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0

I'm not able to understand how to check the status of a IOWebSocketChannel before adding a message to the sink or how to be notified for errors in case message is not sent.

Supposing web socket server is not listening on localhost:8080, how to check for channel.sink.add errors or to capture exceptions about failed socket sends?

import 'package:web_socket_channel/io.dart';

void main() async 
 IOWebSocketChannel channel;

 channel = IOWebSocketChannel.connect('ws://localhost:8080/');
 channel.stream.listen((data) , onError: (err) 
 print("err: $err");
 , onDone: () 
 print(
 "onDone. reason:[$channel.closeReason], code:[$channel.closeCode]");
 );

 print("sending a message");

 // how to check that channel's socket is in a connected state?
 channel.sink.add("hello");

 print("done");

dart flutter

share|improve this question

asked Mar 7 at 10:19

attdonaattdona

4,37521622

add a comment | 

0

I'm not able to understand how to check the status of a IOWebSocketChannel before adding a message to the sink or how to be notified for errors in case message is not sent.

Supposing web socket server is not listening on localhost:8080, how to check for channel.sink.add errors or to capture exceptions about failed socket sends?

import 'package:web_socket_channel/io.dart';

void main() async 
 IOWebSocketChannel channel;

 channel = IOWebSocketChannel.connect('ws://localhost:8080/');
 channel.stream.listen((data) , onError: (err) 
 print("err: $err");
 , onDone: () 
 print(
 "onDone. reason:[$channel.closeReason], code:[$channel.closeCode]");
 );

 print("sending a message");

 // how to check that channel's socket is in a connected state?
 channel.sink.add("hello");

 print("done");

dart flutter

share|improve this question

asked Mar 7 at 10:19

attdonaattdona

4,37521622

add a comment | 

I'm not able to understand how to check the status of a IOWebSocketChannel before adding a message to the sink or how to be notified for errors in case message is not sent.

Supposing web socket server is not listening on localhost:8080, how to check for channel.sink.add errors or to capture exceptions about failed socket sends?

import 'package:web_socket_channel/io.dart';

void main() async 
 IOWebSocketChannel channel;

 channel = IOWebSocketChannel.connect('ws://localhost:8080/');
 channel.stream.listen((data) , onError: (err) 
 print("err: $err");
 , onDone: () 
 print(
 "onDone. reason:[$channel.closeReason], code:[$channel.closeCode]");
 );

 print("sending a message");

 // how to check that channel's socket is in a connected state?
 channel.sink.add("hello");

 print("done");

dart flutter

share|improve this question

asked Mar 7 at 10:19

attdonaattdona

4,37521622

import 'package:web_socket_channel/io.dart';

void main() async 
 IOWebSocketChannel channel;

 channel = IOWebSocketChannel.connect('ws://localhost:8080/');
 channel.stream.listen((data) , onError: (err) 
 print("err: $err");
 , onDone: () 
 print(
 "onDone. reason:[$channel.closeReason], code:[$channel.closeCode]");
 );

 print("sending a message");

 // how to check that channel's socket is in a connected state?
 channel.sink.add("hello");

 print("done");

dart flutter

dart flutter

share|improve this question

asked Mar 7 at 10:19

attdonaattdona

4,37521622

share|improve this question

asked Mar 7 at 10:19

attdonaattdona

4,37521622

asked Mar 7 at 10:19

attdonaattdona

4,37521622

asked Mar 7 at 10:19

attdonaattdona

4,37521622