Call Elastic search from shell script for indexing pdf document
I guess the issue has to shell not expanding the variables within single-quotes, you need to double-quote to expand it. i.e.
change -d' { "data" : $var }'
to
-d '{"data" : "'"$(base64 file_name.pdf)"'"}' directly to pass the base64 stream.
(or)
-d '{"data" : "'"$var"'"}'More about quoting and variables in ksh here.