What does the file you are transferring look like? In particular, does it contain DOS-style (CR/LF) or Unix-style (LF) line endings? There are several parts of this process that will try to fix the line endings, and if the file doesn't look how they expect, they may truncate lines. In this case they are expecting DOS-style CR/LF line endings.

Beyond that, it could be Net::FTP screwing up the file, the underlying I/O libraries, or the FTP server. Using a packet sniffer to look at what's being sent across the wire would be a good way to see if the client is behaving correctly. A debugger would be the easiest way to see whether it's the I/O library or the FTP module.

Is there a reason you don't want to transfer the file in binary? It's much less error-prone.

Update: Fixed formatting.


--
sgifford's Web page

In reply to Re: Net::FTP and corrupted uploads by sgifford
in thread Net::FTP and corrupted uploads by wfsp

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.