Node.js - listener必须是函数错误

Question

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?

Answer 1

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) {
  ...
}

Answer 2

我通过将函数名称作为参数传递而不是保存函数的变量来解决此错误