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77 lines
1.7 KiB
Plaintext
77 lines
1.7 KiB
Plaintext
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POST upload example:
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post_upload.htm
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===============
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<html>
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<body>
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<form action=/cgi-bin/post_upload.cgi method=post enctype=multipart/form-data>
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File to upload: <input type=file name=file1> <input type=submit>
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</form>
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post_upload.cgi
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===============
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#!/bin/sh
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# POST upload format:
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# -----------------------------29995809218093749221856446032^M
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# Content-Disposition: form-data; name="file1"; filename="..."^M
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# Content-Type: application/octet-stream^M
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# ^M <--------- headers end with empty line
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# file contents
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# file contents
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# file contents
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# ^M <--------- extra empty line
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# -----------------------------29995809218093749221856446032--^M
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# Beware: bashism $'\r' is used to handle ^M
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file=/tmp/$$-$RANDOM
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# CGI output must start with at least empty line (or headers)
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printf '\r\n'
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IFS=$'\r'
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read -r delim_line
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IFS=''
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delim_line="${delim_line}--"$'\r'
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while read -r line; do
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test "$line" = '' && break
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test "$line" = $'\r' && break
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done
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# This will not work well for binary files: bash 3.2 is upset
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# by reading NUL bytes and loses chunks of data.
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# If you are not bothered by having junk appended to the uploaded file,
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# consider using simple "cat >file" instead of the entire
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# fragment below.
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while read -r line; do
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while test "$line" = $'\r'; do
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read -r line
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test "$line" = "$delim_line" && {
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# Aha! Empty line + delimiter! All done
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cat <<EOF
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<html>
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<body>
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File upload has been accepted
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EOF
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exit 0
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}
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# Empty line + NOT delimiter. Save empty line,
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# and go check next line
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printf "%s\n" $'\r' -vC >&3
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done
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# Not empty line - just save
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printf "%s\n" "$line" -vC >&3
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done 3>"$file"
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cat <<EOF
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<html>
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<body>
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File upload was not terminated with '$delim_line' - ??!
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EOF
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