http 407 Proxy Authentication Required

4×× Client Error

407 Proxy Authentication Required

Similar to 401 Unauthorized, but it indicates that the client needs to authenticate itself in order to use a proxy.
The proxy MUST send a Proxy-Authenticate header field1 containing a challenge applicable to that proxy for the target resource. The client MAY repeat the request with a new or replaced Proxy-Authorization header field2.

• 1 Proxy-Authenticate RFC7235 Section 4.3
• 2 Proxy-Authorization RFC7235 Section 4.4
• Source: RFC7235 Section 3.2

407 Code References

Rails HTTP Status Symbol roxy_authentication_required
Go HTTP Status Constant http.StatusProxyAuthRequired
Symfony HTTP Status Constant Response::HTTP_PROXY_AUTHENTICATION_REQUIRED
Python2 HTTP Status Constant httplib.PROXY_AUTHENTICATION_REQUIRED
Python3 HTTP Status Constant http.client.PROXY_AUTHENTICATION_REQUIRED
Python3.5 HTTP Status Constant http.HTTPStatus.PROXY_AUTHENTICATION_REQUIRED