How can I support cors when using restify

Question

I have a REST api created with the restify module and I want to allow cross-origin resource sharing. What is the best way to do it?

Answer 1

You have to set the server up to set cross origin headers. Not sure if there is a built in use function or not, so I wrote my own.

server.use(
  function crossOrigin(req,res,next){
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "X-Requested-With");
    return next();
  }
);

I found this from this tutorial. http://backbonetutorials.com/nodejs-restify-mongodb-mongoose/

Answer 2

The latest version of Restify provides a plugin to handle CORS.

So you can now use it like this:

server.use(restify.CORS({

  // Defaults to ['*'].
  origins: ['https://foo.com', 'http://bar.com', 'http://baz.com:8081'], 

  // Defaults to false.
  credentials: true,

  // Sets expose-headers.
  headers: ['x-foo']   

}));

Answer 3

This works for me:

var restify = require('restify');

var server = restify.createServer();

server.use(restify.CORS());

server.opts(/.*/, function (req,res,next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Methods", req.header("Access-Control-Request-Method"));
    res.header("Access-Control-Allow-Headers", req.header("Access-Control-Request-Headers"));
    res.send(200);
    return next();
});

server.get('/test', function (req,res,next) {

    res.send({
        status: "ok"
    });
    return next();
});

server.listen(3000, function () {
    console.log('%s listening at %s', server.name, server.url);
});

Answer 4

This is what worked for me:

function unknownMethodHandler(req, res) {
  if (req.method.toLowerCase() === 'options') {
      console.log('received an options method request');
    var allowHeaders = ['Accept', 'Accept-Version', 'Content-Type', 'Api-Version', 'Origin', 'X-Requested-With']; // added Origin & X-Requested-With

    if (res.methods.indexOf('OPTIONS') === -1) res.methods.push('OPTIONS');

    res.header('Access-Control-Allow-Credentials', true);
    res.header('Access-Control-Allow-Headers', allowHeaders.join(', '));
    res.header('Access-Control-Allow-Methods', res.methods.join(', '));
    res.header('Access-Control-Allow-Origin', req.headers.origin);

    return res.send(204);
  }
  else
    return res.send(new restify.MethodNotAllowedError());
}

server.on('MethodNotAllowed', unknownMethodHandler);

I this code was taken from https://github.com/mcavage/node-restify/issues/284

Answer 5

CORS Plugin is deprecated in favor of https://github.com/Tabcorp/restify-cors-middleware. (Source: https://github.com/restify/node-restify/issues/1091.)

Below is a sample code regarding how to use

const corsMiddleware = require('restify-cors-middleware')

const cors = corsMiddleware({
  preflightMaxAge: 5, //Optional
  origins: ['http://api.myapp.com', 'http://web.myapp.com'],
  allowHeaders: ['API-Token'],
  exposeHeaders: ['API-Token-Expiry']
})

server.pre(cors.preflight)
server.use(cors.actual)

Answer 6

To enable CORS for basic authentication I did the following. It did not work until the .pre methods were used instead of the .use methods

server.pre(restify.CORS({
  origins: ['https://www.allowedip.com'],  // defaults to ['*']
  credentials: true,
  headers: ['X-Requested-With', 'Authorization']
}));
server.pre(restify.fullResponse());

function unknownMethodHandler(req, res) {
    if (req.method.toLowerCase() === 'options') {
      var allowHeaders = ['Accept', 'Accept-Version', 'Content-Type', 'Api-Version', 'Origin', 'X-Requested-With', 'Authorization']; // added Origin & X-Requested-With & **Authorization**

      if (res.methods.indexOf('OPTIONS') === -1) res.methods.push('OPTIONS');

      res.header('Access-Control-Allow-Credentials', true);
      res.header('Access-Control-Allow-Headers', allowHeaders.join(', '));
      res.header('Access-Control-Allow-Methods', res.methods.join(', '));
      res.header('Access-Control-Allow-Origin', req.headers.origin);

      return res.send(200);
   } else {
      return res.send(new restify.MethodNotAllowedError());
   }
}

server.on('MethodNotAllowed', unknownMethodHandler);

Answer 7

If anyone comes across this as of Feb 2018 there seems to be a bug that's been introduced, I couldn't get the restify-cors-middleware to work.

I'm using this work around for now:

server.pre((req, res, next) => {
   res.header("Access-Control-Allow-Origin", "*");
   next();
});

Answer 8

I do it like this on my restify base app:

//setup cors
restify.CORS.ALLOW_HEADERS.push('accept');
restify.CORS.ALLOW_HEADERS.push('sid');
restify.CORS.ALLOW_HEADERS.push('lang');
restify.CORS.ALLOW_HEADERS.push('origin');
restify.CORS.ALLOW_HEADERS.push('withcredentials');
restify.CORS.ALLOW_HEADERS.push('x-requested-with');
server.use(restify.CORS());

you need to use restify.CORS.ALLOW_HEADERS.push method to push the header u want into restify first, then using the CORS middleware to boot the CORS function.

Answer 9

MOST OF THE PREVIOUS ANSWERS ARE FROM 2013 AND USE DEPRECATED EXAMPLES! The solution (in 2017 at least) is as follows:

npm install restify-cors-middleware

Then in your server javascript file:

var corsMiddleware = require('restify-cors-middleware');

var cors = corsMiddleware({
  preflightMaxAge: 5,
  origins: ['*']
});

var server = restify.createServer();

server.pre(cors.preflight);
server.use(cors.actual);

And add whatever additional other options work for you. My use case was creating a localhost proxy to get around browser CORS issues during devolopment. FYI I am using restify as my server, but then my POST from the server (and to the server) is with Axios. My preference there.

npm listing for restify-cors-middleware

Answer 10

This sufficed in my case:

var server = restify.createServer();
server.use(restify.fullResponse());
server.get('/foo',  respond(req, res, next) {
   res.send('bar');
   next();
});

It wasn't necessary to server.use(restify.CORS()); Also, it appears server.use() calls must precede server.get() calls in order to work.

Answer 11

This worked for me with restify 7

server.pre((req, res, next) => {

    res.header('Access-Control-Allow-Origin', req.header('origin'));
    res.header('Access-Control-Allow-Headers', req.header('Access-Control-Request-Headers'));
    res.header('Access-Control-Allow-Credentials', 'true');
    // other headers go here..

    if(req.method === 'OPTIONS') // if is preflight(OPTIONS) then response status 204(NO CONTENT)
        return res.send(204);

    next();

});

Answer 12

I am using Restify 7.2.3 version and this code worked for me very well. You need to install the restify-cors-middleware plugin.

const corsMiddleware = require('restify-cors-middleware')

const cors = corsMiddleware({
    preflightMaxAge: 5, //Optional
    origins: ['http://ronnie.botsnbytes.com', 'http://web.myapp.com'],
    allowHeaders: ['API-Token'],
    exposeHeaders: ['API-Token-Expiry']
})

server.pre(cors.preflight)
server.use(cors.actual)

Answer 13

   const cors = require('cors');


   const server = restify.createServer();

   server.use(cors());

This worked for me

Answer 14

const restify = require('restify');
const corsMiddleware = require('restify-cors-middleware');

const cors = corsMiddleware({
  origins: ['*']
});

const server = restify.createServer();
server.pre(cors.preflight);
server.use(cors.actual);

server.get('/api/products', (request, response) => {
  response.json({ message: 'hello REST API' });
});

server.listen(3000, () => console.info(`port 3000`));

... is one brute-force solution, though you should be very careful doing that.