Accepting data: Handling JSON Data

Managing incoming JSON data requires parsing it from the received POST request. Using an npm package like body-parser is the easiest solution. Install it with the npm install body-parser command or directly in your app dependencies.

  "dependencies": {
...
"body-parser": "^1.17.2"
  },

Then, add the following code towards the beginning of your server main file.

  // Load the body-parser package as a module
  const bodyParser = require("body-parser");

  // Access the JSON parsing service
  const jsonParser = bodyParser.json();

The following code handle POST requests to the "/api/cars" route. JSON data is parsed by jsonParser and defined as the request body.

  // Handle submission of a JSON car array
  app.post("/api/cars", jsonParser, (request, response) => {
const cars = request.body;
response.send(`You sent me a list of cars: ${JSON.stringify(cars)}`);
  });