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'use strict' const path = require('path') const Koa = require('koa') const serve = require('koa-static') const convert = require('koa-convert') const serveIndex = require('koa-serve-index') const morgan = require('koa-morgan') const compress = require('koa-compress') const streamLogStats = require('stream-log-stats') const cors = require('kcors') const conditional = require('koa-conditional-get'); const etag = require('koa-etag'); const _ = require('koa-route') const mount = require('koa-mount') const httpProxy = require('http-proxy') const pathToRegexp = require('path-to-regexp')
/** * @module local-web-server */ module.exports = getApp
function getApp (options) { options = Object.assign({ static: {}, serveIndex: {}, log: {}, compress: false, blacklist: [], directories: [], proxyRoutes: [] }, options)
const log = options.log log.options = log.options || {}
const app = new Koa() const _use = app.use app.use = x => _use.call(app, convert(x))
const proxy = httpProxy.createProxyServer({ changeOrigin: true })
// app.use(_.all('/api/*', function * (apiPath) {
// this.response = false
// proxy.once('proxyReq', function (proxyReq, req, res, options) {
// proxyReq.path = `http://registry.npmjs.org/${apiPath}`;
// })
// proxy.web(this.req, this.res, { target: `http://registry.npmjs.org/${apiPath}` })
// }))
// app.use(mount('/gh', function * (next) {
// this.response = false
// proxy.web(this.req, this.res, { target: 'https://api.github.com' })
// }))
// app.use(_.get('/:one/gh/:two', function * (one, two) {
// this.response = false
// proxy.once('proxyReq', function (proxyReq, req, res, options) {
// proxyReq.path = `https://api.github.com/${one}/${two}`;
// })
// proxy.web(this.req, this.res, { target: `https://api.github.com/${one}/${two}` })
// }))
// app.use(_.get('/*/yeah/:one/*', function * (one, two) {
// console.log(arguments);
// this.response = false
// proxy.once('proxyReq', function (proxyReq, req, res, options) {
// proxyReq.path = `https://api.github.com/${one}/${two}`;
// })
// proxy.web(this.req, this.res, { target: `https://api.github.com/${one}/${two}` })
// }))
// const proxyRoutes = [
// // { mount: '/api', to: 'http://registry.npmjs.org' },
// // { mount: '/gh', to: 'http://https://api.github.com' },
// { from: '/:one/gh/:two', to: 'https://api.github.com/${one}/${two}' },
// { from: '/api/*', to: 'http://registry.npmjs.org/${0}' },
// ]
options.proxyRoutes.forEach(route => { app.use(_.all(route.from, function * () { const keys = [] route.re = pathToRegexp(route.from, keys) route.new = route.to
this.response = false keys.forEach((key, index) => { const re = { token: RegExp('\\$\\{' + key.name + '\\}', 'g'), index: RegExp('\\$\\{' + index + '\\}', 'g') } route.new = route.new .replace(re.token, arguments[index] || '') .replace(re.index, arguments[index] || '')
// console.log('==========');
// console.log(arguments);
// console.log(re);
// console.log(index);
// console.log(route);
}) proxy.once('proxyReq', function (proxyReq) { proxyReq.path = route.new; }) proxy.web(this.req, this.res, { target: route.new }) })) })
/* CORS: allow from any origin */ app.use(cors())
/* path blacklist */ if (options.blacklist.length) { app.use(function pathBlacklist (ctx, next) { if (options.blacklist.some(regexp => regexp.test(ctx.path))) { ctx.throw(403, 'Blacklisted') } else { return next() } }) }
app.use(conditional()) app.use(etag())
/* mime-type overrides */ if (options.mime) { app.use((ctx, next) => { return next().then(() => { const reqPathExtension = path.extname(ctx.path).slice(1) Object.keys(options.mime).forEach(mimeType => { const extsToOverride = options.mime[mimeType] if (extsToOverride.indexOf(reqPathExtension) > -1) ctx.type = mimeType }) }) }) }
/* compress response */ if (options.compress) { app.use(compress()) }
/* special case log formats */ if (log.format) { if (log.format === 'none'){ log.format = undefined } else if (log.format === 'logstalgia') { morgan.token('date', logstalgiaDate) log.format = 'combined' } /* if no specific log format was requested, show log stats */ } else { log.format = 'common' log.options.stream = streamLogStats({ refreshRate: 500 }) } if (log.format) app.use(morgan.middleware(log.format, log.options))
// options.static.root = [
// { route: '/one', root: 'lib' },
// { route: '/two', root: 'node_modules' }
// ]
/* serve static files */ if (options.static.root) { app.use(serve(options.static.root, options.static.options)) // options.static.root.forEach(config => {
// app.use(mount(config.route, serve(config.root)))
// app.use(mount(config.route, serveIndex(config.root)))
// })
}
/* serve directory index */ if (options.serveIndex.path) { app.use(serveIndex(options.serveIndex.path, options.serveIndex.options)) }
return app }
function logstalgiaDate () { var d = new Date() return (`${d.getDate()}/${d.getUTCMonth()}/${d.getFullYear()}:${d.toTimeString()}`) .replace('GMT', '') .replace(' (BST)', '') }
process.on('unhandledRejection', (reason, p) => { throw reason })
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