Create a File expressnode and CD to the expressnode file
- mkdir expressnode
- cd expressnode
To build a RESTful API, we will use:
Node.js Go to the following website and download Node
https://nodejs.org/en/download/
- Inside the expressnode file we need to install other tools in order to run our Node.js API
Install Node.js Install nvm – Node Version Manager Install npm – Node Package Manager
In the terminal you can verify if the npm and node are working by running the following commands:
npm --version node --version
Initializing the project with the command: npm init
Running "npm init" some questions will pop up as follows: name the project, licenses, and version. Hit Enter to all questions.
command: npm install express
I used visual studio to edit and develop this API you can get it from this site (https://code.visualstudio.com/download)
Create a file index.js inside the folder expressnode. (see index file , line 1, 2 and 3)
const express = require('express'); const app = express();
I added an array inside the index.js with get method we will be able to get each user with valid ID. I
const members = [ {id:1, name: 'Hello Mark'}, {id:2, name: 'Hello Jhon'}, {id:3, name: 'Hello Jessica'}, ];
// if we query the ID : 1 , it will be displayed { id:1, name: 'Hello Mark'} .If you query ID:4 it will return 'Hello Stranger' or error. The full address will be http://localhost:4000/api/courses/1
app.get ('/api/members/:id', (req,res) => { const member = members.find(c => c.id === parseInt(req.params.id)); if(!member) return res.status(404).send('Hello Stranger'); res.send(member); });
const port = process.env.PORT || 4000;
app.listen(port, () => console.log(listening on port ${port}...));
This method will allow to create a new member
app.put('/api/members/:id', (req,res) => { const member = members.find(c => c.id === parseInt(req.params.id)); if(!member) return res.status(404).send('Hello Stranger');
const {error} = validateMember(req.body);
if (error) return res.status(400).send (error.details[0].message);
member.name = req.body.name; res.send(member); });
POSTMAN was used to test the GET and POST method : https://www.getpostman.com
I run the following command to start: nodemon index.js
[nodemon] 2.0.2
[nodemon] to restart at any time, enter rs
[nodemon] watching dir(s): .
[nodemon] watching extensions: js,mjs,json
[nodemon] starting node index.js
listening on port 4000...
By click on SEND GET this address http://localhost:4000/api/members
I will display all members in our array.
[ { "id": 1, "name": "Hello Mark" }, { "id": 2, "name": "Hello Jhon" }, { "id": 3, "name": " Hello Jessica" } ]
By click on SEND GET this address http://localhost:4000/api/members/1
I will display the member with ID : 1
{ "id": 1, "name": "Hello Mark" }
By click on SEND GET this address http://localhost:4000/api/members/5 http://localhost:4000/api/members/5
The message will be displayed : "Hello Stranger" because ID #5 doesn't exit in our array
install docker from this website : https://docs.docker.com/docker-for-mac/install/
The I Created a "DockerFile" and add the following information.
-- DockerFile-- ROM node:8
WORKDIR /src
COPY package*.json ./
RUN npm install
RUN npm install -g nodemon
COPY . .
EXPOSE 4000
CMD ["node", "/src/index.js" ]
Create another file docker-compose.yml and insert the following info ------ docker-compose.yml. ------ version: '3' services: app: container_name: expressnode restart: always build: . ports: - "4000:4000"
Create another fil .gitignore ---- .gitignore --- node_modules npm-debug.log
run the following command to start docker : docker-compose up
To deploy your application across the swarm, use docker stack deploy.
Starting expressnode ... done Attaching to expressnode expressnode | listening on port 4000...
http://localhost:4000/api/members
I created a new repository in order to store this information niodeexpresstest
https://github.com/jaimehernan95/niodeexpresstest.git
Then I uploaded all the files to my new repo
Command to use upload the file and projects on github.
cd/your project directory
- git init
- git add . or git add ['filename']
- git commit -m "Added files to Docker"
- git remote add origin https://github.com/jaimehernan95/niodeexpresstest.git
- git pull origin master
- git push origin master