1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
#!/bin/sh
# HtContent
#
# Determine a file's MIME type from its contents.
#
#
# Part of the ht://Dig package <http://www.htdig.org/>
# Copyright (c) 2003 The ht://Dig Group
# For copyright details, see the file COPYING in your distribution
# or the GNU Public License version 2 or later
# <http://www.gnu.org/copyleft/gpl.html>
# $Id: HtFileType,v 1.5 2004/06/11 15:55:16 grdetil Exp $
if file -v > /dev/null; then
have_modern_file=true
else
have_modern_file=false
fi
tmpfile=`mktemp /tmp/HtFileType.XXXXXX` || exit 1
magic_file=@CONFIG_DIR@/HtFileType-magic.mime
#magic_file=${0}-magic.mime
# Go through each specified file.
# Can't say 'for input in "$*"; do' as that breaks up names containing spaces
while [ $# -gt 0 ]; do
input="$1"; shift;
#echo -n $input ' '
# Classify based on start of file. Strip leading whitespace and
# convert broken "<!" style comments to "<!--".
# (If available, use a fixed magic file, which is faster...)
# From the output, strip path name and comments like ', with very long lines'
if $have_modern_file; then
output=`file -i -b -m $magic_file "$input" 2>/dev/null | sed 's/[,;].*//'`
else
# old file(1) command can't strip leading whitespace, or accept -i option
head -100 "$input" 2> /dev/null | tr '\012\015' ' ' |
sed -e's/^ *//' -e's/ *<! /<!--/' > $tmpfile
output=`file -m $magic_file $tmpfile 2>/dev/null | sed -e 's/.*:[ ]*//' -e's/[,;].*//'`
/bin/rm -f $tmpfile
fi
case $output in
# 'file' calls most human-readable files "text", so check what type
*text) case $output in
*HTML* ) type=text/html;;
*SGML* ) type=text/sgml;;
*XML* ) type=text/xml;;
# ignore most source code
*script* | *program* | *command* ) type=application/x-unknown;;
*pre-processor*|*"'diff' output"*) type=application/x-unknown;;
# assume all other text is plain
# (Includes outputs "English t.", "ASCII t.", "international t.")
*) type=text/plain;;
esac;;
# Our magic file already outputs MIME types, so don't change them
*/* ) type=$output;;
# Other recognised types
*postscript* | *PostScript* ) type=application/postscript;;
*PDF* | *acrobat* ) type=application/pdf;;
# otherwise give up
*) type=application/x-unknown;;
esac
# Catch HTML documents, which are special cases of SGML and XML
case $type in
text/xml | text/sgml )
if head -100 "$input"| egrep -i '<html|<head|<title|< *a *href *='>/dev/null
then
echo text/html
else
echo $type
fi;;
* ) echo $type
esac
done
|
