mORMot Open Source

radexpol

Member

From: Poland, Krk

Registered: 2019-11-29

Posts: 116

LongWorkClient Demo for Web

Can someone help me how to implement \Samples\31 - WebSockets to work on web together with delphi client? 

I tried postman:
ws://localhost:8888/root/LongWorkCallback.WorkFinished

Request URL: http://localhost:8888/root/LongWorkCallback.WorkFinished
Request Method: GET
Status Code: 400 WebSocket Upgrade Error

I have no idea how to start the websocket listener that will handle particular events.

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,655

Website

Re: LongWorkClient Demo for Web

The protocol used is an encapsulation of REST over the WebSockets frames, in both directions.
So the URL is not a "postman" URI.

So, you can't use interface callbacks with a Web client.
Define your own protocol, then use a frame to notify the client from the server. But you won't be able to do it directly from an interface.

It may be feasible to make a Web client compatible with the mORMot REST encapsulation, but it is somewhat complex.
There is a full query/answer pattern added to the WS frames limited layout.
The reference code is TWebSocketProtocolJson.FrameDecompress/FrameDecompress as used by the TWebSocketProtocolRest class.