How to use in curl command data from file?

Question

I have a text file containing variables of fqdn and hostname. File looks like this

first_fqnd    first_hostname
second_fqdn     second_hostname
.....      .....

I have to update some data using curl in a bash script, but I have to take fqdn and hostname from this text file and make a curl for every pair fqdn and hostname.

My curl should be like this:

curl -H "Content-Type:application/json" -XPUT "https://pup.pnet.pl/api/hosts/**fqdn from file**" -d '{"host":{"name": "**hostname from file**"}}' --cacert bundle.pem --cert xxx-pem.cer --key xxx-privkey.pem

How can I pass these variables from file to curl? I've thought about using awk, but I don't know how to use it in curl command

anishsane · Accepted Answer · 2016-07-19 10:59:19Z

5

Use a while construct to read the lines of file and put whitespace separated parameters as two relevant variables, fqdn and hostn:

while read fqdn hostn; do
    curl -H .... -XPUT "https://pup.pnet.pl/api/hosts/${fqdn}" \
      -d '{"host":{"name": "'"${hostn}"'"}}' --cacert ....; done <file.txt

edited Jul 19, 2016 at 10:59

anishsane

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answered Jul 19, 2016 at 8:16

heemayl

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1 Comment

Barmar Over a year ago

You don't need backslash after do

Will · Accepted Answer · 2016-07-19 08:19:18Z

2

Try something like this:

#!/bin/bash

while read fqdn hostname; do
    curl -H "Content-Type:application/json" -XPUT \
        "https://pup.pnet.pl/api/hosts/${fqdn}" \
        -d '{"host":{"name": "'${hostname}'}}' --cacert bundle.pem \
        --cert xxx-pem.cer --key xxx-privkey.pem
done <input_file.txt

The while read fqdn hostname will take input from Standard Input, line by line, splitting it by Bash's Internal Field Separator into "column" variables $fqdn and $hostname. See Catching User Input for more information.

answered Jul 19, 2016 at 8:19

Will

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