Error in connecting to a proxy address for a Heroku add-on

Hello,

I am looking to try to connect to a SQL database via a Heroku app, but the database restricts IP addresses, and due to the nature of Heroku’s reliance on an EC2 instance with changing IP addresses, I need to use a proxy. I looked through the comments on this issue in mysql, and I used the configuration in one of the last comments. I’m repeating it here, but it was originally posted by @pierrickchabi 2 years ago:

var mysql2 = require('mysql2');
var url = require("url");
var SocksConnection = require('socksjs');

var mysql_server_options = {
  host: 'database.ho.st',
  port: 3306
};

var socks_options = {
  host: 'proxy.ho.st',
  port: 1080,
  user: 'proxy_username',
  pass: 'proxy_password'
};

var socksConn = new SocksConnection(mysql_server_options, socks_options);

var mysql_options =  {
  database: 'db_name',
  user: 'db_username',
  password: 'secret',
  stream: socksConn
}

var mysqlConn = mysql2.createConnection(mysql_options);

mysqlConn.query('SELECT 1+1 as test1;', function(err, rows, fields) {
  if (err) throw err;

  console.log('Result: ', rows);

  socksConn.dispose();
  mysqlConn.end();
});

However, the error I get is:

TypeError: this.stream.destroy is not a function
at Connection._handleTimeoutError (/app/node_mudules/mysql2/lib/connection.js:164:17)
at tryOnTimeout (timers.js:224:198:5)
at Timer.listOnTimeout (timers.js:198:5)
...

I am not sure what the issue is, but it seems as if the connection is timing out. Any thoughts or help you can provide?

[mm-wang]

Okay, I’ve finally fixed the connection. There was something going on with the socket callback, but I am all set now. Thanks for all the help in troubleshooting and the suggestion of a new socks client!

[sidorares]

Can’t see any mention of destroy here https://nodejs.org/api/stream.html - probably we should remove it