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Re: Perl Issue - File downloaded in windows has a Control M character in it??

by aitap (Deacon)
on Oct 24, 2012 at 19:08 UTC ( #1000692=note: print w/ replies, xml ) Need Help??


in reply to Perl Issue - File downloaded in windows has a Control M character in it??

After our troubleshooting, we found out that the file downloaded by newer version come with empty rows between data, since the .csv files came with spaces (empty rows), it is not being processed and fails.
If a UNIX-newlined text file is read as DOS-newlined textfile, it looks like there is no newlines at all because DOS newline is "\r\n" when UNIX newline is just "\n".

So there is no way of empty lines appearing because of UNIX-newlined file being viewed as DOS-newlined. Can you provide a small hexdump of a damaged file?

Sorry if my advice was wrong.


Comment on Re: Perl Issue - File downloaded in windows has a Control M character in it??
Re^2: Perl Issue - File downloaded in windows has a Control M character in it??
by Anonymous Monk on Oct 24, 2012 at 19:37 UTC
    what is hexdump? we are working on windows... when i used the command call unix2dos, i am getting the output i needed...but i cant use the unix2dos utility...all i need to do is using perl only...
      Hexdump is a hexadecimal representation of bytes in a file. You can obtain it by running something like this:
      open my $f,"<:raw","file.csv" || die $!; my $c; for (1..8) { for (1..16) { read $f,$c,1 || exit 0; print unpack "H2",$c; } print "\n"; }
      You can rewrite unix2dos in Perl using PerlIO :crlf output layer.
      Sorry if my advice was wrong.

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