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From: Oliver Bandel <oliver@first.in-berlin.de>
To: Alan Schmitt <alan.schmitt@polytechnique.org>
Cc: OCaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] https and Ocamlnet
Date: Sun, 29 Dec 2019 14:42:41 +0100
Message-ID: <20191229134240.censvvrki4xliexz@first.in-berlin.de> (raw)
In-Reply-To: <87impglc4p.fsf@polytechnique.org>

Quoting  Alan Schmitt <alan.schmitt@polytechnique.org> (snt: 2019-09-25 15:49 +0200 CEST) (rcv: 2019-09-25 15:49 +0200 CEST):
> Hello,
> 
> I have a small utility that downloads and parses the RSS feed from
> ocaml.org to include in the OCaml Weekly News, but a recent change to
> ocaml.org broke it: it seems to only be served through https. I tried to
> add a TLS provider, but it's still failing with a cryptic error message.
> 
> Here is an extract of the code showing the problem:
> 
> #+begin_src ocaml
> let () = Nettls_gnutls.init()
> 
> let site = "https://ocaml.org"
> let feed_name = "/feed.xml"
> 
> let planet = Nethttp_fs.http_fs site
> let feedic = planet # read [] feed_name
> let feed_string = Netchannels.string_of_in_obj_channel feedic
> let () = feedic # close_in()
> #+end_src
> 
> I can compile it with
> 
> ocamlfind ocamlc -o test -linkpkg -package netclient,nettls-gnutls test.ml
> 
> but when I run it, I get this error
> 
> Fatal error: exception Nettls_gnutls.TLS.Error(GNUTLS_E_PUSH_ERROR)
> 
> I know nothing of TLS and searching for the error did not point me
> toward any solution.
> 
> I'm using gnutls 3.6.9 and ocamlnet 4.1.6.
> 
> How can I access the site using https?
> 
> Thanks,
> 
> Alan

Someone else had explored the problem with gnutls and
GNUTLS_E_PREMATURE_TERMINATION:

Missing "Content-Length" header results in "The TLS connection was non-properly terminated"
  https://github.com/varnish/hitch/issues/127

Maybe that can help to find a solution here.

IMO it's good to have a library throwing an error / raising an exception
instead of ignoring it, but as user of that library it should be possible to catch it.

Don't know how to catch that exception with ocamlnet's Nettls_gnutls in
a convenient way.
If someone finds a solution to get the already read data even though the
exception was raised by gnutls/ocamlnet, please send it to the list.

Ciao,
  Oliver


      parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-25 13:49 Alan Schmitt
2019-09-25 14:52 ` Christophe TROESTLER
2019-09-25 15:47 ` Gerd Stolpmann
2019-09-26  6:20   ` Alan Schmitt
2019-09-26  6:27     ` Christophe TROESTLER
2019-09-26  6:56       ` Alan Schmitt
2019-09-26 13:42         ` Simon Cruanes
2019-09-26 15:45           ` Gerd Stolpmann
2019-09-27  6:32           ` Alan Schmitt
2019-09-27 13:54             ` Simon Cruanes
2019-09-26 14:39         ` Adrien Nader
2019-09-25 17:38 ` Oliver Bandel
2019-12-29 13:42 ` Oliver Bandel [this message]

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