From 40bc4a07922e60d5ccad46a5ab8eb0346409dad8 Mon Sep 17 00:00:00 2001
From: tactonbishop <tactonbishop@gmail.com>
Date: Thu, 4 Aug 2022 08:30:04 +0100
Subject: [PATCH] Last Sync: 2022-08-04 08:30:04

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 .../NodeJS/Modules/Third_party/Helmet.md      |  1 +
 .../NodeJS/REST_APIs/01_GET.md                |  0
 .../NodeJS/REST_APIs/0_Introduction.md        | 52 +++++++++++++++++++
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 create mode 100644 Programming_Languages/NodeJS/Modules/Third_party/Helmet.md
 create mode 100644 Programming_Languages/NodeJS/REST_APIs/01_GET.md
 create mode 100644 Programming_Languages/NodeJS/REST_APIs/0_Introduction.md

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+// TODO Add details of Helmet and examples of use.
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+---
+tags:
+  - Programming_Languages
+  - backend
+  - node-js
+  - express
+  - REST
+  - apis
+---
+
+# Creating a REST API with Node and Express: Introduction
+
+We are going to use Express to create a [RESTful API](/Databases/RESTful_APIs.md) in Node.js. 
+
+## Request types
+
+Express provides us with methods corresponding to each of the [HTTP request types](/Databases/HTTP_request_types.md):
+
+* `app.get()`
+* `app.post()`
+* `app.put()`
+* `app.delete()`
+
+## Creating an Express instance
+
+````js
+const express = require('express')
+const app = express()
+````
+
+## Our data set
+
+> Typically when you create a RESTful API you are going to be returning data from a database. For simplicity we are just going simulate this with a simple data array so that we can focus on the Express syntax rather than database handling.
+
+We will mainly work with the following array of objects:
+
+````js
+const courses = [
+  {
+    id: 1,
+    name: "First course",
+  },
+  {
+    id: 2,
+    name: "Second course",
+  },
+  {
+    id: 3,
+    name: "Third course",
+  },
+];
+````
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