| 19 |
|
|
| 20 |
|
|
| 21 |
|
my ($query) = new CGI; |
| 22 |
– |
my ($doci) = ($query->param('doc') =~ /^\s*(.*?\.txt)\s*$/); |
| 23 |
– |
my ($doc) = "../documentation/$doci"; |
| 22 |
|
|
| 23 |
< |
print "content-type: text/html\n\n"; |
| 23 |
> |
# Note filenames may only have one dot in them, in the ".txt". |
| 24 |
> |
# This prevents malicious users using "../" to view files. |
| 25 |
> |
my ($doc) = ($query->param('doc') =~ /^\s*([^\.]*?\.txt)\s*$/); |
| 26 |
|
|
| 27 |
+ |
print "Content-type: text/html\n\n"; |
| 28 |
+ |
|
| 29 |
+ |
unless (defined $doc) { |
| 30 |
+ |
print "The link to this page was broken - it must specify a .txt file."; |
| 31 |
+ |
exit; |
| 32 |
+ |
} |
| 33 |
+ |
|
| 34 |
+ |
# Prevent hackers from supplying a malformed document string. |
| 35 |
+ |
# I.e. only allow normal characters, slashes and dots. |
| 36 |
+ |
unless ($doc =~ /^[a-zA-Z_\-0-9\.\/]+$/) { |
| 37 |
+ |
print "Go Away, you nasty hax0r!"; |
| 38 |
+ |
exit; |
| 39 |
+ |
} |
| 40 |
+ |
$doc = "../documentation/".$doc; |
| 41 |
+ |
|
| 42 |
|
print <<"END"; |
| 43 |
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> |
| 44 |
|
|
| 46 |
|
docs.cgi |
| 47 |
|
Web-based text file viewer and formatter. |
| 48 |
|
Created by pjm2 19/10/2000 |
| 49 |
< |
Last modified 19/10/2000 |
| 49 |
> |
Last modified 02/11/2000 |
| 50 |
|
--> |
| 51 |
|
|
| 52 |
|
<html> |
| 65 |
|
<td valign="top"> |
| 66 |
|
END |
| 67 |
|
|
| 68 |
< |
&print_file($left); |
| 68 |
> |
&print_html($left); |
| 69 |
|
|
| 70 |
|
print <<"END"; |
| 71 |
|
|
| 73 |
|
<td valign="top"> |
| 74 |
|
END |
| 75 |
|
|
| 76 |
< |
&print_file($title); |
| 62 |
< |
|
| 63 |
< |
print "<PRE>\n"; |
| 76 |
> |
&print_html($title); |
| 77 |
|
&print_file($doc); |
| 78 |
< |
print "</PRE>\n"; |
| 78 |
> |
&print_html($bottom); |
| 79 |
|
|
| 67 |
– |
&print_file($bottom); |
| 68 |
– |
|
| 80 |
|
print <<"END"; |
| 81 |
|
|
| 82 |
|
</td> |
| 90 |
|
|
| 91 |
|
exit 0; |
| 92 |
|
|
| 93 |
+ |
# Print a file, whilst escaping HTML: - |
| 94 |
|
sub print_file ($) { |
| 95 |
+ |
my ($urls) = '(' . join ('|', qw{ |
| 96 |
+ |
http |
| 97 |
+ |
telnet |
| 98 |
+ |
gopher |
| 99 |
+ |
file |
| 100 |
+ |
wais |
| 101 |
+ |
ftp |
| 102 |
+ |
} ) |
| 103 |
+ |
. ')'; |
| 104 |
+ |
|
| 105 |
+ |
my ($ltrs) = '\w'; |
| 106 |
+ |
my ($gunk) = '/#~:.?+=&%@!\-'; |
| 107 |
+ |
my ($punc) = '.:?\-'; |
| 108 |
+ |
my ($any) = "${ltrs}${gunk}${punc}"; |
| 109 |
|
my ($filename) = @_; |
| 84 |
– |
print `cat $filename`; |
| 85 |
– |
} |
| 86 |
– |
|
| 87 |
– |
sub print_file_old ($) { |
| 88 |
– |
my ($filename) = @_; |
| 110 |
|
open(FILE, $filename) or die "Cannot open $filename: $!\n"; |
| 111 |
< |
while (my ($line) = <FILE>) { |
| 112 |
< |
print $line; |
| 111 |
> |
print "<pre>\n"; |
| 112 |
> |
# Use $_ implicitly throughout. |
| 113 |
> |
while (<FILE>) { |
| 114 |
> |
# Must do the next line first! |
| 115 |
> |
s/&/&/g; |
| 116 |
> |
s/</</g; |
| 117 |
> |
s/>/>/g; |
| 118 |
> |
s/"/"/g; |
| 119 |
> |
s/\b($urls:[$any]+?)(?=[$punc]*[^$any]|$)/<a href="$1">$1<\/a>/igox; |
| 120 |
> |
print; |
| 121 |
|
} |
| 122 |
+ |
print "</pre>"; |
| 123 |
|
} |
| 124 |
|
|
| 125 |
+ |
# Print a file without escaping HTML: - |
| 126 |
+ |
sub print_html ($) { |
| 127 |
+ |
my ($filename) = @_; |
| 128 |
+ |
print `cat $filename`; |
| 129 |
+ |
} |
