request.py 文件源码

def http_error_auth_reqed(self, authreq, host, req, headers):
        # host may be an authority (without userinfo) or a URL with an
        # authority
        # XXX could be multiple headers
        authreq = headers.get(authreq, None)

        if self.retried > 5:
            # retry sending the username:password 5 times before failing.
            raise HTTPError(req.get_full_url(), 401, "basic auth failed",
                    headers, None)
        else:
            self.retried += 1

        if authreq:
            scheme = authreq.split()[0]
            if scheme.lower() != 'basic':
                raise ValueError("AbstractBasicAuthHandler does not"
                                 " support the following scheme: '%s'" %
                                 scheme)
            else:
                mo = AbstractBasicAuthHandler.rx.search(authreq)
                if mo:
                    scheme, quote, realm = mo.groups()
                    if quote not in ['"',"'"]:
                        warnings.warn("Basic Auth Realm was unquoted",
                                      UserWarning, 2)
                    if scheme.lower() == 'basic':
                        response = self.retry_http_basic_auth(host, req, realm)
                        if response and response.code != 401:
                            self.retried = 0
                        return response