Google Maps geocoder script, which needs throttled...

google-maps-geocoder.js

'use strict';

var https = require('https')
var url   = require('url');
var fmt   = require('util').format;

var addresses = require('./addresses.json').addresses.map(function (address) {
    return address.join(', ');
});

console.log(JSON.stringify(addresses, null, 4));

var api = require('./config/api/google-maps.json');
var uri = fmt('%s://%s%s', api.uri.scheme, api.uri.host, api.uri.path);
var absoluteUri = url.parse(uri)
absoluteUri.query = {key: api.key};

var lookups = [];
var lastStartTime = Date.now();
var timeDelay = 500; // Milliseconds (1000 in a sec)

addresses.forEach(function (address) {
    var buffer = '';
    var nextStartTime = lastStartTime + timeDelay;
    absoluteUri.query.address = address;

    while (Date.now() < nextStartTime) {
        // spin our wheels...
    }

    lastStartTime = Date.now();
    console.log((new Date).toISOString());

    https.get(url.format(absoluteUri), function (res) {
        res.on('data', function (chunk) {
            buffer += chunk;
        })
        res.on('end', function () {
            console.log((new Date).toISOString() + ': ' + JSON.parse(buffer).status);

            var qty = 1;
            var index = addresses.indexOf(address);

            lookups[index] = JSON.parse(buffer);
            lookups[index].address_query = address;

            if (lookups.length === addresses.length) {
                var dest = {geocodes: lookups};
                var json = JSON.stringify(dest, null, 4);
                console.log(json);
            }
        });
    }).on('error', function (err) {
        console.log('Error: ' + err.message);
    });
});