any option to use expressions also in headers array of a stream. So a JSON payload would have some values, which can be grabbed (e.g. via expressions) and put inside of header data? See below a try to utilize expression for uuid. { "protocol_id": 7, "enabled": true, "validate_message": "", "name": "OTA_functionCallResult", "configuration": { "headers": [ { "name": "Authorization", "value": "xyz" }, { "name": "X-Metadata", "value": "taskName=OFC_Result", "value": "uuid=%2+3%" } ], "ident": "%ident%", "limit_messages": 100, "uri": "https://xyz" }, "queue_ttl": 86400, "metadata": {} } if("undefined"!==typeof hljs)hljs._ha();else if("undefined"===typeof hljsLoading){hljsLoading=1;var a=document.getElementsByTagName("head")[0],e=document.createElement("link");e.type="text/css";e.rel="stylesheet";e.href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.7.0/styles/default.min.css";a.appendChild(e);e=document.createElement("script");e.type="text/javascript";e.onload=function(){var d={},f=0;hljs._hb=function(b){b.removeAttribute("data-hljs");var c=b.innerHTML;c in d?b.innerHTML=d[c]:(7

Let me explain the desired behaviour. May be expression is not the right solution here. Am MQTT topic arrives, containing JSON as payload At every reception a REST call shall be generated. In header array I can put fixed elements as of now., e.g. Authorization and additional meta data. This is how it already works now. I wanted to use expressions to have a dynamic element in the header. This dynamic element shall be a copy of a defined element out of received JSON payload

flespi expression in header array

jp_one

any option to use expressions also in headers array of a stream. So a JSON payload would have some values, which can be grabbed (e.g. via expressions) and put inside of header data? See below a try to utilize expression for uuid.

{
  "protocol_id": 7,
  "enabled": true,
  "validate_message": "",
  "name": "OTA_functionCallResult",
  "configuration": {
    "headers": [
      {
        "name": "Authorization",
        "value": "xyz"
      },
      {
        "name": "X-Metadata",
        "value": "taskName=OFC_Result",
         "value": "uuid=%2+3%"    
      }
    ],
    "ident": "%ident%",
    "limit_messages": 100,
    "uri": "https://xyz"
  },
  "queue_ttl": 86400,
  "metadata": {}
}

dexif

The main problem here is that when sending messages by stream, they are sent in batches, not one by one.

jp_one

how is this related to integration of expressions into header array? In my case only one specific topic would trigger a POST request

dexif

Expressions usually calculate something based on messages. A stream sends many messages in one request. It is not clear what the expression should calculate.

jp_one

Let me explain the desired behaviour. May be expression is not the right solution here.

Am MQTT topic arrives, containing JSON as payload
At every reception a REST call shall be generated. In header array I can put fixed elements as of now., e.g. Authorization and additional meta data. This is how it already works now.
I wanted to use expressions to have a dynamic element in the header. This dynamic element shall be a copy of a defined element out of received JSON payload

shal

jp_one Such functionality is not built-in flespi. Please use your own MQTT message handler to achieve it.

jp_one

Got it. Thanks for clarification guys.