In your Angular and Spring Boot project, the videos you mentioned seem to be complementary parts of a complete authentication solution that involves both the frontend (Angular) and the backend (Spring Boot). Here's a breakdown of how they likely work together:
-
Implementing Token and Role Base Authentication Using Spring Boot + JWT + MySQL:
- This video covers setting up authentication and authorization on the server side using Spring Boot.
- It involves creating endpoints for user login and registration.
- JWT (JSON Web Token) is used to issue tokens upon successful authentication.
- These tokens are then used to secure endpoints and manage user roles and permissions.
- MySQL is used as the database to store user information and roles.
-
Angular: Implementing Token and Role Based Authentication Using JWT | AuthGuard and Interceptor:
- This video focuses on the client side, specifically using Angular to handle authentication and authorization.
- It involves using Angular services to log in users and manage JWT tokens.
- AuthGuards are used to protect routes in your Angular application, ensuring only authenticated users can access certain parts of the app.
- Interceptors are used to attach JWT tokens to outgoing HTTP requests, so the server can validate the requests.
-
User Authentication:
- The user logs in through an Angular frontend.
- The Angular application sends the login credentials to the Spring Boot backend.
- The Spring Boot backend verifies the credentials, generates a JWT token, and sends it back to the Angular frontend.
-
Token Management:
- The Angular application stores the JWT token (usually in local storage or a service).
- For subsequent requests to protected endpoints, the Angular application attaches the JWT token to the HTTP headers using an interceptor.
-
Route Protection:
- The Angular application uses AuthGuards to protect certain routes, checking if the user is authenticated (i.e., has a valid JWT token).
- The Spring Boot backend checks the validity of the JWT token for each request and enforces role-based access control.
You should use both authentication implementations as described in the videos. The Spring Boot part handles the backend logic, generating and validating JWT tokens, and managing user roles. The Angular part handles the frontend logic, managing the JWT tokens, protecting routes, and ensuring secure communication with the backend.
By combining both, you achieve a full-stack authentication solution where:
- Spring Boot secures the backend and manages user data.
- Angular secures the frontend and manages client-side authentication state.
The commands ng serve
, npm start
, and npm run start
are commonly used in the context of Angular and Node.js projects, but they serve slightly different purposes depending on how they are set up in your project's configuration files. Here’s a detailed explanation of each:
- Purpose: This command is specific to Angular projects. It compiles the application, starts a development server, watches your files for changes, and automatically reloads the browser when changes are detected.
- Usage:
- Directly run from the command line in an Angular project.
- No additional configuration is needed if you are using Angular CLI.
- Command:
ng serve
- Default Port: 4200 (can be changed using
--port
flag) - Example:
ng serve ng serve --port 4300
- Purpose: This command is a standard script defined in the
scripts
section of thepackage.json
file in any Node.js project. It is a shorthand for running a command without specifying the fullrun
syntax. By default, it runs whatever script is defined as"start"
inpackage.json
. - Usage:
- Can be used in any Node.js project that has a
start
script defined inpackage.json
.
- Can be used in any Node.js project that has a
- Command:
npm start
- Example of
package.json
:To run it:{ "scripts": { "start": "node server.js" } }
npm start
- Purpose: This is similar to
npm start
, but it is explicit about running a script defined in thepackage.json
file. It is useful when you have multiple scripts and you want to run one specifically. - Usage:
- Can be used to run any script defined in the
scripts
section ofpackage.json
. - Explicitly specifies which script to run, which is useful for clarity and consistency.
- Can be used to run any script defined in the
- Command:
npm run start
- Example of
package.json
:To run the{ "scripts": { "start": "node server.js", "test": "jest", "build": "webpack" } }
start
script:npm run start
-
ng serve:
- Directly runs the Angular CLI command.
- Often used for development because it includes live-reloading.
- Does not require a
package.json
script definition if Angular CLI is globally installed.
-
npm start:
- Runs the script defined as
start
inpackage.json
. - If
package.json
defines"start": "ng serve"
, it will effectively runng serve
. - Example
package.json
:{ "scripts": { "start": "ng serve" } }
- Typically used in projects where you want to standardize the start command across different environments or team members.
- Runs the script defined as
-
npm run start:
- Explicitly runs the
start
script defined inpackage.json
. - Useful for clarity, especially in projects with many scripts.
- Equivalent to
npm start
if thestart
script is defined inpackage.json
.
- Explicitly runs the
In an Angular project, you might have a package.json
like this:
{
"name": "my-angular-app",
"version": "0.0.1",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/core": "~11.0.0",
// other dependencies
},
"devDependencies": {
"@angular/cli": "~11.0.0",
// other dev dependencies
}
}
You can use any of these commands to start the Angular development server:
ng serve
npm start
npm run start
All three commands will achieve the same result of starting the Angular development server, but npm start
and npm run start
rely on the script defined in package.json
, while ng serve
directly invokes the Angular CLI command.