mirror of https://github.com/Askill/optar.git
96 lines
2.7 KiB
Python
96 lines
2.7 KiB
Python
import json
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from time import sleep
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from urllib.parse import urljoin
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from lxml import html
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import requests
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import logging
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class Crawler:
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url = "" # the url of the website to be checked
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links = dict() # dic. with all sites and urls on those sites
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header_values = {
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'Connection:': 'Keep-alive',
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'name': 'Michael Foord',
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'location': 'Northampton',
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'language': 'English',
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'User-Agent': 'Mozilla 4/0'}
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exclude = [
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]
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def __init__(self, logger=None, exclude=None):
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if exclude:
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self.exclude += exclude
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if logger:
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self.logger = logger
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else:
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self.logger = logging.Logger(
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name="star_crawler", level=logging.INFO)
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def persist(self, path):
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with open(path, 'w') as fp:
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json.dump(self.links, fp)
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def load_site(self, path):
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with open(path, 'r') as fp:
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self.links = json.load(fp)
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def run(self, root, limit, sleep_time=0):
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self.url = root
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unchecked = [root]
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while unchecked and len(self.links) < limit:
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root = unchecked.pop()
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if root in self.links or self.url.rsplit('/')[2] not in root:
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continue
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if "https" not in root:
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continue
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clean = False
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for element in self.exclude:
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if element in root:
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clean = False
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break
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else:
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clean = True
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if not clean:
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continue
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self.logger.info(f"{len(self.links)} {root}")
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try:
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site = requests.get(root)
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tree = html.fromstring(site.content)
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links = tree.xpath('//a/@href')
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except:
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continue
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nlinks = []
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for link in links:
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if link not in nlinks:
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if link.startswith("http"):
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nlinks.append(link)
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else:
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nlinks.append(urljoin(site.url, link))
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unchecked += nlinks
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self.links[root] = nlinks
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sleep(sleep_time)
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def getNodesEdges(self):
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nodes = []
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edges = []
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for key, value in self.links.items():
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nodes.append(key)
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for edge in value:
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edges.append([key, edge])
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return nodes, edges
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def makeGraph(self, g):
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nodes, edges = self.getNodesEdges()
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for node in nodes:
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g.add_node(node)
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for f, t in edges:
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g.add_edge(f, t)
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