json

Parse JSON in variable into another variable.

Property	Type	Description
delete	boolean	If this is set to true, the selected key will be deleted from the JSON and the modified JSON will be passed to the `processor`.
format	enum	Conversion to apply on the matching parts with ’toVar’ or ’toArray’ shortcuts. Options: `BYTEBUF`Store the buffer directly. Beware that this may cause memory leaks! `BYTES`Store data as byte array. `STRING`Interprets the bytes as UTF-8 string.
fromVar	String	Variable to load JSON from.
processor	Processor.Builder	Add one or more processors.
query	String	Query selecting the part of JSON.
replace	Transformer.Builder	Custom transformation executed on the value of the selected item. Note that the output value must contain quotes (if applicable) and be correctly escaped.
replace (alternative)	String	Replace value of selected item with value generated through a pattern. Note that the result must contain quotes and be correctly escaped.
toArray	String	Shortcut to store selected parts in an array in the session. Must follow the pattern `variable[maxSize]`
toVar	String	Shortcut to store first match in given variable. Further matches are ignored.
unquote	boolean	Automatically unquote and unescape the input values. By default true.

replace

Custom transformation executed on the value of the selected item. Note that the output value must contain quotes (if applicable) and be correctly escaped.

Property	Type	Description
actions	ActionsTransformer.Builder	This transformer stores the (defragmented) input into a variable, using requested format. After that it executes all the actions and fetches transformed value using the pattern.
pattern	Pattern.TransformerBuilder	Use pattern replacing session variables.

replace.actions

This transformer stores the (defragmented) input into a variable, using requested format. After that it executes all the actions and fetches transformed value using the pattern.

Property	Type	Description
actions	Action.Builder	Actions to be executed.
format	enum	Format into which should this transformer convert the buffers before storing. Default is `STRING`. Options: `BYTEBUF`Store the buffer directly. Beware that this may cause memory leaks! `BYTES`Store data as byte array. `STRING`Interprets the bytes as UTF-8 string.
pattern	String	Pattern to use when fetching the transformed value.
var	String	Variable used as the intermediate storage for the data.

replace.pattern

Use pattern replacing session variables.

Inline definition
The pattern formatting string.

Property	Type	Description
pattern	String	Use pattern replacing session variables.

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Last modified October 1, 2025: Update documentation for the 0.28 release (4927d0d)