Function ErrorHandler

Add a method of a controller as an error handler.

Example

import { Controller, ControllerBase, ErrorHandler, GET, IHttpRequest, IHttpResponse } from '@egomobile/http-server'

@Controller()
export default class MyController extends ControllerBase {
  @GET()
  async index(request: IHttpRequest, response: IHttpResponse) {
    throw new Error('Something went wrong!')
  }

  @ErrorHandler()  // mark that method as default error handler
                   // inside that controller
  async handleError(error: any, request: IHttpRequest, response: IHttpResponse) {
    const errorMessage = Buffer.from('ERROR: ' + String(error), 'utf8')

    response.writeHead(500, {
      'Content-Length': String(errorMessage.length)
    })
    response.write(errorMessage)

    response.end()
  }
}
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