Toolserver:Python/Click tracker
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This simple click tracking script is intended to demonstrate use of Python WSGI.
Advanced users may wish to try using environ.get('PATH_INFO') instead of standard cgi parameters.
#!/usr/bin/env python
# click.py written by Dispenser 2010
# Released into the public domain
import cgi, time
def main(environ, start_response):
# environ is equivalent to "os" module
form = cgi.FieldStorage(environ['wsgi.input'], # File upload/POST data
environ=environ, # Environment variables (QUERY_STRING)
keep_blank_values=0) # Discard "&empty="
button = form.getfirst('button', '')
usergroup = form.getfirst('usergroup', '')
agent = environ.get('HTTP_USER_AGENT', '') # which browser
# We do it the simple way without much pre-processing, and just use files
if button and usergroup: # "validate input"
f = open( time.strftime('./clicktrack/%Y%m%d.log'), 'a')
f.write('\t'.join( (usergroup, button, agent, time.strftime("%H:%M:%S\n"),) ))
f.close()
# HTTP 204: acknowledged with a blank document
# Set the expiration in the past so the browser doesn't cache the request
start_response('204 No content', [("Pragma","no-cache"), ("Expires","Fri, 01 Jan 1990 00:00:00 GMT"), ("Cache-Control","no-cache, must-revalidate")])
return ['']
if __name__ == "__main__":
from flup.server.fcgi import WSGIServer
WSGIServer(main).run()
JavaScript to track events without an AJAX object or iframe.
var trackerUrl = "/bin/click.py";
var UserGroup = "editor";
function addClickTrackingEvents(){
var a = document.getElementsByTagName('A');
for(var i=0; a[i]!=null; i++){
if(a[i].id){ // Only report on links with IDs
a[i].onmousedown = function(){
// This is a sneaky of adding the tracking without using an HTTP redirect.
// It works by loading an image thus sending the URL.
// We don't care what it sends back, but to be safe it's blank
if(document.images){
(new Image).src=[trackerUrl,'?button=',this.id,'&usergroup=',UserGroup].join("");
return true;
}
}
}
}
}
// Run addClickTrackingEvents() after the document has loaded
window.onload = addClickTrackingEvents;