没有结果也没有报错啊
# -*- coding: utf-8 -*-
from baike_spider import url_manager, html_downloader, html_parser, html_outputer
import traceback
class Spidermain(object):
def __init__(self):
self.urls = url_manager.UrlManger()
self.downloader = html_downloader.HtmlDownloader()
self.parser = html_parser.HtmlParser()
self.outputer = html_outputer.HtmlOutputer()
def craw(self, root_url):
count = 1
self.urls.add_new_url(root_url)
while self.urls.has_new_rul():
try:
new_url = self.urls.get_new_url()
print 'craw %d : %s' % (count, new_url)
html_cont = self.downloader.download(new_url)
new_urls, new_data = self.parser.parse(new_url, html_cont)
self.urls.add_new_urls(new_urls)
self.outputer.collect_data(new_data)
if count == 1000:
break
count = count + 1
except Exception as e:
print traceback.format_exc()
self.outputer.output_html()
if __name__ == "main":
root_url = "http://baike.baidu.com/view/21087.htm"
obj_spider = Spidermain()
obj_spider.craw(root_url)
管理器
# -*- coding: utf-8 -*-
class UrlManger(object):
def __init__(self):
self.new_urls = set()
self.old_urls = set()
def add_new_url(self, url):
if url is None:
return
if url not in self.new_urls and url not in self.old_urls:
self.new_urls.add(url)
# not in waiting list and not in old list, so add it to waitinglist
def add_new_urls(self, urls):
if urls is None or len(urls) == 0:
return
for url in urls:
self.add_new_url(url)
# iteration?
def has_new_rul(self):
return len(self.new_urls) != 0
def get_new_url(self):
new_url = self.new_urls.pop()
self.old_urls.add(new_url)
# pop new_url form self.new_ruls and add it to old list
return new_url
下载器
import urllib2
class HtmlDownloader(object):
def download(self, url):
if url is None:
return None
response = urllib2.urlopen(url)
if response.getcode() != 200:
return None
return response.read()
解析器
'''
@author: erics
'''
from bs4 import BeautifulSoup
import re
import urlparse
class HtmlParser(object):
def _get_new_urls(self, page_rul, soup):
new_urls = set()
# /view/123.htm, find all link has the same format
links = soup.find_all('a', href=re.compile(r"/view/\d+\.htm"))
for link in links:
new_url = link['href']
new_full_url = urlparse.urljoin(page_rul, new_url)
new_urls.add(new_full_url)
return new_urls
def _get_new_data(self, page_url, soup):
res_data = {}
# url
res_data['url'] = page_url
# <dd class="lemmaWgt-lemmaTitle-title"> <h1>Python</h1>
title_node = soup.find('dd', class_="lemmaWgt-lemmaTitle-title").find('h1')
res_data['title'] = title_node.get_text()
# <div class="lemma-summary" label-module="lemmaSummary">
summary_node = soup.find('div', class_="lemma-summary")
res_data['summary'] = summary_node.get_text()
return res_data
def parse(self, page_rul, html_cont):
if page_rul is None or html_cont is None:
return
soup = BeautifulSoup(html_cont, 'html.parser', from_encoding='utf-8')
new_urls = self._get_new_urls(page_rul, soup)
new_data = self._get_new_data(page_rul, soup)
return new_urls, new_data
输出器
class HtmlOutputer(object):
def __init__(self):
self.datas = []
def collect_data(self, data):
if data is None:
return
self.datas.append(data)
def output_html(self):
fout = open('output.html', 'w')
fout.write("<html>")
fout.write("<body>")
fout.write("<table>")
for data in self.datas:
fout.write("<tr>")
fout.write("<tr>%s</td>" % data['url'])
fout.write("<tr>%s</td>" % data['title'].encode('utf-8'))
fout.write("<tr>%s</td>" % data['summary'].encode('utf-8'))
fout.write("</tr>")
fout.write("</table>")
fout.write("</body>")
fout.write("</html>")
fout.close()
class HtmlParser(object):
def _get_new_urls(self, page_rul, soup):
new_urls = set()
# /view/123.htm, find all link has the same format
links = soup.find_all('a', href=re.compile(r"/view/\d+\.htm"))
for link in links:
new_url = link['href']
new_full_url = urlparse.urljoin(page_rul, new_url)
new_urls.add(new_full_url)
return new_urls
def _get_new_data(self, page_url, soup):
res_data = {}
# url
res_data['url'] = page_url
# <dd class="lemmaWgt-lemmaTitle-title"> <h1>Python</h1>
title_node = soup.find('dd', class_="lemmaWgt-lemmaTitle-title").find('h1')
res_data['title'] = title_node.get_text()
# <div class="lemma-summary" label-module="lemmaSummary">
summary_node = soup.find('div', class_="lemma-summary")
res_data['summary'] = summary_node.get_text()
return res_data
def parse(self, page_rul, html_cont):
if page_rul is None or html_cont is None:
return
soup = BeautifulSoup(html_cont, 'html.parser', from_encoding='utf-8')
new_urls = self._get_new_urls(page_rul, soup)
new_data = self._get_new_data(page_rul, soup)
return new_urls, new_data求助呀，为什么没有结果也没有报错啊0 0？
C:\Python27\python.exe C:/Users/erics/PycharmProjects/imooc/baike_spider/spider_main.py
Process finished with exit code 0
