APi key stuff

src/main/java/stirling/software/SPDF/config/UserBasedRateLimitingFilter.java

@@ -16,6 +16,7 @@ import org.springframework.web.filter.OncePerRequestFilter;
 import io.github.bucket4j.Bandwidth;
 import io.github.bucket4j.Bucket;
 import io.github.bucket4j.Bucket4j;
+import io.github.bucket4j.ConsumptionProbe;
 import io.github.bucket4j.Refill;
 import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
@@ -26,18 +27,22 @@ public class UserBasedRateLimitingFilter extends OncePerRequestFilter {
 
     private final Map<String, Bucket> buckets = new ConcurrentHashMap<>();
 
+    @Autowired
+    private UserDetailsService userDetailsService;
 
     @Override
     protected void doFilterInternal(HttpServletRequest request,
                                     HttpServletResponse response,
                                     FilterChain filterChain) throws ServletException, IOException {
+
     String method = request.getMethod();
+    
     if (!"POST".equalsIgnoreCase(method)) {
+        // If the request is not a POST, just pass it through without rate limiting
         filterChain.doFilter(request, response);
         return;
     }
 
-
     String identifier;
     Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
     
@@ -49,20 +54,25 @@ public class UserBasedRateLimitingFilter extends OncePerRequestFilter {
     }
 
     Bucket userBucket = buckets.computeIfAbsent(identifier, k -> createUserBucket());
+    ConsumptionProbe probe = userBucket.tryConsumeAndReturnRemaining(1);
     
-        if (userBucket.tryConsume(1)) {
+    if (probe.isConsumed()) {
+        response.setHeader("X-Rate-Limit-Remaining", Long.toString(probe.getRemainingTokens()));
         filterChain.doFilter(request, response);
     } else {
+        long waitForRefill = probe.getNanosToWaitForRefill() / 1_000_000_000;
         response.setStatus(HttpStatus.TOO_MANY_REQUESTS.value());
-            response.getWriter().write("Rate limit exceeded.");
+        response.setHeader("X-Rate-Limit-Retry-After-Seconds", String.valueOf(waitForRefill));
+        response.getWriter().write("Rate limit exceeded for POST requests.");
         return;
     }
-    }
-//https://www.baeldung.com/spring-bucket4j
-    private Bucket createUserBucket() {
-        Refill refill = Refill.of(3, Duration.ofDays(1));
-        Bandwidth limit = Bandwidth.classic(3, refill).withInitialTokens(3);
-        return Bucket4j.builder().addLimit(limit).build();
-    }
 }
 
+private Bucket createUserBucket() {
+    Bandwidth limit = Bandwidth.classic(1000, Refill.intervally(1000, Duration.ofDays(1)));
+    return Bucket.builder().addLimit(limit).build();
+}
+
+}
+
+

src/main/java/stirling/software/SPDF/config/security/InitialSetup.java

@@ -18,9 +18,9 @@ public class InitialSetup {
             String initialUsername = System.getenv("INITIAL_USERNAME");
             String initialPassword = System.getenv("INITIAL_PASSWORD");
             if(initialUsername != null && initialPassword != null) {
-                userService.saveUser(initialUsername, initialPassword, Role.ADMIN);
+                userService.saveUser(initialUsername, initialPassword, Role.ADMIN.getRoleId());
             } else {
-            	userService.saveUser("admin", "password", Role.ADMIN);
+            	userService.saveUser("admin", "password", Role.ADMIN.getRoleId());
             }
         }
     }

src/main/java/stirling/software/SPDF/config/security/UserService.java

@@ -1,10 +1,20 @@
 package stirling.software.SPDF.config.security;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
 
 import java.util.Map;
 import java.util.Optional;
+import java.util.Set;
+import java.util.UUID;
+import java.util.stream.Collectors;
+import java.util.Collection;
 import java.util.HashMap;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
 
@@ -21,6 +31,68 @@ public class UserService {
     @Autowired
     private PasswordEncoder passwordEncoder;
 
+    public Authentication getAuthentication(String apiKey) {
+        User user = getUserByApiKey(apiKey);
+        if (user == null) {
+            throw new UsernameNotFoundException("API key is not valid");
+        }
+        
+        // Convert the user into an Authentication object
+        return new UsernamePasswordAuthenticationToken(
+            user,                       // principal (typically the user)
+            null,                       // credentials (we don't expose the password or API key here)
+            getAuthorities(user)        // user's authorities (roles/permissions)
+        );
+    }
+    
+    private Collection<? extends GrantedAuthority> getAuthorities(User user) {
+        // Convert each Authority object into a SimpleGrantedAuthority object.
+    	return user.getAuthorities().stream()
+    		    .map((Authority authority) -> new SimpleGrantedAuthority(authority.getAuthority()))
+    		    .collect(Collectors.toList());
+
+
+    }
+    
+    private String generateApiKey() {
+        String apiKey;
+        do {
+            apiKey = UUID.randomUUID().toString();
+        } while (userRepository.findByApiKey(apiKey) != null); // Ensure uniqueness
+        return apiKey;
+    }
+
+    public User addApiKeyToUser(String username) {
+        User user = userRepository.findByUsername(username)
+            .orElseThrow(() -> new UsernameNotFoundException("User not found"));
+        
+        user.setApiKey(generateApiKey());
+        return userRepository.save(user);
+    }
+
+    public User refreshApiKeyForUser(String username) {
+        return addApiKeyToUser(username); // reuse the add API key method for refreshing
+    }
+
+    public String getApiKeyForUser(String username) {
+        User user = userRepository.findByUsername(username)
+            .orElseThrow(() -> new UsernameNotFoundException("User not found"));
+        return user.getApiKey();
+    }
+
+    public boolean isValidApiKey(String apiKey) {
+        return userRepository.findByApiKey(apiKey) != null;
+    }
+
+    public User getUserByApiKey(String apiKey) {
+        return userRepository.findByApiKey(apiKey);
+    }
+
+    public boolean validateApiKeyForUser(String username, String apiKey) {
+        Optional<User> userOpt = userRepository.findByUsername(username);
+        return userOpt.isPresent() && userOpt.get().getApiKey().equals(apiKey);
+    }
+    
     public void saveUser(String username, String password) {
         User user = new User();
         user.setUsername(username);

src/main/java/stirling/software/SPDF/model/Role.java

@@ -1,10 +1,42 @@
 package stirling.software.SPDF.model;
-public final class Role {
+public enum Role {
 	
-	    public static final String ADMIN = "ROLE_ADMIN";
-	    public static final String USER = "ROLE_USER";
-	    public static final String LIMITED_API_USER = "ROLE_LIMITED_API_USER";
-	    public static final String WEB_ONLY_USER = "ROLE_WEB_ONLY_USER";
+	// Unlimited access
+    ADMIN("ROLE_ADMIN", Integer.MAX_VALUE, Integer.MAX_VALUE),
+
+    // Unlimited access
+    USER("ROLE_USER", Integer.MAX_VALUE, Integer.MAX_VALUE),
+
+    // 40 API calls Per Day, 40 web calls
+    LIMITED_API_USER("ROLE_LIMITED_API_USER", 40, 40),
+
+    // 20 API calls Per Day, 20 web calls
+    EXTRA_LIMITED_API_USER("ROLE_EXTRA_LIMITED_API_USER", 20, 20),
+
+    // 0 API calls per day and 20 web calls
+    WEB_ONLY_USER("ROLE_WEB_ONLY_USER", 0, 20);
+
+    private final String roleId;
+    private final int apiCallsPerDay;
+    private final int webCallsPerDay;
+
+    Role(String roleId, int apiCallsPerDay, int webCallsPerDay) {
+        this.roleId = roleId;
+        this.apiCallsPerDay = apiCallsPerDay;
+        this.webCallsPerDay = webCallsPerDay;
+    }
+
+    public String getRoleId() {
+        return roleId;
+    }
+
+    public int getApiCallsPerDay() {
+        return apiCallsPerDay;
+    }
+
+    public int getWebCallsPerDay() {
+        return webCallsPerDay;
+    }
 	    
 	    
 	

src/main/java/stirling/software/SPDF/model/User.java

@@ -28,6 +28,9 @@ public class User {
     @Column(name = "password")
     private String password;
 
+    @Column(name = "apiKey")
+    private String apiKey;
+    
     @Column(name = "enabled")
     private boolean enabled;
 
@@ -42,6 +45,14 @@ public class User {
 
     
     
+	public String getApiKey() {
+		return apiKey;
+	}
+
+	public void setApiKey(String apiKey) {
+		this.apiKey = apiKey;
+	}
+
 	public Map<String, String> getSettings() {
 		return settings;
 	}

src/main/java/stirling/software/SPDF/repository/UserRepository.java

@@ -8,5 +8,6 @@ import stirling.software.SPDF.model.User;
 
 public interface UserRepository extends JpaRepository<User, String> {
     Optional<User> findByUsername(String username);
+    User findByApiKey(String apiKey);
 }