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tieba.py
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288 lines (250 loc) · 11.1 KB
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# -*- coding： utf-8 -*-
# 按贴吧帖子 ID 顺序爬取纯文本数据， 每个帖子保存为一个 ID_帖子标题.txt 文件
# ./ID.txt 存放从哪个 ID 开始爬，不存在则ID默认为 5000000000
import re
import os
import time
import multiprocessing
import urllib.request
import random
import logging
import pymongo
from bs4 import BeautifulSoup
client = pymongo.MongoClient('mongodb')
db = client['baidu']
col = db['tieba']
UA_LIST = [
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/22.0.1207.1 Safari/537.1",
"Mozilla/5.0 (X11; CrOS i686 2268.111.0) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11",
"Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1090.0 Safari/536.6",
"Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/19.77.34.5 Safari/537.1",
"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.9 Safari/536.5",
"Mozilla/5.0 (Windows NT 6.0) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.36 Safari/536.5",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3",
"Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_0) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3",
"Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1062.0 Safari/536.3",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1062.0 Safari/536.3",
"Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.1 Safari/536.3",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.1 Safari/536.3",
"Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.1 Safari/536.3",
"Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.0 Safari/536.3",
"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.24 (KHTML, like Gecko) Chrome/19.0.1055.1 Safari/535.24",
"Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/535.24 (KHTML, like Gecko) Chrome/19.0.1055.1 Safari/535.24"
]
# 多进程锁
m_lock = multiprocessing.Lock()
# ua = UserAgent()
def get_title(html):
try:
soup = BeautifulSoup(html, 'lxml')
raw_title = soup.find('h1')
if not raw_title:
raw_title = soup.find('h3')
if not raw_title:
raw_title = re.findall('很抱歉，该贴已被删除。', html)
if raw_title:
raw_title = raw_title[0]
if not raw_title:
raw_title = re.findall('该吧被合并您所访问的贴子无法显示', html)
if raw_title:
raw_title = raw_title[0]
if not raw_title:
raw_title = re.findall('抱歉，您访问的贴子被隐藏，暂时无法访问。', html)
if raw_title:
raw_title = raw_title[0]
if not raw_title:
return ''
title = remove_html_tag(str(raw_title))
return title
except Exception as e:
logging.warning('Get title: {}'.format(e))
return ''
def get_posts_num(html):
try:
soup = BeautifulSoup(html, 'lxml')
raw_posts_num = soup.find('ul', {'class': 'l_posts_num'})
match = re.findall('pn=[0-9]+', str(raw_posts_num))
if match:
last_num_url = match.pop()
last_num = re.findall('[0-9]+', str(last_num_url))
return int(last_num[0])
else:
return 1
except Exception as e:
logging.warning('Get posts num: '.format(e))
return 1
# 暂时不需要
def get_floor(content):
c_content = '<html><body>' + str(content) + '</html></body>'
try:
soup = BeautifulSoup(c_content, 'lxml')
raw_floor = soup.findAll('span', {'class': 'tail-info'})
f_floor = re.findall('[0-9]+楼', str(raw_floor))
if f_floor:
floor = remove_html_tag(str(f_floor[0]))
return str(floor)
else:
return ''
except Exception as e:
logging.warning('Get floor: {}'.format(e))
return ''
def get_whole_page_content(html):
try:
soup = BeautifulSoup(html, 'lxml')
raw_posts_content = soup.findAll('div', {'class': ['d_post_content_main']})
content = ''
for post_content in raw_posts_content:
each_content = get_content(post_content)
if each_content:
content = content + each_content + '\n\n'
return content
except Exception as e:
logging.warning('Get whole page content: {}'.format(e))
return ''
def get_content(text):
c_text = '<html><body>' + str(text) + '</html></body>'
try:
soup = BeautifulSoup(c_text, 'lxml')
raw_content = soup.find('div', {'class': 'd_post_content'})
content = re.findall('\S.+', remove_html_tag(str(raw_content)))
if content:
return str(content[0])
else:
return ''
except Exception as e:
logging.warning('Get content: {}'.format(e))
return ''
def save_content(path, content):
try:
with open(path, 'w', encoding='utf-8') as fw:
fw.write(content)
except Exception as e:
logging.warning('Save content: {}'.format(e))
def remove_html_tag(html):
html = html.strip()
dr = re.compile(r'<[^>]+>', re.S)
html = dr.sub('', html)
return html
class Spider(object):
def __init__(self):
self.list_url_queue = multiprocessing.Manager().list()
self.seed_url = 'https://tieba.baidu.com/'
self.post_id_file = './ID.txt'
self.output_dir = './output/'
self.post_id = int()
# 多进程数量
self.process_num = 30
# 一次放多少条帖子链接队列
self.queue_put_num = 10000
def get_html(self, url):
req = urllib.request.Request(url, headers={'User-Agent': random.choice(UA_LIST)})
time.sleep(random.randint(3, 20))
attempts = 0
attempts_times = 15
while attempts < attempts_times:
try:
website = urllib.request.urlopen(req, timeout=(25 + random.randint(3, 10)))
html = website.read().decode('utf-8')
return html
except Exception as e:
attempts = attempts + 1
if attempts == attempts_times:
logging.warning('Get html: {0}: {1}'.format(e, url))
return ''
def load_post_id(self):
with open(self.post_id_file, 'r') as fr:
self.post_id = int(fr.read())
def save_post_id(self, numb):
with open(self.post_id_file, 'w') as fw:
fw.write(str(numb))
def init_post_id(self):
with m_lock:
if not os.path.exists(self.output_dir):
os.mkdir(self.output_dir)
if not os.path.exists(self.post_id_file):
with open(self.post_id_file, 'w') as fw:
fw.write('5000000000')
self.load_post_id()
logging.info('导入 {} 到队列'.format(str(self.post_id)))
for post_count in range(self.post_id, self.post_id + self.queue_put_num):
self.list_url_queue.append(post_count)
self.save_post_id(int(self.post_id + self.queue_put_num))
def crawl_post_list(self):
while True:
try:
if not self.list_url_queue:
self.init_post_id()
post_id = self.list_url_queue.pop(0)
post_id_prefix = re.findall('^[0-9]{6}', str(post_id))
output_file_path = self.output_dir + str(post_id_prefix[0]) + '/'
if not os.path.exists(output_file_path):
os.makedirs(output_file_path, exist_ok=True)
post_url = self.seed_url + 'p/' + str(post_id)
except Exception as e:
logging.critical('取ID问题: {}'.format(e))
continue
try:
post_html = self.get_html(post_url)
if not post_html:
continue
post_title = get_title(post_html)
if post_title == '很抱歉，该贴已被删除。':
# logging.error('{}: ---贴子被删---'.format(post_url))
continue
if post_title == '该吧被合并您所访问的贴子无法显示':
logging.error('{}: 贴吧被合并无法显示'.format(post_url))
continue
if post_title == '抱歉，您访问的贴子被隐藏，暂时无法访问。':
# logging.error('{}: *****帖子被隐藏*****'.format(post_url))
continue
if not post_title:
logging.error('{}: 找不到title'.format(post_url))
continue
first_page_content = get_whole_page_content(post_html)
if not first_page_content:
# logging.error('{}: ### 帖子无内容 ###'.format(post_url))
continue
all_content = first_page_content.split('\n\n')
page_num = get_posts_num(post_html)
for i in range(page_num):
if i != 0:
page_url = post_url + '?pn=' + str(i + 1)
other_page = self.get_html(page_url)
other_content = get_whole_page_content(other_page)
all_content = all_content + other_content.split('\n\n')
if not all_content[-1]:
all_content.pop()
dr = re.compile(r'/|[\\]|[ ]|[|]|[:]|[*]|[<]|[>]|[?]|[\']|["]')
post_title = dr.sub('_', post_title)
doc = {
'id': post_id,
'title': post_title,
'content': all_content
}
col.insert(doc)
print(doc)
# output_file = output_file_path + str(post_id) + '_' + post_title + '.txt'
# save_content(output_file, all_content)
logging.info('{0} ---{2}--- {1}'.format(post_id, post_title, str(page_num)))
except Exception as e:
logging.critical('尚未预料到的错误: {0} | {1}'.format(e, post_url))
continue
def start(self):
self.init_post_id()
processes = []
for i in range(1, self.process_num):
t = multiprocessing.Process(target=self.crawl_post_list, args=())
t.start()
processes.append(t)
for t in processes:
t.join()
if __name__ == '__main__':
logging.basicConfig(format='%(asctime)s|PID:%(process)d|%(levelname)s: %(message)s',
level=logging.INFO, filename='./log.txt')
spider = Spider()
spider.start()
# 开始id： 1000000000
# 220进程 3482837 16：14 3545049 18：22
# 401W 11：11
# 250进程 4137675 17：00