View a log file at 50 lines at a time.

I know this is almost the same as the question about 700 lines, but I would like someone to help me have it do more. How do I have it load 50 lines of a document, have it create a button (submit) that I could click on then it load the next 50, and so on and so on.

thanks
Perl_ManAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

malecCommented:
same thing (almost):

while( <FILE> ){
   push @a,$_;
   next if @a < 50;
#process your 50 lines here

   print <TT;
     <form method="POST">
     <input type="submit" value="Next 50 lines"
     </form>
TT

   @a = ();
  }
  do the rest here
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Perl_ManAuthor Commented:
where do i put the file name?
0
malecCommented:
open (FILE, "/usr/people/myfile") || die "Cannot open $!";

while( <FILE> )
{

...
0
Exploring ASP.NET Core: Fundamentals

Learn to build web apps and services, IoT apps, and mobile backends by covering the fundamentals of ASP.NET Core and  exploring the core foundations for app libraries.

Perl_ManAuthor Commented:
thanks, let me test it out.  then if it works u get the credits.
0
Perl_ManAuthor Commented:
this is what I have on my site and it gives me an 500 Internal Server Error message (from my browser....

if ($command eq 'ViewFullLog') {
print "Content-type: text/html\n\n";
print "<html>\n";
print "<head><title>View the log</title></head>\n";
print "$body\n";

open (FILE, "/cgi-bin/FullLog.txt") || die "Cannot open $!";
while( <FILE> ){
      push @a,$_;
        next if @a < 50;
        #process your 50 lines here
        print <TT;
              <form method="POST">
              <input type="submit" value="Next 50 lines"
              </form>
        TT
      print "</body></html>\n";
        @a = ();

exit;
}
0
ozoCommented:
print <TT;
should be
 print <<TT;
and the coreesponding TT at the end should be the onle thing on the line
with no blank spaces before or after it.

0
Perl_ManAuthor Commented:
fix that pert, but still coming up with an internal server error message.
0
ozoCommented:
Does it get the same error when $command ne 'ViewFullLog'?
Do you have a close } on your if?
What's in $body?
What if you change
  die "Cannot open $!"
to
  print "Content-type text/plain\n\nCannot open $!\n</body></html>\n"

and
 <input type="submit" value="Next 50 lines"
should probably be
 <input type="submit" value="Next 50 lines">
0
Perl_ManAuthor Commented:
Ok $body holds the <body bg=.... text=.... etc.> i know that is  not the problem since it works fine in all of my other scripts and it worked fine before I added this code.  Also I tried change eq, still made no difference (so I changed it back).  I fixed the form error (missing the >). Still no difference.  Also changed the content-type command.  Still no change, still gettign the Internal Server Error..
0
malecCommented:
Are there any print statements before that code fragment? If there are they should be preceded by print "Content-type: text/html\n\n", which should be your first print.
0
Perl_ManAuthor Commented:
fixed it
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Perl

From novice to tech pro — start learning today.