| 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 |
