busybox/networking/httpd_post_upload.txt

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"
1	POST upload example:
2
3	post_upload.htm
4	===============
5	<html>
6	<body>
7	<form action=/cgi-bin/post_upload.cgi method=post enctype=multipart/form-data>
8	File to upload: <input type=file name=file1> <input type=submit>
9	</form>
10
11
12	post_upload.cgi
13	===============
14	#!/bin/sh
15
16	# POST upload format:
17	# -----------------------------29995809218093749221856446032^M
18	# Content-Disposition: form-data; name="file1"; filename="..."^M
19	# Content-Type: application/octet-stream^M
20	# ^M <--------- headers end with empty line
21	# file contents
22	# file contents
23	# file contents
24	# ^M <--------- extra empty line
25	# -----------------------------29995809218093749221856446032--^M
26
27	file=/tmp/$$-$RANDOM
28
29	CR=`printf '\r'`
30
31	# CGI output must start with at least empty line (or headers)
32	printf '\r\n'
33
34	IFS="$CR"
35	read -r delim_line
36	IFS=""
37
38	while read -r line; do
39	test x"$line" = x"" && break
40	test x"$line" = x"$CR" && break
41	done
42
43	cat >"$file"
44
45	# We need to delete the tail of "\r\ndelim_line--\r\n"
46	tail_len=$((${#delim_line} + 6))
47
48	# Get and check file size
49	filesize=`stat -c"%s" "$file"`
50	test "$filesize" -lt "$tail_len" && exit 1
51
52	# Check that tail is correct
53	dd if="$file" skip=$((filesize - tail_len)) bs=1 count=1000 >"$file.tail" 2>/dev/null
54	printf "\r\n%s--\r\n" "$delim_line" >"$file.tail.expected"
55	if ! diff -q "$file.tail" "$file.tail.expected" >/dev/null; then
56	printf "<html>\n<body>\nMalformed file upload"
57	exit 1
58	fi
59	rm "$file.tail"
60	rm "$file.tail.expected"
61
62	# Truncate the file
63	dd of="$file" seek=$((filesize - tail_len)) bs=1 count=0 >/dev/null 2>/dev/null
64
65	printf "<html>\n<body>\nFile upload has been accepted"