Connect to multiple devices

Hi! I recently install this plugin and im trying to use with express. I want to manipulate the camera from mobile app as client. The problem is that i need to connect multiple devices at the same time, depend of the client and available ip for his user. I want to know if it is possible and if there is some way to handle this situation. I recently was trying to return the cam instance as response, but later i cannot get uri.

var onvif = require('onvif');
var app = require('express')();
var bodyParser = require('body-parser')
var port = 3000

app.use(function (req, res, next) {
  res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
  next();
});
app.use(bodyParser.json());

app.get('/connect',(req,res)=>{
    var body = req.body;
    var camData = body['camData'];
    return new onvif.Cam({
        hostname: camData.ip,
        port:camData.port,
        username: camData.username,
        password: camData.password
      }, function(err) {
        return res.send(this);
      });
})
app.post('/getUri',(req,res)=>{
    var body = req.body;
    var cam = body['cam'];
    console.log(cam);
    cam.getStreamUri({}, function(err, stream) {
        return res.send(stream);
    })
})
app.listen(port, console.log);

Another question is, do i need to connect in every request? is the only solution? Im really noob at working with ONVIF protocol, so sorry if im not explaining well, but thank you anyway!

[Motoralfa]

@Motoralfa you can use a Map in which you can store different cams and in the /getUri endpoint send also info which cam you want. Or store in the user’s session this info. Or something else… I don’t know your current case. Simple example with host-port info:

...
let cams = {};

app.get('/connect',(req,res)=>{
   ...
    cams[`${camData.ip}-${camData.port}`] = new onvif.Cam({
        hostname: camData.ip,
        port: camData.port,
        username: camData.username,
        password: camData.password
    }, function(err) {
      if (err) {return res.send(err.message);}
      res.send('connected');
    });
});
...
app.post('/getUri', (req,res)=>{
    var body = req.body;
    const camData = body.camData;
    const camInfo = `${camData.ip}-${camData.port}`;
    const cams = cams[camInfo]; 
    if (!cam) {
      return res.send('not connected');
    }
    cam.getStreamUri({}, function(err, stream) {
        return res.send(stream);
    });
})

Thank you so much @agsh . Seriously this help me a lot, i was thinking in implement something like that but i didnt know if it was right. Now i have an idea about how to face the situation! 👍

[agsh]

@Motoralfa you can use a Map in which you can store different cams and in the /getUri endpoint send also info which cam you want. Or store in the user’s session this info. Or something else… I don’t know your current case. Simple example with host-port info:

...
let cams = {};

app.get('/connect',(req,res)=>{
   ...
    cams[`${camData.ip}-${camData.port}`] = new onvif.Cam({
        hostname: camData.ip,
        port: camData.port,
        username: camData.username,
        password: camData.password
    }, function(err) {
      if (err) {return res.send(err.message);}
      res.send('connected');
    });
});
...
app.post('/getUri', (req,res)=>{
    var body = req.body;
    const camData = body.camData;
    const camInfo = `${camData.ip}-${camData.port}`;
    const cams = cams[camInfo]; 
    if (!cam) {
      return res.send('not connected');
    }
    cam.getStreamUri({}, function(err, stream) {
        return res.send(stream);
    });
})