/
server.ts
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/
server.ts
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import { Request } from './api.ts'
import { createHtml } from './html.ts'
import log from './log.ts'
import { getContentType } from './mime.ts'
import { injectHmr, Project } from './project.ts'
import { path, serve, ws } from './std.ts'
import util, { existsFileSync, hashShort } from './util.ts'
export async function start(appDir: string, port: number, isDev = false, reload = false) {
const project = new Project(appDir, isDev ? 'development' : 'production', reload)
await project.ready
while (true) {
try {
const s = serve({ port })
log.info(`Server ready on http://localhost:${port}`)
for await (const req of s) {
const url = new URL('http://localhost/' + req.url)
const pathname = util.cleanPath(url.pathname)
const resp = new Request(req, { pathname, params: {}, query: new URLSearchParams() })
try {
// serve hmr ws
if (pathname === '/_hmr') {
const { conn, r: bufReader, w: bufWriter, headers } = req
ws.acceptWebSocket({ conn, bufReader, bufWriter, headers }).then(async socket => {
const watcher = project.createFSWatcher()
watcher.on('add', (moduleId: string, hash: string) => socket.send(JSON.stringify({
type: 'add',
moduleId,
hash
})))
watcher.on('remove', (moduleId: string) => {
watcher.removeAllListeners('modify-' + moduleId)
socket.send(JSON.stringify({
type: 'remove',
moduleId
}))
})
for await (const e of socket) {
if (util.isNEString(e)) {
try {
const data = JSON.parse(e)
if (data.type === 'hotAccept' && util.isNEString(data.id)) {
const mod = project.getModule(data.id)
if (mod) {
watcher.on('modify-' + mod.id, (hash: string) => socket.send(JSON.stringify({
type: 'update',
moduleId: mod.id,
hash,
updateUrl: path.join('/', project.config.baseUrl, '/_aleph/', mod.id.replace(/\.js$/, '') + `.${hash!.slice(0, hashShort)}.js`)
})))
}
}
} catch (e) { }
} else if (ws.isWebSocketCloseEvent(e)) {
break
}
}
project.removeFSWatcher(watcher)
})
continue
}
// serve APIs
if (pathname.startsWith('/api/')) {
project.callAPI(req, { pathname, search: url.search })
continue
}
// serve dist files
if (pathname.startsWith('/_aleph/')) {
if (pathname.startsWith('/_aleph/data/') && pathname.endsWith('/data.js')) {
const [p, s] = util.splitBy(util.trimSuffix(util.trimPrefix(pathname, '/_aleph/data'), '/data.js'), '@')
const [status, data] = await project.getPageData({ pathname: p, search: s })
if (status === 200) {
resp.send(`export default ` + JSON.stringify(data), 'application/javascript; charset=utf-8')
} else {
resp.end(status)
}
continue
} else if (pathname.endsWith('.css')) {
const filePath = path.join(project.buildDir, util.trimPrefix(pathname, '/_aleph/'))
if (existsFileSync(filePath)) {
const body = await Deno.readFile(filePath)
resp.send(body, 'text/css; charset=utf-8')
continue
}
} else {
const reqSourceMap = pathname.endsWith('.js.map')
const mod = project.getModuleByPath(reqSourceMap ? pathname.slice(0, -4) : pathname)
if (mod) {
const etag = req.headers.get('If-None-Match')
if (etag && etag === mod.hash) {
resp.end(304)
continue
}
let body = ''
if (reqSourceMap) {
body = mod.jsSourceMap
} else {
body = mod.jsContent
if (project.isHMRable(mod.id)) {
body = injectHmr({ ...mod, jsContent: body })
}
}
resp.setHeader('ETag', mod.hash)
resp.send(body, `application/${reqSourceMap ? 'json' : 'javascript'}; charset=utf-8`)
continue
}
}
}
// serve public files
const filePath = path.join(project.appRoot, 'public', pathname)
if (existsFileSync(filePath)) {
const info = await Deno.lstat(filePath)
if (info.mtime?.toUTCString() === req.headers.get('If-Modified-Since')) {
resp.end(304)
continue
}
const body = await Deno.readFile(filePath)
resp.setHeader('Last-Modified', info.mtime!.toUTCString())
resp.send(body, getContentType(filePath))
continue
}
// ssr
const [status, html] = await project.getPageHtml({ pathname, search: url.search })
resp.status(status).send(html, 'text/html; charset=utf-8')
} catch (err) {
resp.status(500).send(createHtml({
lang: 'en',
head: ['<title>500 - internal server error</title>'],
body: `<p><strong><code>500</code></strong><small> - </small><span>${err.message}</span></p>`
}), 'text/html; charset=utf-8')
}
}
} catch (err) {
if (err instanceof Deno.errors.AddrInUse) {
log.warn(`port ${port} already in use, try ${port + 1}`)
port++
} else {
log.fatal(err.message)
}
}
}
}