Hi, Dr Leonard
Thank you for the suggestions.
I design my library using functor and start to appreciate how functor helps to
abstract design and easily target different backend (Unix, Xen).
I still have two questions which are related to OS dependency.
1. How could I know if a library has any OS dependency? Do I need to read their
source code, or there is a easier way I don’t know?
2. Is there any good crypto library (e.g. generating nonce, calculating
HMAC_SHA1) that can be used on Mirage? I am using Cryptokit on my unix machine.
It seems like I cannot use it in Mirage. Reason is here
(https://github.com/msimon/cryptokit/blob/master/src/cryptokit.mli#L233). You
may realize this problem is actually the reason I asked my first question.
Thank you!
---
Runhang Li
University of California, Los Angeles
On Fri, May 15, 2015 at 9:39 AM, Thomas Leonard <[email protected]> wrote:
> On 15 May 2015 at 07:48, Runhang Li <[email protected]> wrote:
>> Hi,
> Hi Runhang,
>> I am writing a better Twitter API library because it is impossible for one
>> to use current Twitter library (https://github.com/yoshihiro503/ocamltter/)
>> if he wants to make a Mirage unikernel.
>>
>> I have two questions.
>>
>> 1. What exactly are the limitation for the libraries I can use when writing
>> code? Based on what I know, I feel like I cannot use any library that is
>> OS-dependent? For example, can I use Lwt_unix.sleep?
> Correct; you cannot use Unix, Lwt_unix, etc. In Mirage, you can use
> OS.Time.sleep instead of Lwt_unix.sleep.
> Sometimes an existing library can be modified easily (e.g. by moving
> non-Unix code into a separate "core" module), so it might be worth
> trying that first.
> You should also try to avoid using C libraries where possible. e.g.
> you'd want to replace curl with cohttp here.
>> 2. Since the unikernel needs to make HTTPS request, I'd like to try out
>> OCaml-TLS. Is there any recommendation for a good example that can
>> illustrate how to use that? What aspects should I be careful of when using
>> it?
> There are some examples in the tls repository:
> https://github.com/mirleft/ocaml-tls/tree/master/mirage/example
> I think there will be more information soon, as I see various
> TLS-related releases being prepared.
>> All questions and suggestions would be very welcomed.
> --
> Dr Thomas Leonard http://roscidus.com/blog/
> GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA
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