rbc conjectures:

I suspect that server is hanging on this line ... 

       my $C = join ('', <Client>);

[download]
Why is it hanging and how do I stop it from hanging?

You're doing a blocking read from <Client> in an array context. That tries to slurp every line until EOF into memory, before doing the join. This makes the socket wait for the Client to close its connection, before joining and then trying to write something back to the Client. This is most likely not what you want.

You probably want to try something more like this:

my $C = <Client>;

[download]
If you want to get multiple lines, you need to tell the server how many lines to expect, or it'll wait until it gets "all the lines" which probably just means "hang forever."

Update: You may also want to turn on autoflush in the server (if it's not on already; I'm not up to speed with traditional socket() calls instead of IO::Socket) or your client might hang waiting for the unflushed server output.

Alan

In reply to Re: Bi directional Socket question by ferrency
in thread Bi directional Socket question by rbc

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.