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- 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
- # Beware: bashism $'\r' is used to handle ^M
- file=/tmp/$$-$RANDOM
- # CGI output must start with at least empty line (or headers)
- printf '\r\n'
- IFS=$'\r'
- read -r delim_line
- IFS=''
- delim_line="${delim_line}--"$'\r'
- while read -r line; do
- test "$line" = '' && break
- test "$line" = $'\r' && break
- done
- # This will not work well for binary files: bash 3.2 is upset
- # by reading NUL bytes and loses chunks of data.
- # If you are not bothered by having junk appended to the uploaded file,
- # consider using simple "cat >file" instead of the entire
- # fragment below.
- while read -r line; do
- while test "$line" = $'\r'; do
- read -r line
- test "$line" = "$delim_line" && {
- # Aha! Empty line + delimiter! All done
- cat <<EOF
- <html>
- <body>
- File upload has been accepted
- EOF
- exit 0
- }
- # Empty line + NOT delimiter. Save empty line,
- # and go check next line
- printf "%s\n" $'\r' -vC >&3
- done
- # Not empty line - just save
- printf "%s\n" "$line" -vC >&3
- done 3>"$file"
- cat <<EOF
- <html>
- <body>
- File upload was not terminated with '$delim_line' - ??!
- EOF
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