node.js simple proxy server

Question

i'm trying to implement simple anonymous http proxy server in nodejs

var http = require('http'),
    request = require('request');
http.createServer(function(req,res){
    req.pipe(request(req.url)).pipe(res)
}).listen(8888)

i'm recieving the following error:

stream.js:94
      throw er; // Unhandled stream error in pipe.
            ^
Error: CERT_HAS_EXPIRED
    at SecurePair.<anonymous> (tls.js:1370:32)
    at SecurePair.EventEmitter.emit (events.js:92:17)
    at SecurePair.maybeInitFinished (tls.js:982:10)
    at CleartextStream.read [as _read] (tls.js:469:13)
    at CleartextStream.Readable.read (_stream_readable.js:320:10)
    at EncryptedStream.write [as _write] (tls.js:366:25)
    at doWrite (_stream_writable.js:226:10)
    at writeOrBuffer (_stream_writable.js:216:5)
    at EncryptedStream.Writable.write (_stream_writable.js:183:11)
    at write (_stream_readable.js:583:24)
    at flow (_stream_readable.js:592:7)
    at Socket.pipeOnReadable (_stream_readable.js:624:5)

Here is another error:

events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: Invalid protocol

Any suggestions?

Community · Accepted Answer · 2017-05-23 12:20:53Z

3

req.url is a relative path, not a full url. It means that you should add protocol and domain name to it:

req.pipe(request('http://mydomain.com'+req.url)).pipe(res)

You're also forgetting about req.method and req.headers:

req.pipe(request({
  url: 'http://mydomain.com'+req.url,
  method: req.method,
  headers: req.headers
})).pipe(res)

If your purpose is to use it as a real proxy server, then I would recommend you to look at node-http-proxy - it's a perfect node.js proxy server implementation.

If you just want to learn node.js, then look at this article with example proxy server implementation. Author of the article is using build-in http module to send request instead of more powerful request module and not using piping, but the rest of the article looks fine.

As for you first problem, Piotr Tomasik's answer should help you.

edited May 23, 2017 at 12:20

CommunityBot

11 silver badge

answered Apr 6, 2014 at 10:11

Leonid Beschastny

51.6k10 gold badges121 silver badges126 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Piotr Tomasik · Accepted Answer · 2014-04-06 09:46:41Z

1

Looks like the domain you are hitting has an expired cert.

Add this to the top of your file.

process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';

As for your second error, make sure that the url includes the protocol. http https

answered Apr 6, 2014 at 9:46

Piotr Tomasik

9,2045 gold badges47 silver badges58 bronze badges

Collectives™ on Stack Overflow

node.js simple proxy server

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related