gunzip problem

[mevasquez]

I have a file that I have downloaded using a perl script and the file is in .gz format. The command I am using to gunzip the file is

system("gunzip -f" . $localfile);  # file name is $file.log.gz
substr($localfile, -3) = "";   #remove the ".gz" from $localfile name

Sometimes this works and sometimes it does not. I don't know why. It was working great for awhile and then all of a sudden I started getting the error.


gunzip: file.log.gz: invalid compressed data--crc error

gunzip: gfile.log.gz: invalid compressed data--length error

What could be causing this problem? I even get this error when doing the command manually.

TIA
Mike V.

 

[zephan]

Hi Mike,
Do you download with FTP. I know using ascii mode with binary files can cause this.
Regards,
Zephan

 

[mseth]

I agree. Those errors look like a file transmission error (CRC failed) and perhaps the file didn't even transfer 100% (length error).

 

[mevasquez]

Thanks, I will try that with the following script;

use Net::FTP;
my($filetype = "binary");
ftp = Net::FTP->new($hostname, Timeout => 30, debug => 1)
         or die ("Can't connect: $@\n");
$ftp->login($username, $passwd)
  or die "Could not login!";
$ftp->$filetype;

 

[mevasquez]

Opps, the corrected script.

use Net::FTP;
[COLOR=red]my($filetype) = "binary"; [/color]
ftp = Net::FTP->new($hostname, Timeout => 30, debug => 1)
         or die ("Can't connect: $@\n");
$ftp->login($username, $passwd)
  or die "Could not login!";
$ftp->$filetype;

This worked.

Thanks.

Mike V.