Manlio Perillo wrote:
John Goerzen ha scritto:
On Thu, Jan 08, 2009 at 10:36:32AM -0700, John A. De Goes wrote:
[...]
On the other hand, I see nothing in Haskell that would prevent its use
for any of your purposes. There are numerous high-level web
infrastructures already. Perhaps they are more or less suited to your
needs, but that's a library issue, not a language issue.
The question is not about Haskell language.
I think that Haskell is far better than Erlang, and in fact I'm studying
Haskell and not Erlang; and one of the reason I choosed Haskell is for
its support to concurrency.
The problem, IMHO, is with the availability of solid, production ready
servers implemented in Haskell, that can be used as case study.
The major web framework in Haskell is HAppS, if I'm correct, and yet in
the HAppS code I see some things that make me worry about the robustess
of the code.
[--snip--]
Indeed. I've been looking for a Haskell HTTP server implementation that
can actually handle file serving using strictly limited memory (for a
simple UPnP server, as of yet unreleased) and that also doesn't leak
handles like a sieve, but I haven't found anything yet. I don't know,
maybe my hackage-foo is lacking. In the end I just rolled my own
implementation using the HTTP package for parsing requests and doing all
the socket I/O myself using low-level primitives. It seemed to be the
only way to guarantee reasonable resource usage while serving
multi-gigabyte files to fickle HTTP clients that like to drop
connections willy-nilly.
Don't get me wrong -- the socket support is pretty decent, but there are
also some weird idiosyncrasies, for example requiring that the PortNum
is specified in network byte order and lacking a function to convert
host->network byte order (hton).
Oleg's Iteratee does look very interesting though. Maybe I'll have a go
at trying to use his ideas in my UPnP server.
Cheers,
Bardur Arantsson
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