Menu
I have a webapp, which is running in a browser. That webapp is connected to a server, which uses websockets. So the communication between the server and my client/browser is based on websockets. If some magic event occurs on the server, some webservice sends a new XML / JSON to my webapp and the new data gets displayed.
But how do i, as the client / browser, know if the connection is stil alive? Lets say i do not get any new XML for about 30 seconds. How would i know if the connection is closed/broken/server offline or everything is fine, but on the server himself no new magic event occured.
429
In the search field, enter websocket . From the search results, click WebSocket Connection Status.
Keepalive in websockets Wait 20 seconds. Send a Ping frame.
WebSocket is a bidirectional communication protocol that can send the data from the client to the server or from the server to the client by reusing the established connection channel. The connection is kept alive until terminated by either the client or the server.
A websocket connection object has a readyState field which will tell you if the connection is still active (from the dart documentation). The readyState can be either
0 - connection not yet established 1 - conncetion established 2 - in closing handshake 3 - connection closed or could not open You can also define an event handler for the websocket close event if this is something you'd like to handle (try to reconnect, etc).
192
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
