Repositorio del curso CCOM4030 el semestre B91 del proyecto kilometro0
luis d198970c71 added browser platform 5 years ago
..
HISTORY.md added browser platform 5 years ago
LICENSE added browser platform 5 years ago
README.md added browser platform 5 years ago
index.js added browser platform 5 years ago
package.json added browser platform 5 years ago

README.md

on-headers

NPM Version NPM Downloads Node.js Version Build Status Test Coverage

Execute a listener when a response is about to write headers.

Installation

This is a Node.js module available through the npm registry. Installation is done using the npm install command:

$ npm install on-headers

API

var onHeaders = require('on-headers')

onHeaders(res, listener)

This will add the listener listener to fire when headers are emitted for res. The listener is passed the response object as it’s context (this). Headers are considered to be emitted only once, right before they are sent to the client.

When this is called multiple times on the same res, the listeners are fired in the reverse order they were added.

Examples

var http = require('http')
var onHeaders = require('on-headers')

http
  .createServer(onRequest)
  .listen(3000)

function addPoweredBy () {
  // set if not set by end of request
  if (!this.getHeader('X-Powered-By')) {
    this.setHeader('X-Powered-By', 'Node.js')
  }
}

function onRequest (req, res) {
  onHeaders(res, addPoweredBy)

  res.setHeader('Content-Type', 'text/plain')
  res.end('hello!')
}

Testing

$ npm test

License

MIT