Question

I have a monitor API (for example: www.example.com/monitor ) well return system status in JSON format, for example:

{
   "foo" : 1000,
   "bar" : 100
}

I want to use curl to get system status from this API and pipe to Slack

The following is my current script.

status=$(curl "http://www.xample.com/monitor/status" )
slackWebHook="https://hooks.slack.com/services/xxxxx/xxxxx/xxxxx"

function sentSlack () {
 json_template='{
    channel:    $channel,
    username:   $username,
    text:       $text,
    icon_emoji: $icon_emoji,
    attachments: [$attachments]
  }'

  jq -n --arg channel  "#unicorn_log" \
       --arg username "Kuasa Search Report" \
       --arg text     "${msg}"\
       --arg icon_emoji "chart_with_upwards_trend" \
       --arg attachments "${status}" "$json_template" |
       curl -i -X POST --data-urlencode "$(</dev/stdin)"  ${slackWebHook}

}

sentSlack

I always get invalid_payload , because the status be escaped.

{
   \"foo\" : 1000,
   \"bar\" : 100
}

How can I pass JSON to Slack payload correctly?

Answer 1

--arg key value treats value as a string. Since a string containing literal "s needs to have escapes added to be valid in JSON, that's what jq does.

--argjson key value, by contrast, parses value as JSON text; which appears to be what you want to do here.

Change --arg attachments "$status" to --argjson attachments "$status".

How to use shell script pipe json to curl to sent slack message

1 个答案: