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index.js
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import { handler } from './handler.js';
import { env } from './env.js';
import http from 'http';
import * as qs from 'querystring';
function parse$1 (str, loose) {
if (str instanceof RegExp) return { keys:false, pattern:str };
var c, o, tmp, ext, keys=[], pattern='', arr = str.split('/');
arr[0] || arr.shift();
while (tmp = arr.shift()) {
c = tmp[0];
if (c === '*') {
keys.push('wild');
pattern += '/(.*)';
} else if (c === ':') {
o = tmp.indexOf('?', 1);
ext = tmp.indexOf('.', 1);
keys.push( tmp.substring(1, !!~o ? o : !!~ext ? ext : tmp.length) );
pattern += !!~o && !~ext ? '(?:/([^/]+?))?' : '/([^/]+?)';
if (!!~ext) pattern += (!!~o ? '?' : '') + '\\' + tmp.substring(ext);
} else {
pattern += '/' + tmp;
}
}
return {
keys: keys,
pattern: new RegExp('^' + pattern + (loose ? '(?=$|\/)' : '\/?$'), 'i')
};
}
class Trouter {
constructor() {
this.routes = [];
this.all = this.add.bind(this, '');
this.get = this.add.bind(this, 'GET');
this.head = this.add.bind(this, 'HEAD');
this.patch = this.add.bind(this, 'PATCH');
this.options = this.add.bind(this, 'OPTIONS');
this.connect = this.add.bind(this, 'CONNECT');
this.delete = this.add.bind(this, 'DELETE');
this.trace = this.add.bind(this, 'TRACE');
this.post = this.add.bind(this, 'POST');
this.put = this.add.bind(this, 'PUT');
}
use(route, ...fns) {
let handlers = [].concat.apply([], fns);
let { keys, pattern } = parse$1(route, true);
this.routes.push({ keys, pattern, method:'', handlers });
return this;
}
add(method, route, ...fns) {
let { keys, pattern } = parse$1(route);
let handlers = [].concat.apply([], fns);
this.routes.push({ keys, pattern, method, handlers });
return this;
}
find(method, url) {
let isHEAD=(method === 'HEAD');
let i=0, j=0, k, tmp, arr=this.routes;
let matches=[], params={}, handlers=[];
for (; i < arr.length; i++) {
tmp = arr[i];
if (tmp.method.length === 0 || tmp.method === method || isHEAD && tmp.method === 'GET') {
if (tmp.keys === false) {
matches = tmp.pattern.exec(url);
if (matches === null) continue;
if (matches.groups !== void 0) for (k in matches.groups) params[k]=matches.groups[k];
tmp.handlers.length > 1 ? (handlers=handlers.concat(tmp.handlers)) : handlers.push(tmp.handlers[0]);
} else if (tmp.keys.length > 0) {
matches = tmp.pattern.exec(url);
if (matches === null) continue;
for (j=0; j < tmp.keys.length;) params[tmp.keys[j]]=matches[++j];
tmp.handlers.length > 1 ? (handlers=handlers.concat(tmp.handlers)) : handlers.push(tmp.handlers[0]);
} else if (tmp.pattern.test(url)) {
tmp.handlers.length > 1 ? (handlers=handlers.concat(tmp.handlers)) : handlers.push(tmp.handlers[0]);
}
} // else not a match
}
return { params, handlers };
}
}
/**
* @typedef ParsedURL
* @type {import('.').ParsedURL}
*/
/**
* @typedef Request
* @property {string} url
* @property {ParsedURL} _parsedUrl
*/
/**
* @param {Request} req
* @returns {ParsedURL|void}
*/
function parse(req) {
let raw = req.url;
if (raw == null) return;
let prev = req._parsedUrl;
if (prev && prev.raw === raw) return prev;
let pathname=raw, search='', query;
if (raw.length > 1) {
let idx = raw.indexOf('?', 1);
if (idx !== -1) {
search = raw.substring(idx);
pathname = raw.substring(0, idx);
if (search.length > 1) {
query = qs.parse(search.substring(1));
}
}
}
return req._parsedUrl = { pathname, search, query, raw };
}
function onError(err, req, res) {
let code = typeof err.status === 'number' && err.status;
code = res.statusCode = (code && code >= 100 ? code : 500);
if (typeof err === 'string' || Buffer.isBuffer(err)) res.end(err);
else res.end(err.message || http.STATUS_CODES[code]);
}
const mount = fn => fn instanceof Polka ? fn.attach : fn;
class Polka extends Trouter {
constructor(opts={}) {
super();
this.parse = parse;
this.server = opts.server;
this.handler = this.handler.bind(this);
this.onError = opts.onError || onError; // catch-all handler
this.onNoMatch = opts.onNoMatch || this.onError.bind(null, { status: 404 });
this.attach = (req, res) => setImmediate(this.handler, req, res);
}
use(base, ...fns) {
if (base === '/') {
super.use(base, fns.map(mount));
} else if (typeof base === 'function' || base instanceof Polka) {
super.use('/', [base, ...fns].map(mount));
} else {
super.use(base,
(req, _, next) => {
if (typeof base === 'string') {
let len = base.length;
base.startsWith('/') || len++;
req.url = req.url.substring(len) || '/';
req.path = req.path.substring(len) || '/';
} else {
req.url = req.url.replace(base, '') || '/';
req.path = req.path.replace(base, '') || '/';
}
if (req.url.charAt(0) !== '/') {
req.url = '/' + req.url;
}
next();
},
fns.map(mount),
(req, _, next) => {
req.path = req._parsedUrl.pathname;
req.url = req.path + req._parsedUrl.search;
next();
}
);
}
return this; // chainable
}
listen() {
(this.server = this.server || http.createServer()).on('request', this.attach);
this.server.listen.apply(this.server, arguments);
return this;
}
handler(req, res, next) {
let info = this.parse(req), path = info.pathname;
let obj = this.find(req.method, req.path=path);
req.url = path + info.search;
req.originalUrl = req.originalUrl || req.url;
req.query = info.query || {};
req.search = info.search;
req.params = obj.params;
if (path.length > 1 && path.indexOf('%', 1) !== -1) {
for (let k in req.params) {
try { req.params[k] = decodeURIComponent(req.params[k]); }
catch (e) { /* malform uri segment */ }
}
}
let i=0, arr=obj.handlers.concat(this.onNoMatch), len=arr.length;
let loop = async () => res.finished || (i < len) && arr[i++](req, res, next);
(next = next || (err => err ? this.onError(err, req, res, next) : loop().catch(next)))(); // init
}
}
function polka (opts) {
return new Polka(opts);
}
const path = env('SOCKET_PATH', false);
const host = env('HOST', '0.0.0.0');
const port = env('PORT', !path && '3000');
const server = polka().use(handler);
server.listen({ path, host, port }, () => {
console.log(`Listening on ${path ? path : host + ':' + port}`);
});
export { host, path, port, server };