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I have a JSON list and I am trying to POST a particular key: value from the list to the slack webhook using curl. I am using jq to get the value for a specific key

This works fine:

echo {{job.message}} | jq -r '.[0] | .status'

This does not work:

curl -vvv -X POST -H "Content-type: application/json" --data \"{\"text\":\"{{job.message}} | jq -r ''.[0] | .status''\"}\" https://hooks.slack.com/services/xxxxx

job.message is a variable with json list

When I output the result using echo in shell, it works fine but when I use curl it show invalid payload or .key not found even though the key is present.

Bertrand Martel
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ds-user
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1 Answers1

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In your text value, there is no mention of the command echo ..., you may use a subshell to evaluate the result. Also, you can use single quote for --data instead of double quote to avoid escaping:

curl -vvv -X POST \
    -H "Content-type: application/json" \
    --data '{"text":"'"$(echo $job_message | jq -r '.[0].status')"'"}' \
    "https://hooks.slack.com/services/xxxxx"

Also you can use jq -n to build the JSON object:

curl -vvv -H "Content-type: application/json" \
    -d "$(jq -n --arg text $job_message '{"text": ($text | fromjson)[0].status}')" \
    "https://hooks.slack.com/services/xxxxx"

You can also pipe jq command output to the body like this and use jq only to build the json object:

jq -n --arg text $job_message '{"text": ($text | fromjson)[0].status}' | \
   curl -vvv -H "Content-Type: application/json" -d @- "https://hooks.slack.com/services/xxxxx"
Bertrand Martel
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