Here's what I found. Make sure that you run it with -T on the cmdline. I left out the csv section to concentrate on CGI. 
#!/usr/bin/perl -lT

use strict;
use Fcntl qw/:DEFAULT :flock/;
use CGI::Carp qw/fatalsToBrowser/;
use CGI qw/:standard -private_tempfiles/;

$CGI::POST_MAX = 1024 * 1024 * 50;
$CGI::DISABLE_UPLOADS = 0;

use constant UPLOAD_DIR     => '/tmp';
use constant BUFFER_SIZE    => 16384;
use constant MAX_DIR_SIZE   => 1024 * 1024 * 100;
use constant MAX_OPEN_TRIES => 100;

my $q = new CGI;
print $q->header( "text/html", -expires => "-1s" ),
  $q->start_html(
    -title   => "Wordcloud Generator",
    -bgcolor => "#ffffff",
    -head    => $q->meta(
        {
            -http_equiv => 'Pragma',
            -content    => 'no-cache'
        }
    )
  ),
  $q->h2("Wordcloud Generator"),
  $q->hr,
  $q->p( "Processed file:", my $file ),
  $q->end_html;

my $in = $q->upload('file');
$in = param('upload');
if (not $in && cgi_error()) {
    print $q->header(-status => cgi_error());
    exit 0;
}

[download]

In reply to Re: Uploading and reading file by Khen1950fx
in thread Uploading and reading file by Anonymous Monk

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.