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mongodb setup for deployd on heroku

I am using deployd to prototype an applicaton. It's been great, really helped me focus on what matters for the prototype.

Today I reached the first milestone and decided to deploy it in heroku.

I had a small problem because deployd uses an object to config mongodb, but heroku provides only a URL to mongodb server... So here is the script I am using to run deployd on heroku:

var deployd = require('deployd');

// on heroku must use port from env
var port = process.env.PORT || 3000;

var url = require('url');
var db_url = url.parse(
    process.env.MONGOHQ_URL || "mongodb://:@localhost:27017/my_db_name");

var options = {
    port: port,
    db: {
        "host": db_url.hostname,
        "port": parseInt(db_url.port),
        "name": db_url.pathname.slice(1),
        "credentials": {
            "username": db_url.auth.split(':')[0],
            "password": db_url.auth.split(':')[1]

var server = deployd(options);

server.on('listening', function() {
  console.log("Server is listening on " + port);

server.on('error', function(err) {
  process.nextTick(function() { // Give the server a chance to return an error


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