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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
Download Patch File Download Diff File Expand all files Collapse all files
packages/components/nodes/agents/ToolAgent/ToolAgent.ts
+26 -10
View File
@@ -8,7 +8,16 @@ import { ChatPromptTemplate, MessagesPlaceholder, HumanMessagePromptTemplate, Pr
import { formatToOpenAIToolMessages } from 'langchain/agents/format_scratchpad/openai_tools'
import { type ToolsAgentStep } from 'langchain/agents/openai/output_parser'
import { getBaseClasses, handleEscapeCharacters } from '../../../src/utils'
import { FlowiseMemory, ICommonObject, INode, INodeData, INodeParams, IUsedTool, IVisionChatModal } from '../../../src/Interface'
import {
FlowiseMemory,
ICommonObject,
INode,
INodeData,
INodeParams,
IServerSideEventStreamer,
IUsedTool,
IVisionChatModal
} from '../../../src/Interface'
import { ConsoleCallbackHandler, CustomChainHandler, additionalCallbacks } from '../../../src/handler'
import { AgentExecutor, ToolCallingAgentOutputParser } from '../../../src/agents'
import { Moderation, checkInputs, streamResponse } from '../../moderation/Moderation'
@@ -100,7 +109,9 @@ class ToolAgent_Agents implements INode {
const memory = nodeData.inputs?.memory as FlowiseMemory
const moderations = nodeData.inputs?.inputModeration as Moderation[]
const isStreamable = options.socketIO && options.socketIOClientId
const shouldStreamResponse = options.shouldStreamResponse
const sseStreamer: IServerSideEventStreamer = options.sseStreamer as IServerSideEventStreamer
const chatId = options.chatId
if (moderations && moderations.length > 0) {
try {
@@ -108,8 +119,9 @@ class ToolAgent_Agents implements INode {
input = await checkInputs(moderations, input)
} catch (e) {
await new Promise((resolve) => setTimeout(resolve, 500))
if (isStreamable)
streamResponse(options.socketIO && options.socketIOClientId, e.message, options.socketIO, options.socketIOClientId)
if (shouldStreamResponse) {
streamResponse(sseStreamer, chatId, e.message)
}
return formatResponse(e.message)
}
}
@@ -123,15 +135,19 @@ class ToolAgent_Agents implements INode {
let sourceDocuments: ICommonObject[] = []
let usedTools: IUsedTool[] = []
if (isStreamable) {
const handler = new CustomChainHandler(options.socketIO, options.socketIOClientId)
if (shouldStreamResponse) {
const handler = new CustomChainHandler(sseStreamer, chatId)
res = await executor.invoke({ input }, { callbacks: [loggerHandler, handler, ...callbacks] })
if (res.sourceDocuments) {
options.socketIO.to(options.socketIOClientId).emit('sourceDocuments', flatten(res.sourceDocuments))
if (sseStreamer) {
sseStreamer.streamSourceDocumentsEvent(chatId, flatten(res.sourceDocuments))
}
sourceDocuments = res.sourceDocuments
}
if (res.usedTools) {
options.socketIO.to(options.socketIOClientId).emit('usedTools', res.usedTools)
if (sseStreamer) {
sseStreamer.streamUsedToolsEvent(chatId, flatten(res.usedTools))
}
usedTools = res.usedTools
}
// If the tool is set to returnDirect, stream the output to the client
@@ -140,8 +156,8 @@ class ToolAgent_Agents implements INode {
inputTools = flatten(inputTools)
for (const tool of res.usedTools) {
const inputTool = inputTools.find((inputTool: Tool) => inputTool.name === tool.tool)
if (inputTool && inputTool.returnDirect) {
options.socketIO.to(options.socketIOClientId).emit('token', tool.toolOutput)
if (inputTool && inputTool.returnDirect && shouldStreamResponse) {
sseStreamer.streamTokenEvent(chatId, tool.toolOutput)
}
}
}