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from bs4 import BeautifulSoup
import requests
import re
import logging
from typing import Dict, List, Tuple
logging.basicConfig(
level=logging.INFO,
format='%(asctime)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)
def parse_article(html_content: str) -> Tuple[str, List[Dict]]:
soup = BeautifulSoup(html_content, "html.parser")
main_content_div = soup.find("div", id="main-content")
if not main_content_div:
return "", []
main_content_copy = main_content_div.__copy__()
for tag in main_content_copy.find_all(["div", "span"], class_=["article-metaline", "article-metaline-right", "f2", "push"]):
tag.decompose()
# 移除網址
text = main_content_copy.get_text(strip=True, separator="\n")
text = re.sub(r'https?://\S+', '', text)
pushes = soup.find_all("div", class_="push")
push_list = []
for push in pushes:
try:
tag = push.find("span", class_="push-tag").get_text(strip=True)
user_id = push.find("span", class_="push-userid").get_text(strip=True)
content = push.find("span", class_="push-content").get_text(strip=True).lstrip(": ")
time = push.find("span", class_="push-ipdatetime").get_text(strip=True)
push_list.append({
"tag": tag,
"user_id": user_id,
"content": content,
"time": time
})
except AttributeError as e:
logger.warning(f"解析推文時發生錯誤: {e}")
continue
return text, push_list
def main():
"""從網址讀取多篇文章，並顯示內文"""
import re
import time
import urllib
from multiprocessing import Pool
from requests_html import HTMLSession
def parse_article_entries(elements):
results = []
for element in elements:
try:
push = element.find('.nrec', first=True).text
mark = element.find('.mark', first=True).text
title = element.find('.title', first=True).text
author = element.find('.meta > .author', first=True).text
date = element.find('.meta > .date', first=True).text
link = element.find('.title > a', first=True).attrs['href']
# 使用正規表示式過濾合法 PTT 網址
if not re.match(r"^/bbs/\w+/M\.\d+\.A\.\w+\.html$", link):
continue
except AttributeError:
if '(本文已被刪除)' in title:
match_author = re.search('\[(\w*)\]', title)
if match_author:
author = match_author.group(1)
elif re.search('已被\w*刪除', title):
match_author = re.search('\<(\w*)\>', title)
if match_author:
author = match_author.group(1)
results.append({
'push': push,
'mark': mark,
'title': title,
'author': author,
'date': date,
'link': link
})
return results
def parse_next_link(controls):
link = controls[1].attrs['href']
return urllib.parse.urljoin('https://www.ptt.cc/', link)
def get_posts(post_links):
with Pool(processes=8) as pool:
responses = pool.map(session.get, post_links)
return responses
session = HTMLSession()
session.cookies.set('over18', '1')
url = 'https://www.ptt.cc/bbs/LoL/index.html'
num_page = 10
post_links = []
for _ in range(num_page):
response = session.get(url)
metadata = parse_article_entries(elements=response.html.find('div.r-ent'))
next_page_url = parse_next_link(controls=response.html.find('.action-bar a.btn.wide'))
post_links += [urllib.parse.urljoin(url, meta['link']) for meta in metadata]
url = next_page_url
start_time = time.time()
results = get_posts(post_links)
print(f'共 {len(results)} 篇文章，花費: {time.time() - start_time:.2f} 秒\n')
txt_file = "ptt.txt"
for i, res in enumerate(results):
main_text, _ = parse_article(res.text)
# print(f'--- 第 {i+1} 篇文章 ---')
# print(main_text)
# print('\n')
# write to text file
with open(txt_file, "a", encoding="utf-8") as f:
f.write(main_text + "\n\n")
print(f"文章已寫入 {txt_file}")
if __name__ == "__main__":
main()
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