FM / examples

/usr/share/perl5/CGI/examples

Name	Size	Mode	Actions
WORLD_WRITABLE/	-	0755	rm
caution.xbm	741	0644	edit dl rm
clickable_image.cgi	808	0644	edit dl rm
cookie.cgi	2263	0644	edit dl rm
crash.cgi	131	0644	edit dl rm
customize.cgi	2454	0644	edit dl rm
diff_upload.cgi	1595	0644	edit dl rm
file_upload.cgi	1998	0644	edit dl rm
frameset.cgi	2076	0644	edit dl rm
index.html	3487	0644	edit dl rm
internal_links.cgi	1019	0644	edit dl rm
javascript.cgi	3049	0644	edit dl rm
make_links.pl	196	0644	edit dl rm
monty.cgi	2086	0644	edit dl rm
multiple_forms.cgi	1599	0644	edit dl rm
nph-clock.cgi	359	0644	edit dl rm
nph-multipart.cgi	263	0644	edit dl rm
popup.cgi	1024	0644	edit dl rm
save_state.cgi	2311	0644	edit dl rm
tryit.cgi	780	0644	edit dl rm

Edit: /usr/share/perl5/CGI/examples/save_state.cgi (2311B)

#!/usr/local/bin/perl

use CGI;
$query = new CGI;

print $query->header;
print $query->start_html("Save and Restore Example");
print "<H1>Save and Restore Example</H1>\n";

# Here's where we take action on the previous request
&save_parameters($query)              if $query->param('action') eq 'SAVE';
$query = &restore_parameters($query)  if $query->param('action') eq 'RESTORE';

# Here's where we create the form
print $query->start_multipart_form;
print "Popup 1: ",$query->popup_menu('popup1',[qw{red green purple magenta orange chartreuse brown}]),"\n";
print "Popup 2: ",$query->popup_menu('popup2',[qw{lion tiger bear zebra potto wildebeest frog emu gazelle}]),"\n";
print "";
$default_name = $query->remote_addr . '.sav';
print "Save/restore state from file: ",$query->textfield('savefile',$default_name),"\n";
print "";
print $query->submit('action','SAVE'),$query->submit('action','RESTORE');
print "",$query->defaults;
print $query->endform;

# Here we print out a bit at the end
print $query->end_html;

sub save_parameters {
 local($query) = @_;
 local($filename) = &clean_name($query->param('savefile'));
 if (open(FILE,">$filename")) {
	$query->save(FILE);
	close FILE;
	print "State has been saved to file $filename\n";
	print "If you remember this name you can restore the state later.\n";
 } else {
	print "Error: couldn't write to file $filename: $!\n";
 }
}

sub restore_parameters {
 local($query) = @_;
 local($filename) = &clean_name($query->param('savefile'));
 if (open(FILE,$filename)) {
	$query = new CGI(FILE); # Throw out the old query, replace it with a new one
	close FILE;
	print "State has been restored from file $filename\n";
 } else {
	print "Error: couldn't restore file $filename: $!\n";
 }
 return $query;
}

# Very important subroutine -- get rid of all the naughty
# metacharacters from the file name. If there are, we
# complain bitterly and die.
sub clean_name {
 local($name) = @_;
 unless ($name=~/^[\w\._\-]+$/) {
 print "$name has naughty characters. Only ";
 print "alphanumerics are allowed. You can't use absolute names.";
 die "Attempt to use naughty characters";
 }
 return "WORLD_WRITABLE/$name";
}

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