unikernel/duniverse/httpun/examples/lwt/dune

@@ -0,0 +1,9 @@
+(executables
+ (libraries httpun httpun-lwt-unix httpun_examples base stdio lwt lwt.unix)
+ (names lwt_get lwt_get_pipelined lwt_post lwt_echo_post lwt_https_get
+   lwt_https_server))
+
+(alias
+ (name examples)
+ (deps
+  (glob_files *.exe)))

unikernel/duniverse/httpun/examples/lwt/lwt_echo_post.ml

@@ -0,0 +1,34 @@
+open Base
+open Lwt.Infix
+module Arg = Stdlib.Arg
+
+open Httpun_lwt_unix
+
+let error_handler (_ : Unix.sockaddr) = Httpun_examples.Server.error_handler
+let request_handler (_ : Unix.sockaddr)  =
+  Httpun_examples.Server.echo_post
+
+let main port =
+  let listen_address = Unix.(ADDR_INET (inet_addr_loopback, port)) in
+  Lwt.async (fun () ->
+    Lwt_io.establish_server_with_client_socket
+      listen_address
+      (Server.create_connection_handler ~request_handler ~error_handler)
+    >|= fun _server ->
+      Stdio.printf "Listening on port %i and echoing POST requests.\n" port;
+      Stdio.printf "To send a POST request, try one of the following\n\n";
+      Stdio.printf "  echo \"Testing echo POST\" | dune exec examples/async/async_post.exe\n";
+      Stdio.printf "  echo \"Testing echo POST\" | dune exec examples/lwt/lwt_post.exe\n";
+      Stdio.printf "  echo \"Testing echo POST\" | curl -XPOST --data @- http://localhost:%d\n\n%!" port);
+  let forever, _ = Lwt.wait () in
+  Lwt_main.run forever
+;;
+
+let () =
+  let port = ref 8080 in
+  Arg.parse
+    ["-p", Arg.Set_int port, " Listening port number (8080 by default)"]
+    ignore
+    "Echoes POST requests. Runs forever.";
+  main !port
+;;

unikernel/duniverse/httpun/examples/lwt/lwt_get.ml

@@ -0,0 +1,45 @@
+open Base
+open Lwt.Infix
+module Arg = Stdlib.Arg
+
+open Httpun
+open Httpun_lwt_unix
+
+let main port host =
+  Lwt_unix.getaddrinfo host (Int.to_string port) [Unix.(AI_FAMILY PF_INET)]
+  >>= fun addresses ->
+  let socket = Lwt_unix.socket Unix.PF_INET Unix.SOCK_STREAM 0 in
+  Lwt_unix.connect socket (List.hd_exn addresses).Unix.ai_addr
+  >>= fun () ->
+  let finished, notify_finished = Lwt.wait () in
+  let response_handler =
+    Httpun_examples.Client.print ~on_eof:(Lwt.wakeup_later notify_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;
+  finished >>= fun () ->
+    Client.shutdown connection
+;;
+
+let () =
+  let host = ref None in
+  let port = ref 80 in
+  Arg.parse
+    ["-p", Set_int port, " Port number (80 by default)"]
+    (fun host_argument -> host := Some host_argument)
+    "lwt_get.exe [-p N] HOST";
+  let host =
+    match !host with
+    | None -> failwith "No hostname provided"
+    | Some host -> host
+  in
+  Lwt_main.run (main !port host)
+;;

unikernel/duniverse/httpun/examples/lwt/lwt_get_pipelined.ml

@@ -0,0 +1,61 @@
+open Base
+open Lwt.Infix
+module Arg = Stdlib.Arg
+
+open Httpun
+open Httpun_lwt_unix
+
+let error_handler _ = assert false
+
+let main port host =
+  Lwt_unix.getaddrinfo host (Int.to_string port) [Unix.(AI_FAMILY PF_INET)]
+  >>= fun addresses ->
+  let socket = Lwt_unix.socket Unix.PF_INET Unix.SOCK_STREAM 0 in
+  Lwt_unix.connect socket (List.hd_exn addresses).Unix.ai_addr
+  >>= fun () ->
+  let finished, notify_finished = Lwt.wait () in
+  let response_handler =
+    Httpun_examples.Client.print ~on_eof:(Lwt.wakeup_later notify_finished)
+  in
+  let request_headers =
+    Request.create ~headers:(Headers.of_list [ "host", host ]) `GET "/"
+  in
+  Client.create_connection socket >>= fun connection ->
+  let request_body =
+    Client.request
+      connection
+      ~response_handler
+      ~error_handler
+      request_headers
+  in
+  let finished', notify_finished' = Lwt.wait () in
+  let response_handler' =
+    Httpun_examples.Client.print ~on_eof:(Lwt.wakeup_later notify_finished')
+  in
+  let request_body' =
+    Client.request
+      connection
+      ~response_handler:response_handler'
+      ~error_handler
+      request_headers
+  in
+  Body.Writer.close request_body';
+  Body.Writer.close request_body;
+  Lwt.join [finished; finished'] >>= fun () ->
+    Client.shutdown connection
+;;
+
+let () =
+  let host = ref None in
+  let port = ref 80 in
+  Arg.parse
+    ["-p", Set_int port, " Port number (80 by default)"]
+    (fun host_argument -> host := Some host_argument)
+    "lwt_get.exe [-p N] HOST";
+  let host =
+    match !host with
+    | None -> failwith "No hostname provided"
+    | Some host -> host
+  in
+  Lwt_main.run (main !port host)
+;;

unikernel/duniverse/httpun/examples/lwt/lwt_https_get.ml

@@ -0,0 +1,45 @@
+open Base
+open Lwt.Infix
+module Arg = Stdlib.Arg
+
+open Httpun
+open Httpun_lwt_unix
+
+let error_handler _ = assert false
+
+let main port host =
+  Lwt_unix.getaddrinfo host (Int.to_string port) [Unix.(AI_FAMILY PF_INET)]
+  >>= fun addresses ->
+  let socket = Lwt_unix.socket Unix.PF_INET Unix.SOCK_STREAM 0 in
+  Lwt_unix.connect socket (List.hd_exn addresses).Unix.ai_addr
+  >>= fun () ->
+  let finished, notify_finished = Lwt.wait () in
+  let response_handler =
+    Httpun_examples.Client.print ~on_eof:(Lwt.wakeup_later notify_finished)
+  in
+  let headers = Headers.of_list [ "host", host ] in
+  Client.TLS.create_connection_with_default socket >>= fun connection ->
+  let request_body = Client.TLS.request
+    connection
+    ~error_handler
+    ~response_handler
+    (Request.create ~headers `GET "/")
+  in
+  Body.Writer.close request_body;
+  finished
+;;
+
+let () =
+  let host = ref None in
+  let port = ref 443 in
+  Arg.parse
+    ["-p", Set_int port, " Port number (443 by default)"]
+    (fun host_argument -> host := Some host_argument)
+    "lwt_https_get.exe [-p N] HOST";
+  let host =
+    match !host with
+    | None -> failwith "No hostname provided"
+    | Some host -> host
+  in
+  Lwt_main.run (main !port host)
+;;

unikernel/duniverse/httpun/examples/lwt/lwt_https_server.ml

@@ -0,0 +1,39 @@
+open Base
+open Lwt.Infix
+module Arg = Stdlib.Arg
+
+open Httpun_lwt_unix
+
+let request_handler (_ : Unix.sockaddr)  = Httpun_examples.Server.echo_post
+let error_handler (_ : Unix.sockaddr) = Httpun_examples.Server.error_handler
+
+let main port =
+  let listen_address = Unix.(ADDR_INET (inet_addr_loopback, port)) in
+  let certfile = "./certificates/server.pem" in
+  let keyfile = "./certificates/server.key" in
+  Lwt.async (fun () ->
+    Lwt_io.establish_server_with_client_socket
+      listen_address
+      (Server.TLS.create_connection_handler_with_default
+        ~certfile
+        ~keyfile
+        ~request_handler
+        ~error_handler)
+    >|= fun _server ->
+      Stdio.printf "Listening on port %i and echoing POST requests.\n" port;
+      Stdio.printf "To send a POST request, try one of the following\n\n";
+      Stdio.printf "  echo \"Testing echo POST\" | dune exec examples/async/async_post.exe\n";
+      Stdio.printf "  echo \"Testing echo POST\" | dune exec examples/lwt/lwt_post.exe\n";
+      Stdio.printf "  echo \"Testing echo POST\" | curl -XPOST --data @- http://localhost:8080\n\n%!");
+  let forever, _ = Lwt.wait () in
+  Lwt_main.run forever
+;;
+
+let () =
+  let port = ref 8080 in
+  Arg.parse
+    ["-p", Arg.Set_int port, " Listening port number (8080 by default)"]
+    ignore
+    "Echoes POST requests. Runs forever.";
+  main !port
+;;

unikernel/duniverse/httpun/examples/lwt/lwt_post.ml

@@ -0,0 +1,54 @@
+open Base
+open Lwt.Infix
+module Arg = Stdlib.Arg
+
+open Httpun
+open Httpun_lwt_unix
+
+let main port host =
+  Lwt_io.(read stdin)
+  >>= fun body ->
+  Lwt_unix.getaddrinfo host (Int.to_string port) [Unix.(AI_FAMILY PF_INET)]
+  >>= fun addresses ->
+  let socket = Lwt_unix.socket Unix.PF_INET Unix.SOCK_STREAM 0 in
+  Lwt_unix.connect socket (List.hd_exn addresses).Unix.ai_addr
+  >>= fun () ->
+  let finished, notify_finished = Lwt.wait () in
+  let response_handler =
+    Httpun_examples.Client.print ~on_eof:(Lwt.wakeup_later notify_finished)
+  in
+  let headers =
+    Headers.of_list
+    [ "content-length"   , (Int.to_string (String.length body))
+    ; "connection"       , "close"
+    ; "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 `POST "/")
+  in
+  Body.Writer.write_string request_body body;
+  Body.Writer.close request_body;
+  finished
+;;
+
+let () =
+  let host = ref None in
+  let port = ref 8080 in
+
+  Arg.parse
+    ["-p", Set_int port, " Port number (8080 by default)"]
+    (fun host_argument -> host := Some host_argument)
+    "lwt_get.exe [-p N] HOST";
+  let host =
+    match !host with
+    | None -> failwith "No hostname provided"
+    | Some host -> host
+  in
+  Lwt_main.run (main !port host)
+;;