blob: 9d504f48403a549c481ce2dd2100ff97b52f1fc9 (
plain)
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
|
POST upload example:
post_upload.htm
===============
<html>
<body>
<form action=/cgi-bin/post_upload.cgi method=post enctype=multipart/form-data>
File to upload: <input type=file name=file1> <input type=submit>
</form>
post_upload.cgi
===============
#!/bin/sh
# POST upload format:
# -----------------------------29995809218093749221856446032^M
# Content-Disposition: form-data; name="file1"; filename="..."^M
# Content-Type: application/octet-stream^M
# ^M <--------- headers end with empty line
# file contents
# file contents
# file contents
# ^M <--------- extra empty line
# -----------------------------29995809218093749221856446032--^M
file=/tmp/$$-$RANDOM
CR=`printf '\r'`
# CGI output must start with at least empty line (or headers)
printf '\r\n'
IFS="$CR"
read -r delim_line
IFS=""
while read -r line; do
test x"$line" = x"" && break
test x"$line" = x"$CR" && break
done
cat >"$file"
# We need to delete the tail of "\r\ndelim_line--\r\n"
tail_len=$((${#delim_line} + 6))
# Get and check file size
filesize=`stat -c"%s" "$file"`
test "$filesize" -lt "$tail_len" && exit 1
# Check that tail is correct
dd if="$file" skip=$((filesize - tail_len)) bs=1 count=1000 >"$file.tail" 2>/dev/null
printf "\r\n%s--\r\n" "$delim_line" >"$file.tail.expected"
if ! diff -q "$file.tail" "$file.tail.expected" >/dev/null; then
printf "<html>\n<body>\nMalformed file upload"
exit 1
fi
rm "$file.tail"
rm "$file.tail.expected"
# Truncate the file
dd of="$file" seek=$((filesize - tail_len)) bs=1 count=0 >/dev/null 2>/dev/null
printf "<html>\n<body>\nFile upload has been accepted"
|
