How to get WebSocket URL

[Vikram Tiwari]

Hey folks,

The only way (that I am aware of) to get chrome's debugging websocket url is:

- stop all running chrome processes

- start chrome with flag --remote-debugging-port=9222

- the websocket url will be printed in console with ws://127.0.0.1:9222/devtools/browser/<unique_id>

Are there any other ways to get this url? Best case would be that I don't have to stop and restart chrome with the debug flag.

Other ideas/questions:

- Can a chrome extension can get this websocket url?

- Can I always start chrome with debug flag somehow? Editing Info.plist or windows registry?

- Can I add some js code in the page which can get the websocket url?

Open to any other ideas. :)

Thanks folks!

[Black-Hole]

1. You can use http://127.0.0.1:9222/json, 

2. Yes

3. You can add commands to its chrome executable file. e.g:https://www.chromium.org/developers/how-tos/run-chromium-with-flags

4. 

const wsList = {};
const getWsList = () => {
  return new Promise((resolve) => {
    http.get('http://127.0.0.1:9222/json', res => {
      res.addListener('data', data => {
        try {
          const result = JSON.parse(data.toString());
          const tempWsList = {};

          result.forEach(info => {
            if (typeof wsList[info.id] === 'undefined') {
              tempWsList[info.id] = info.webSocketDebuggerUrl;
              wsList[info.id] = info.webSocketDebuggerUrl;
            }
          });

          if (Object.keys(tempWsList).length !== 0) {
            resolve(tempWsList);
          }
        } catch (e) {
          console.error(e);
        }
      });
    });
  });
};

setInterval(() => {
  getWsList().then(list => {
    Object.values(list).forEach(wsUrl => {
      const client = new WebSocket(wsUrl);
      console.log(client)
    })
  });
}, 1000);

Vikram Tiwari <vikram...@gmail.com> 于2019年7月3日周三 上午5:34写道：

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[laike9m (laike9m)]

I think what you need is 

http://127.0.0.1:9222/json/version