request, response) => {
try {
const userEmail = request.body.userEmail;
admin.auth().getUserByEmail(userEmail)
.then(userRecord => {
const uid = userRecord.uid
return admin.auth().deleteUser(uid)
.then(() => {
console.log("Successfully deleted user");
response.status(200).send('Delete User');
return
})
}).catch(error => {
throw new functions.https.HttpsError('invalid-argument', error.HttpsError);
});
} catch (err) {
throw new functions.https.HttpsError('invalid-argument', "Error passing arguments into");
}
})
Part of my code that calls the code Flutter code:
HttpsCallable callable =
FirebaseFunctions.instance.httpsCallable('deleteUserByEmail');
try {
final resp = await callable.call(<String, dynamic>{
"userEmail" : userModel.email,
});
} on FirebaseFunctionsException catch (e) {
debugPrint(e.toString());
}
Once i tap the button, i receive this error code:
E/flutter (20323): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [firebase_functions/internal] INTERNAL
E/flutter (20323):
E/flutter (20323): #0 StandardMethodCodec.decodeEnvelope
package:flutter/…/services/message_codecs.dart:653
E/flutter (20323): #1 MethodChannel._invokeMethod
package:flutter/…/services/platform_channel.dart:296
E/flutter (20323): <asynchronous suspension>
E/flutter (20323): #2 MethodChannelHttpsCallable.call
package:cloud_functions_platform_interface/…/method_channel/method_channel_https_callable.dart:23
E/flutter (20323): <asynchronous suspension>
E/flutter (20323): #3 HttpsCallable.call
package:cloud_functions/src/https_callable.dart:49
E/flutter (20323): <asynchronous suspension>
E/flutter (20323):
E/flutter (20323): #0 StandardMethodCodec.decodeEnvelope
package:flutter/…/services/message_codecs.dart:653
E/flutter (20323): #1 MethodChannel._invokeMethod
package:flutter/…/services/platform_channel.dart:296
E/flutter (20323): <asynchronous suspension>
E/flutter (20323): #2 MethodChannelHttpsCallable.call
package:cloud_functions_platform_interface/…/method_channel/method_channel_https_callable.dart:23
After some research I've found that some people had that problem when their code wasn't inside a tryCatch block, but mine was since ever...
I've tried to start admin.initializeApp() parsing the credentials and databaseURL even though my FlutterFire CLI is configured, but didn't work too.
I have this code below which plays a sound every time I hit a button.
AudioPlayer player = AudioPlayer();
Future<void> playSound({required String soundStr}) async {
player.setAsset(soundStr);
player.play();
}
But whenever I hit the button fast, sometimes it will show this error. How can I eliminate this error? I tried adding player.stop(); but it still the same.
E/flutter ( 4312): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(abort, Loading interrupted, null, null)
E/flutter ( 4312): #0 AudioPlayer._setPlatformActive.checkInterruption (package:just_audio/just_audio.dart:1236:7)
E/flutter ( 4312): #1 AudioPlayer._setPlatformActive.setPlatform (package:just_audio/just_audio.dart:1347:11)
E/flutter ( 4312): <asynchronous suspension>
E/flutter ( 4312):
E/flutter ( 4312): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(abort, Loading interrupted, null, null)
E/flutter ( 4312):
Edit: I tried adding await.
Future<void> playSound({required String soundStr}) async {
await player.setAsset(soundStr);
await player.play();
}
If I hit the buttons fast, it will still have error. Though it is now different.
E/flutter (21654): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Connection aborted
E/flutter (21654): #0 AudioPlayer._load (package:just_audio/just_audio.dart:843:11)
E/flutter (21654): <asynchronous suspension>
E/flutter (21654): #1 AudioPlayer.load (package:just_audio/just_audio.dart:770:14)
E/flutter (21654): <asynchronous suspension>
E/flutter (21654): #2 AudioPlayer.setAudioSource (package:just_audio/just_audio.dart:745:18)
E/flutter (21654): <asynchronous suspension>
E/flutter (21654): #3 playSound (package:super_pinoy_quiz/common/generic_methods.dart:396:3)
E/flutter (21654): <asynchronous suspension>
E/flutter (21654):
I'm using this package: just_audio: ^0.9.29
Though I tried using different package but it also encounters the same error when hitting the button fast: audioplayers: ^1.1.1
Both setAsset and play are future method, you can await for setting assets
Future<void> playSound({required String soundStr}) async {
await player.setAsset(soundStr);
await player.play();
}
everyone! I was developing e-commerce flutter app with doofinder APIs.
But I faced a thorny problem. I tried to get data from doofinder(it's just search service) API then present to screen. I added screen-shots.
Future<List<Product>> fetchProduct(query) async {
var response = await http.get(
Uri.parse(
'https://eu1-search.doofinder.com/5/search?hashid=30a5f&query=$query'),
// Send authorization headers to the backend.
headers: {'Authorization': 'c59dadc5d822ca2b134f170'},
);
if (response.statusCode == 200) {
// If the server did return a 200 OK response,
// then parse the JSON.
print(jsonDecode(response.body)['results'].toList().runtimeType);
return jsonDecode(response.body)['results'].toList().cast<List<Product>>();
} else {
// If the server did not return a 200 OK response,
// then throw an exception.
throw Exception('Failed to load album');
}
}
then,
onChanged: (_) => EasyDebounce.debounce(
'tFMemberController',
const Duration(milliseconds: 800),
() {
isSearchStarted =
textController!.text.isNotEmpty &&
textController!.text.trim().length > 0;
print('isSearchStarted $isSearchStarted');
if (isSearchStarted) {
print('${textController!.text.trim()}');
searchedProducts =
fetchProduct(textController!.text)
as List<Product>;
print(searchedProducts);
}
setState(() {});
},
),
And this is error log.
E/flutter ( 5295): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: type 'Future<List<Product>>' is not a subtype of type 'List<Product>' in type cast
E/flutter ( 5295): #0 _SearchPageState.build.<anonymous closure>.<anonymous closure> (package:s4s_mobileapp/search/page_search.dart:151:41)
E/flutter ( 5295): #1 EasyDebounce.debounce.<anonymous closure> (package:easy_debounce/easy_debounce.dart:44:22)
E/flutter ( 5295): #2 Timer._createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:18:15)
E/flutter ( 5295): #3 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398:19)
E/flutter ( 5295): #4 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429:5)
E/flutter ( 5295): #5 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12)
E/flutter ( 5295):
I/flutter ( 5295): List<dynamic>
E/flutter ( 5295): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: type 'CastList<dynamic, List<Product>>' is not a subtype of type 'FutureOr<List<Product>>'
E/flutter ( 5295): #0 fetchProduct (package:s4s_mobileapp/search/page_search.dart:41:58)
E/flutter ( 5295): <asynchronous suspension>
E/flutter ( 5295):
This makes me crazy.
I want you to take a closer look at the pictures below and find a suitable solution please.
Change
jsonDecode(response.body)['results'].toList().cast<List<Product>>();
to this:
jsonDecode(response.body)['results'].toList().cast<Product>();
The cast method already knows that you are working with lists and only wants to know the type of the elements, but not the type of the list itself.
EDIT: You also need to change:
searchedProducts = fetchProduct(textController!.text) as List<Product>;
to this:
searchedProducts = fetchProduct(textController!.text) as Future<List<Product>>;
You have to work with futures as your result is processed asynchronously. In the widget tree you have to use FutureBuilder which takes a future and builds your list as you want.
I'm using Dio in my app and I want it to save cookies. It turns out I have to download three additional packages to do that: cookie_jar, dio_cookie_manager and path_provider.
I need to:
get application document directory:
Directory docDir = await getApplicationDocumentsDirectory();
pass it to PersistCookieJar
PersistCookieJar(storage: FileStorage(appDocDir.path + '/.cookies/'));
and add it to interceptors:
dio.interceptors.add(CookieManager(_cookieJar));
My problem is with the first part. For some reason, getApplicationDocumentsDirectory(); throws an error when not used inside a StatefulWidget widget.
I have two questions:
Why on earth would getting a path require a StatefulWidget?
How can I do what I want? I need to initialize Dio as early as possible so that by the time the UI loads, the user is already (or almost) logged in. Plus, I don't want to put the logic of initiating the client object inside the UI code, that might for example cause it to be initiated multiple times whenever the widget is created.
What my code looks like right now:
Future<void> initStuff() async {
initLocator();
Directory docDir = await getApplicationDocumentsDirectory(); // throws
print('docDir = ${docDir.path}');
Client cli = Client(docDir);
locator.registerSingleton<Client>(cli);
// ...
}
void main() async {
await initStuff();
runApp(MyApp());
}
Client constructor:
Client(Directory appDocDir) {
final _cookieJar = PersistCookieJar(storage: FileStorage(appDocDir.path + '/.cookies/'));
dio = Dio()
..options.baseUrl = Utils.SERVER_ADDRESS
..options.sendTimeout = 5000
..options.receiveTimeout = 5000
..options.connectTimeout = 5000
..interceptors.add(CookieManager(_cookieJar));
}
The error I'm getting:
E/flutter (24953): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: Null check operator used on a null value
E/flutter (24953): #0 MethodChannel.binaryMessenger
package:flutter/…/services/platform_channel.dart:142
E/flutter (24953): #1 MethodChannel._invokeMethod
package:flutter/…/services/platform_channel.dart:148
E/flutter (24953): #2 MethodChannel.invokeMethod
package:flutter/…/services/platform_channel.dart:331
E/flutter (24953): #3 MethodChannelPathProvider.getApplicationDocumentsPath
package:path_provider_platform_interface/src/method_channel_path_provider.dart:50
E/flutter (24953): #4 getApplicationDocumentsDirectory
package:path_provider/path_provider.dart:138
E/flutter (24953): #5 initStuff
package:proj/main.dart:20
E/flutter (24953): #6 main
package:proj/main.dart:63
E/flutter (24953): #7 _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:142:25)
E/flutter (24953): #8 _rootRun (dart:async/zone.dart:1354:13)
E/flutter (24953): #9 _CustomZone.run (dart:async/zone.dart:1258:19)
E/flutter (24953): #10 _runZoned (dart:async/zone.dart:1789:10)
E/flutter (24953): #11 runZonedGuarded (dart:async/zone.dart:1777:12)
E/flutter (24953): #12 _runMainZoned.<anonymous closure> (dart:ui/hooks.dart:138:5)
E/flutter (24953): #13 _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:283:19)
E/flutter (24953): #14 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:184:12)
OK: Thank you for updating your post.
The error is: Unhandled Exception: Null check operator used on a null value
It's coming from the 3rd party library call getApplicationDocumentsDirectory(), and it's occurring because you're calling a (currently uninitialized) value with null-safety enabled (a Good Thing!).
SUGGESTIONS:
Using a StatefulWidget is a bit more work - but it makes sense here. It also happens to resolve the problem for you, correct?
You might try making docDir nullable (e.g. String? path). This is exactly what the getApplicationDocument page shows:
https://pub.dev/documentation/path_provider/latest/path_provider/getApplicationDocumentsDirectory.html
Future<Directory> getApplicationDocumentsDirectory() async {
final String? path = await _platform.getApplicationDocumentsPath();
if (path == null) {
throw MissingPlatformDirectoryException(
'Unable to get application documents directory');
}
return Directory(path);
}
Finally, check out these links:
https://stackoverflow.com/a/67990442/421195
https://stackoverflow.com/a/68876902/421195
Run this in main() before everything else:
WidgetsFlutterBinding.ensureInitialized();