143 lines
5.1 KiB
Python
143 lines
5.1 KiB
Python
import re
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import requests
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from bs4 import BeautifulSoup
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from pandas.io.html import read_html
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class WikiSpider:
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def __init__(self, config):
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self.proxy_config = config["PROXY"]
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self.wiki_base_url = "https://en.wikipedia.org"
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self.wiki_url = self.wiki_base_url + "/wiki/"
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def search_by_chinese(self, keyword):
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url = self.get_wiki_url(keyword)
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return self.get_web_content(url)
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def get_web_content(self, url) -> dict:
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r = requests.get(url, proxies=self.get_proxy())
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return self.process_body(r.text)
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def process_body(self, body: str) -> dict:
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r = {}
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soup = BeautifulSoup(body, features="lxml")
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title = self.get_title(soup)
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info = self.get_info(body)
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img_urls = self.get_image(soup)
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info["imgs"] = img_urls
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r[title] = info
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return r
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def get_title(self, soup: BeautifulSoup):
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head = soup.find("h1", {"id": "firstHeading"})
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if head is None:
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return None
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return head.text
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def get_info(self, body) -> dict:
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"""
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:param body: html content
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:return: dictionary contains property retrieved from wikipedia infobox
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"""
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info_dict = {}
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try:
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info_boxes = read_html(str(body), index_col=0, attrs={"class": "infobox"})
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except ValueError as e:
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return info_dict
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tmp_dict = info_boxes[0].to_dict()
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for k, v in tmp_dict.items():
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info_dict = v
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break # tmp_dict only has one key
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# todo：translate to simplified Chinese
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# remove cite chars and \xa0
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info_dict = {
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self.strip_info_key(str(k)): self.strip_info_value(str(v)) for
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k, v in
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info_dict.items() if
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k != v and str(k).lower() != "nan" and str(v).lower() != "nan"}
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return info_dict
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def get_image(self, soup: BeautifulSoup) -> list[str]:
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img_urls = []
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# soup = BeautifulSoup(body, features="lxml")
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thumbs = soup.findAll("img", {"class": "thumbimage"})
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for thumb in thumbs:
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img_page_url = self.wiki_base_url + thumb.parent["href"]
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img_page = requests.get(img_page_url, proxies=self.get_proxy())
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img_page_body = img_page.text
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s = BeautifulSoup(img_page_body, features="lxml")
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full_media_div = s.findAll("div", {"class": "fullMedia"})[0]
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img_url = "https:" + full_media_div.findAll("a", {"class": "internal"})[0]["href"]
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img_urls.append(img_url)
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return img_urls
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def get_lists(self, lists_of_lists_url: str) -> set[str]:
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"""
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get lists from a wikipedia lists_of_lists page
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:param lists_of_lists_url: page url
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:return: set of lists
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"""
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r = requests.get(lists_of_lists_url, proxies=self.get_proxy())
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body = r.text
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soup = BeautifulSoup(body, features="lxml")
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links = soup.findAll("a", {"title": re.compile(r"^List of[\s\S]*$")})
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list_link_set = {self.wiki_base_url + link["href"] for link in links}
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return list_link_set
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def get_links_from_list(self, list_url: str) -> set[str]:
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"""
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get all related links in wikipedia list page
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:param list_url: page url
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:return: set of related links
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"""
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r = requests.get(list_url, proxies=self.get_proxy())
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body = r.text
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soup = BeautifulSoup(body, features="lxml")
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possible_area = soup.findAll("div", {"class": "mw-parser-output"})
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if len(possible_area) == 0:
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return set()
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area = possible_area[0]
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links = area.findAll("a", {"href": re.compile(r"^(/wiki/)[\s\S]*$")})
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link_set = {self.wiki_base_url + link["href"] for link in links if self.is_content_page(link["href"])}
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return link_set
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def get_wiki_url(self, keyword: str) -> str:
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return self.wiki_url + keyword
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def is_content_page(self, url: str) -> bool:
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return not (":" in url or
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url.startswith("/wiki/List_of") or
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url.startswith("/wiki/Lists_of"))
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def strip_info_key(self, info: str) -> str:
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r = re.sub(r'\[(\d)*\]', "", info.replace("\xa0", "")
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.replace("\ufeff", "")
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)
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return r
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def strip_info_value(self, info: str) -> str:
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r = re.sub(r'\[(\d)*\]', "", info.replace("\xa0", "").replace("\ufeff", "")
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.replace(".mw-parser-output", "")
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.replace(".geo-default", "")
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.replace(".geo-dms", "")
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.replace(".geo-nondefault", "")
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.replace(".longitude", "")
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.replace(".latitude", "")
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.replace(".geo-dec", "")
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.replace(".geo-multi-punct", "")
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.replace("{display:inline}", "")
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.replace("{display:none}", "")
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.replace("{white-space:nowrap}", "")
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)
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return r.strip().lstrip(",")
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def get_proxy(self) -> dict:
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return {
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'http': self.proxy_config["url"],
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'https': self.proxy_config["url"],
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}
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