Well, I don't know why it's failing (you didn't show us the code that reads the data for instance), but I do know this is going to fail if you are getting two requests in a short time. The first thing that happens when you open the file for write is that it's getting truncated. What if another instance is reading from the file? What if another instance is also writing? Your data will get corrupted. Also, you open the file, and you don't check the return value. What if the file cannot be opened? Same for the close, you might get an error here (disk full, for instance). You don't check.

Abigail


In reply to Re: Datafile doesn't update before being read by Abigail-II
in thread Datafile doesn't update before being read by ghopper

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.