in reply to Re: file handing
in thread file handing

thanks but i know file handling. the only problem i have am trying to play around it for more knowledge

the problem. is now getting file with zero byte. the debt was someone telling me u cant rename, write, read and check image extension with built in funcation open() that i have to use module like image magick bra bra bra. but i know i can archive this without any single module using only built in function open(). and so far here is my code works well the problem i have now is the file uploaded in zero byte. that means cant open

my $photo = $CGI->param("pic")
my $copydir = 'img';
my ($file_extension) = $photo =~ /([^.]+)$/; #get photo extension 
my $newf = "011190.$file_extension";         #rename photo to its exte
+nsion to keep the original  resolutions of the file 
rename($photo, $newf);
$upload = $CGI->upload("pic");
open ( UPLOADFILE, ">$copydir/$newf");
close UPLOADFILE;

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Re^3: file handing
by karlgoethebier (Abbot) on Sep 23, 2018 at 15:05 UTC
    "... i know file handling...trying to play around it for more knowledge..."

    Sure. No doubt. But now become more modern and try something like use Path::Tiny; path("nose.jpg")->copy("cuke.jpg");. Not tested - guaranteed.

    «The Crux of the Biscuit is the Apostrophe»

    perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'Help

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Re^3: file handing
by Anonymous Monk on Sep 23, 2018 at 17:55 UTC
    You forgot to print $upload to UPLOADFILE: 
    
$upload = $CGI->upload("pic");

open    UPLOADFILE, ">", "$copydir/$newf";
binmode UPLOADFILE;
print   UPLOADFILE $upload; # YOU FORGOT THIS! :-)
close   UPLOADFILE;

    [download]
    Also try these lines at the top of your script to more easily spot any errors: 
    
use autodie;
use CGI::Carp qw(warningsToBrowser fatalsToBrowser);

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      ya ma using warnings to browser. but this problem still occur

      Can't rename(IMG8823.jpg, '011190.jpg'): No such file or directory

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        read PROCESSING-A-FILE-UPLOAD and section Accessing the temp files directly.

        If you use open to create the newfile there is no renaming required.

        #!/usr/bin/perl
use strict;
use warnings;
use CGI;
use File::Copy;
use CGI::Carp 'fatalsToBrowser';

my $q     = CGI->new;
my $photo = $q->param("pic");
my $result;

if ($photo){
  my ($ext) = $photo =~ /([^.]+)$/;
  my $copydir = '/full/path/to/web/img/';
  my $newfile = $copydir."011190.$ext";

  my $upload_fh = $q->upload("pic");
  
  open OUTFILE,'>',$newfile or die "$!";
  binmode OUTFILE;
  while (<$upload_fh>){ # $upload_fh as filehandle
    print OUTFILE;
  }
  close OUTFILE;
  $result = "$photo written to $newfile";
  
  # Alternative using copy

  #my $tmpfile = $q->tmpFileName($upload_fh);
  #if ( copy($tmpfile,$newfile) ){
  #  $result = "File $photo uploaded to $newfile.
  #  Temp file : $tmpfile";
  #} else {
  #  $result = "ERROR copying $tmpfile to $newfile";
  #}
}

print $q->header(),$q->start_html("Upload Test");
print << "HTM";
<h2>File upload</h2>
<div style="background-color:yellow">$result</div><br/>
<form method="post" action="" enctype="multipart/form-data">
Filename: <input type="file" name="pic"/><br/><br/>
<input type="submit"/>
</form>
HTM
print $q->end_html;

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        poj
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