Question

137

Node.js - listener must be a function error

rated 0 times [ 139] [ 2] / answers: 1 / hits: 25558 / 10 Years ago, sat, september 13, 2014, 12:00:00

I'm trying to convert the accepted answer on (How to create a simple http proxy in node.js?) from http to https.

When I try to access the proxy from my browser, the server quits and throws this error :

events.js:171

    throw TypeError('listener must be a function');

      ^

TypeError: listener must be a function

Here is my code :

var https = require('https');

var fs = require('fs');



var ssl = {

    ca: fs.readFileSync(cacert.pem),

    key: fs.readFileSync(key.pem),

    cert: fs.readFileSync(cert.pem)

};



https.createServer(ssl, onRequest).listen(3000, '127.0.0.1');



function onRequest(client_req, client_res) {



  console.log('serve: ' + client_req.url);



  var options = {

    hostname: 'www.example.com',

    port: 80,

    path: client_req.url,

    method: 'GET'

  };



  var ssl = {

    ca: fs.readFileSync(cacert.pem),

    key: fs.readFileSync(key.pem),

    cert: fs.readFileSync(cert.pem)

  };



  var proxy = https.request(ssl, options, function(res) {

    res.pipe(client_res, {

      end: true

    });

  });



  client_req.pipe(proxy, {

    end: true

  });

}

As you can see, I made very little changes and I'm not sure how to fix this.

Any ideas?

Answers

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leighrheac

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4 Years ago

answered 10 Years ago ignacio · Accepted Answer

Looks like you've got the arguments to https.request wrong (http://nodejs.org/api/https.html#https_https_request_options_callback). Should just be:

var proxy = https.request(options, function(res) {

   res.pipe(client_res, {

     end: true

   });

 });

Your certificate information should be included in the options object, from the linked page:

var options = {

  hostname: 'encrypted.google.com',

  port: 443,

  path: '/',

  method: 'GET',

  key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),

  cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')

};

options.agent = new https.Agent(options);



var req = https.request(options, function(res) {

  ...

}