Re: ocaml-dns

[Richard Mortier <Richard.Mortier@xxxxxxxxxxxxxxxx>]

hi anastasia;

On 18 Mar 2013, at 03:45, Anastasia Gornostaeva wrote:

> It seems Dns does not provide any way to connect to DNS server and resolve
> any queries. Am I wrong?
> 
> I've found Dns_resolver for using with lwt, but it absents by default (even in
> opam installation). Should I re-implement Dns_resolver for plain networking?

we use Lwt for the networking here, so we never did one for "plain networking". 
when you say "absents by default", what do you mean? if you have the necessary 
libraries installed, do a "make distclean" and then "make" it should cause the 
oasis setup to run with --enable-tests and --enable-lwt which causes mldig to 
be built, giving a simple command line client. let me know if it doesn't work.

(fwiw using 4.00.1 system compiler on osx, i had to "opam install cstruct re 
lwt cmdliner cryptokit uri" before i got a build working; but it did work once 
i installed those libs.)

really, the thing to do would be to follow the pattern that's being taken with 
cohttp -- see eg., https://github.com/yallop/ocaml-cohttp. that is, create a 
client monad that abstracts over specific backends (Lwt, Core, etc) and can 
encapsulate the (somewhat complex) logic that a DNS client has to implement. 
this would go into the lib/ directory, and there would then be specific client 
instantiations client_lwt/ client_core/ and so on.

-- 
Cheers,

R.




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