NodeJS run-middleware

NodeJS module to execute your Express endpoints (middlewares) from your code. This module will let you manually launch all your middleware. It is simulating a client calling your rest APIs, without using a network connection (your server does not even need to listen on a port).

Why?

Many times, your server and your client, need to execute the same functions. For example here is an endpoint to get user details:

app.get('/get-user/:id', (req, res) => {
  mysql.query('select * from users where id=?', [req.params.id], (err, rows) => {
    res.send({
      user: rows[0]
    });
  });
});

Now you want to get the user details from your code. What should you do?

app.runMiddleware('/get-user/20', (_, body) => {
  console.log(`User details: ${body}`);
});

Installation

npm i -S run-middleware

const express = require('express');
const app = express();
const runMiddleware = require('run-middleware');

runMiddleware(app);

Support & Contributions

• Pull requests, issues, and English proofreading are welcome on Github.
• Question & support on StackOverflow using run-middlewaretag.

Change request paramaters

As options you can pass the query, body, method and cookies parameters.

app.runMiddleware('/handler', {
  method: 'post',
  query: {
    token: 'tk-12345'
  },
  body: {
    "action": "list",
    "path": "/"
  }
}, (code, data) => {
  console.log(code, data);
  process.exit(0);
});

Auto pass cookies

When you runMiddleware from another location, you don't have to pass all the parameters of the current middleware to the handler.

app.get('/middleware1', (req, res) => {
  req.runMiddleware( /* ... */ );
})

Redirecting

You can check if the middleware executed will redirect the request by checking the code and the headers.location fields.

app.runMiddleware('/this-middleware-will-response-as-redirect', (code, body, headers) => {
  if (code === 301 || code === 302) { // Redirect HTTP codes
    console.log('Redirect to:', headers.location);
  }
});

Changelog

• v1.0.0 (25 June 2018) -
• v0.6.1 (9 Sep 2016) - Supports response.redirect
• v0.6.2 (10 Sep 2016) - Supports passing cookies and other variables to runMiddleware
• v0.6.3 (11 Sep 2016) - Supports running middleware from others middleware, for automatically passing cookies and headers between middlewares.
• v0.6.4 (13 Sep 2016) - Better documentation and examples

Examples

See the tests for further examples.

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