/usr/sbin/dwww-convert is in dwww 1.13.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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# vim:ft=perl:cindent:ts=4:sts=4:sw=4:et:fdm=marker:cms=\ #\ %s
#
# dwww-convert -- convert docs to HTML if necessary
#
# Some types of files (e.g. UNIX man pages) are typically not handled by most
# webbrowser setups; we convert these to HTML. Other types (e.g. PDF files
# or PNG images) are best handled by or via the user's webbrowser.
#
# Simple usage: $0 <type> <location>
# <type> is document type: text, man, html, ps, and so on
# <location> is full pathname to original document
#
# Part of the Debian dwww package. Written by Lars Wirzenius.
# Modified by Robert Luberda.
# "@(#)dwww:$Id: dwww-convert 520 2009-01-15 20:44:47Z robert $"
use strict;
use Debian::Dwww::Utils;
use Debian::Dwww::Initialize;
use MIME::Types;
use Cwd qw(realpath);
#$|=1;
#
# Setup defaults.
#
################################################################
#
# Initialization
#
my $dwwwvars = &DwwwInitialize("/etc/dwww/dwww.conf");
my $templates_dir = "/usr/share/dwww/templates";
my $template_start = "$templates_dir/dwww-convert.start";
my $template_end = "$templates_dir/dwww-convert.end";
my $template_dir_start = "$templates_dir/dwww-convert.dir.start";
my $template_dir_end = "$templates_dir/dwww-convert.dir.end";
my $dwww_use_cache = lc($dwwwvars->{'DWWW_USE_CACHE'}) eq "yes";
my $dwww_usefileurl = lc($dwwwvars->{'DWWW_USEFILEURL'}) eq "yes";
################################################################
#
# Local dwww-convert functions
#
#
# Get Last Modification date
#
#######################################################################
#
# Builtin convertFunctions
#
sub OpenPipe() { # {{{
my $program = shift;
my $mode = shift;
my $FH = undef;
if ($mode eq "r") {
return \*STDIN unless defined $program;
$program = "$program |";
} elsif ($mode eq "w") {
return \*STDOUT unless defined $program;
$program = "| $program";
} else {
die("OpenPipe: Unknown mode: $mode\n");
}
open($FH, $program) or die "Can't open pipe for $program: $!\n";
return $FH;
} # }}}
sub ClosePipe() { # {{{
my $FH = shift;
# &fflush($FH) or die("Can't flush: $!");
return if ($FH == \*STDIN || $FH == \*STDOUT);
close($FH) or die("Cannot close filehandle: $!\n");
} # }}}
sub DecompressFile() { # {{{
my $filename = shift;
my $OUT_FH = shift;
my $add_filtr_prog = shift;
my $decompressor = undef;
my $IN_FH = shift;
if ($filename =~ /\.gz$/) {
$decompressor = "zcat \"$filename\"";
} elsif ($filename =~ /\.bz2$/) {
$decompressor = "bzcat \"$filename\"";
}
if (defined $add_filtr_prog) {
if (defined $decompressor) {
$decompressor .= " | $add_filtr_prog";
} else {
$decompressor = "$add_filtr_prog < \"$filename\"";
}
}
if (defined $decompressor) {
if (defined $OUT_FH) {
$IN_FH = &OpenPipe($decompressor, "r")
} else {
system($decompressor);
return;
}
} else {
open($IN_FH, $filename) or die("Can't open file $filename: $!\n");
$OUT_FH = \*STDOUT unless defined $OUT_FH;
}
my $s=$/;
$/=4096;
while (<$IN_FH>) {
print $OUT_FH $_;
}
$/=$s;
&ClosePipe($IN_FH);
} # }}}
#
# Create a directory listing in HTML.
#
sub IsTopLevelDir() { # {{{
my $dir = shift;
my $dwww_docpath = $dwwwvars->{'DWWW_DOCPATH'};
# file does exist, check if it match any files in @dwww_docpath
foreach my $path (@$dwww_docpath) {
if ( -d $path ) {
$path = &realpath( $path );
return 1 if ($dir eq $path);
}
}
return 0;
} # }}}
sub BuiltinDir2Html() { # {{{
my $dir = shift;
my $cacheProg = shift;
my $charset = shift;
my $f = undef;
my @filelist = ();
my @dirlist = ();
my $OUT_FH = &OpenPipe($cacheProg, "w");
my $html_dir = &HTMLEncode($dir);
my $url_dir = &URLEncode($dir);
print $OUT_FH &TemplateFile($template_dir_start,
{ 'TITLE' => "Files in $html_dir",
'MENUADD' => &IsTopLevelDir($dir) ? "" : " | <a href=\"../?type=dir\">Up one level</a> ",
'FILEURL' => $url_dir });
opendir (DIR, $dir) or die "Can't open directory $dir:$!\n";
while ($f = readdir(DIR)) {
next if $f eq ".";
next if $f eq "..";
if ( -d $dir . "/" . $f ) {
push(@dirlist, $f);
} elsif ( -f _ ) {
push(@filelist, $f);
}
}
closedir(DIR);
if ($#filelist > -1 ) {
@filelist = sort(@filelist);
my $table = &BeginTable($OUT_FH, "", 3);
foreach $f (@filelist) {
if ($dwww_usefileurl && ($f =~ /\.htm.*$/)) {
&AddToTable($OUT_FH, $table,
"<a href=\"file://localhost/" . $url_dir . '/' . &URLEncode($f) . "\">" . &HTMLEncode($f) . "</a>");
} else {
&AddToTable($OUT_FH, $table,
"<a href=\"" . &URLEncode($f) . "\">" . &HTMLEncode($f) . "</a>");
}
}
&EndTable($OUT_FH, $table);
}
if ($#dirlist > -1 ) {
@dirlist = sort(@dirlist);
my $table = &BeginTable($OUT_FH, "<FONT SIZE=\"+2\">Subdirectories:</FONT>", 3);
foreach $f (@dirlist) {
if ($dwww_usefileurl && defined (my $g = &GuessFileName("$dir/$f/index", 1 ))) {
&AddToTable($OUT_FH, $table,
"<a href=\"file://localhost" . &URLEncode($g) .
"\">" . &HTMLEncode($f) . "</a>");
} else {
&AddToTable($OUT_FH, $table,
"<a href=\"" .&URLEncode($f)
. "/?type=dir\">" . &HTMLEncode($f) . "</a>");
}
}
&EndTable($OUT_FH, $table);
}
print $OUT_FH &TemplateFile($template_dir_end, { } );
&ClosePipe($OUT_FH);
} # }}}
#
# Convert a manual page source code file to HTML.
#
sub BuiltinMan2Html() { # {{{
my $filename = shift;
my $cacheProg = shift;
my $charset = shift;
my $title = undef;
die "Internal error: invalid charset\n" unless $charset eq "UTF-8";
my $OUT_FH = &OpenPipe($cacheProg, "w");
($title = $filename) =~ s/^.*\/(.+)\.(\d[^\.\\]*)(\.gz|\.bz2)?$/$1($2)/;
print $OUT_FH &TemplateFile($template_start,
{ 'TITLE' => "$title - Man pages",
'MENUADD' => " | <a href=\"/dwww/man/\">Manual pages</a> ",
'FILEURL' => &URLEncode($filename)
});
my $dir = $filename;
$dir =~ s/\/[^\/]*$//;
chdir ("$dir/..") or die "Can't chdir!\n";
$ENV{'MAN_KEEP_FORMATTING'} = 1;
my $IN_FH = &OpenPipe("man -EUTF-8 -P/bin/cat -l \"$filename\" 2>/dev/null | dwww-txt2html --man --utf8", "r");
chdir ("/");
while (<$IN_FH>) {
print $OUT_FH $_;
}
print $OUT_FH &TemplateFile($template_end, { });
&ClosePipe($IN_FH);
&ClosePipe($OUT_FH);
} # }}}
#
# Convert plain text to HTML. This is really trivial, and buggy.
# Input from stdin.
#
sub BuiltinText2Html() { # {{{
my $filename = shift;
my $cacheProg = shift;
my $charset = shift;
my $OUT_FH = &OpenPipe($cacheProg, "w");
print $OUT_FH &TemplateFile($template_start,
{ 'TITLE' => &HTMLEncode($filename),
'MENUADD' => " | <a href=\"./?type=dir\"> Show directory contents </a> ",
'FILEURL' => &URLEncode($filename)
});
if ($charset && $charset eq "UTF-8") {
&DecompressFile($filename, $OUT_FH, "dwww-txt2html --utf8");
} else {
&DecompressFile($filename, $OUT_FH, "dwww-txt2html");
}
print $OUT_FH &TemplateFile($template_end, { }) or die "Can't print\n";
&ClosePipe($OUT_FH);
} # }}}
#
# Convert info file to HTML using info2www
#
sub BuiltinInfo2Html() { # {{{
my $filename = shift;
my $cacheProg = shift;
my $charset = shift;
my $cachePipe = defined $cacheProg ? " | $cacheProg" : "";
system("/usr/lib/cgi-bin/info2www \"$filename\"" . $cachePipe);
} # }}}
sub GuessFileName() { # {{{
my $basefile = shift;
my $is_html = shift;
foreach my $lang ( ("", ".en") ) {
foreach my $comp ( ("", ".gz", ".bz2") ) {
if ($is_html) {
foreach my $suff (".html", ".htm" ) {
my $f = "${basefile}${suff}${lang}${comp}";
return $f if (-f $f and -r $f);
}
} else {
my $f = "${basefile}${lang}${comp}";
return $f if (-f $f and -r $f);
}
}
}
return undef;
} # }}}
sub PrintHeaders() { # {{{
my $filename = shift;
my $base_name = shift;
my $mime_type = shift;
my $mime_charset= shift;
print "Content-type: $mime_type" . (defined $mime_charset ? "; charset=$mime_charset\n" : "\n");
my @stat = stat( $filename );
my $mtime = $stat[9];
print "Last modified: " . gmtime($mtime) . "\n";
print "Content-Disposition: inline; filename=\"$base_name\"\n";
print "\n";
} # }}}
################################################################
#
# Main program
#
my $uses_path_info = 1;
while ($ARGV[0] =~ m/^--(.*)$/) {
shift @ARGV;
if ($1 eq "no-path-info") { $uses_path_info = 0 }
elsif (not $1) { last; }
else {
print STDERR "Error: unknown option `$ARGV[0]'\n";
print STDERR "Usage: $0 [--no-path-info] <type> <location>\n";
exit(1);
}
}
if ( $#ARGV < 1 || $ARGV[0] eq "" || $ARGV[1] eq "" ) {
print STDERR "Error: invalid arguments\n";
print STDERR "Usage: $0 [--no-path-info] <type> <location>\n";
exit 1;
}
my $type = $ARGV[0];
my $file = $ARGV[1];
my $orig_file=$file;
# remove anchor
$file =~ s/#.*$//;
if ( ! -e $file ) {
if ( $type eq "runman" ) {
if ( $file =~ /^(.+)\/([^\/]+)$/ ) {
my $name = $1;
my $sect = $2;
my @files = &GetCommandOutput("man", "--location", "-e", $sect, $name);
$file = $files[0] unless $#files < 0;
$file =~ s/\s.*$//;
if ( $file eq "" or ! -e $file ) {
&ErrorMsg ( "404 Man page not found" ,
"Man page not found" ,
"dwww could not find the man page $name($sect)" );
}
}
} elsif ( $type eq "html" || $type eq "text/html" ) {
# A link may have referred to a .html file
# when only a .html.gz file exists. So check
# to see if alternate file exists, and use
# that one if it does
my $tmp=$file;
$tmp =~ s/(.*)\.htm.*$//; # remove suffix
if (defined ( $tmp = &GuessFileName($tmp, 1) ) ) {
$file = $tmp;
}
} elsif ( defined ( my $tmp = &GuessFileName($file) ) ) {
$file = $tmp;
}
}
# Check if we can show file
$file = &CheckAccess( $dwwwvars, $file, $orig_file );
die "Internal error" if $file eq ""; # CheckAccess should have written the error message and exited.
# Check if we should send redirect
if ( -d $file && $orig_file !~ /\/$/) {
$orig_file .= "/";
$uses_path_info = $FALSE;
}
if (!$uses_path_info && $type ne "runman") {
&RedirectToURL("/cgi-bin/dwww" . &URLEncode($orig_file) . "?type=" . &URLEncode($type));
exit(0);
}
if ( -d $file ) {
if ( $type ne "dir" ) {
$type = "dir";
if (defined (my $f = &GuessFileName( "$file/index", 1 ) ) ){
if ($f ne $file) {
$type = "html";
$file = $f;
}
}
}
} elsif ( $type eq "dir" ) {
$type = "file";
}
if ( $type eq "info" && ! -x "/usr/lib/cgi-bin/info2www" ) {
&ErrorMsg ("500 dwww error",
"Cannot convert info files",
"dwww could not find the <strong>info2www</strong> program, which is required to conver the info files" );
# NOT REACHED
}
(my $base_name = $file) =~ s/^.*\///g;
# identify the compression algorithm used for non-directories
# then, calculate the name of the uncompressed file (in extension)
if ( ! -d $file ) {
$base_name =~ s/\.(gz|bz2|en)$//;
# identify the file type from the file extension
# or using the "file" command.
if ( $type eq "file" ) {
# first find the file extension
my $extension = ($base_name =~ /\.([^\/\.]+)$/) ? $1 : "";
# then guess the file type depending on the extension
# if the extension is of size 0 or more than 4
# text is assumed.
if ($extension eq "" || $extension eq "txt" || $extension eq "text") {
$type = "text/plain";
} elsif ($extension eq "htm" || $extension eq "html" || $extension eq "shtml") {
$type = "text/html";
} elsif ($extension eq "css") {
$type = "text/css";
} elsif ($extension =~ /^[1-9][a-z]*/ && $file =~ /\/man\//) {
# if file is located in */man/* directory, assume it's a man page
$type = "man";
} elsif ($extension =~ /^info.*/ && $file =~ /\/info\//) {
$type = "info";
} elsif (length($extension) > 4) {
$type = "text/plain";
} else {
# use MIME:Types to guess extension
my $mimetypes = MIME::Types->new();
if (defined (my $t = $mimetypes->mimeTypeOf($extension))) {
$type = $t;
} else {
$type = "text/plain"; # default
}
}
}
}
my $convertFunction = undef;
my $mime_type = "text/html";
my $mime_charset=undef;
# Ok, now we can convert the file
if ($type eq "man" || $type eq "runman") {
$convertFunction = \&BuiltinMan2Html;
$mime_charset = "UTF-8";
} elsif ($type eq "dir") {
$convertFunction = \&BuiltinDir2Html;
} elsif ($type eq "info") {
$convertFunction = \&BuiltinInfo2Html;
} elsif ($type eq "text/plain") {
$convertFunction = \&BuiltinText2Html;
} elsif ($type ne "html") {
$mime_type = $type;
}
# Do not set mime type for html docs. Either they have a header or we can
# mostly trust the server and browsers to guess correctly.
if (!$mime_charset and $mime_type =~ /^text\// and $type !~ /^(?:text\/)?html$/) {
$mime_charset="UTF-8";
if ($file =~ /(^\/usr\/share\/doc\/[^\/]+\/)([^\/]+)$/o) {
if (($2 eq "changelog.Debian.gz") || ($2 eq "copyright") ||
($2 eq "changelog.gz" && ! -e "$1/changelog.Debian.gz")) {
$mime_charset="UTF-8";
}
}
}
&PrintHeaders($file, $base_name, $mime_type, $mime_charset);
if ( not defined $convertFunction ) {
&DecompressFile($file);
exit 0;
}
my $cacheProg = undef;
if ($dwww_use_cache) {
# Store the file in the cache unless it is already stored
if (system ("dwww-cache --lookup \"$type\" \"$file\"") == 0) {
exit 0;
} else {
$cacheProg = "dwww-cache --store \"$type\" \"$file\"";
}
}
&$convertFunction( $file, $cacheProg , $mime_charset );
exit 0
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