changes & fixes for various issues in chatflow config (#4314)

* Chatflow config - rate limit and override config were overwriting changes.

* prevent post processing JS function from escaping as JSON...

* non-streaming follow up prompts need to be escaped twice

* prevent post processing JS function from escaping as JSON...

* Adding file mimetypes for full file upload...

* lint..

* fixing the issue with storing only filtered nodes..

* return doc store processing response without await when queue mode and request is from UI

---------

Co-authored-by: Henry <hzj94@hotmail.com>

packages/server/src/utils/buildChatflow.ts

@@ -14,7 +14,8 @@ import {
     mapMimeTypeToInputField,
     mapExtToInputField,
     getFileFromUpload,
-    removeSpecificFileFromUpload
+    removeSpecificFileFromUpload,
+    handleEscapeCharacters
 } from 'flowise-components'
 import { StatusCodes } from 'http-status-codes'
 import {
@@ -665,6 +666,7 @@ export const executeFlow = async ({
                     const postProcessingFunction = JSON.parse(chatflowConfig?.postProcessing?.customFunction)
                     const nodeInstanceFilePath = componentNodes['customFunction'].filePath as string
                     const nodeModule = await import(nodeInstanceFilePath)
+                    //set the outputs.output to EndingNode to prevent json escaping of content...
                     const nodeData = {
                         inputs: { javascriptFunction: postProcessingFunction },
                         outputs: { output: 'output' }
@@ -681,7 +683,13 @@ export const executeFlow = async ({
                     }
                     const customFuncNodeInstance = new nodeModule.nodeClass()
                     let moderatedResponse = await customFuncNodeInstance.init(nodeData, question, options)
-                    result.text = moderatedResponse
+                    if (typeof moderatedResponse === 'string') {
+                        result.text = handleEscapeCharacters(moderatedResponse, true)
+                    } else if (typeof moderatedResponse === 'object') {
+                        result.text = '```json\n' + JSON.stringify(moderatedResponse, null, 2) + '\n```'
+                    } else {
+                        result.text = moderatedResponse
+                    }
                     resultText = result.text
                 } catch (e) {
                     logger.log('[server]: Post Processing Error:', e)