Spring Boot Auth

Learn how authentication works

Create Account

Minimum 6 characters
✓ Email format valid
✓ Password minimum 6 characters
✓ Passwords match
✓ All fields filled

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✓ Email format valid
✓ Password provided

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Sign Up Flow
📱
Frontend
User Input
→
📨
DTO
UserRequestDTO
→
⚙️
Service
UserService
→
🔒
BCrypt
Hash Password
→
💾
Database
PostgreSQL
Login Flow
📱
Frontend
Credentials
→
🔍
AuthService
Find User
→
✅
Verify
BCrypt.matches()
→
🎫
JWT
Generate Token
→
📱
Frontend
Receive JWT

Dashboard

User Profile

—
—
—

Authentication Status

Authenticated
JWT Token will appear here...
—

Protected API Request

Fetch your user data using JWT authentication

GET /user/{id}
Bearer <JWT Token>

Response

Response will appear here after API integration...

Backend Activity

Real-time visualization of backend processing

Activity will appear here when API calls are made...

API Request Inspector

View detailed request and response information

Last Request

—
—
—

Request Body

{}

Response Body

{}

JWT Token Structure

Understanding JSON Web Tokens

Header
{
  "alg": "HS256",
  "typ": "JWT"
}
·
Payload
{
  "sub": "user-id",
  "iat": 1234567890,
  "exp": 1234567890
}
·
Signature
HMACSHA256(base64UrlEncode(header) + "." +
base64UrlEncode(payload), secret)

JWT data will appear here after you log in via API integration.

Protected Request Flow
📱
Frontend
Send JWT
→
🔐
Filter
JwtAuthenticationFilter
→
✅
Validate
JWT Verification
→
🔒
Security
SecurityContext
→
⚙️
Controller
Handler
→
💾
Database
Query