README

jwt-rails project developed for helping Authenticate your rails rest-api project
you can fast develop project with jwt-rails
I used reference following websites
https://guides.rubyonrails.org/generators.html#creating-generators-with-generators
https://medium.com/binar-academy/rails-api-jwt-authentication-a04503ea3248

• rails api only project rails new my_api --api https://guides.rubyonrails.org/api_app.html
• You don't have User Model, It will generate User Model
• 'rails', '~> 3.2.0'

1. Add gem in Gemfile

   gem 'jwt-rails', '~> 0.0.1'

   OR

   gem 'jwt-rails', :git => "git://github.com/x1wins/jwt-rails.git"

2. Generate JWT class, User Model, Endpoint

   rails generate jwt_rails
   rake db:migrate

3. Endpoint

   1. Create User

        curl -d '{"user": {"name":"ChangWoo", "username":"helloworld", "email":"x1wins@changwoo.org", "password":"hello1234", "password_confirmation":"hello1234"}}' -H "Content-Type: application/json" -X POST -i http://localhost:3000/users

   2. Login

        curl -d '{"email":"x1wins@changwoo.org", "password":"hello1234"}' -H "Content-Type: application/json" -X POST http://localhost:3000/auth/login | jq
        {
          "token": "eyJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoxLCJleHAiOjE1NzcyMjkwOTl9.an-cp7gWzEuufwvWPo3SFXzpxL_G1wvNpm6g7W_gdQU",
          "exp": "12-24-2019 15:11",
          "username": "helloworld"
        }

   3. Token Usage
      If you have Post scaffold. you can use following curl command
      1. Fail Case - Wrong token

         curl -X GET -i http://localhost:3000/posts
         HTTP/1.1 401 Unauthorized

      2. Success Case

         curl -X GET -i http://localhost:3000/posts -H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoxLCJleHAiOjE1NzcyMjkwOTl9.an-cp7gWzEuufwvWPo3SFXzpxL_G1wvNpm6g7W_gdQU"
         HTTP/1.1 200 OK

4. Scaffold Example

   1. Use user:references in scaffold code

        rails g scaffold post body:string user:references published:boolean

   2. model serierize
      https://itnext.io/a-quickstart-guide-to-using-serializer-with-your-ruby-on-rails-api-d5052dea52c5
      
      1. Gemfile

            gem 'active_model_serializers'

      2. Command

            rails g serializer user name:string username:string email:string
            rails g serializer post body:string user:references published:boolean

   3. Authenticate
      Insert before_action :authorize_request code into Controller

        class PostsController < ApplicationController
          before_action :authorize_request
          
          //...other code
          
        end

   4. Authorize
      https://stackoverflow.com/questions/17594939/check-if-current-user-is-the-owner-of-a-resource-and-allow-edit-delete-actions/57279448#57279448
      
      1. Insert is_owner_object code into Controller
         
      2. Append merge(user_id: @current_user.id) to post_params method

           class PostsController < ApplicationController
             before_action :authorize_request
             before_action :set_post, only: [:show, :update, :destroy]
             before_action only: [:edit, :update, :destroy] do
               is_owner_object @post ##your object
             end
         
             //...other code
             
             def post_params
                 params.require(:post).permit(:body).merge(user_id: @current_user.id)
             end
           end

   5. Test with CURL
      1. Create

            curl  -X POST -i http://localhost:3000/posts -d '{"post": {"body":"sample body text sample"}}' -H "Content-Type: application/json" -H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoxLCJleHAiOjE1NzcyMzY1NTJ9.0pRv-wnQPdQd1WoaA5mSPDWagfGCk---kwO7pSmKkUg"

      2. Index

            curl -X GET -i http://localhost:3000/posts -H "Content-Type: application/json" -H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoxLCJleHAiOjE1NzcyMzY1NTJ9.0pRv-wnQPdQd1WoaA5mSPDWagfGCk---kwO7pSmKkUg"

How to build gem

gem build jwt-rails.gemspec
gem install jwt-rails-0.0.1.gem