Http request problem

General
1

Hi Node-Red community, I have a problem that I do not find how to solve it.
I am getting some variables from my server joining them into a msg.payload and then trying to send via HTTP request but the server does not respond.
This is my array of variables:
[21,31,9] -> msg.payload
This is my url&method & payload:
Change node, set msg.url = url, set msg.method = post, set msg.headers = {service,content-type = text/plain} and set msg.payload = $string(payload).
The request is as follows:
{"payload":"temp|21#hr|31#lux|9","_msgid":"6f19bf01.e365f","url":"http://----","method":"POST","headers":{"Service":"mine","Content-Type":"text/plain"}}
but no response from server. Any ideas?
EDIT, code from POSTMAN that works:

POST /iot/d?k=KEY& i=sensor; HTTP/1.1
Host: IP:PPPP
Accept: application/json
Service: service
ServicePath: /Sensor
Content-Type: text/plain
User-Agent: PostmanRuntime/7.19.0
Cache-Control: no-cache
Postman-Token: ----
Host: IP:PPPP
Accept-Encoding: gzip, deflate
Content-Length: 19
Connection: keep-alive
cache-control: no-cache

temp|21#hr|31#lux|9

Regards!

2

The first think I would try is to use curl to send the same request from the same server where node-red is running. Something like this:

curl -v -X POST -H 'Service: mine' -H 'Content-Type: text/plain' `http://...`

That should give you enough feedback to know whether it's a network, DNS, router, or server issue. If that works, then you should probably post your flow so we can help debug further.

Incidentally, how do you know that the server is not responding? What are you using to show the output from the service (if any)?

3

Hi!
The server is working, the response I am receiving through HTTP request node.

[
    {
        "id": "e04b0f75.efce08",
        "type": "tab",
        "label": "Flow 1",
        "disabled": false,
        "info": ""
    },
    {
        "id": "4db09aba.6408d4",
        "type": "join",
        "z": "e04b0f75.efce08",
        "name": "",
        "mode": "custom",
        "build": "array",
        "property": "payload",
        "propertyType": "msg",
        "key": "topic",
        "joiner": "|",
        "joinerType": "str",
        "accumulate": false,
        "timeout": "",
        "count": "3",
        "reduceRight": false,
        "reduceExp": "",
        "reduceInit": "",
        "reduceInitType": "",
        "reduceFixup": "",
        "x": 710,
        "y": 280,
        "wires": [
            [
                "4d340796.b64e88",
                "19267ce4.02a55b"
            ]
        ]
    },
     {
        "id": "b622dd82.eb625",
        "type": "http request",
        "z": "e04b0f75.efce08",
        "name": "http req",
        "method": "use",
        "ret": "txt",
        "paytoqs": false,
        "url": "",
        "tls": "",
        "persist": true,
        "proxy": "",
        "authType": "",
        "x": 660,
        "y": 500,
        "wires": [
            [
                "9239ba5a.ee413"
            ]
        ]
    },
    {
        "id": "9239ba5a.ee413",
        "type": "debug",
        "z": "e04b0f75.efce08",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "x": 930,
        "y": 500,
        "wires": []
    },
    {
        "id": "4d340796.b64e88",
        "type": "function",
        "z": "e04b0f75.efce08",
        "name": "",
        "func": "msg.payload= 'temp|'+msg.payload[0]+'#hr|'+msg.payload[1]+'#lux|'+msg.payload[2];,
        "outputs": 1,
        "noerr": 0,
        "x": 850,
        "y": 280,
        "wires": [
            [
                "a54f1ec9.9912d8"
            ]
        ]
    },
    {
        "id": "d994620a.ea092",
        "type": "debug",
        "z": "e04b0f75.efce08",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "x": 510,
        "y": 640,
        "wires": []
    },
    {
        "id": "a54f1ec9.9912d8",
        "type": "change",
        "z": "e04b0f75.efce08",
        "name": "url&method",
        "rules": [
            {
                "t": "set",
                "p": "url",
                "pt": "msg",
                "to": "http://IP:PPPP/iot/d?k=KEY&i=sensor&getCmd=1",
                "tot": "str"
            },
            {
                "t": "set",
                "p": "method",
                "pt": "msg",
                "to": "POST",
                "tot": "str"
            },
            {
                "t": "set",
                "p": "headers",
                "pt": "msg",
                "to": "{\"Service\":\"Service\",\"Content-Type\":\"text/plain\",\"ServicePath\":\"/Sensor\"}",
                "tot": "json"
            },
            {
                "t": "set",
                "p": "payload",
                "pt": "msg",
                "to": "$string(payload)\t\t",
                "tot": "jsonata"
            }
        ],
        "action": "",
        "property": "",
        "from": "",
        "to": "",
        "reg": false,
        "x": 350,
        "y": 520,
        "wires": [
            [
                "b622dd82.eb625",
                "d994620a.ea092"
            ]
        ]
    },
    {
        "id": "19267ce4.02a55b",
        "type": "debug",
        "z": "e04b0f75.efce08",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "x": 890,
        "y": 200,
        "wires": []
    }
]

This is my code, I modified some parts.
Thanks.

4

Ok, that's good -- so there are no more issues?

5

Yes, still not work.
By the way my full msg object is:

{"payload":"temp|21#hr|31#lux|9","_msgid":"6f19bf01.e365f","url":"http://IP:PPPP/iot/d?k=KEY&i=sensor","method":"POST","headers":{"Service":"service","Content-Type":"text/plain","ServicePath":"/Sensor"}}
6

EDIT: resolved, IP have a problem with DNS and that was causing to not work.