如何 SSH 一个 curl 命令

Question

env = GNU bash, version 4.2.46(2)-release (x86_64-redhat-linux-gnu)

Situation:
SystemA=No internet. SystemB=Yes internet.
SystemA has a log file. SystemA wants SystemB to send a curl command for him.

SystemA$
ssh SystemB curl -X POST -H "Content-type: application/json" -d "$data" $hook = fail

SystemB$
curl -X POST -H "Content-type: application/json" -d "$data" $hook = success

How do I achieve this without SystemA 'scp'ing the log file to SystemB?
It's heavily schedule related so I want SystemA let SystemB work.

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EDIT: I narrowed down the problem:

On SystemB:

curl -X POST -H "Content-type: application/json" -d '{$data}' $hookurl = success
curl -X POST -H "Content-type: application/json" -d {$data} $hookurl = fail

So when I type in SystemA
ssh SystemB curl -X POST -H "Content-type: application/json" -d "{$data}" $hookurl
It actually runs with -d {$data} on SystemB. How can I fix this?

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Update:
ssh SystemB curl -X POST -H "Content-type: application/json" -d "'{$data}'" $hookurl

did work and actually sent data to url, but curl: (6) Could not resolve host: application; Unknown error curl: (6) Could not resolve host: application; Unknown error occurred again.

Answer 1

Use sshfs perhaps

on systemB

sshfs -p'ssh port' -o password_stdin user@systemA:/home/user/dir /home/user/dir <<< 'passwd'

Answer 2

You can use this command:

ssh SystemB /bin/bash <<< "$(declare -p data hook);"'curl -X POST -H "Content-type: application/json" -d "$data" "$hook"'

"$(declare -p data hook);" takes variable definitions from SystemA and passes them to SystemB