<Ul> <Li> A request line ( e.g. , GET / images / logo. png HTTP / 1.1 , which requests a resource called / images / logo. png from the server ) . </Li> <Li> Request header fields ( e.g. , Accept - Language : en ) . </Li> <Li> An empty line . </Li> <Li> An optional message body . </Li> </Ul>
the first line of http request message is called -- -- -- --
A request line