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Feature/sse (#3125)

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* Base changes for ServerSide Events (instead of socket.io)

* lint fixes

* adding of interface and separate methods for streaming events

* lint

* first draft, handles both internal and external prediction end points.

* lint fixes

* additional internal end point for streaming and associated changes

* return streamresponse as true to build agent flow

* 1) JSON formatting for internal events
2) other fixes

* 1) convert internal event to metadata to maintain consistency with external response

* fix action and metadata streaming

* fix for error when agent flow is aborted

* prevent subflows from streaming and other code cleanup

* prevent streaming from enclosed tools

* add fix for preventing chaintool streaming

* update lock file

* add open when hidden to sse

* Streaming errors

* Streaming errors

* add fix for showing error message

---------

Co-authored-by: Henry <hzj94@hotmail.com>
This commit is contained in:
Vinod Kiran
2024-09-17 12:31:25 +05:30
committed by GitHub
parent 7a4c7efcab
commit 26444ac3ae
47 changed files with 1021 additions and 327 deletions
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packages/components/nodes/chains/VectorDBQAChain/VectorDBQAChain.ts
+10 -4
View File
@@ -2,7 +2,7 @@ import { BaseLanguageModel } from '@langchain/core/language_models/base'
import { VectorStore } from '@langchain/core/vectorstores'
import { VectorDBQAChain } from 'langchain/chains'
import { ConsoleCallbackHandler, CustomChainHandler, additionalCallbacks } from '../../../src/handler'
import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
import { ICommonObject, INode, INodeData, INodeParams, IServerSideEventStreamer } from '../../../src/Interface'
import { getBaseClasses } from '../../../src/utils'
import { checkInputs, Moderation } from '../../moderation/Moderation'
import { formatResponse } from '../../outputparsers/OutputParserHelpers'
@@ -64,13 +64,19 @@ class VectorDBQAChain_Chains implements INode {
const chain = nodeData.instance as VectorDBQAChain
const moderations = nodeData.inputs?.inputModeration as Moderation[]
const shouldStreamResponse = options.shouldStreamResponse
const sseStreamer: IServerSideEventStreamer = options.sseStreamer as IServerSideEventStreamer
const chatId = options.chatId
if (moderations && moderations.length > 0) {
try {
// Use the output of the moderation chain as input for the VectorDB QA Chain
input = await checkInputs(moderations, input)
} catch (e) {
await new Promise((resolve) => setTimeout(resolve, 500))
//streamResponse(options.socketIO && options.socketIOClientId, e.message, options.socketIO, options.socketIOClientId)
// if (options.shouldStreamResponse) {
// streamResponse(options.sseStreamer, options.chatId, e.message)
// }
return formatResponse(e.message)
}
}
@@ -81,8 +87,8 @@ class VectorDBQAChain_Chains implements INode {
const loggerHandler = new ConsoleCallbackHandler(options.logger)
const callbacks = await additionalCallbacks(nodeData, options)
if (options.socketIO && options.socketIOClientId) {
const handler = new CustomChainHandler(options.socketIO, options.socketIOClientId)
if (shouldStreamResponse) {
const handler = new CustomChainHandler(sseStreamer, chatId)
const res = await chain.call(obj, [loggerHandler, handler, ...callbacks])
return res?.text
} else {