ConnectError: WebSocketException: Connection to 'https://admin.heartlinkdating.com:0/socket.io/?EIO=4&transport=websocket#' was not upgraded to websocket

[tungbnt]

I have handled the server side of the port part is websocket and polling but still getting the error. Looking forward to your answers. Thanks

[Nabinda]

I faced the same issue. Did you find any solutions regarding it

[AbdelrahmanElghoul]

facing the same issue. any update ? @Nabinda @tungbnt

[Kaizodo]

seems its adding port 0 on url https://admin.heartlinkdating.com:0 <---

also setPath is also not working

[Lele5353]

I faced the same issue. Did you find any solutions regarding it

[jumperchen]

Most of the time, this issue is not caused by this library itself. Instead, it may be caused by a server configuration issue either on Nginx or Apache, or by a socket version difference between the server and the client.

[jumperchen]

FYI Here is the solution: #319

[alexykuan]

Add extra HTTP-Header {'Upgrade': false} just solved my problem. Here's my sample code.

 socket = IO.io(
        server,
        IO.OptionBuilder()
            .enableAutoConnect()
            .enableForceNew()
            .setTransports(['websocket']).setExtraHeaders({'Upgrade': false}).build());

[alexykuan]

Add extra HTTP-Header {'Upgrade': false} just solved my problem. Here's my sample code.

 socket = IO.io(
        server,
        IO.OptionBuilder()
            .enableAutoConnect()
            .enableForceNew()
            .setTransports(['websocket']).setExtraHeaders({'Upgrade': false}).build());

socket_io_client: ^1.0.1