Скачать или смотреть 🤖Spring Security Secrets !! Read description till End !

🔐 Spring Security in 5 Simple Steps 🚦✨

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🛡️ 1️⃣ Authentication Entry 🚪🔑👤

🔹 Goal: Verify who the user is 🕵️‍♂️
🔹 Tech Stack: Spring Security 🔐 | AuthenticationManager ⚙️ | UsernamePasswordAuthenticationFilter 📝 | PasswordEncoder (BCrypt) 🔑
🔹 Real-Time Use Case: A user logs into a banking app 🏦📱 with username/password 👨‍💻 → credentials are validated securely 🔒✅

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🛡️ 2️⃣ User Data Loading 📂👥🗄️

🔹 Goal: Fetch user details & roles (identity + permissions) 🎭
🔹 Tech Stack: UserDetailsService 👤 | Database 🗄️ | LDAP 📡
🔹 Real-Time Use Case: An e-commerce app 🛒💳 retrieves roles like ROLE_USER 👥 or ROLE_ADMIN 👑 before allowing checkout 🛍️

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🛡️ 3️⃣ Security Context Storage 🗝️📦🧵

🔹 Goal: Store authentication info for current session ⏳
🔹 Tech Stack: SecurityContextHolder 🧰 | ThreadLocal 🧵 | Session Management 🖥️
🔹 Real-Time Use Case: Once a user logs into a corporate portal 🏢💼 → identity is kept for all subsequent actions without re-login 🔄

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🛡️ 4️⃣ Authorization Decision ⚖️🚦🔍

🔹 Goal: Decide what the user can do ✅❌
🔹 Tech Stack: AccessDecisionManager ⚙️ | @PreAuthorize 🏷️ | @Secured 🛑 | FilterSecurityInterceptor 🚦
🔹 Real-Time Use Case: In a hospital system 🏥 → a doctor 👨‍⚕️ can view patient records 📄, but only an admin 👑 can delete them 🗑️

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🛡️ 5️⃣ Access Granted or Denied ✅❌🚷

🔹 Goal: Allow or block the request 🚧
🔹 Tech Stack: Exception Handling ⚡ | AccessDeniedHandler 🚫 | Spring Filters 🔄
🔹 Real-Time Use Case: A guest 👤 tries to access /admin/dashboard 🔒 → System throws 403 Forbidden 🚷❌

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💭 Which step do you find the trickiest — 1️⃣ Authentication or 4️⃣ Authorization?

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