node-mongo-url-shortner

Steps involved:

• npm init -y
• npm i express mongoose ejs
• npm i --save-dev nodemon
• create server.js
• start script for dev in "scripts"
• serve root at localhost:5000
• npm run start-dev -> executes: nodemon server.js
• create views directory
• create index.ejs -> create basic html -> add form, table -> run
• add bootstrap cdn -> apply bootstrap to form, table -> run
• create directory models for storing db models
• create short_url.js and create schema for urls collection
• create mongodb connection in server.js -> run check
• npm i shortid creates unique short identifier
• add shortid property in schema
• add app.use for express urlencode
• create POST /shortUrls route for taking in URL requests
• create new object in post request and then redirect -> run
• add find all short urls in serving root and pass as parameter to index file
• use shortUrls obejct to fill table to show urls from server -> run
• create new route for redirecting shortUrl at end of server.js
• find url based on shortUrl, add click, save, redirect if not null -> run
• create error page in views
• when short url does not exist, render error with response
• added app use to send response 204 for favicon request and shifted route log below this
• install dotenv npm i dotenv
• create .env file for storing db credentials
• provide arguments to database call using process.env.VARIABLE_NAME
• issue faced: whenever username used as a env variable, when invoked gave first letter capital of corresponding value. e.g. admin -> Admin
• :: hence using user in this case in environment variables

Begins heroku deployment:

• create heroku account
• install heroku CLI
• goto local project git directory
• login into heroku cli : heroku login
• enter credentials -> login success
• heroku starts server on port 5000! the code has been designed to accept port from external environment
• create heroku project: heroku create app_name : heroku create short-url-abhi : this creates a git project named short-url-abhi assosiated to heroku
• goto heroku dashboard -> app -> settings -> config vars : add .env variables
• push commited project to heroku master branch : git push heroku master : makes the project live at returned url