unikernel/duniverse/httpun/examples/async/async_get.ml

@@ -0,0 +1,38 @@
+open! Core
+open Async
+
+open Httpun
+open Httpun_async
+
+let main port host () =
+  let where_to_connect = Tcp.Where_to_connect.of_host_and_port { host; port } in
+  Tcp.connect_sock where_to_connect
+  >>= fun socket ->
+    let finished = Ivar.create () in
+    let response_handler =
+      Httpun_examples.Client.print
+        ~on_eof:((Ivar.fill [@ocaml.alert "-deprecated"]) finished) in
+    let headers = Headers.of_list [ "host", host ] in
+    Client.create_connection socket >>= fun connection ->
+    let request_body =
+      Client.request
+        connection
+        ~error_handler:Httpun_examples.Client.error_handler
+        ~response_handler
+        (Request.create ~headers `GET "/")
+    in
+    Body.Writer.close request_body;
+    Ivar.read finished
+;;
+
+let () =
+  Command.async
+    ~summary:"Start a hello world Async client"
+    Command.Param.(
+      map (both
+          (flag "-p" (optional_with_default 80 int)
+            ~doc:"int destination port")
+          (anon ("host" %: string)))
+        ~f:(fun (port, host) ->
+              (fun () -> main port host ())))
+  |> Command_unix.run