CODEWITHSUNDEEP
qtwebsocketqtcpserver
user1608693
user1608693

Reputation: 31

Providing a WebSockets server in a Qt application

I have created a QTcpServer on port 1024. I want to connect to it from a websocket by using the URL ws://localhost:1024, but it is not getting connected. Can't we connect websockets to regular TCP server sockets?

Upvotes: 2

Views: 5135

Answers (3)

Kurt Pattyn
Kurt Pattyn

Reputation: 2788

As Ihor indicated, a WebSocket starts with an HTTP request, which is then upgraded to a WebSocket. You can have a look at QtWebSockets. It is part of the Qt playground, and can be used both for client and server implementations.

Upvotes: 0

Erik
Erik

Reputation: 61

Slightly disengenuous information. They are NOT "built upon" HTTP, WebSocket's are much closer to the TCP layer. However they require the upgrade server handshake via an HTTP request.

link to the RFC - https://www.rfc-editor.org/rfc/rfc6455#section-1.7

Upvotes: 0

Ihor Kaharlichenko
Ihor Kaharlichenko

Reputation: 6260

Websockets aren't pure TCP sockets. Under the hood they use a custom protocol that is built on top HTTP. So the layering looks like this: IP > TCP > HTTP > WebSocket.

Therefore to provide a websocket server in Qt you need websocket protocol implementation. Check out QtWebsocket for that implementation.

Upvotes: 7

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