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crawlers.py
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crawlers.py
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"""
Module contains web crawler(s) with main purpose - grab dead links
"""
import requests
from crawlerhelpers import get_domain, get_links
class SimpleCrawler(object):
"""Simple Synchronous (Blocking) Crawler Class for parsing dead urls from web site and return them as list of strings
"""
def __init__(self, baseurl):
self.baseurl = baseurl
self.basedomain = get_domain(self.baseurl)
self.links = []
self.deadlinks = []
def get_page_links(self, url):
try:
r = requests.get(url)
r.raise_for_status()
except requests.exceptions.HTTPError as err:
self.deadlinks.append(url)
print("URL: '{}' added to deadlinks".format(url))
return None
except requests.exceptions.RequestException as e: # This is the correct syntax
print(e)
return None
return get_links(r.text, self.baseurl)
def crawler(self, url=None):
"""Recursive Blocking crawler"""
if not url:
url = self.baseurl
links = self.get_page_links(url)
if links:
for link in links:
if get_domain(link) == self.basedomain:
if link not in self.links:
self.links.append(link)
self.crawler(link)
def get_dead_links(self):
return self.deadlinks