python 爬取指定url的ICP备案信息

#coding=gbk

import os

import sys

import re

import time

import urllib2

def perror_and_exit(message, status = -1):

sys.stderr.write(message + ‘\n’)

sys.exit(status)

def get_text_from_html_tag(html):

pattern_text = re.compile(r”>.*? return pattern_text.findall(html)[0][1:-2].strip()

def parse_alexa(url):

url_alexa = “” % url

print url_alexa

#handle exception

times = 0

while times < 5000: #等待有一定次数限制

try:

alexa = urllib2.urlopen(url_alexa).read()

pattern_table = re.compile(r”.*?”, re.DOTALL | re.MULTILINE)

match_table = pattern_table.search(alexa)

if not match_table:

raise BaseException(“No table in HTML”)

break

except:

print “try %s times:sleep %s seconds” % (times, 2**times)

times += 1

time.sleep(2**times)

continue

table = match_table.group()

pattern_tr = re.compile(r”.*?”, re.DOTALL | re.MULTILINE)

match_tr = pattern_tr.findall(table)

if len(match_tr) != 2:

perror_and_exit(“table format is incorrect”)

icp_tr = match_tr[1]

pattern_td = re.compile(r”.*?”, re.DOTALL | re.MULTILINE)

match_td = pattern_td.findall(icp_tr)

#print match_td

company_name = get_text_from_html_tag(match_td[1])

company_properties = get_text_from_html_tag(match_td[2])

company_icp = get_text_from_html_tag(match_td[3])

company_icp = company_icp[company_icp.find(“>”) + 1:]

company_website_name = get_text_from_html_tag(match_td[4])

company_website_home_page = get_text_from_html_tag(match_td[5])

company_website_home_page = company_website_home_page[company_website_home_page.rfind(“>”) + 1:]

company_detail_url = get_text_from_html_tag(match_td[7])

pattern_href = re.compile(r”href=\”.*?\””, re.DOTALL | re.MULTILINE)

match_href = pattern_href.findall(company_detail_url)

if len(match_href) == 0:

company_detail_url = “”

else:

company_detail_url = match_href[0][len(“href=\””):-1]

return [url, company_name, company_properties, company_icp, company_website_name, company_website_home_page, company_detail_url]

pass

if __name__ == “__main__”:

fw = file (“out.txt”, “w”)

for url in sys.stdin:

fw.write(“\t”.join(parse_alexa(url)) + “\n”)

#coding=gbk

import os

import sys

import re

import time

import urllib2

def perror_and_exit(message, status = -1):

sys.stderr.write(message + ‘\n’)

sys.exit(status)

def get_text_from_html_tag(html):

pattern_text = re.compile(r”>.*? return pattern_text.findall(html)[0][1:-2].strip()

def parse_alexa(url):

url_alexa = “” % url

print url_alexa

#handle exception

times = 0

while times < 5000: #等待有一定次数限制

try:

alexa = urllib2.urlopen(url_alexa).read()

pattern_table = re.compile(r”.*?”, re.DOTALL | re.MULTILINE)

match_table = pattern_table.search(alexa)

if not match_table:

raise BaseException(“No table in HTML”)

break

except:

print “try %s times:sleep %s seconds” % (times, 2**times)

times += 1

time.sleep(2**times)

continue

table = match_table.group()

pattern_tr = re.compile(r”.*?”, re.DOTALL | re.MULTILINE)

match_tr = pattern_tr.findall(table)

if len(match_tr) != 2:

perror_and_exit(“table format is incorrect”)

icp_tr = match_tr[1]

pattern_td = re.compile(r”.*?”, re.DOTALL | re.MULTILINE)

match_td = pattern_td.findall(icp_tr)

#print match_td

company_name = get_text_from_html_tag(match_td[1])

company_properties = get_text_from_html_tag(match_td[2])

company_icp = get_text_from_html_tag(match_td[3])

company_icp = company_icp[company_icp.find(“>”) + 1:]

company_website_name = get_text_from_html_tag(match_td[4])

company_website_home_page = get_text_from_html_tag(match_td[5])

company_website_home_page = company_website_home_page[company_website_home_page.rfind(“>”) + 1:]

company_detail_url = get_text_from_html_tag(match_td[7])

pattern_href = re.compile(r”href=\”.*?\””, re.DOTALL | re.MULTILINE)

match_href = pattern_href.findall(company_detail_url)

if len(match_href) == 0:

company_detail_url = “”

else:

company_detail_url = match_href[0][len(“href=\””):-1]

return [url, company_name, company_properties, company_icp, company_website_name, company_website_home_page, company_detail_url]

pass

if __name__ == “__main__”:

fw = file(“out.txt”, “w”)

for url in sys.stdin:

fw.write(“\t”.join(parse_alexa(url)) + “\n”)[ python ] view plaincopyprint? time.sleep(2)

pass

time.sleep(2)

pass

每次抓取都会sleep 2s，防止ip被封，实际上即使sleep了IP过一段时间还是会被封

由于是结构化抓取，当网站格式变化此程序将无法使用

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