dioxus-mirror/packages/fullstack/docs/request_origin.md

This method interacts with information from the current request. The request may come from:

1. The initial SSR render if this method called from a Component or a server function that is called during the initial render

   #[component]
   fn PrintHtmlRequestInfo() -> Element {
   // The server context only exists on the server, so we need to put it behind a server_only! config
   server_only! {
       // Since we are calling this from a component, the server context that is returned will be from
       // the html request for ssr rendering
       println!("headers are {:?}", server_context().request_parts().headers);
   }
   rsx! {}
   }
   

2. A request to a server function called directly from the client (either on desktop/mobile or on the web frontend after the initial render)

   #[server]
   async fn read_headers() -> Result<(), ServerFnError> {
   // Since we are calling this from a server function, the server context that is may be from the
   // initial request or a request from the client
   println!("headers are {:?}", server_context().request_parts().headers);
   Ok(())
   }
   
   #[component]
   fn CallServerFunction() -> Element {
   rsx! {
       button {
           // If you click the button, the server function will be called and the server context will be
           // from the client request
           onclick: move |_| read_headers().await,
           "Call server function"
       }
   }
   }