Express HTTP Proxy Middleware

express-http-proxy is an Express.js middleware designed for proxying incoming HTTP requests to a specified target host. It offers extensive customization through hooks, enabling developers to modify incoming requests before they reach the proxy target and decorate outgoing responses before they are returned to the client. The package is currently at version 2.1.2 and is actively maintained, having received updates like the significant v2.0.0 release that upgraded underlying dependencies and ensured compatibility with modern Node.js environments (16, 18, and 20). While not on a strict, frequent release cadence, updates are issued to address compatibility and dependency needs, especially for critical Node.js versions. Its key differentiator lies in its comprehensive set of configurable hooks for request and response transformation, making it suitable for scenarios requiring fine-grained control over proxy behavior within an Express application, such as API gateways or hiding internal service endpoints.