learn sth.

Delfer has asked for the wisdom of the Perl Monks concerning the following question:

Hi perlmonks,
I have no experience on socket programming. I decided to learn it through Learning Perl, because I like Perl indeed.
My first question is: What is timeout? And how do I config and process it?
The second: The statement if(SOCKET->opened) appears in someone's script. I can not find any help on opened() function in the documents with ActivePerl 5.6.
Does it return whether the SOCKET is in existence?
Pardon my puerile questions and immature English.
Thank you.

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RE: learn sth. by gryng (Hermit) on Jul 28, 2000 at 21:13 UTC
You may want to check out the documentation about the higher level socket routines, they can really make network programming easier. Check out Perl interprocess computing (scroll down to the sockets section) They start off using the lower level stuff, then medium, and finally finish off with the high level stuff. Also GO Arena version 0.1a (shameless plug), has a sample server and client code... granted there is alot of other stuff in there, but all the network oriented code for the server is at the bottom of the file and not spread out all over the place. Enjoy, Gryn	[reply]
RE: learn sth. by autark (Friar) on Jul 28, 2000 at 21:17 UTC
`SOCKET->opened()` is a method inherited from IO::Handle. So if you 'use IO::Handle' you may use its methods on your handles. You might find it much easier to use the IO::Socket module to do socket programming. Autark.	[reply] [d/l]
Re: learn sth. by perlmonkey (Hermit) on Jul 28, 2000 at 21:20 UTC
I think the 'opened' routine is inherited from the IO::Handle. Here is what it says: `$io->opened Returns true if the object is currently a valid file descriptor.` [download]	[reply] [d/l]