|
|
# ~*~ coding: utf-8 ~*~
|
|
|
__author__ = 'Kamo Petrosyan'
|
|
|
|
|
|
import urllib
|
|
|
from bs4 import BeautifulSoup
|
|
|
import urlparse
|
|
|
import mechanize
|
|
|
import pickle
|
|
|
import re
|
|
|
try:
|
|
|
import sys
|
|
|
import gevent
|
|
|
from gevent import monkey, pool
|
|
|
monkey.patch_all()
|
|
|
if 'threading' in sys.modules:
|
|
|
del sys.modules['threading']
|
|
|
print('threading module loaded before patching!\n')
|
|
|
print('threading module deleted from sys.modules!\n')
|
|
|
gevent_installed = True
|
|
|
except:
|
|
|
print("Gevent does not installed. Parsing process will be slower.")
|
|
|
gevent_installed = False
|
|
|
|
|
|
|
|
|
class Crawler:
|
|
|
def __init__(self, url, outputfile='sitemap.xml', logfile='error.log', oformat='xml'):
|
|
|
self.url = url
|
|
|
self.logfile = open(logfile, 'a')
|
|
|
self.oformat = oformat
|
|
|
self.outputfile = outputfile
|
|
|
|
|
|
# create lists for the urls in que and visited urls
|
|
|
self.urls = set([url])
|
|
|
self.visited = set([url])
|
|
|
self.exts = ['htm', 'php']
|
|
|
self.allowed_regex = '\.((?!htm)(?!php)\w+)$'
|
|
|
|
|
|
def set_exts(self, exts):
|
|
|
self.exts = exts
|
|
|
|
|
|
def allow_regex(self, regex=None):
|
|
|
if not regex is None:
|
|
|
self.allowed_regex = regex
|
|
|
else:
|
|
|
allowed_regex = ''
|
|
|
for ext in self.exts:
|
|
|
allowed_regex += '(!{})'.format(ext)
|
|
|
self.allowed_regex = '\.({}\w+)$'.format(allowed_regex)
|
|
|
|
|
|
def crawl(self, echo=False, pool_size=1):
|
|
|
self.echo = echo
|
|
|
self.regex = re.compile(self.allowed_regex)
|
|
|
if gevent_installed and pool_size > 1:
|
|
|
self.pool = pool.Pool(pool_size)
|
|
|
self.pool.spawn(self.parse_gevent)
|
|
|
self.pool.join()
|
|
|
else:
|
|
|
while len(self.urls) > 0:
|
|
|
self.parse()
|
|
|
if self.oformat == 'xml':
|
|
|
self.write_xml()
|
|
|
|
|
|
def parse_gevent(self):
|
|
|
self.parse()
|
|
|
while len(self.urls) > 0 and not self.pool.full():
|
|
|
self.pool.spawn(self.parse_gevent)
|
|
|
|
|
|
def parse(self):
|
|
|
if self.echo:
|
|
|
if not gevent_installed:
|
|
|
print('{} pages parsed :: {} pages in the queue'.format(len(self.visited), len(self.urls)))
|
|
|
else:
|
|
|
print('{} pages parsed :: {} parsing processes :: {} pages in the queue'.format(len(self.visited), len(self.pool), len(self.urls)))
|
|
|
|
|
|
# Set the startingpoint for the spider and initialize
|
|
|
# the a mechanize browser object
|
|
|
|
|
|
if not self.urls:
|
|
|
return
|
|
|
else:
|
|
|
url = self.urls.pop()
|
|
|
br = mechanize.Browser()
|
|
|
try:
|
|
|
response = br.open(url)
|
|
|
if response.code >= 400:
|
|
|
self.errlog("Error {} at url {}".format(response.code, url))
|
|
|
return
|
|
|
|
|
|
for link in br.links():
|
|
|
newurl = urlparse.urljoin(link.base_url, link.url)
|
|
|
#print newurl
|
|
|
if self.is_valid(newurl):
|
|
|
self.visited.update([newurl])
|
|
|
self.urls.update([newurl])
|
|
|
except Exception, e:
|
|
|
self.errlog(e.message)
|
|
|
|
|
|
br.close()
|
|
|
del(br)
|
|
|
|
|
|
|
|
|
|
|
|
def is_valid(self, url):
|
|
|
valid = False
|
|
|
if url in self.visited:
|
|
|
return False
|
|
|
if not self.url in url:
|
|
|
return False
|
|
|
if re.search(self.regex, url):
|
|
|
return False
|
|
|
return True
|
|
|
|
|
|
def errlog(self, msg):
|
|
|
self.logfile.write(msg)
|
|
|
self.logfile.write('\n')
|
|
|
|
|
|
def write_xml(self):
|
|
|
of = open(self.outputfile, 'w')
|
|
|
of.write('<?xml version="1.0" encoding="utf-8"?>\n')
|
|
|
of.write('<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">\n')
|
|
|
url_str = '<url><loc>{}</loc></url>\n'
|
|
|
while self.visited:
|
|
|
of.write(url_str.format(self.visited.pop()))
|
|
|
|
|
|
of.write('</urlset>')
|
|
|
of.close()
|