Use HTTP agent to read JSON-RPC 2.0

[doba]

Hi
I would like to connect to the Teltonika modem device using json-rpc 2 and using HTTP agent in zabbix server.
But I can not use a name, password to get data immediately in one step.

When I read the manual from the teltonika site, the first step is to get a token. The token expires after 300 s, so I read the item every 240s (4m). The second step is to get data using the token.

First I made an HTTP agent to POST json and get a token in response. I have successfully got json answer. I have set preprocessing using Jsonpath and store token every 4 minutes. In the next step, I would like to use a token to login and get data.
Is it possible to use (link) value from the first step to send another HTTP POST request?


First step - sucesfully DONE






Second step - I haven´t done yet automatically. Tested with token manually and works. See the picture below.



Can I substitute token with the latest value of token saved in key request (from my first step)? Something like: {my_host:request.last()} ? Is there another option?

[doba]

Hi
Is it possible to save a value of the item to macro via Javascript preprocessing?
First rule is JSON path that work, second doesn´t.
I tried this code, but I got an error.




Thanks in advance. D.

[cyber]

Can I substitute token with the latest value of token saved in key request (from my first step)? Something like: {my_host:request.last()} ? Is there another option?

I think directly it is not possible...

As docs (https://www.zabbix.com/documentation...ed_by_location) say
{host:key.func(param)} can only be used in
→ Trigger-based notifications and commands
→ Problem update notifications and commands
→ Map element/shape labels
→ Link labels in maps
→ Graph names
→ Trigger expressions

So, not on HTTP items "query" field...

But you can use user macros there (https://www.zabbix.com/documentation..._location_user)... So, with a bit of coding (JS preprocessing...) you should be able to update a host level macro, where you keep that acquired value... Just don't ask me for any examples.. I suck at coding.. But I have seen similar approach to update some date related global macros. Or you move that first step, acquiring a token, into a script somewhere on zabbix server, and update that macro from there, gives you more coding language options....

[cyber]

You need to do a API call inside that JS to set a macro value.