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crawler.py
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crawler.py
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import urllib.request
import ssl
import re
import os
import time
import threading
ssl._create_default_https_context = ssl._create_unverified_context
base = 'https://www.booktxt.net'
def getHtml(url):
html = urllib.request.urlopen(url).read().decode('gbk')
return html
def getCover(img_url,location):
urllib.request.urlretrieve(img_url,location)
def getInfo(html):
pattern_info = '<meta property="og:description" content=".+?"/>'
res = re.compile(pattern_info).findall(html)[0]
res = res[41:-3]
res = res.replace(' ',' ')
return res
def write(content,location,mode):
with open(location,mode,encoding='utf-8') as file:
file.write(content)
def getChapter(html,res_url):
html = html[html.find('正文'):]
pattern_chapter = '<dd><a href=".+?">.+?</a></dd>'
res = re.compile(pattern_chapter).findall(html)
for i in range(len(res)):
chapter = res[i]
chapter = chapter[13:][:-9]
index = chapter.find('"')
chapter_url = chapter[:index]
chapter_url = base + chapter_url
# index = chapter.find(' ')
# chapter_title = chapter[index+1:]
# print(chapter_url,chapter_title)
passage = getChapterContent(chapter_url)
write(passage,'book/' + res_url + '/' + str(i+1) + '.txt','w')
time.sleep(1)
return len(res)
# print(html)
def getChapterContent(chapter_url):
html = getHtml(chapter_url)
html = html[html.find('div id="content">'):html.find('<script>read3();</script>')-12]
# print(html)
pattern_chapter_content = ' .+'
res = re.compile(pattern_chapter_content).findall(html)
paragraphs = ''
for paragraph in res:
paragraph = paragraph[24:]
paragraph = paragraph.replace('<br />','')
# print(paragraph)
paragraphs += ' ' + paragraph + '\n'
return paragraphs
def getBooks():
url = base + "/xiaoshuodaquan"
html = getHtml(url)
# print(html)
pattern_title = '<li><a href=".+?">.+?</a></li>'
res = re.compile(pattern_title).findall(html)
res = res[10:]
size = len(res)
books = []
for i in range(size):
url_title = res[i]
url_title = url_title[13:][:-9]
index = url_title.find('"')
url = url_title[:index-1]
res_url = url[url.rfind('/')+1:]
title = url_title[index+2:]
books.append([url,res_url,title])
return books
def getBook(book,index):
url = book[0]
res_url = book[1]
title = book[2]
print(index,title)
os.mkdir('book/' + res_url)
img_url = 'https://www.booktxt.net/files/article/image/' + res_url[0:1] + '/' + res_url[-4:] + '/' + res_url[-4:] + 's.jpg'
getCover(img_url,'book/'+res_url+'/cover.jpg')
subhtml = getHtml(url)
info = getInfo(subhtml)
write(info,'book/' + res_url + '/info.txt','w')
chapter_no = getChapter(subhtml,res_url)
sqlstr = 'INSERT INTO book(book_name,location,chapter_no) VALUES("' + title + '","' + res_url + '",' + str(chapter_no) + ');\n'
write(sqlstr,'book.sql','a')
def main():
start_time = time.time()
books = getBooks()
i = 0
total_size = len(books)
while i < 100: # 只爬前100本书,总共三千本书,实在是太多了,没必要
if(threading.activeCount() < 50):
thd = threading.Thread(target=getBook,args=(books[i],i))
i += 1
thd.start()
time.sleep(1)
for thd in threading.enumerate():
if(thd.getName() != threading.currentThread().getName()):
thd.join()
stop_time = time.time()
diff = stop_time - start_time
print(diff,"seconds")
print(diff/60,"minutes")
print(diff/60/60,"hours")
if __name__ == '__main__':
main()