import refrom django.shortcuts import renderfrom pattern.web import URL, DOM, abs, find_urlsdef index(request):  """  find email addresses in requested url or contact page  """  error = ''  emails = set()  url_string = request.GET.get('url', '')  EMAIL_REGEX = re.compile(r'[A-Z0-9._%+-]+@[A-Z0-9.-]+.[A-Z]{2,6}', re.IGNORECASE)  # use absolute url or domain name   url = URL(url_string) if url_string.startswith('http') else URL(domain=url_string,protocol='http')  if url_string:    try:      dom = DOM(url.download(cached=True))    except Exception, e:      error = e    else:      contact_urls = { url.string }      # search links of contact page      for link in dom('a'):        if re.search(r'contact|about', link.source, re.IGNORECASE):          contact_urls.add(            abs(link.attributes.get('href',''), base=url.redirect or url.string))      for contact_url in contact_urls:        # download contact page        dom = DOM(URL(contact_url).download(cached=True))        # search emails in the body of the page        for line in dom('body')[0].content.split('n'):          found = EMAIL_REGEX.search(line)          if found:            emails.add(found.group())  data = {    'url': url_string,    'emails': emails,    'error': error,  }  return render(request, 'index.html', data)                                                                                                                                            复制代码