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digitalmars.D - [Phobos] A new constructor is needed in std.socket.Socket

reply Dejan Lekic <dejan.lekic gmail.com> writes:
It is IMHO very important to have a constructor in std.socket.Socket which
takes a FILE DESCRIPTOR as an argument and makes socket out of it.

There are several reasons for this, and UNIX developers can most likely come
with hundreds of possible use-cases.

I, for an instance, have encountered this problem while I was working on an
upcomming FastCGI interface for D, which is ~65% done. It works when FastCGI
application opens socket, and listens on it, but not when server opens a UNIX
domain socket and spawns FastCGI application, for exactly the same reason why I
am posting this text. Web server (lighttpd in my case) closes all file
descriptor of a FastCGI application, and leaves only 0. 0 is commonly used as
STDIN, but in this case it is not. It is actually a UNIX domain socket which
FastCGI application has to MAKE, and listen for web-server connections. Yes,
web-server is a client to the FastCGI application.

This approach is so good and effective, that some big websites are using
lighttpd because it's excellent (built-in) support for FastCGI. This makes it
very easy to have load balancing, because FastCGI applications can run on
remote server(s) as well.

Anyway, we will soon have it, because I'll naturally release it under some
open-source license, most likely BSD.

Yes, I had to subclass Socket and add this new constructor to the FastCgiSocket
class, but I <b><u>really</u></b> think this is something that should be in the
std.socket.Socket by default.

This is just one Phobos issue I have and would like to have improved. That was
the reason I asked few days ago for a new discussion group, because I do not
want to "pollute" general digitalmars.D newsgroup with Phobos related issues.

PS. I know there is already FastCGI interface for D. The only difference
between my implementation and that one is that my FastCGI interface is native
D, while that one is, as far as I know, a binding to libfcgi.

Kind regards

Dejan
May 24 2007
parent reply Regan Heath <regan netmail.co.nz> writes:
Dejan Lekic Wrote:

 It is IMHO very important to have a constructor in std.socket.Socket which
takes a FILE DESCRIPTOR as an argument and makes socket out of it.


Isn't it sufficient to have a setter method to set the handle?

Something to go with the existing getter method that returns the raw socket
handle:

socket_t handle(); 
  Get underlying socket handle. 

Once you had that you could subclass (as you have done) calling the setter in
your constructor, no?

Regan
May 24 2007
parent reply Dejan Lekic <dejan.lekic gmail.com> writes:
Yes, it is sufficient.

Regards
May 24 2007
parent Regan Heath <regan netmail.co.nz> writes:
Dejan Lekic Wrote:

 Yes, it is sufficient.


In that case I reackon that's what we want added.  Both ways work but this one
seems to make more sense to me.  What do you reckon?

Regan
May 24 2007