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CGI does not work properly

Medium Priority
205 Views
Last Modified: 2013-12-25
Hi, I am very new to Perl and HTML. I am currently creating a guestbook using html. If the user clicked on the submit button, I will called my perl file to check whether they have entered all the necessary fields.

If the form is not complete, I will then display another redopage html informing them.

But my redopage html does not get shown up. Is it possible for the perl to open up another html???

Below is my perl file which only consists of the calling part, but still the html does not get showed up. Did I miss out any library??? I am actually running it in Windows NT.

/*** my *.pl file ***/

use CGI;

$redopage="/olticket/jonr&d/redopage.html";
$redo;

sub redo
{
      print (REDOPAGE $redopage);
      while (<REDOPAGE>)
      {
           print $_;
      }
      Close(REDOPAGE);
      exit;
}
Could anyone please help.

Thank you.

Regards
Yann Ming
Comment
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Commented:
The problem is that you are not opening the file. Try:-

sub redo
{
open (REDOPAGE $redopage);
while (<REDOPAGE>)
   {
   print $_;
   }
close(REDOPAGE);
}

Note that I changes 'print' to 'open'. I removed the 'exit' from the procedure. I changed 'Close' to 'close' (perl is case sensitive).

I think I found all the errors... but if it still does not work get back to me before grading the answer.

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Author

Commented:
I have tried it but it still does not work. I actually put a print statement after calling the redo sub-routine. My message got printed out, but the html just does not got showed up.

Did I miss out some library which I should have included???

Regards
Yann Ming

Commented:
Before you print out the contents of the html, you should print the following: "Content-type: text/html\n\n".  Did you include that?
icd

Commented:
faster is quite right is stating that the Content-type has to be output but this would not explain why the file is not output.

The next most likely explaination is that the path to the file is wrong. The path you gave seems to be one relative to your web page root directory. This will not be the path if you (for example) telnet into the site. Assuming that your script is in the cgi-bin directory try changing the path to a relative path name, e.g.

$redopage="../olticket/jonr&d/redopage.html";

(or whatever is appropriate).

You can also put some diagnostics into your file. e.g.

open (REDOPAGE $redopage) || die "<HTML><HEAD><BODY>Cannot open file $redopage reason $!</BODY></HTML>\n";

(this should all be on one line).


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