Retries [Feature]

Expected behavior

Ability to have the proxy automatically retry on events like ‘ECONNREFUSED’.

Proposed api

I imagine it would look something like this:

{
  target: 'localhost:9090',
  retry: {
    timeout: 1000,
    limit: 10
  }
}

Where the proxy would attempt the request again on failure every 1 second for at least 10 times.

[SystemParadox]

For the case when the server is in a separate process, I created a connection to monitor the state of the server like this:

new WebpackDevServer({
    ...,
    setup: function (app) {
        var net = require('net');
        var opts = { port: 8082 };
        var socket = net.connect(opts);
        var connected = false;
        socket.on('connect', function () {
            console.log('[PROXY] connected');
            connected = true;
        }); 
        socket.on('error', function (err) {
            console.log('[PROXY] Error: ' + err.message);
        }); 
        socket.on('close', function (err) {
            console.log('[PROXY] closed');
            connected = false;
            setTimeout(function () {
                console.log('[PROXY] connecting...');
                socket.connect(opts);
            }, 1000);
        }); 
        app.use(function (req, res, next) {
            if (connected) {
                next();
            } else {
                socket.once('connect', function () {
                    next();
                }); 
            }   
        }); 
    }   
}

[SystemParadox]

Ah I see. Yes my server is a different process (spawned with node-dev) so I can’t find out if it’s listening so easily.

Thanks for the snippet though, might still come in handy.