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# 1  
Old 03-28-2008
Getting error
I'm trying to have a cgi script use a string from the window location in a template file. When I run the script I get Internal Server Error and when I go to my control panel error log it says Premature end of script headers. I was wondering if some experienced programmer would take a look at it and see what is wrong with it:

#!/usr/bin/perl -w

use CGI qw(:all);
use strict;

my $info;

if($info = param("info")){

print<<EOF;
<html>
<head>
<title>Template</title>
</head>
<body>
<!--#include virtual="index.cgi?i=epl&w=$info" -->
</body>
</html>

EOF

}else{

# Default stuff
<html>
<head>
<title>Template</title>
</head>
<body>
No result
</body>
</html>
}



Thank you, marringi
# 2  
Old 03-29-2008
That's usually an indication that you have a syntax error in the script.

And sure enough:

Code:
vnix$ perl -c /tmp/cgi
Bareword found where operator expected at /tmp/cgi line 27, near "<title>Template"
	(Missing operator before Template?)
Bareword found where operator expected at /tmp/cgi line 28, near "</head"
  (Might be a runaway multi-line // string starting on line 27)
	(Missing operator before head?)
Semicolon seems to be missing at /tmp/cgi line 29.
syntax error at /tmp/cgi line 26, near "head>"
Search pattern not terminated at /tmp/cgi line 32.

There's a wrapper module for CGI which displays these types of errors on the generated page instead of that dreaded 500 Internal Server Error. You should probably use that at least while developing. (Search for "errors to browser"; can't remember what the thing is called ... ah, here: use CGI::Carp qw/fatalsToBrowser/;.)
# 3  
Old 03-29-2008
Hi and thanks for the response

The thing is that I don't really know anything about perl programming. I'v tried to change some things in response to this, but with no luck. Do you have any idea what it is that needs to be done?

thank you
# 4  
Old 03-29-2008
You're lacking a "print <<EOF" (and the corresponding EOF) inside the else part. Perl is seeing your bare HTML code and expecting it to be in Perl syntax, which obviously it's not.
# 5  
Old 03-29-2008
Of course, it would make sense to factor out the duplication and concentrate on getting the variable part into a variable.

Code:
#!/usr/bin/perl -w

use CGI qw(:all);
use strict;

my $info;
my $response;

if($info = param("info")){
  $response = '<!--#include virtual="index.cgi?i=epl&w=$info" -->';
} else {
  $response = 'No result';
}

print<<EOF;
<html>
<head>
<title>Template</title>
</head>
<body>
$result
</body>
</html>
EOF

I hope I didn't overlook some difference between the two parts. (One of the reasons you should avoid duplication!)
Last edited by era; 03-29-2008 at 08:37 AM.. Reason: Forgot to declare "my $response;"
# 6  
Old 03-29-2008
Thanks for the quick response.

I tried this but I got this error:

Software error:

Can't find string terminator "EOF" anywhere before EOF at team.cgi line 15.

Any idea what this means?
# 7  
Old 03-29-2008
You made a typo? Or forgot to read the whole reply?

Code:
print <<EOF;
Random text goes here
EOF

You're missing that last line there and it's telling you precisely that.
 
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