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"Hello web" please
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Date: 2006-07-10 (15:02)
From: Jonathan Hayward http://JonathansCorner.com <christos.jonathan.hayward@g...>
Subject: Re: [Caml-list] "Hello web" please 
I need help getting Ocamlnet to work at a basic level.

I tried running the script from the command-like to more easily access
diagnostic output. What should the shebang line say? Right now I have the
following (mostly) paste of the demo script, plus shebang line; when I run
it from within apache I get an internal server error. (A copy of the command
line output follows the script).

--

#!/usr/local/bin/ocaml
open Netcgi

let text = Netencoding.Html.encode_from_latin1
  (* This function encodes "<", ">", "&", double quotes, and Latin 1
     characters as character entities.  E.g. text "<" = "&lt;", and
     text "ä" = "&auml;" *)

(* Normally you would use a template system instead of this *)
let html_page (cgi:cgi) title html =
  let out = cgi#out_channel#output_string in
  out "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \
        \" http://www.w3.org/TR/REC-html40/strict.dtd\">\n";
  out ("<html>\n<head><title>" ^ text title ^"</title></head>
<body>\n");
  out html;
  out "</body>\n</html>"

let main (cgi:cgi) =
  cgi#set_header
    ~cache:`No_cache
    ~content_type:"text/html; charset=\"iso-8859-1\""
    ();
  let foo = cgi#argument_value "foo"
  let html = match foo with
    | "1" -> "Yes"
    | "0" -> "No"
    | _ -> "Undefined" in
  html_page cgi foo html

(* You can buffer or not the output.  If buffered you can rollback
   (useful in case of error). You can replace Netcgi_cgi.run by
   another connector entry point (FCGI, SCGI, AJP, Apache mod). *)
let () =
  let buffered _ ch = new Netchannels.buffered_trans_channel ch in
  Netcgi_cgi.run ~output_type:(`Transactional buffered) main


--

Couldnt get a file descriptor referring to the console
Could not get a file descriptor referring to the console
./demo.ml: line 4: let: =: syntax error: operand expected (error token is
"=")
./demo.ml: line 5: demo.ml: command not found
./demo.ml: line 6: characters: command not found
./demo.ml: line 7: text: command not found
./demo.ml: line 9: demo.ml: command not found
./demo.ml: line 10: syntax error near unexpected token `('
./demo.ml: line 10: `let html_page (cgi:cgi) title html ='


--

On 7/8/06, Christophe TROESTLER <Christophe.Troestler@umh.ac.be> wrote:
>
> On Sat, 8 Jul 2006, "Jonathan Hayward http://JonathansCorner.com" <
> christos.jonathan.hayward@gmail.com> wrote:
> >
> > I'm trying to figure out how to use CamlGI with OCaml, [...]
>
> CamlGI code has been integrated into the Netcgi component
> <https://gps.dynxs.de/wwwsvn/trunk/code/src/netcgi/?root=lib-ocamlnet2>
> of OcamlNet-2 <https://gps.dynxs.de/openapps/svnindex.cgi>, please use
> that instead.
>
> > [...] script that [...] prints a webpage saying only "Yes", "No",
> > "Other" or "Undefined" depending on whether the CGI variable "foo"
> > has value 1, 0, some other defined value, or is undefined (never
> > mind about multiple values)?
>
> You can find examples in the examples/ directory (add.ml is a very
> simple one).  As for the specific example you desire, it is attached.
> It is maybe a bit more complex that you expected because it
> demonstrates additional features (text escaping, setting the header,
> buffered output).
>
> Hope it helps,
> ChriS
>
>
> open Netcgi
>
> let text = Netencoding.Html.encode_from_latin1
>   (* This function encodes "<", ">", "&", double quotes, and Latin 1
>      characters as character entities.  E.g. text "<" = "&lt;", and
>      text "ä" = "&auml;" *)
>
> (* Normally you would use a template system instead of this *)
> let html_page (cgi:cgi) title html =
>   let out = cgi#out_channel#output_string in
>   out "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \
>         \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n";
>   out ("<html>\n<head><title>" ^ text title ^"</title></head>
> <body>\n");
>   out html;
>   out "</body>\n</html>"
>
> let main (cgi:cgi) =
>   cgi#set_header
>     ~cache:`No_cache
>     ~content_type:"text/html; charset=\"iso-8859-1\""
>     ();
>   let foo = cgi#argument_value "foo"
>   let html = match foo with
>     | "1" -> "Yes"
>     | "0" -> "No"
>     | _ -> "Undefined" in
>   html_page cgi foo html
>
> (* You can buffer or not the output.  If buffered you can rollback
>    (useful in case of error). You can replace Netcgi_cgi.run by
>    another connector entry point (FCGI, SCGI, AJP, Apache mod). *)
> let () =
>   let buffered _ ch = new Netchannels.buffered_trans_channel ch in
>   Netcgi_cgi.run ~output_type:(`Transactional buffered) main
>
>
>


-- 
++ Jonathan Hayward, jonathan.hayward@pobox.com
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