305 Use Proxy

HTTP response status code 305 Use Proxy is a deprecated HTTP status code returned by an origin server to indicate that the requested resource can only be accessed through a proxy.

Usage

The 305 Use Proxy status code is used to instruct the client that the requested resource must be obtained through a proxy and includes the new address in the Set-Proxy HTTP header, or if the Set-Proxy HTTP header is absent, in the Location HTTP header.

Example

In the example, the client requests a specific resource, and the server returns with 305 Use Proxy status code as an instruction for where the client can send an identical HTTP 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 that the HTTP request needs to be made through a proxy, and specifies the Location that a subsequent, identical HTTP request shall be made.

See also

• Original draft
• RFC 2616
• RFC 7231