3 # Copyright 2016 - 2023 Paul Hänsch
5 # Permission to use, copy, modify, and/or distribute this software for any
6 # purpose with or without fee is hereby granted, provided that the above
7 # copyright notice and this permission notice appear in all copies.
9 # THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
12 # SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
15 # IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 [ -n "$include_fileserve" ] && return 0
18 include_fileserve="$0"
22 css) printf 'text/css';;
23 gif) printf 'image/gif';;
24 html|html) printf 'text/html';;
25 jpg|jpeg) printf 'image/jpeg';;
26 js) printf 'text/javascript';;
27 m3u8) printf 'application/x-mpegURL';;
28 m4a) printf 'audio/mp4';;
29 m4s) printf 'video/iso.segment';;
30 m4v|mp4) printf 'video/mp4';;
31 mpd) printf 'application/dash+xml';;
32 ogg) printf 'audio/ogg';;
33 pdf) printf 'application/pdf';;
34 png) printf 'image/png';;
35 sh) printf 'text/x-shellscript';;
36 svg) printf 'image/svg+xml';;
37 tex) printf 'text/x-tex';;
38 txt) printf 'text/plain';;
39 short) printf 'text/prs.shorthand';;
40 ts) printf 'video/MP2T';;
41 webm) printf 'video/webm';;
42 xml) printf 'application/xml';;
43 *) printf 'application/octet-stream';;
48 local file="$1" mime="$2"
49 local file_size file_date http_date cachedate range
51 if ! [ -f "$file" ]; then
52 printf 'Content-Length: 0\r\nStatus: 404 Not Found\r\n\r\n'
54 elif ! [ -r "$file" ]; then
55 printf 'Content-Length: 0\r\nStatus: 403 Forbidden\r\n\r\n'
59 read file_size file_date <<-EOF
60 $(stat -Lc "%s %Y" "$file")
62 http_date="$(date -ud "@$file_date" +"%a, %d %b %Y %T GMT")"
64 [ ! "$HTTP_IF_MODIFIED_SINCE" -a "$cgilite_headers" ] \
65 && HTTP_IF_MODIFIED_SINCE="$(HEADER If-Modified-Since)"
66 [ ! "$HTTP_RANGE" -a "$cgilite_headers" ] \
67 && HTTP_RANGE="$(HEADER Range)"
70 # Parse the allowable date formats from Section 3.3.1 of
71 # https://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html
72 # HEADER If-Modified-Since \
73 printf %s "$HTTP_IF_MODIFIED_SINCE" \
74 | sed -E 's;^[^ ]+, ([0-9]{2}) (...) ([0-9]{4}) (..:..:..) GMT$;\3-\2-\1 \4;;
75 s;^[^ ]+, ([0-9]{2})-(...)-([789][0-9]) (..:..:..) GMT$;19\3-\2-\1 \4;;
76 s;^[^ ]+, ([0-9]{2})-(...)-([0-6][0-9]) (..:..:..) GMT$;20\3-\2-\1 \4;;
77 s;^[^ ]+ (...) ([0-9]{2}) (..:..:..) ([0-9]{4})$;\4-\1-\2 \3;;
78 s;^[^ ]+ (...) ([0-9]) (..:..:..) ([0-9]{4})$;\4-\1-\2 \3;;
79 s;Jan;01;; s;Feb;02;; s;Mar;03;; s;Apr;04;; s;May;05;; s;Jun;06;;
80 s;Jul;07;; s;Aug;08;; s;Sep;09;; s;Oct;10;; s;Nov;11;; s;Dec;12;;' \
81 | xargs -r0 date +%s -ud 2>&-
84 range="${HTTP_RANGE#bytes=}"
86 *[^0-9]*-*|*-*[^0-9]*)
90 range="${range}$((file_size - 1))"
93 [ ${range#-} -le $file_size ] \
94 && range="$((file_size - ${range#-}))-$((file_size - 1))" \
95 || range="0-$((file_size - 1))"
98 [ ${range#*-} -ge $file_size ] \
99 && range="${range%-*}-$((file_size - 1))"
105 if [ "$file_date" -lt "$cachedate" ] 2>&-; then
106 printf '%s: %s\r\n' \
107 Status '304 Not Modified' \
109 Last-Modified "$http_date"
112 elif [ -z "$range" ]; then
113 printf '%s: %s\r\n' \
115 Accept-Ranges bytes \
116 Last-Modified "$http_date" \
117 Content-Type "${mime:-$(file_type "$file")}" \
118 Content-Length $file_size
121 [ "$REQUEST_METHOD" != HEAD ] && cat "$file"
123 elif [ "${range%-*}" -le "${range#*-}" ]; then
124 printf '%s: %s\r\n' \
125 Status "206 Partial Content" \
126 Accept-Ranges bytes \
127 Last-Modified "$http_date" \
128 Content-Type "${mime:-$(file_type "$file")}" \
129 Content-Range "bytes ${range}/${file_size}" \
130 Content-Length "$((${range#*-} - ${range%-*} + 1))"
133 [ "$REQUEST_METHOD" != HEAD ] \
134 && tail -c+$((${range%-*} + 1)) "$file" \
135 | head -c "$((${range#*-} - ${range%-*} + 1))"
137 elif [ "${range%-*}" -gt "${range#*-}" ]; then
138 printf '%s: %s\r\n' \
139 Status "216 Range Not Satisfiable" \
141 Content-Range \*/${file_size}