Http Server
A minimal HTTP server, built on the select-based event loop that lets the listening socket's readiness and the timer queue share one wait instead of two competing loops. req.headers/ req.query/req.body and an optional response `headers` field round out request/response handling beyond just method/path/status/body.
http.listen never returns on its own, so this example schedules a setTimeout that exits the process after a short delay — the same trick that lets `make examples` verify this file runs to completion without needing a real HTTP client to connect to it. See http_close.ts for the same idea done via http.close instead of process.exit. Point a real client at it while it's running to see it actually serve a request, e.g.: curl -H "X-Greeting: hi" "http://localhost:8080/hello?name=world" curl -X POST -d '{"k":"v"}' "http://localhost:8080/echo"
import http from 'http'
interface Res {
status: number
body: string
headers: Map<string, string>
}
let requestCount = 0
setTimeout(() => {
console.log('shutting down after ' + requestCount + ' request(s)')
process.exit(0)
}, 300)
console.log('listening on :8080')
http.listen(8080, (req: HttpRequest): Res => {
requestCount = requestCount + 1
let respHeaders: Map<string, string> = new Map<string, string>()
respHeaders.set('Content-Type', 'text/plain')
if (req.path === '/hello') {
let name: string = req.query.has('name') ? req.query.get('name') : 'stranger'
let greeting: string = req.headers.has('x-greeting') ? req.headers.get('x-greeting') : 'hello'
return { status: 200, body: greeting + ', ' + name + ' (' + req.method + ' ' + req.path + ')', headers: respHeaders }
}
if (req.path === '/echo') {
return { status: 200, body: 'you sent: ' + req.body, headers: respHeaders }
}
return { status: 404, body: 'not found: ' + req.path, headers: respHeaders }
})