How to get 408 error in browser?

Question

Node.js

There is a simple koa server. There is Chrome. The server has this code:

router.post(/\/api\/gw\/query/, async (ctx, next) => {
    await sleep(6 * 60000); // 6 минут
});

In the chrome source there is such a connection about
int64_t g_used_idle_socket_timeout_s = 300; // 5 minutes

My server has this:

server.keepAliveTimeout = 2000;
server.headersTimeout = 2000;

I can only get 504 this way
// server.setTimeout(5000);

But I'm trying to figure out how to get 408 without manually sending it from the server. If that's even possible.
And if not, when and under what conditions is 408 sent?

Answer 1

Everything turned out to be very simple
. You need to add a timeout (better done for a specific request) in the request

router.post(/\/api\/gw\/query/, async (ctx, next) => {
    ctx.request.socket.setTimeout(4000);
    await sleep(6 * 60000); // 6 минут
});

And add a timeout handler for the server

const server = app.listen(3000);
server.on('timeout', (socket) => {
    console.log('timeout', socket)
    socket.write([
        'HTTP/1.1 408 Request Timeout',
        'Connection: close'
    ].join('\n') + '\n\n');

    socket.end();
});