Add prefix code to add to all requests

[tristan-ovh]

Hello,
It is possible to set variables in the warp10 data source that are available in all requests.
But it would be even better to be able to add any code (not just a variable) that would be inserted in all requests. For example I could add one line to raise the quota of number of points that can be fetched.

[StevenLeRoux]

Hello Tristan,

Sure! It's called "Execution constants" in the data source and you can put whatever you need in it.

Here is an example on how we use it :

• set a token string, reuse it in the scripts using this source

TOKEN 1234...abcd

• set a macro, call it in the script

MAXOPS <% 'stack.maxops.hard' STACKATTRIBUTE DUP <% ISNULL ! %> <% MAXOPS %> <% DROP %> IFTE %>

• set a secure script, call it in the script

MYMACRO <% 'tIf2DfGEegGrewJb5O5LRfa4T3LHL8yUeVPEt4V4nykgn4_iYowmJ1ydGwVItcRVfFP.L34pfRwZ_ecg7LVc0bbJdMWuCEetsf0jnGCBE3(64frer.EZERzETGT789FgNAWdBluPsPhcwCcVa4kJnhkRwhH7yn_802TiwZVTzgZPtghkRgBkpIQt.NHJeEs9zq4LeNwBz9EeezZEffR53F' EVALSECURE %>

[miton18]

Hi !
There is a tips, the variables you put in the datasource configuration can be a Warp10 macro.
Your execution variable value must starts with a <% and ends with a %> else it will be interpreted as a string

Example:

Variable hello in the datasource

<% 'Hello !' %>

In your panel query:

@hello

[aurrelhebert]

Yes but this doesn't fix Tristan issue here, as he still have to call the Macro in each of its scripts to be executed :/
However it could be a new option in the DataSource? Something like "executed macro"

[tristan-ovh]

Indeed using a macro and calling it everywhere could help factorize a bit the code. If it were executed directly, it would be even simpler :)

But thinking again about this problem, for us, having this "script header" in the datasource would not be so great: we have 3 different data sources, and they are in an organization where datasource modification is complicated. The most logical would be to have this code common to all panels of a dashboard, but I guess Grafana doesn't allow that.