05-17-2010
The reason is quite simple: the HTML page is only displayed in your browser. There's nothing executed outside. And whenever the browser access a local file it only reads it. No execution, no interpreting, ...
And that's a good thing too. Imagine, if you will, a malicious site tricks you into downloading a shell script. Nothing fancy, just a simple "rm -f" or a small fork bomb. All it then needed to do would be to provide you with a link to that script (simply done with JS for example), have the browser execute it, and BOOM.
As for the "permissions" issue: a small webserver like
lighttpd can be set up in a matter of minutes, including CGI support.
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LEARN ABOUT DEBIAN
html::display
HTML::Display(3pm) User Contributed Perl Documentation HTML::Display(3pm)
NAME
HTML::Display - display HTML locally in a browser
SYNOPSIS
use strict;
use HTML::Display;
# guess the best value from $ENV{PERL_HTML_DISPLAY_CLASS}
# or $ENV{PERL_HTML_DISPLAY_COMMAND}
# or the operating system, in that order
my $browser = HTML::Display->new();
warn "# Displaying HTML using " . ref $browser;
my $location = "http://www.google.com/";
$browser->display(html => $html, location => $location);
# Or, for a one-off job :
display("<html><body><h1>Hello world!</h1></body></html>");
DESCRIPTION
This module abstracts the task of displaying HTML to the user. The displaying is done by launching a browser and navigating it to either a
temporary file with the HTML stored in it, or, if possible, by pushing the HTML directly into the browser window.
The module tries to automagically select the "correct" browser, but if it dosen't find a good browser, you can modify the behaviour by
setting some environment variables :
PERL_HTML_DISPLAY_CLASS
If HTML::Display already provides a class for the browser you want to use, setting "PERL_HTML_DISPLAY_CLASS" to the name of the class will
make HTML::Display use that class instead of what it detects.
PERL_HTML_DISPLAY_COMMAND
If there is no specialized class yet, but your browser can be controlled via the command line, then setting "PERL_HTML_DISPLAY_COMMAND" to
the string to navigate to the URL will make HTML::Display use a "system()" call to the string. A %s in the value will be replaced with the
name of the temporary file containing the HTML to display.
%HTML::Display::os_default
The hash %HTML::Display::os_default contains pairs of class names for the different operating systems and routines that test whether this
script is currently running under it. If you you want to dynamically add a new class or replace a class (or the rule), modify %os_default :
# Install class for MagicOS
$HTML::Display::os_default{"HTML::Display::MagicOS"}
= sub { $^O =~ qr/magic/i };
__PACKAGE__->new %ARGS
$browser->display( %ARGS )
Will display the HTML. The following arguments are valid :
base => Base to which all relative links will be resolved
html => Scalar containing the HTML to be displayed
file => Scalar containing the name of the file to be displayed
This file will possibly be copied into a temporary file!
location (synonymous to base)
If only one argument is passed, then it is taken as if
html => $_[0]
was passed.
EXPORTS
The subroutine "display" is exported by default
COMMAND LINE USAGE
Display some HTML to the user :
perl -MHTML::Display -e "display '<html><body><h1>Hello world</body></html>'"
Display a web page to the user :
perl -MLWP::Simple -MHTML::Display -e "display get 'http://www.google.com'"
Display the same page with the images also working :
perl -MLWP::Simple -MHTML::Display -e "display html => get('http://www.google.com'),
location => 'http://www.google.com'"
AUTHOR
Copyright (c) 2004-2007 Max Maischein "<corion@cpan.org>"
LICENSE
This module is released under the same terms as Perl itself.
perl v5.10.1 2007-10-20 HTML::Display(3pm)