Function startServer

frontend/utils.mjs:341–405

(opts = {})

}

export function startServer(opts = {}) {
    const host = opts.host || defaultHost
    const port = opts.port || defaultPort
    const absWorkingDir = opts.absWorkingDir || '.'

    console.log(`🍱 Starting server at http://${host}:${port}`)

    let resolve = null
    let ifPaused = null
    function pauseServer() {
        if (!ifPaused) {
            ifPaused = new Promise((r) => (resolve = r))
        }
    }
    function resumeServer() {
        resolve?.()
        ifPaused = null
    }
    resumeServer()

    const app = express()
    app.on('error', function (e) {
        if (e.code === 'EADDRINUSE') {
            console.error(`🛑 http://${host}:${port} is already in use. Trying another port.`)
        } else {
            console.error(`🛑 ${e}`)
        }
        process.exit(1)
    })
    app.use(cors())
    app.get('/_reload', (request, response) => {
        response.writeHead(200, {
            'Content-Type': 'text/event-stream',
            Connection: 'keep-alive',
            'Cache-Control': 'no-cache',
        })
        clients.add(response)
        request.on('close', () => clients.delete(response))
    })
    app.get('*', async (req, res) => {
        if (req.url.startsWith('/static/')) {
            if (ifPaused) {
                if (!ifPaused.logged) {
                    console.log('⌛️ Waiting for build to complete...')
                    ifPaused.logged = true
                }
                await ifPaused
            }
            const pathFromUrl = req.url.replace(/^\/static\//, '')
            const filePath = path.resolve(absWorkingDir, 'dist', pathFromUrl)
            // protect against "/../" urls
            if (filePath.startsWith(path.resolve(absWorkingDir, 'dist'))) {
                res.sendFile(filePath.split('?')[0])
                return
            }
        }
        res.sendFile(path.resolve(absWorkingDir, 'dist', 'index.html'))
    })