OAuth2 Login Integration
spring-boot-starter-oauth2-client dependency se, "LOGIN WITH GOOGLE" ya "LOGIN WITH GITHUB" jaisi FUNCTIONALITY, MINIMAL CONFIGURATION mein SETUP ho sakti hai. Spring Boot, POORA OAUTH2 FLOW (USER ko PROVIDER par REDIRECT karna, CALLBACK HANDLE karna, TOKEN EXCHANGE karna) AUTOMATICALLY MANAGE karta hai.
YAHA EK IMPORTANT DISTINCTION SAMAJHNA ZAROORI hai — OAuth2 CLIENT (spring-boot-starter-oauth2-client) VS OAuth2 RESOURCE SERVER (spring-boot-starter-oauth2-resource-server). CLIENT, USER ko LOGIN PROVIDER par REDIRECT karta hai. RESOURCE SERVER, INCOMING REQUESTS mein AAYE TOKENS ko VALIDATE karta hai — EK TYPICAL API BACKEND, RESOURCE SERVER hoti hai.
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-oauth2-client</artifactId>
</dependency>
# application.properties:
spring.security.oauth2.client.registration.google.client-id=YOUR_CLIENT_ID
spring.security.oauth2.client.registration.google.client-secret=YOUR_CLIENT_SECRET
spring.security.oauth2.client.registration.google.scope=email,profile
# Bas ITNA hi CONFIGURATION kaafi hai —
# "/oauth2/authorization/google" endpoint AUTOMATICALLY WORK karta hai,
# poora REDIRECT + CALLBACK + TOKEN EXCHANGE flow HANDLE hota hai- OAuth2 Client = user ko Google/GitHub par REDIRECT karke, login FLOW manage karta hai
- OAuth2 Resource Server = INCOMING tokens VALIDATE karta hai (typical API backend)
- Minimal config se, POORA redirect+callback+token-exchange flow AUTOMATIC hai
spring-boot-starter-oauth2-client se, "LOGIN WITH GOOGLE/GITHUB" jaisi FUNCTIONALITY, EK FEW LINES CONFIGURATION mein SETUP ho sakti hai — Spring Boot, OAUTH2 FLOW (redirect, callback, token exchange) SAARA AUTOMATICALLY HANDLE karta hai.
# application.properties:
spring.security.oauth2.client.registration.google.client-id=YOUR_CLIENT_ID
spring.security.oauth2.client.registration.google.client-secret=YOUR_CLIENT_SECRET
spring.security.oauth2.client.registration.google.scope=email,profile
# Bas itna kaafi hai — "/oauth2/authorization/google" endpoint AUTOMATICALLY WORK karta haiOAuth2 CLIENT (starter-oauth2-client) — APPLICATION jo USER ko GOOGLE/GITHUB par REDIRECT karti hai LOGIN ke liye. OAuth2 RESOURCE SERVER (starter-oauth2-resource-server) — APPLICATION jo INCOMING TOKENS (jaise JWT) VALIDATE karti hai, SELF DOESN'T REDIRECT anywhere. EK API BACKEND typically RESOURCE SERVER hoti hai.
- OAuth2 Client = user ko LOGIN PROVIDER (Google) par REDIRECT karta hai
- OAuth2 Resource Server = INCOMING tokens (JWT) VALIDATE karta hai, API endpoints PROTECT karta hai