Extending a middy middleware function in nodejs

0 votes

I'd like to enhance the httpErrorhandler middleware and create a wrapper around it in my nodejs lambda code.

Currently, I have something similar to this.

module.exports.handler=middy(handle).use(httpErrorHandler(LoggingFactory.getLogger().log))

I'd like to make a customHttpErrorHandler that acts as a wrapper around httpErrorHandler.

module.exports.handler=middy(handle).use(customHttpErrorHandler(LoggingFactory.getLogger().log))

Is that even possible? What should I provide in customHttpErrorHandler? There isn't any new functionality that needs to be added. The control should be passed to the normal httpErrorHandler via this new customHandler.

Below is an example of a customHttpErrorHandler (pseudo code).

connectHttpErrorHandler = (logger) => httpErrorHandler(logger)
May 30, 2022 in Node-js by Neha
• 9,060 points
938 views

1 answer to this question.

0 votes

Your pseudocode comes close to being correct. httpErrorHandler takes an options object in Middy >=2.0.0. Documentation can be found at https://github.com/middyjs/middy/tree/main/packages/http-error-handler.

const connectHttpErrorHandler = (logger) => httpErrorHandler({logger})

const logger = LoggingFactory.getLogger().log

module.exports.handler = middy(handler)
  .use(customHttpErrorHandler(logger))
answered May 30, 2022 by Vaani
• 7,060 points

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