def post_to_server(self, data, auth=None):  # noqa: C901
        '''Post a query to the server, and return a string response.'''
        if 'name' in data:
            self.announce(
                'Registering {} to {}'.format(data['name'], self.repository),
                logging.INFO,
            )
        # Build up the MIME payload for the urllib2 POST data
        boundary = '--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
        sep_boundary = '\n--' + boundary
        end_boundary = sep_boundary + '--'
        body = io.StringIO()
        for key, value in data.items():
            # handle multiple entries for the same name
            if type(value) not in (type([]), type(())):
                value = [value]
            for value in value:
                value = str(value)
                body.write(sep_boundary)
                body.write('\nContent-Disposition: form-data; name="%s"' % key)
                body.write("\n\n")
                body.write(value)
                if value and value[-1] == '\r':
                    body.write('\n')  # write an extra newline (lurve Macs)
        body.write(end_boundary)
        body.write("\n")
        body = body.getvalue().encode("utf-8")

        # build the Request
        headers = {
            'Content-type': 'multipart/form-data; boundary=%s; charset=utf-8'
            % boundary,
            'Content-length': str(len(body)),
        }
        req = urllib.request.Request(self.repository, body, headers)

        # handle HTTP and include the Basic Auth handler
        opener = urllib.request.build_opener(
            urllib.request.HTTPBasicAuthHandler(password_mgr=auth)
        )
        data = ''
        try:
            result = opener.open(req)
        except urllib.error.HTTPError as e:
            if self.show_response:
                data = e.fp.read()
            result = e.code, e.msg
        except urllib.error.URLError as e:
            result = 500, str(e)
        else:
            if self.show_response:
                data = self._read_pypi_response(result)
            result = 200, 'OK'
        if self.show_response:
            msg = '\n'.join(('-' * 75, data, '-' * 75))
            self.announce(msg, logging.INFO)
        return result
Post a query to the server, and return a string response.
product/gradle-plugin/src/main/python/setuptools/_distutils/command/register.py