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wikipedia.py
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wikipedia.py
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#Crawl wikipedia starting from the homepage and log urls visited
from helpers import *
class Wikipedia:
def __init__(self):
self.root_page = 'https://en.wikipedia.org'
self.main_page = 'https://en.wikipedia.org/wiki/Main_Page'
self.bad_links = ['#mw-head', '#p-search']
self.driver = init_chrome_driver()
#self.current_html = get_html_page_static(self.main_page)
self.current_html = get_html_page(self.driver, 'wiki', self.root_page)
self.urls = []
self.all_urls = []
self.visited_urls = []
self.page_count = 0
def get_sublinks(self, html):
current_urls = []
for link in html.find_all('a'):
try:
url = link['href']
if url.startswith('/wiki/'):
url = self.root_page + url
elif url.startswith('//'):
url = self.root_page + '/wiki' + url
elif 'wikipedia.org' not in url:
continue
if url not in self.urls and url not in self.bad_links and not url.endswith('.jpeg') and not url.endswith('.jpg') and not url.startswith('/w/') and not url.startswith('#'):
current_urls.append(url)
self.urls.append(url)
self.page_count += 1
except:
pass
self.all_urls.append(current_urls)
return current_urls
def get_next_html_page(self, html):
current_urls = self.get_sublinks(html)
while True:
#No links on current page -> go to previous page
while len(current_urls) == 0:
current_urls = self.all_urls.pop(-1)
current_url = random.choice(current_urls)
try:
#next_html = get_html_page_static(current_url)
next_html = get_html_page(self.driver, 'wiki', current_url)
except:
current_urls.remove(current_url)
continue
self.visited_urls.append(current_url)
return current_url, next_html
def start_crawling(self):
html = self.current_html
while True:
current_path, html = self.get_next_html_page(html)
log = "Total pages: " + str(self.page_count) + " Path count: " + str(len(self.visited_urls)) + " " + current_path
print(log)
os.system('echo ' + log + ' >> wiki_logs')
if __name__ == "__main__":
wiki = Wikipedia()
wiki.start_crawling()