Transformation with javascript dont work

Setup, Configuration and Use Scripts & Rules
1
  • Platform information:
    • Hardware: VM with 2GB of RAM
    • OS: Ubuntu Server 22.04.2 LTS
    • Java Runtime Environment: openJDK 18
  • Issue of the topic: please be detailed explaining your issue:

Hi,
I wanted to create a rule which reads the HTML Code of a internal Website which shows the state of our Meetings Room and set the state as the value of an item.
I created a Rule and a js File to transform the HTML into a String which says whether the Room is free or not.
My Problem is the everytime my item gets the value “NULL”.

Here are my Code

Rule:

var htmlCode = sendHttpGetRequest("http://192.168.0.90/Raumbuchung/GROB_Besprechungsraum/Raum?Raumnummer=1#MasterTable")
var roomstate = transform("JS", "raumstatus.js", htmlCode)
RaumStatus.postUpdate(roomstate)

The js file is stored under /etc/openhab/transform/raumstatus.js
js to transform the data:

(function(htmlCode){
    var freiBtn = htmlCode.match(/<input[^>]+value="Frei"[^>]+disabled/);
    var status = freiBtn ? "Frei" : "Besetzt";
    return status;
})(input)

I have tested my JavaScript and it is working
If i use RaumStatus.postUpdate(htmlCode) instead of RaumStatus.postUpdate(roomstate) in my rule i get the htmlCode as the value for my item, so this is working too.

Thanks for your help!

2

What do the logs say?

Do you have the JavaScript Transformation Service installed?

3

In the file /var/lib/openhab/log/openhab.log is nothing
And in /var/lib/openhab/logs/openhab.log is my last entry from the 13th June
Is there any other log files?

Yes i installed the addon Javascript Transformation

4

When i only execute

RaumStatus.postUpdate("Test")

my Item is getting updated buf if i execute

var roomstate = transform("JS", "raumstatus.js", htmlCode)
RaumStatus.postUpdate("Test1")

my Item isn’t getting the Value Test1

So the whole rule is getting fucked up when i try to execute the js?

5

Wrong Java version, openHAB 3 requires Java 11 and openHAB 4 Java 17. No other versions supported !

6

Ahh okeyy thanks
I will try it

7

It might cause your issue, but it might not….

8

Yes

9

It was the Java Version
Thank you!

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