305 Use Proxy

The HTTP 305 Use Proxy status code is a deprecated status code returned by an origin server to indicate the requested resource is accessible only through a proxy.

Usage

The 305 Use Proxy status code instructs the client to obtain the requested resource through a proxy. The proxy address is specified in the Location header.

Example

The client requests a specific resource, and the server responds with 305 Use Proxy to indicate where the client sends an identical request.

Request

GET /document.pdf HTTP/1.1
Host: www.example.re

Response

HTTP/1.1 305 Use Proxy
Location: https://proxy.example.re:8080

Code references

.NET

HttpStatusCode.UseProxy

Rust

http::StatusCode::USE_PROXY

Rails

:use_proxy

Go

http.StatusUseProxy

Symfony

Response::HTTP_USE_PROXY

Python3.5+

http.HTTPStatus.USE_PROXY

Java

java.net.HttpURLConnection.HTTP_USE_PROXY

Apache HttpComponents Core

org.apache.hc.core5.http.HttpStatus.SC_USE_PROXY

Angular

@angular/common/http/HttpStatusCode.UseProxy

Takeaway

The 305 Use Proxy status code indicates the request needs to go through a proxy at the Location specified in the response. This status code is deprecated and not honored by most modern clients.

See also

• RFC 9110: HTTP Semantics
• Original draft
• 306
• 300
• HTTP status codes