Request GET /document.pdf HTTP/1.1 Host: proxy.example.com Response HTTP/1.1 306 Switch Proxy Set-Proxy: SET; proxyURI=""https://proxy-2.example.com:8080/" scope="http://", seconds=120

Request GET /document.pdf HTTP/1.1 Host: www.example.com Response HTTP/1.1 305 Use Proxy Location: https://proxy.example.com:8080

Initial request GET /news.html HTTP/1.1 Host: www.example.com Initial response HTTP/1.1 200 OK Etag: “1234 … 000" Content-Type: text/html Content-Length: 1250 < message body contains requested resource> Second request GET /news.html HTTP/1.1 Host: www.example.com If-None-Match: “1234 …...

Request DELETE /tasks/314 HTTP/1.1 Host: www.example.com Response HTTP/1.1 303 See Other Location: http//www.example.com/confirmation/delete.html

Request GET /news.html HTTP/1.1 Host: www.example.com Response HTTP/1.1 302 Found Location: http//www.example.com/testing/news.html Content-Type: text/html Content-Length: 167 < h1>The Newsfeed has moved < body>The site is currently under development and the newsfeed has temporarily...