LibreChat/api/server/controllers
Danny Avila a7aa4dc91b
🚦 refactor: Concurrent Request Limiter for Resumable Streams (#11167)
* feat: Implement concurrent request handling in ResumableAgentController

- Introduced a new concurrency management system by adding `checkAndIncrementPendingRequest` and `decrementPendingRequest` functions to manage user request limits.
- Replaced the previous `concurrentLimiter` middleware with a more integrated approach directly within the `ResumableAgentController`.
- Enhanced violation logging and request denial for users exceeding their concurrent request limits.
- Removed the obsolete `concurrentLimiter` middleware file and updated related imports across the codebase.

* refactor: Simplify error handling in ResumableAgentController and enhance SSE error management

- Removed the `denyRequest` middleware and replaced it with a direct response for concurrent request violations in the ResumableAgentController.
- Improved error handling in the `useResumableSSE` hook to differentiate between network errors and other error types, ensuring more informative error responses are sent to the error handler.

* test: Enhance MCP server configuration tests with new mocks and improved logging

- Added mocks for MCP server registry and manager in `index.spec.js` to facilitate testing of server configurations.
- Updated debug logging in `initializeMCPs.spec.js` to simplify messages regarding server configurations, improving clarity in test outputs.

* refactor: Enhance concurrency management in request handling

- Updated `checkAndIncrementPendingRequest` and `decrementPendingRequest` functions to utilize Redis for atomic request counting, improving concurrency control.
- Added error handling for Redis operations to ensure requests can proceed even during Redis failures.
- Streamlined cache key generation for both Redis and in-memory fallback, enhancing clarity and performance in managing pending requests.
- Improved comments and documentation for better understanding of the concurrency logic and its implications.

* refactor: Improve atomicity in Redis operations for pending request management

- Updated `checkAndIncrementPendingRequest` to utilize Redis pipelines for atomic INCR and EXPIRE operations, enhancing concurrency control and preventing edge cases.
- Added error handling for pipeline execution failures to ensure robust request management.
- Improved comments for clarity on the concurrency logic and its implications.
2026-01-01 11:10:56 -05:00
..
agents 🚦 refactor: Concurrent Request Limiter for Resumable Streams (#11167) 2026-01-01 11:10:56 -05:00
assistants 🔧 fix: Express v5 Optional chaining for endpoint retrieval in Assistants Controllers (#10946) 2025-12-12 14:04:28 -05:00
auth 🧹 chore: Cleanup Logger and Utility Imports (#9935) 2025-10-01 23:30:47 -04:00
AuthController.js 🔄 fix: Resolve Infinite Refresh Loop on OpenID Provider/Database Switch (#11002) 2025-12-16 18:42:00 -05:00
Balance.js 🏗️ refactor: Extract DB layers to data-schemas for shared use (#7650) 2025-05-30 22:18:13 -04:00
EndpointController.js refactor: Integrate Capabilities into Agent File Uploads and Tool Handling (#5048) 2024-12-19 13:04:48 -05:00
FavoritesController.js 📌 feat: Pin Agents and Models in the Sidebar (#10634) 2025-12-11 16:38:20 -05:00
mcp.js 🔒 feat: Add MCP server domain restrictions for remote transports (#11013) 2025-12-18 13:57:49 -05:00
ModelController.js 🧹 chore: Cleanup Logger and Utility Imports (#9935) 2025-10-01 23:30:47 -04:00
PermissionsController.js 🏗️ feat: Dynamic MCP Server Infrastructure with Access Control (#10787) 2025-12-11 16:38:37 -05:00
PluginController.js 🧰 refactor: Decouple MCP Tools from System Tools (#9748) 2025-09-21 07:56:40 -04:00
PluginController.spec.js 🧰 refactor: Decouple MCP Tools from System Tools (#9748) 2025-09-21 07:56:40 -04:00
tools.js 🛜 refactor: Streamline App Config Usage (#9234) 2025-08-26 12:10:18 -04:00
TwoFactorController.js 🧵 refactor: Migrate Endpoint Initialization to TypeScript (#10794) 2025-12-11 16:37:16 -05:00
UserController.js 🏗️ feat: Dynamic MCP Server Infrastructure with Access Control (#10787) 2025-12-11 16:38:37 -05:00