🔧 fix: Keyv and Proxy Issues, and More Memory Optimizations (#6867)

* chore: update @librechat/agents dependency to version 2.4.15

* refactor: Prevent memory leaks by nullifying boundModel.client in disposeClient function

* fix: use of proxy, use undici

* chore: update @librechat/agents dependency to version 2.4.16

* Revert "fix: use of proxy, use undici"

This reverts commit 83153cd582.

* fix: ensure fetch is imported for HTTP requests

* fix: replace direct OpenAI import with CustomOpenAIClient from @librechat/agents

* fix: update keyv peer dependency to version 5.3.2

* fix: update keyv dependency to version 5.3.2

* refactor: replace KeyvMongo with custom implementation and update flow state manager usage

* fix: update @librechat/agents dependency to version 2.4.17

* ci: update OpenAIClient tests to use CustomOpenAIClient from @librechat/agents

* refactor: remove KeyvMongo mock and related dependencies

api/app/clients/OpenAIClient.js

@@ -1,7 +1,6 @@
-const OpenAI = require('openai');
 const { OllamaClient } = require('./OllamaClient');
 const { HttpsProxyAgent } = require('https-proxy-agent');
-const { SplitStreamHandler } = require('@librechat/agents');
+const { SplitStreamHandler, CustomOpenAIClient: OpenAI } = require('@librechat/agents');
 const {
   Constants,
   ImageDetail,

api/app/clients/generators.js

@@ -1,3 +1,4 @@
+const fetch = require('node-fetch');
 const { GraphEvents } = require('@librechat/agents');
 const { logger, sendEvent } = require('~/config');
 

api/app/clients/specs/BaseClient.test.js

@@ -32,7 +32,7 @@ jest.mock('~/models', () => ({
 
 const { getConvo, saveConvo } = require('~/models');
 
-jest.mock('@langchain/openai', () => {
+jest.mock('@librechat/agents', () => {
   return {
     ChatOpenAI: jest.fn().mockImplementation(() => {
       return {};

api/app/clients/specs/OpenAIClient.test.js

@@ -1,9 +1,7 @@
 jest.mock('~/cache/getLogStores');
 require('dotenv').config();
-const OpenAI = require('openai');
-const getLogStores = require('~/cache/getLogStores');
 const { fetchEventSource } = require('@waylaidwanderer/fetch-event-source');
-const { genAzureChatCompletion } = require('~/utils/azureUtils');
+const getLogStores = require('~/cache/getLogStores');
 const OpenAIClient = require('../OpenAIClient');
 jest.mock('meilisearch');
 
@@ -36,19 +34,21 @@ jest.mock('~/models', () => ({
   updateFileUsage: jest.fn(),
 }));
 
-jest.mock('@langchain/openai', () => {
-  return {
-    ChatOpenAI: jest.fn().mockImplementation(() => {
-      return {};
-    }),
-  };
+// Import the actual module but mock specific parts
+const agents = jest.requireActual('@librechat/agents');
+const { CustomOpenAIClient } = agents;
+
+// Also mock ChatOpenAI to prevent real API calls
+agents.ChatOpenAI = jest.fn().mockImplementation(() => {
+  return {};
+});
+agents.AzureChatOpenAI = jest.fn().mockImplementation(() => {
+  return {};
 });
 
-jest.mock('openai');
-
-jest.spyOn(OpenAI, 'constructor').mockImplementation(function (...options) {
-  // We can add additional logic here if needed
-  return new OpenAI(...options);
+// Mock only the CustomOpenAIClient constructor
+jest.spyOn(CustomOpenAIClient, 'constructor').mockImplementation(function (...options) {
+  return new CustomOpenAIClient(...options);
 });
 
 const finalChatCompletion = jest.fn().mockResolvedValue({
@@ -120,7 +120,13 @@ const create = jest.fn().mockResolvedValue({
   ],
 });
 
-OpenAI.mockImplementation(() => ({
+// Mock the implementation of CustomOpenAIClient instances
+jest.spyOn(CustomOpenAIClient.prototype, 'constructor').mockImplementation(function () {
+  return this;
+});
+
+// Create a mock for the CustomOpenAIClient class
+const mockCustomOpenAIClient = jest.fn().mockImplementation(() => ({
   beta: {
     chat: {
       completions: {
@@ -135,6 +141,8 @@ OpenAI.mockImplementation(() => ({
   },
 }));
 
+CustomOpenAIClient.mockImplementation = mockCustomOpenAIClient;
+
 describe('OpenAIClient', () => {
   beforeEach(() => {
     const mockCache = {
@@ -559,41 +567,6 @@ describe('OpenAIClient', () => {
       expect(requestBody).toHaveProperty('model');
       expect(requestBody.model).toBe(model);
     });
-
-    it('[Azure OpenAI] should call chatCompletion and OpenAI.stream with correct args', async () => {
-      // Set a default model
-      process.env.AZURE_OPENAI_DEFAULT_MODEL = 'gpt4-turbo';
-
-      const onProgress = jest.fn().mockImplementation(() => ({}));
-      client.azure = defaultAzureOptions;
-      const chatCompletion = jest.spyOn(client, 'chatCompletion');
-      await client.sendMessage('Hi mom!', {
-        replaceOptions: true,
-        ...defaultOptions,
-        modelOptions: { model: 'gpt4-turbo', stream: true },
-        onProgress,
-        azure: defaultAzureOptions,
-      });
-
-      expect(chatCompletion).toHaveBeenCalled();
-      expect(chatCompletion.mock.calls.length).toBe(1);
-
-      const chatCompletionArgs = chatCompletion.mock.calls[0][0];
-      const { payload } = chatCompletionArgs;
-
-      expect(payload[0].role).toBe('user');
-      expect(payload[0].content).toBe('Hi mom!');
-
-      // Azure OpenAI does not use the model property, and will error if it's passed
-      // This check ensures the model property is not present
-      const streamArgs = stream.mock.calls[0][0];
-      expect(streamArgs).not.toHaveProperty('model');
-
-      // Check if the baseURL is correct
-      const constructorArgs = OpenAI.mock.calls[0][0];
-      const expectedURL = genAzureChatCompletion(defaultAzureOptions).split('/chat')[0];
-      expect(constructorArgs.baseURL).toBe(expectedURL);
-    });
   });
 
   describe('checkVisionRequest functionality', () => {