Fix CustomFunction deserializing escaped JSON strings

[mokeyish]

This PR relates to #1539 . If it is json after unescaping, it will be parsed into a json object.

[HenryHengZJ]

can you provide more description or elaboration what this PR trying to solve? screenshot/example of bug/errors/how to replicate the issue

[mokeyish]

@HenryHengZJ This PR relates to #1539 . If it is json after unescaping, it will be parsed into a json object.

[mokeyish]

[HenryHengZJ]

@mokeyish do you have some examples chatflow that I can replicate the issue?

[mokeyish]

@mokeyish do you have some examples chatflow that I can replicate the issue?

In my case it's LLMChain that outputs a JSON string, and then the next node is CustomFunction.

[HenryHengZJ]

@mokeyish do you have some examples chatflow that I can replicate the issue?

In my case it's LLMChain that outputs a JSON string, and then the next node is CustomFunction.

does the JSON string contains the escaped characters like FLOWISE_DOUBLE_QUOTE ? I was just thinking any downside of handling the conversion of escaped charactes before JSON parsing it

[mokeyish]

Yes, it contains FLOWISE_DOUBLE_QUOTE, so JSON parsing failed. then in the CustomFunction, it json string other than json object.

[HenryHengZJ]

We will have to do the same for IfElseFunction.ts as well

[HenryHengZJ]

we have the same logic here - https://github.com/FlowiseAI/Flowise/blob/main/packages/components/nodes/utilities/IfElseFunction/IfElseFunction.ts#L104

[mokeyish]

Okay, I'll change it later too.