express-router-dynamic

Express Router which loads js codes dynamically as well as serves static files, and routes based on directory structure.

Note: you are reading the doc of v2.x, which has many breaking changes from v1.x. v1.x is deprecated and will not receive maintenance (except for high severity security vulnerabilities). If you still want to use v1.x, please checkout to branch v1.

Feature

• Put static files and JS dynamic request handlers in the same webroot dir, serve both in the same website
• Match file in the webroot dir by URL like any other static file server, but when matched file is ended with .route.js(which can be user-defined)

Usage

Install and Import

npm i express-router-dynamic --save

Import

import {DynamicRouter} from 'express-router-dynamic'

or

const {DynamicRouter} = require('express-router-dynamic')

Minimal Usage:

// app.js
import express from 'express'
const app = express()
app.use(dynamicRouter({
    webroot: "./route" // your web root, which saves dynamic .route.js and static files altogether
}))
app.listen(8000)

Then, put some example index.route.js in directory ./route:

// route/index.route.js
exports.default = function (req, res) {
    res.send("Hello World!")
}

Run your app and visit http://localhost:8000/, you will see Hello World!.

Route Files Organization Example

Organize your files like the following:

│
├───routes
│   ├───index.route.js
│   ├───sample.html
│   └───subdir
│       ├───a.route.js
│       ├───b.html
│       └───c.js
│
└───app.js

Then, by visiting the following URLs, you will get:

URL	Result	File
/	Execute JS Code	index.route.js
/sample	Serve Static File	sample.html
/sample.html	Serve Static File	sample.html
/subdir/a	Execute JS Code	subdir/a.route.js
/subdir/b	Serve Static File	subdir/b.html
/subdir/c	404
/subdir/c.js	Serve Static File	subdir/c.js

Advanced Usage:

In the following example, your server will treat all .js files as Node.js Code, so you cannot serve browser JS files to user.
Besides, your server will be able to import ESModule (Use with caution! See instructions in config.ts) as well as record more logs.

import express from 'express'
const app = express()
const config = {
    webroot: "./route",
    exec: ["*.js"],
    suffix: [".js", ".html"],
    index: ["index.js", "index.html"],
    handler_error_log_level: "warn",
    use_esm_import: "when_require_failed",
    log4js_level: "debug",
}
app.use(dynamicRouter(config))
app.listen(8000)

You will still be able to serve static JS files in subdirectories, by using DirectoryConfig. For example, create route/frontend/__config__.js:

module.exports = {
    exec: [],
    index: ["index.html"]
}

By doing that, all JS files in the frontend dir will not be executed, instead they will be served as static files.

Config

Instructions

THere are two types of config: instance-level config (Config) and directory-level config (DirectoryCOnfig).
Instance-level config should be specified as the argument of constructor, and cannot (should not) be modified later.
Directory-level can be specified in each directory in the webroot, which will also be watched and reloaded once changed.

Reference

Please see config.ts, which has full instructions and detailed notes about all available config terms.

We are sorry that there are only Chinese notes in config.ts. Translations are highly welcomed.

Remind

• On some platforms (e.g. Windows), executing npm install under a watched directory (i.e. directory that are set in realwebroot or libwebroot) may fail. If your route files contain a package.json, please install its dependency in the application's root directory, by executing something similar to cd projectRoot && npm install ./route/xxx, in which ./route/xxx is the directory contains your router and its package.json file.

Contribute

All types of contributions are welcomed! Please feel free to raise issues and/or submit PRs. You may use English or Chinese in issues and PRs.

License

MIT