Error While Disconnecting from Webscoket Client

[mardommah]

When trying to disconnect from websocket using postman or insomnia, always returning error like this

[mikuso]

It looks like you're not handling a certain condition.

Can you provide a small sample of code which I can use to replicate the issue?

[mardommah]

Hello, here my code example, currently im integrating it with express js to create command initiated by central system -> charging station

rpc.js

api.js

server.js

[mikuso]

Hi @mardommah ,

Can you please copy + paste the code so that I can try running it? I'd rather not have to re-type it.

[mardommah]

okay here's the code

server.js

`const express = require('express');
const serverRouter = require('./api')
const rpcServer = require("./rpc")

const app = express();
app.use(serverRouter)
const httpServer = app.listen(3002, 'localhost', () => {
console.log("server running on 3002")
});

httpServer.on('upgrade', rpcServer.handleUpgrade);

`

rpc.js

`
const { RPCServer } = require('ocpp-rpc');

const rpcServer = new RPCServer({
protocols: ['ocpp1.6'],
strictMode: false
});

rpcServer.on('client', client => {
// RPC client connected
client.call('Say', Hello, ${client.identity}!);

// create a specific handler for handling Heartbeat requests
client.handle('Heartbeat', ({ params }) => {
    console.log(`Server got Heartbeat from ${client.identity}:`, params);

    // respond with the server's current time.
    return {
        currentTime: new Date().toISOString()
    };

});

client.once('close', () => {
    // check that we're about to delete the correct client
    return "client disconnected"
});

});

module.exports = rpcServer `

api.js

`const express = require('express');
const rpcServer = require("./rpc")

const serverRouter = express.Router();

serverRouter.use(express.json())

// when clients connect (after auth), store them in a Map based on their identity
const clients = new Map();

rpcServer.on('client', client => {
clients.set(client.identity, client);

// when clients disconnect, remove them from our Map
client.once('close', () => {
    // check that we're about to delete the correct client
    if (clients.get(client.identity) === client) {
        clients.delete(client.identity);
    }
});

});

serverRouter.post('/reset/:cp', async (req, res, next) => {

const cp = req.params.cp;
const client = clients.get(cp);
console.log(cp)
const result = await client.call('Reset', { type: 'Hard' });
res.json({
    Status: "Success"
});

});

module.exports = serverRouter`

[mikuso]

Hi @mardommah ,

I wasn't able to reproduce this issue with the code you've provided. I have attempted to connect a simple client to localhost:3002 but it does not trigger the error.

Can you give me more details of how to reproduce the error you've reported, using this code?