wait for web page to load completely using python

Question

Hi , Is there any way that I can find out using webbrowser or anyother package in Python if a browser window that I've opened has loaded completely or not? Once it's loaded completely I want to take a screenshot of it and save it.

Answer 1

Strictly speaking you can't do that with python. However, using Javascript you can wait for the "onload" event and send an ajax request to your python backend. With JQuery it should be something like.

//callback for the onload
jQuery(document)
        .ready(function() {

$.ajax({
   type: "POST",
   url: "thePythonScript.py",
   data: "name=Daniel&location=Somewhere",
   success: function(msg){
     alert( "Data Saved: " + msg );
   }
 });

});

Answer 2

You can do this using e.g. Selenium; I'm not sure if it's what you want, though. See this short guide.

#!/usr/bin/env python

from selenium import selenium

sel = selenium('localhost', 4444, '*firefox', 'http://www.google.com/')
sel.start()
sel.open('/')
sel.wait_for_page_to_load(10000)
sel.stop()

You could also use COM hooks to control IE (ugh):

import win32com.client
import time

ie = win32com.client.Dispatch( "InternetExplorer.Application" )
ie.Navigate( <some URL> )
time.sleep( 1 )
print( ie.Busy )

There's a module that wraps all the COM functionality: IEC.py.