用python从网页中提取电子邮件
我发现下面的代码可以在一个网站(我想所有的网站)上抓取电子邮件用python从网页中提取电子邮件,python,beautifulsoup,python-requests,Python,Beautifulsoup,Python Requests,我发现下面的代码可以在一个网站(我想所有的网站)上抓取电子邮件 import re import requests import requests.exceptions from urllib.parse import urlsplit from collections import deque from bs4 import BeautifulSoup # starting url. replace google with your own url. starting_url = 'http
import re
import requests
import requests.exceptions
from urllib.parse import urlsplit
from collections import deque
from bs4 import BeautifulSoup
# starting url. replace google with your own url.
starting_url = 'http://www.miet.ac.in'
# a queue of urls to be crawled
unprocessed_urls = deque([starting_url])
# set of already crawled urls for email
processed_urls = set()
# a set of fetched emails
emails = set()
# process urls one by one from unprocessed_url queue until queue is empty
while len(unprocessed_urls):
# move next url from the queue to the set of processed urls
url = unprocessed_urls.popleft()
processed_urls.add(url)
# extract base url to resolve relative links
parts = urlsplit(url)
base_url = "{0.scheme}://{0.netloc}".format(parts)
path = url[:url.rfind('/')+1] if '/' in parts.path else url
# get url's content
print("Crawling URL %s" % url)
try:
response = requests.get(url)
except (requests.exceptions.MissingSchema, requests.exceptions.ConnectionError):
# ignore pages with errors and continue with next url
continue
# extract all email addresses and add them into the resulting set
# You may edit the regular expression as per your requirement
new_emails = set(re.findall(r"[a-z0-9\.\-+_]+@[a-z0-9\.\-+_]+\.[a-z]+", response.text, re.I))
emails.update(new_emails)
print(emails)
# create a beutiful soup for the html document
soup = BeautifulSoup(response.text, 'lxml')
# Once this document is parsed and processed, now find and process all the anchors i.e. linked urls in this document
for anchor in soup.find_all("a"):
# extract link url from the anchor
link = anchor.attrs["href"] if "href" in anchor.attrs else ''
# resolve relative links (starting with /)
if link.startswith('/'):
link = base_url + link
elif not link.startswith('http'):
link = path + link
# add the new url to the queue if it was not in unprocessed list nor in processed list yet
if not link in unprocessed_urls and not link in processed_urls:
unprocessed_urls.append(link)
如何修改这样的代码以仅提取一个网页。。?我只需要针对一个网页,而不是整个网站。只需删除汤中锚的
开头的所有行。查找所有(“a”):
。您的文档应如下所示:
import re
import requests
import requests.exceptions
from urllib.parse import urlsplit
from collections import deque
from bs4 import BeautifulSoup
# starting url. replace google with your own url.
starting_url = 'http://www.miet.ac.in'
# a queue of urls to be crawled
unprocessed_urls = deque([starting_url])
# set of already crawled urls for email
processed_urls = set()
# a set of fetched emails
emails = set()
# process urls one by one from unprocessed_url queue until queue is empty
while len(unprocessed_urls):
# move next url from the queue to the set of processed urls
url = unprocessed_urls.popleft()
processed_urls.add(url)
# extract base url to resolve relative links
parts = urlsplit(url)
base_url = "{0.scheme}://{0.netloc}".format(parts)
path = url[:url.rfind('/')+1] if '/' in parts.path else url
# get url's content
print("Crawling URL %s" % url)
try:
response = requests.get(url)
except (requests.exceptions.MissingSchema, requests.exceptions.ConnectionError):
# ignore pages with errors and continue with next url
continue
# extract all email addresses and add them into the resulting set
# You may edit the regular expression as per your requirement
new_emails = set(re.findall(r"[a-z0-9\.\-+_]+@[a-z0-9\.\-+_]+\.[a-z]+", response.text, re.I))
emails.update(new_emails)
print(emails)
# create a beutiful soup for the html document
soup = BeautifulSoup(response.text, 'lxml')
要使用Python生成随机电子邮件地址,请使用以下命令:
from faker import Faker
faker = Faker()
for i in range(12):
print(f'{faker.email()}')
您的问题不清楚或不局限于特定问题,请检查并编辑您的问题与确切问题从网站(不是所有网站,但只有一个链接)获取电子邮件的问题删除循环似乎很简单。被认为是诚实的。。。。这样就更容易不用排队了,只需拔出bs4位并发出一个请求。@QHarr我对python的东西非常熟悉:)@QHarr你能帮我吗。。该网站将有一个JavaScript和代码不处理它?有解决办法吗?非常感谢。太好了。但在尝试使用此网站时
https://www.randomlists.com/email-addresses
,它不起作用。这是因为此网站在加载完网站后,会使用javascript加载电子邮件地址。因此,在对网页进行爬网时,地址还不在网页中,爬虫程序无法找到它们。您可以使用我的另一个答案,用Python生成随机电子邮件地址。非常感谢。处理JavaScript有什么好运气吗。。?因为目标是从任何有或没有JavaScript的页面获取电子邮件。