[SOLVED] JSONPATH since 2.5 M3

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1

All,

since 2.5 M3 I get log entries I never had before:

Transformation 'JSONPATH($[0].sensordatavalues[1].value)' threw an exception. [response=<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>

My item:
Number Particles_PM2 "PM2 Partikel [%s] µg/m3" (G_jdbc) {http="<[cacheLuft:600000:JSONPATH($[0].sensordatavalues[1].value)]" }

However, the item is updated frequently and the JSONPATH is correct (according to online JSONPATH tester)

Any suggestion?

2

It looks like the input is not a valid JSON. Where does it come from? Probably something else changed?

3

Thanks, Jan.

I just checked it with JSONPATH tester.
The data is coming from here:
http://api.luftdaten.info/v1/sensor/1000/

and the data of the item is updated.

4

Maybe the http binding changed? Or it‘s just coincidence and the server response looks different? I can‘t imagine what should change the jsonpath behaviour. You could try to open that page in a Webbrowser and click „show source“. If the headers are there, the transformation warning is correct.

5

I can confirm that the JSONPATH transform works with that JSON string.
By the way, I know where you live now…
I would suggest removing that link and posting an amended json string.

@J-N-K suggestion is good, however the response page is a jsonstring only.
Can you post the http binding config please?

6

If the item does update, are you getting those exceptions on every request or only ln some?
I’d try to check if all http requests get a complete return.

1 Like
7

That’s a valid point.
Is does NOT succeed every now and then.
Before M3 I did not see this at all.
Maybe I just need to live with it… or increase the time out timer for http.

8

After setting the timeout in http from 13 sec to 20 sec I don’t see the error anymore.
:+1: