Simplify the complicated curl command for updating the ddns record.

From: Hongyi Zhao via curl-users <curl-users_at_cool.haxx.se>
Date: Fri, 29 Jan 2021 15:47:39 +0800

Hi,

Currently, I'm using the following command to update the dyndns A
record on the remote provider's DNS server from my intranet machine:

while :; do
  curl -X POST https://dnsapi.cn/Record.Ddns \
       -d "$(
         curl -s -X POST https://dnsapi.cn/Record.List \
              -d
'login_token=id,tocken&format=json&domain=hyddns.xyz&sub_domain=free'
|
                 jq '

"login_token=209395,153bdabe92e6c4212280b7a764967a72&format=json&domain_id="
+ .domain.id
                    + (.records[] | select(.name == "free") |
"&record_id=" + .id + "&record_line_id=" + .line_id +
"&sub_domain=free" )
                    ' |
                 sed -re 's/^"//;s/"$//'
       )" | jq .
  sleep 30
done

As you can see, it's a rather complicated curl invocation. Any
hints/notes/suggestions for simplify such job with curl?

Regards

-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao_at_gmail.com>
Theory and Simulation of Materials
Hebei Polytechnic University of Science and Technology engineering
NO. 552 North Gangtie Road, Xingtai, China
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Received on 2021-01-29