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browser.py
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browser.py
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#!/usr/bin/env python
#
# vim:ts=4:sw=4:expandtab
######################################################################
"""Worker task: does the actual browsing work."""
import gtk
import sys
import pywebkitgtk as webkit
import random
from datetime import datetime
from datetime import timedelta
import time
import os
import getopt
import argparse
import uuid
import logging
from collections import deque
from logging import *
import gobject
import signal
class TimeoutException(Exception):
pass
def randstr(l = 32):
return "".join(["%.2x" % random.randint(0, 0xFF) for i in range(l/2)])
class DOMWalker:
def __init__(self, branch_factor):
self.__indent = 0
self.branch_factor = branch_factor
self.child_urls = []
def __dump(self, node):
i = 0
#print >> sys.stderr, " "*self.__indent, node.__class__.__name__
if node.nodeName == "A" and self.branch_factor > 0:
#print >> sys.stderr, " "*self.__indent, node.__class__.__name__
if node.hasAttribute("href") and node.__getattribute__("href").find("http") != -1:
#print >> sys.stderr, " "*self.__indent, node.__getattribute__("href")
urlval = node.__getattribute__("href")
self.child_urls.append(urlval)
#print >> sys.stderr, " "*self.__indent, "http://safly-beta.dyndns.org/?q="+node.__getattribute__("href")
#print >> sys.stderr, " "*self.__indent, node.nodeName
self.branch_factor -= 1
def walk_node(self, node, callback = None, *args, **kwargs):
if callback is None:
callback = self.__dump
callback(node, *args, **kwargs)
self.__indent += 1
children = node.childNodes
for i in range(children.length):
child = children.item(i)
self.walk_node(child, callback, *args, **kwargs)
self.__indent -= 1
class Browser():
def __init__(self, branch_factor=0):
self.branch_factor = branch_factor
self.__bid = randstr(16)
self.__webkit = webkit.WebView()
self.__webkit.SetDocumentLoadedCallback(self._DOM_ready)
self.result = None
self.tid = None
self.timed_out = None
info("Spawned new browser " + str(self.__bid))
def __del__(self):
pass
def __timeout_callback(self):
debug("Timeout Callback")
if gtk.main_level() > 0:
gtk.mainquit()
# Set a flag so that the main thread knows to raise a
# TimeoutException.
self.timed_out = True
# CAUTION: don't raise a TimeoutException here as we are in GTK
# thread context. An exception raised here will not be seen by
# the primary thread.
# Don't do this: raise TimeoutException
#if loading a page taked more than timeout miliseconds
#visit will timout. Default timeout value is 5000
def visit(self, url, timeout=5):
info("Visiting URL: " + url)
timeout_ms = timeout*1000
self.timed_out = False
self.tid = gobject.timeout_add(timeout_ms, self.__timeout_callback)
self.pageLoaded = False
self.walker = DOMWalker(self.branch_factor)
self.__webkit.LoadDocument(url)
gtk.main()
# Disable the timeout since it is now clear that the page
# loaded.
if self.tid:
gobject.source_remove(self.tid)
self.tid = None
if self.timed_out:
raise TimeoutException
else:
return self.result[0], self.result[1], self.result[2], self.walker.child_urls
def url(self):
window = self.__webkit.GetDomWindow()
return window.location.href
def _DOM_node_inserted(self, event):
target = event.target
# target can be: Element, Attr, Text, Comment, CDATASection,
# DocumentType, EntityReference, ProcessingInstruction
parent = event.relatedNode
#print >> sys.stderr, "NODE INSERTED", target, parent
def _DOM_node_removed(self, event):
target = event.target
# target can be: Element, Attr, Text, Comment, CDATASection,
# DocumentType, EntityReference, ProcessingInstruction
parent = event.relatedNode
#print >> sys.stderr, "NODE REMOVED", target, parent
def _DOM_node_attr_modified(self, event):
target = event.target
# target can be: Element
name = event.attrName
change = event.attrChange
newval = event.newValue
oldval = event.prevValue
parent = event.relatedNode
#print >> sys.stderr, "NODE ATTR MODIFIED", target, name, change, newval, oldval, parent
def _DOM_node_data_modified(self, event):
target = event.target
# target can be: Text, Comment, CDATASection, ProcessingInstruction
parent = event.target.parentElement
newval = event.newValue
oldval = event.prevValue
#print >> sys.stderr, "NODE DATA MODIFIED", target, newval, oldval, parent
#print >> sys.stderr, dir(target)
#print >> event.target.getElementsByTagName('div').nodeName
#print >> event.target.attributes[0].nodeName
node=event.target.parentElement
#print target.textContent
#print target.parentElement.attributes.length
if node.attributes:
for i in range(node.attributes.length):
attribute = node.attributes.item(i)
attrName = attribute.nodeName
attrValue = attribute.nodeValue
#print attrName, "-->", attrValue
if attrName == "name" and attrValue == "is_loaded":
#print node.innerHTML;
#print target.textContent
if node.innerHTML == "1":
self._is_Page_Loaded()
#print dir(event.target)
def _DOM_ready(self):
document = self.__webkit.GetDomDocument()
window = self.__webkit.GetDomWindow()
document.addEventListener('DOMNodeInserted', self._DOM_node_inserted,
False)
document.addEventListener('DOMNodeRemoved', self._DOM_node_removed,
False)
document.addEventListener('DOMAttrModified', self._DOM_node_attr_modified,
False)
document.addEventListener('DOMCharacterDataModified', self._DOM_node_data_modified,
False)
#print >> sys.stderr, "URL:", document.URL
#print >> sys.stderr, "Title:", document.title
#print >> sys.stderr, "Cookies:", document.cookie
#print body, dir(body)
#print "INNER:", document.innerHTML
#print "OUTER:", body.outerHTML
#print dir(document)
#print str(document)
# Save results so that we can return it on visit() calls.
self.result = document.title, document.cookie, document.body.outerHTML
self.walker.walk_node(document)
# _DOM_ready may be called before we call gtk.main() -- see
# visit() -- in which case calling mainquit is invalid. We check
# for that here.
if gtk.main_level() > 0:
gtk.mainquit()
def _is_Page_Loaded(self):
debug("_is_Page_Loaded")
self.pageLoaded = True
gtk.mainquit()