module main import rand import time import vweb import vweb.sse struct App { vweb.Context } fn main() { vweb.run(8081) } pub fn (mut app App) init_once() { app.serve_static('/favicon.ico', 'favicon.ico', 'img/x-icon') app.handle_static('.', false) } pub fn (mut app App) index() vweb.Result { title := 'SSE Example' return $vweb.html() } fn (mut app App) sse() vweb.Result { mut session := sse.new_connection(app.conn) // NB: you can setup session.write_timeout and session.headers here session.start() or { return app.server_error(501) } session.send_message(data: 'ok') or { return app.server_error(501) } for { data := '{"time": "$time.now().str()", "random_id": "$rand.ulid()"}' session.send_message(event: 'ping', data: data) or { return app.server_error(501) } println('> sent event: $data') time.sleep(1 * time.second) } return app.server_error(501) }