$ cat post-list.csv | split -l 30 - --filter='jq -R . | jq --slurp -c .' | xargs -d "\n" -I % sh -c 'curl -H "Content-Type: application/json" -X POST -d '"'"'{"type":1,"entries":%}'"'"' && sleep 30'

March 7, 2018, 12:12 p.m.pratham2003


post-list.csv contains list of URLs in my example.

  • split -l 30 Split by 30 lines

  • - Use stdin as input for split

  • --filter Couldn't find a way to easily pipe to stdout from split, hence --filter

  • jq -R . From the jq manual - Don’t parse the input as JSON. Instead, each line of text is passed to the filter as a string

  • jq --slurp -c . From the jq manual - Instead of running the filter for each JSON object in the input, read the entire input stream into a large array and run the filter just once. -c makes it easier to pipe and use it in the xargs that follows.

  • xargs -d "\n" -I % sh -c Execute a command for each array. Use "\n" as delimiter. Use % as a placeholder in the command that follows.

  • Single quotes inside sh -c ' ... ' are escaped as '"'"' single-double-single-double-single. You can do whatever you need to inside sh -c ' ... && sleep 123'


You need jq installed, for example in Debian / Ubuntu:

apt-get install jq`

See also https://stedolan.github.io/jq/manual/

I suspect the input file (cat post-list.csv) may not contain double or single quotes but haven't tested it.