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|
'use strict'
const {createServer: createTlsServer} = require('tls')
const {EventEmitter} = require('events')
const {createParser} = require('./lib/parser')
const createResponse = require('./lib/response')
const ALPN_ID = 'gemini' // todo: clarify this
const createGeminiServer = (opt = {}, onRequest) => {
if (typeof opt === 'function') {
onRequest = opt
opt = {}
}
const {
tlsOpt,
} = {
tlsOpt: {},
...opt,
}
const onConnection = (socket) => {
const req = createParser()
socket.pipe(req)
socket.once('error', (err) => {
socket.unpipe(req)
req.destroy(err)
})
const close = () => {
socket.destroy()
req.destroy()
}
let timeout = setTimeout(close, 20 * 1000)
req.once('header', (header) => {
clearTimeout(timeout)
// prepare req
req.socket = socket
req.url = header.url
const url = new URL(header.url, 'http://foo/')
req.path = url.pathname
// todo: req.abort(), req.destroy()
// prepare res
const res = createResponse()
res.pipe(socket)
res.once('error', (err) => {
console.error('error', err)
res.unpipe(socket)
socket.destroy(err)
})
Object.defineProperty(res, 'socket', {value: socket})
onRequest(req, res)
server.emit('request', req, res)
})
}
const server = createTlsServer({
// ALPNProtocols: [ALPN_ID],
// https://gemini.circumlunar.space/docs/spec-spec.txt#1.4.1
// > Servers MUST use TLS version 1.2 or higher and SHOULD use TLS version
// > 1.3 or higher.
minVersion: 'TLSv1.2',
...tlsOpt,
}, onConnection)
return server
}
// https://gemini.circumlunar.space/docs/spec-spec.txt, 1.
// > When Gemini is served over TCP/IP, servers should listen on port 1965
// > (the first manned Gemini mission, Gemini 3, flew in March '65).
createGeminiServer.DEFAULT_PORT = 1965
module.exports = createGeminiServer
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