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>
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
24 # ^M <--------- extra empty line
25 # -----------------------------29995809218093749221856446032--^M
31 # CGI output must start with at least empty line (or headers)
38 while read -r line; do
39 test x"$line" = x"" && break
40 test x"$line" = x"$CR" && break
45 # We need to delete the tail of "\r\ndelim_line--\r\n"
46 tail_len=$((${#delim_line} + 6))
48 # Get and check file size
49 filesize=`stat -c"%s" "$file"`
50 test "$filesize" -lt "$tail_len" && exit 1
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" "$file.tail.expected" >/dev/null; then
56 printf "<html>\n<body>\nMalformed file upload"
60 rm "$file.tail.expected"
63 dd of="$file" seek=$((filesize - tail_len)) bs=1 count=0 >/dev/null 2>/dev/null
65 printf "<html>\n<body>\nFile upload has been accepted"