express-fluid-handler

Fluid Request Response ExpressJS handler

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express-fluid-handler

Fluid Request Response ExpressJS handler

Installation

npm install --save express-fluid-handler

Usage

const Handler = require('express-fluid-handler')
const { Router } = require('express')

const router = Router()
router.get(
  '/',
  Handler(req => {
    // Do some logic and return a result.
  })
)

Reference

Handler(callback, [options])

OptionDescription
callbackMandatory callback which returns the result to be sent into the response
optionsOptional callbacks applied before or after the main callback
options.before(req)Function called just before the callback is called. It takes the request object in first and only argument. This function MUST return the request object.
options.after(req, result)Function called just after the callback has been called. It takes the request object and the result of the callback as arguments. This function MUST return the result.
options.preventGlobalBoolean which determines if the given handler execution must avoid global before and after callbacks. Local callbacks only are executed with this option to true.
options.errorFunction called whether an error occured in one of the given callbacks.
options.intermediate Boolean which determines if the given handler must stream a response or call the next callback of the express middleware system.
options.headersCan be either a function or an object. Specify custom headers to set into the response. The response takes the result as first argument and must return an object with the list of headers.

Handler.addBefore(callback)

Adds a global before callback, which is applied before options.before callback. You can add as many before callbacks as you want, but ensure they all returns the request object.

̀Handler.addAfter(callback)

Adds a global after callback, which is applied just before the result is sent into the Express response object. You can add as many after callbacks as you want, but ensure they all returns the result.

Whatever they are before or after callbacks, they are executed in the exact same order as they have been added.

Examples

You can read the test/lib.spec.js test file to check what is possible with this library.

Contributing

Feel free to fork this project and make it progress by submit PRs.

Ensure the tests are running by launch npm run test before submit any PR. A PR where tests are not running will be immediately declined.

License

This software is licensed under GNU GPL v3.

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