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Sudipto Ghosh 29823fe495 Expanded guides for some APIs and Microservices challenges and fixed links to the source files (#36131)
* Expanded the solution for the 'Get Route Parameter Input from the Client' challenge

* Expanded the guide for the 'Use body-parser to Parse POST Requests' challenge

* Rewritten guide for the 'Serve JSON on a Specific Route' challenge and fixed source link

* Expanded the guide for the 'Serve Static Assets' challenge

* Expanded solution to the 'Get Query Parameter Input from the Client' challenge and fixed links to source file

* Added solution to the 'Chain Middleware to Create a Time Server' challenge and fixed link to source file

* Rewrite the 'Start a Working Express Server' challenge

* Expanded the guide for 'Expand Your Project with External Packages from npm'

* Added reference to semantic versioning in 'Add a Version to Your package.json'

* fix/remove-links+fix-solutions

* fix/remove-more-links
2019-07-01 20:35:15 -05:00

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Use body-parser to Parse POST Requests

Use body-parser to Parse POST Requests

The body-parser should already be added to your project if you used the provided boilerplate, but if not it should be there as:

"dependencies": {
    "body-parser": "^1.19.0",
    ...
    "express": "^4.17.1"
}

You can run npm install body-parser to add it as a dependency to your project instead of manually adding it to the package.json file.

This guide assumes you have imported the body-parser module into your file as bodyParser.

In order to import the same, you just need to add the following line at the top of your file:

var bodyParser = require('body-parser');

All you need to do for this challenge is pass the middleware to app.use(). Make sure it comes before the paths it needs to be used on. Remember that body-parser returns with bodyParser.urlencoded({extended: false}). Use the following as a template:

app.use(bodyParser.urlencoded({ extended: false }));

In order to parse JSON data sent in the POST request, use bodyParser.json() as the middleware as shown below:

app.use(bodyParser.json());

The data received in the request is available in the req.body object.

Do not forget that all these statements need to go above any routes that might have been defined.