CROS in Node

This post how to enable CORS in Node. CORS means cross-domain requests.

Simply using below line of code in the application respond level will solve CORS issue.

res.header("Access-Control-Allow-Origin", "*");

By below lines enable CORS for all the routes in that server.

app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

you can add this for resources files as well.

app.get('/test', function(req, res){
  var file = __dirname + '/MyFile.zip';
  res.download(file); // Set disposition and send it.
});

Here is sample full code.

var express = require('express');

var app = express();
app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

app.get('/', function (req, res) {
  var data = {
    "Fruits": [
      "apple",
      "orange"    ]
  };

  res.json(data);
});

app.get('/test', function(req, res){
  var file = __dirname + '/ZipFile.zip';
  res.download(file); // Set disposition and send it.
});