Replaced deprecated cgi module with email module. Ref #232.

distutils/config.py

@@ -5,6 +5,7 @@
 """
 
 import os
+import email.message
 from configparser import RawConfigParser
 
 from .cmd import Command
@@ -121,11 +122,8 @@ def _read_pypirc(self): # noqa: C901
 
  def _read_pypi_response(self, response):
  """Read and decode a PyPI HTTP response."""
- import cgi
-
  content_type = response.getheader('content-type', 'text/plain')
- encoding = cgi.parse_header(content_type)[1].get('charset', 'ascii')
- return response.read().decode(encoding)
+ return response.read().decode(_extract_encoding(content_type))
 
  def initialize_options(self):
  """Initialize options."""
@@ -139,3 +137,15 @@ def finalize_options(self):
  self.repository = self.DEFAULT_REPOSITORY
  if self.realm is None:
  self.realm = self.DEFAULT_REALM
+
+
+def _extract_encoding(content_type):
+ """
+ >>> _extract_encoding('text/plain')
+ 'ascii'
+ >>> _extract_encoding('text/html; charset="utf8"')
+ 'utf8'
+ """
+ msg = email.message.EmailMessage()
+ msg['content-type'] = content_type
+ return msg['content-type'].params.get('charset', 'ascii')