215 lines
6.2 KiB
Python
215 lines
6.2 KiB
Python
#!/usr/bin/env python
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# coding: utf-8
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import os, time, re
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import contextlib
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import sys
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import requests
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import threading
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from bs4 import BeautifulSoup, Comment
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from .tomd import Tomd
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def result_file(folder_username, file_name, folder_name):
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folder = os.path.join(os.path.dirname(os.path.realpath(__file__)), "..", folder_name, folder_username)
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if not os.path.exists(folder):
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os.makedirs(folder)
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path = os.path.join(folder, file_name)
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file = open(path,"w")
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file.close()
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else:
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path = os.path.join(folder, file_name)
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return path
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def delete_ele(soup:BeautifulSoup, tags:list):
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for ele in tags:
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for useless_tag in soup.select(ele):
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useless_tag.decompose()
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def delete_ele_attr(soup:BeautifulSoup, attrs:list):
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for attr in attrs:
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for useless_attr in soup.find_all():
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del useless_attr[attr]
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def delete_blank_ele(soup:BeautifulSoup, eles_except:list):
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for useless_attr in soup.find_all():
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try:
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if useless_attr.name not in eles_except and useless_attr.text == "":
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useless_attr.decompose()
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except Exception:
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pass
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class TaskQueue(object):
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def __init__(self):
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self.VisitedList = []
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self.UnVisitedList = []
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def getVisitedList(self):
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return self.VisitedList
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def getUnVisitedList(self):
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return self.UnVisitedList
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def InsertVisitedList(self, url):
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if url not in self.VisitedList:
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self.VisitedList.append(url)
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def InsertUnVisitedList(self, url):
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if url not in self.UnVisitedList:
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self.UnVisitedList.append(url)
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def RemoveVisitedList(self, url):
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self.VisitedList.remove(url)
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def PopUnVisitedList(self,index=0):
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url = []
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if index and self.UnVisitedList:
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url = self.UnVisitedList[index]
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del self.UnVisitedList[:index]
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elif self.UnVisitedList:
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url = self.UnVisitedList.pop()
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return url
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def getUnVisitedListLength(self):
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return len(self.UnVisitedList)
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class CSDN(object):
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def __init__(self, username, folder_name):
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self.headers = {
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"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.70 Safari/537.36"
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}
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self.username = username
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self.TaskQueue = TaskQueue()
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self.folder_name = folder_name
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self.url_num = 1
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def start(self):
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num = 0
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while True:
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num += 1
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url = u'https://blog.csdn.net/' + self.username + '/article/list/' + str(num)
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response = requests.get(url=url, headers=self.headers)
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html = response.text
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soup = BeautifulSoup(html, "html.parser")
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articles = soup.find_all('div', attrs={"class":"article-item-box csdn-tracking-statistics"})
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if len(articles) > 0:
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for article in articles:
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article_title = article.a.text.strip().replace(' ','：')
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article_href = article.a['href']
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with ensure_memory(sys.getsizeof(self.TaskQueue.UnVisitedList)):
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self.TaskQueue.InsertUnVisitedList([article_title, article_href])
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else:
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break
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def get_md(self, url):
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response = requests.get(url=url, headers=self.headers)
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html = response.text
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soup = BeautifulSoup(html, 'lxml')
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content = soup.select_one("#content_views")
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# 删除注释
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for useless_tag in content(text=lambda text: isinstance(text, Comment)):
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useless_tag.extract()
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# 删除无用标签
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tags = ["svg", "ul", ".hljs-button.signin"]
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delete_ele(content, tags)
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# 删除标签属性
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attrs = ["class", "name", "id", "onclick", "style", "data-token", "rel"]
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delete_ele_attr(content,attrs)
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# 删除空白标签
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eles_except = ["img", "br", "hr"]
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delete_blank_ele(content, eles_except)
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# 转换为markdown
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md = Tomd(str(content)).markdown
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return md
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def write_readme(self):
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print("+"*100)
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print("[++] 开始爬取 {} 的博文 ......".format(self.username))
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print("+"*100)
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reademe_path = result_file(self.username,file_name="README.md",folder_name=self.folder_name)
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with open(reademe_path,'w', encoding='utf-8') as reademe_file:
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readme_head = "# " + self.username + " 的博文\n"
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reademe_file.write(readme_head)
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for [article_title,article_href] in self.TaskQueue.UnVisitedList[::-1]:
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text = str(self.url_num) + '. [' + article_title + ']('+ article_href +')\n'
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reademe_file.write(text)
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self.url_num += 1
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self.url_num = 1
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def get_all_articles(self):
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try:
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while True:
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[article_title,article_href] = self.TaskQueue.PopUnVisitedList()
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try:
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file_name = re.sub(r'[\/:：*?"<>|]','-', article_title) + ".md"
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artical_path = result_file(folder_username=self.username, file_name=file_name, folder_name=self.folder_name)
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md_head = "# " + article_title + "\n"
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md = md_head + self.get_md(article_href)
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print("[++++] 正在处理URL：{}".format(article_href))
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with open(artical_path, "w", encoding="utf-8") as artical_file:
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artical_file.write(md)
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except Exception:
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print("[----] 处理URL异常：{}".format(article_href))
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self.url_num += 1
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except Exception:
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pass
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def muti_spider(self, thread_num):
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while True:
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if self.TaskQueue.getUnVisitedListLength() < 1:
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break
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thread_list = []
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for i in range(thread_num):
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th = threading.Thread(target=self.get_all_articles)
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thread_list.append(th)
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for th in thread_list:
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th.start()
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lock = threading.Lock()
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total_mem= 1024 * 1024 * 500 #500MB spare memory
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@contextlib.contextmanager
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def ensure_memory(size):
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global total_mem
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while 1:
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with lock:
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if total_mem > size:
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total_mem-= size
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break
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time.sleep(5)
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yield
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with lock:
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total_mem += size
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def spider_user(username: str, thread_num: int = 10, folder_name: str = "articles"):
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if not os.path.exists(folder_name):
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os.makedirs(folder_name)
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csdn = CSDN(username,folder_name)
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csdn.start()
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th1 = threading.Thread(target=csdn.write_readme)
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th1.start()
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th2 = threading.Thread(target=csdn.muti_spider, args=(thread_num,))
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th2.start()
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def spider(usernames: list, thread_num: int = 10, folder_name: str = "articles"):
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for username in usernames:
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try:
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user_thread = threading.Thread(target=spider_user,args=(username, thread_num, folder_name))
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user_thread.start()
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print("[++] 开启爬取 {} 博文进程成功 ......".format(username))
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except Exception:
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print("[--] 开启爬取 {} 博文进程出现异常 ......".format(username))
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if __name__ == "__main__":
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spider(["ds19991999"])
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