code: def get_content(url, user=None, password=None, proxy=None, data=None,
                  addheaders=None):
      
      from . import configuration
      headers = {
          'User-Agent': configuration.UserAgent,
      }
      if addheaders:
          headers.update(addheaders)
      method = 'GET'
      kwargs = dict(headers=headers)
      if user and password:
          kwargs['auth'] = (user, password)
      if data:
          kwargs['data'] = data
          method = 'POST'
      if proxy:
          kwargs['proxy'] = dict(http=proxy)
      from .configuration import get_share_file
      try:
          kwargs["verify"] = get_share_file('cacert.pem')
      except ValueError:
          pass
      try:
          response = requests.request(method, url, **kwargs)
          return response.text, response.headers
      except (requests.exceptions.RequestException,
              requests.exceptions.BaseHTTPError) as msg:
          log.warn(LOG_CHECK, ("Could not get content of URL %(url)s: %(msg)s.") \
            % {"url": url, "msg": str(msg)})
          return None, str(msg)
docs: Get URL content and info.
  
      @return: (decoded text content of URL, headers) or
               (None, errmsg) on error.
      @rtype: tuple (String, dict) or (None, String)