Create a Basic Framework with Express (Part 3)

Error pages (404, 400, 500)

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Bryan
·

2 min read

We need to show error pages to users, ie: 404, 500, 400

  1. Create the views

    • views/layouts/main.hbs

        <html lang="en"><head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <meta http-equiv="X-UA-Compatible" content="ie=edge">
      <link rel="icon" type="image/png" href="{{route  '/favicon.png' }}" />
      <title>{{config 'APP_NAME' }}</title>
      <script src="https://cdn.tailwindcss.com"></script>
      <style>
          body {
              background-image: url("data:image/svg+xml,%3Csvg width='180' height='180' viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M81.28 88H68.413l19.298 19.298L81.28 88zm2.107 0h13.226L90 107.838 83.387 88zm15.334 0h12.866l-19.298 19.298L98.72 88zm-32.927-2.207L73.586 78h32.827l.5.5 7.294 7.293L115.414 87l-24.707 24.707-.707.707L64.586 87l1.207-1.207zm2.62.207L74 80.414 79.586 86H68.414zm16 0L90 80.414 95.586 86H84.414zm16 0L106 80.414 111.586 86h-11.172zm-8-6h11.173L98 85.586 92.414 80zM82 85.586L87.586 80H76.414L82 85.586zM17.414 0L.707 16.707 0 17.414V0h17.414zM4.28 0L0 12.838V0h4.28zm10.306 0L2.288 12.298 6.388 0h8.198zM180 17.414L162.586 0H180v17.414zM165.414 0l12.298 12.298L173.612 0h-8.198zM180 12.838L175.72 0H180v12.838zM0 163h16.413l.5.5 7.294 7.293L25.414 172l-8 8H0v-17zm0 10h6.613l-2.334 7H0v-7zm14.586 7l7-7H8.72l-2.333 7h8.2zM0 165.414L5.586 171H0v-5.586zM10.414 171L16 165.414 21.586 171H10.414zm-8-6h11.172L8 170.586 2.414 165zM180 163h-16.413l-7.794 7.793-1.207 1.207 8 8H180v-17zm-14.586 17l-7-7h12.865l2.333 7h-8.2zM180 173h-6.613l2.334 7H180v-7zm-21.586-2l5.586-5.586 5.586 5.586h-11.172zM180 165.414L174.414 171H180v-5.586zm-8 5.172l5.586-5.586h-11.172l5.586 5.586zM152.933 25.653l1.414 1.414-33.94 33.942-1.416-1.416 33.943-33.94zm1.414 127.28l-1.414 1.414-33.942-33.94 1.416-1.416 33.94 33.943zm-127.28 1.414l-1.414-1.414 33.94-33.942 1.416 1.416-33.943 33.94zm-1.414-127.28l1.414-1.414 33.942 33.94-1.416 1.416-33.94-33.943zM0 85c2.21 0 4 1.79 4 4s-1.79 4-4 4v-8zm180 0c-2.21 0-4 1.79-4 4s1.79 4 4 4v-8zM94 0c0 2.21-1.79 4-4 4s-4-1.79-4-4h8zm0 180c0-2.21-1.79-4-4-4s-4 1.79-4 4h8z' fill='%239C92AC' fill-opacity='0.4' fill-rule='evenodd'/%3E%3C/svg%3E");
          }
      </style>
  </head>
  <body class="bg-gray-100">
      {{{ body }}}
  </body>
  </html>

    • views/errors/404.hbs

        <div class="min-h-screen flex flex-col">
      <div class="min-h-screen flex justify-center flex-wrap content-center">
          <div class="bg-white rounded-md w-10/12 md:w-1/2 lg:w-4/12 flex shadow">
              <div class="w-full p-8 flex flex-col content-center text-center">
                  <h1 class="p-4 text-6xl text-red-500 font-semibold">404</h1>
                  <p class="p-4 text-2xl font-medium">Page Not Found</p>
              </div>
          </div>
      </div>
  </div>

    • views/errors/500.hbs

        <div class="min-h-screen flex flex-col">
      <div class="min-h-screen flex justify-center flex-wrap content-center">
          <div class="bg-white rounded-md w-10/12 md:w-1/2 lg:w-4/12 flex shadow">
              <div class="w-full p-8 flex flex-col content-center text-center">
                  <h1 class="p-4 text-6xl text-red-500 font-semibold">{{status}}</h1>
                  <p class="p-4 text-2xl font-medium">Internal Server Error</p>
              </div>
          </div>
      </div>
  </div>

    • views/errors/400.hbs

        <div class="min-h-screen flex flex-col">
      <div class="min-h-screen flex justify-center flex-wrap content-center">
          <div class="bg-white rounded-md w-10/12 md:w-1/2 lg:w-4/12 flex shadow">
              <div class="w-full p-8 flex flex-col content-center text-center">
                  <h1 class="p-4 text-6xl text-red-500 font-semibold">400</h1>
                  <p class="p-4 text-2xl font-medium">Your request resulted in an error</p>
              </div>
          </div>
      </div>
  </div>

  2. Modify middlewares/errorHandler.middleware.js to use the newly created error pages with the layout main.hbs

    • Replace

        return response.status(status).send(error.message)

    • with

        return response.status(status).render('errors/' + status, {
      layout: 'main',
      status: status,
      message: error.message
  })

  3. Make sure the router knows to show the 404 error when a page is requested that does not exist in routes/index.js

     ...

 router.get('*', (req, res) => {
     throw {statusCode: 404, message: `"${req.path}" page not found`}
 })

 module.exports = router
Expresserrors