Início / unix / Perguntas / 527013
Accepted
pkaramol
Asked: 2019-06-27 04:32:54 +0800 CST

Passar variável dentro do payload json no script de shell

  • 772

No cenário a seguir, qual é a maneira de passar ${MY_ENV_VAR}a carga útil?

Vou ter que escapar:

a) as aspas simples da carga útil

b) as aspas duplas do valor do textcampo json

Eu preciso ${MY_ENV_VAR)ser interpolado, é claro.

#!/bin/bash

COMMAND=${MY_ENV_VAR}    

curl -X POST --data-urlencode 'payload={"channel": "#alerts", "username": "k8s-cronjobs-bot", "text": "Command ${MY_ENV_VAR} run with success", "icon_emoji": ":ghost:"}' ${SLACK_WEBHOOK}
bash shell

2 respostas

  1. Best Answer

    Com jq:

    $ payload='{"channel": "#alerts", "username": "k8s-cronjobs-bot", "text": "", "icon_emoji": ":ghost:"}'
$ MY_ENV_VAR='"foo"'
$ echo "$payload" | jq --arg cmd "$MY_ENV_VAR" '.text = "Command " + $cmd + " run with success"'
{
  "channel": "#alerts",
  "username": "k8s-cronjobs-bot",
  "text": "Command \"foo\" run with success",
  "icon_emoji": ":ghost:"
}

    Então seu script ficaria assim:

    #!/bin/bash

COMMAND=${MY_ENV_VAR}    
payload='{"channel": "#alerts", "username": "k8s-cronjobs-bot", "text": "", "icon_emoji": ":ghost:"}'
payload=$(echo "$payload" | jq -r --arg cmd "$COMMAND" '.text = "Command " + $cmd + " run with success"')
curl -X POST --data-urlencode "payload=$payload"  "${SLACK_WEBHOOK}"
    • 3

  2. Ou use printfpara ajudar com a mistura de aspas:

    printf -v payload '{"channel": "#alerts", "username": "k8s-cronjobs-bot", "text": "Command %s run with success", "icon_emoji": ":ghost:"}' "$MY_ENV_VAR"
curl -X POST --data-urlencode "payload=$payload" "$SLACK_WEBHOOK"
    • 2

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