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How can I strip javascript

HR
Novice

Feb 3, 2001, 3:05 PM

Post #1 of 6 (4380 views)

How can I strip javascript	Can't Post

from a file I am copying? Want to take an onload command out of the body tag. This does not seem to work:

if (-e "$basedir/$board/messages/$number.$ext") {
open (COPY, "$basedir/$board/messages/$number.$ext");
@file = <COPY>;
foreach $line (@file) {
if ($line =~ / onLoad="loadFormFields()">$/i) {
$line =~ s/ onLoad="loadFormFields()">$/>/i;
}
}
}

Jasmine
Administrator

Feb 3, 2001, 3:32 PM

Post #2 of 6 (4378 views)

Re: How can I strip javascript [In reply to]	Can't Post

You need to escape the parentheses.

Code

if ($line =~ / onLoad="loadFormFields\(\)">$/i) { 
    print "\n\nBefore: $line\n"; 
    $line =~ s/ onLoad="loadFormFields\(\)">$/>/i; 
    print "After: $line\n"; 
}

Parentheses are used for alternations like (this|that). Example:

Code

$line = 'that yay perl'; 
  
print "Before: $line\n";  #prints "that yay perl" 
$line =~ s/(this|that)//i; 
print "After:  $line\n";  #prints "yay perl"

HR
Novice

Feb 3, 2001, 4:00 PM

Post #3 of 6 (4376 views)

Re: How can I strip javascript [In reply to]	Can't Post

Thank you, that worked. Followup question...... I also need to remove everything following a (!--stop--)* comment line and replace it with (/body)(/html), this approach is not doing what I had hoped, any suggestions?

foreach $line (@file) {

if ($line =~ /(!--stop--)/) {
$line =~ s/$'/(\/body)(\/html)/;
}

}

* Had to substitute parenthesis in place of html brackets so they would show up

Jasmine
Administrator

Feb 4, 2001, 2:13 PM

Post #4 of 6 (4370 views)

Re: How can I strip javascript [In reply to]	Can't Post

Remove the $ at the front of the regex. $ means to match at the end of the line. ^ means to match at the beginning of the data.

$line = '';

$line =~ s||</body></html>|;

print $line; # prints </body></html>

You may want to check out the following 2 articles in the Learning Center (from the Perl manual):

Perl Regular Expressions - Quick Start
Perl Regular Expressions - Expanded Tutorial

japhy
Enthusiast / Moderator

Feb 5, 2001, 6:32 AM

Post #5 of 6 (4366 views)

Re: How can I strip javascript [In reply to]	Can't Post

No, jasmine, he was using the $' variable, or the $POST_MATCH. In other words, he wants to remove everything after the ";
$EOS = index($string, $marker) + length($marker);
substr($string, $EOS) = "</body></html>";

Jeff "japhy" Pinyan -- accomplished hacker, teacher, lecturer, and author

Jasmine
Administrator

Feb 5, 2001, 8:08 AM

Post #6 of 6 (4365 views)

Re: How can I strip javascript [In reply to]	Can't Post

Looks like I missed that lil apostrophe, didn't I? [grin]

Sorry about that confusion.

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