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    <title>Getting web visits data for analytics with Javascript, Python and GeoIP</title>


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    <meta name="description" content="Requirements % apt-get install -y geoip-database % pip install python-dateutil pygeoip Browser data We are going to parse the navigator data to obtain...">
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  <h1><a href="/web-visits-data-analytics-javascript-python--geoip">Getting web visits data for analytics with Javascript, Python and GeoIP</a></h1>
  <time datetime="2015-02-11">Feb 11, 2015</time>

  <a class="tag" href="/tags?tag=data-processing">data-processing</a>

  <a class="tag" href="/tags?tag=geoip">geoip</a>

  <a class="tag" href="/tags?tag=javascript">javascript</a>

  <a class="tag" href="/tags?tag=python">python</a>

  <a class="tag" href="/tags?tag=web-analytics">web-analytics</a>

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    <h2>Requirements</h2>

<pre>
% apt-get install -y geoip-database
% pip install python-dateutil pygeoip
</pre>

<h2>Browser data</h2>

<p>We are going to parse the navigator data to obtain the language, browser, operative system, screen resolution, density of pixels of the screen and a boolean to define if the user is using a touch device. This data will be POSTed to be analyzed and stored (in this example in the path <code>'/analytics'</code>).</p>

<p>The Javascript code:</p>

<pre>
var data, ua, platform, browser, os;

data = {
    page: window.location.pathname.replace(/\/$/, ''),
    language: navigator.language.slice(0, 2).toUpperCase(),
    screen_resolution: window.screen.width + 'x' + window.screen.height,
    screen_dpi: window.devicePixelRatio,
    is_touch_device: 'ontouchstart' in window || 'onmsgesturechange' in window
};
ua = navigator.userAgent.toLowerCase();
platform = navigator.platform.toLowerCase();

browser = ua.match(/(opera|chrome|safari|firefox|msie|trident)\/?\s*([\d\.]+)/) || [];
if (/trident/.test(browser[1])) browser = 'ie';
else if (browser[2]) browser = browser[1];
else if (! browser.length) browser = 'other';
if (browser == 'msie') browser = 'ie';
data.browser = browser.toLowerCase();

if (ua.match(/android/)) os = 'android';
else if (ua.match(/(iphone|ipod|ipad)/)) os = 'ios';
else if (ua.match(/windows phone/)) os = 'windows-phone';
else if (ua.match(/blackberry/)) os = 'blackberry';
else if (platform.match(/mac/)) os = 'mac';
else if (platform.match(/win/)) os = 'windows';
else if (platform.match(/linux/)) os = 'linux';
else os = 'other';
data.os = os;

$.ajax({
    url: '/analytics',
    data: JSON.stringify(data),
    type: 'POST'
});
</pre>

<h2>Server-side geo data</h2>

<p>I'm going to use <a href="http://www.tornadoweb.org/" target="_blank">Tornado</a> and <a href="http://cassandra.apache.org/" target="_blank">Cassandra</a>, the code is pretty straightforward so you can easily extrapolate it to your preferences (let's say Django and PostgreSQL, as an example).</p>

<p>You will need to download the <a href="http://dev.maxmind.com/geoip/geoip2/geolite2/" target="_blank">GeoLite City database</a> in your application data root (defined as <code>settings.DATA_ROOT</code>).</p>

<p>The Python code:</p>

<pre>
import os
import json

from tornado.web import RequestHandler

from pygeoip import GeoIP
import dateutil.parser

from app.models import Visit
from app import settings


class VisitController(RequestHandler):

    def post(self):
        self.set_status(204)
        data = json.loads(self.request.body)

        ip = self.request.remote_ip
        if ip:
            data['ip'] = ip
        else:
            return self.finish()

        geo_db = GeoIP(os.path.join(settings.DATA_ROOT, 'GeoLiteCity.dat'))
        try:
            city = geo_db.record_by_addr(ip)
        except:
            return self.finish()
        else:
            data.update({'city': city['city'],
                         'country_code': city['country_code'],
                         'country_name': city['country_name'],
                         'continent': city['continent']})

        data['date'] = dateutil.parser.parse(data['date'])

        try:
            Visit.create(**data)
        except:
            pass

        return self.finish()
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