dherault/serverless-offline

Features

• Local Serverless Emulation - Emulates the full serverless stack locally, including an HTTP server that mimics cloud gateway request lifecycles.
• Local Cloud Simulation - Provides a comprehensive local simulation of serverless events, WebSocket connections, and SDK invocations.
• Serverless Framework Plugins - Acts as a plugin for the Serverless Framework to enable local cloud infrastructure emulation.
• Gateway Service Mocks - Mimics the request lifecycle, routing, and authorizers of the AWS API Gateway.
• Local Lambda Simulation - Runs and tests serverless functions on a local machine by mocking event servers to process requests.
• Local Function Execution - Executes serverless functions locally using worker threads or containers to verify business logic.
• API Gateway Simulators - Simulates an HTTP gateway locally to test request routing, CORS settings, and response mapping without a live provider.
• Local SDK Invocation Simulation - Creates local endpoints that mimic cloud APIs to trigger functions using a standard software development kit.
• Bidirectional WebSocket Streaming - Provides local endpoints for full-duplex communication channels by mimicking cloud WebSocket routes.
• Websocket Connection Managers - Provides an API endpoint to manage persistent WebSocket connections and send messages back to connected clients.
• Serverless WebSocket Emulations - Simulates bidirectional WebSocket connections and message routing locally for real-time application development.
• WebSocket Communication - Supports bidirectional traffic by mimicking WebSocket routes and providing a mechanism to send messages back to clients.
• Isolated Execution Environments - Runs functions in isolated environments such as worker threads or containers to simulate runtime constraints.
• Runtime Isolation Modes - Runs functions in varying environments including worker threads, child processes, or containers to simulate runtime constraints.
• Remote Layer Mounting - Downloads and mounts remote dependency layers into local containers to provide required libraries.
• Virtual Dependency Layers - Downloads remote library layers and mounts them into the local execution environment to provide required dependencies.
• Layer Simulations - Emulates shared dependency layers by mapping host directories into the local runtime container.
• Local Endpoint Invocations - Triggers local functions via endpoints using standard clients to test logic in isolation.
• Local Serverless Testing - Provides local runtime environments for testing serverless functions and their interactions.
• HTTP Request Routing - Implements mechanisms for mapping HTTP paths to specific handler components locally.
• Multi-Language Runtime Support - Supports multiple programming language runtimes through various isolation modes like child processes or containers.
• Access Policies - Validates requests using custom or JWT authorizers to determine resource access permissions.
• Custom Authentication Providers - Integrates external authentication strategies via custom provider functions during local invocation.
• Custom Authorization Logic - Emulates token, custom, and JWT authorizers to execute business-specific access validation logic.
• Serverless Request Authorizers - Implements custom serverless logic to validate incoming API requests and mock authorizer responses.
• Authorization Mocking - Intercepts requests to validate tokens or JWTs using simulated identity injection for local access control testing.
• Service Invocation Emulations - Hosts a local HTTP server that emulates service invocation APIs to allow local functions to call each other.
• Time-Based Event Scheduling - Executes function handlers automatically based on time-based configurations defined in local service settings.
• Request and Response Transformers - Provides functions that modify data payloads during the request and response lifecycle.
• Path-Based Handler Routings - Routes HTTP requests matching relative paths using proxy variables to a custom handler function.
• Catch-All Path Captures - Captures all remaining path segments after a fixed prefix to route multiple requests to a single function.

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