Thanks for the feedback! I appreciate the response...but I guess I was not clear with my desired outcome...I am using this: http://demos.telerik.com/kendo-ui/web/progressbar/index.html. Which will definitely handle everything for me as you suggested with ProgressBar (javascript library).

My main concern is actually with the mechanics of the loop that will supply the updated progress. I need to start execution, then (in a loop) periodically send the progress updates through a web socket message...until the program finishes.

I know I can kick off execution with open3 or run3, and then watch STDOUT from that program...but how do I break out of the loop? I guess I am not very familiar with how those libraries handle the file handles for STDOUT/ERR.

I wonder if something like this would work as intended?

...
run3 "somecommand -i somefile -o someoutputfile", $stdout, $stderr;
while(my $line = <$stdout>) {
  if($line =~ m/Progress: (\d+) lines processed/) {
    # Assume that $ws is the web socket object I have created and will
+ allow for the message to be sent...
    $ws->send($1);
  }
}

[download]

In reply to Re^2: capture periodic updates from external program by mabossert
in thread capture periodic updates from external program by mabossert

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.