Proxy Web Servers and Authentication > How Proxies Work > Overview of HTTP/1.0 and HTTP/1.1 protocols

Formats of messages

• HTTP messages have the following structure
  1. Request/Response Line
  2. Zero or more headers
  3. A blank line
  4. Zero or one entities
• Request lines have the form: <Method> <Address> <Protocol-Version>
• Response lines have the form: <Protocol-Version> <Response-code> <Text-Message>
• Header lines have the form: <Header-name>:  <Value>
• Lines end with Carriage-Return/Line-Feed combinations.