1 files changed, 83 insertions, 0 deletions
diff --git a/juick-server-web/src/main/java/com/juick/service/security/HashParamAuthenticationFilter.java b/juick-server-web/src/main/java/com/juick/service/security/HashParamAuthenticationFilter.java
new file mode 100644
index 00000000..86e21d01
--- /dev/null
+++ b/juick-server-web/src/main/java/com/juick/service/security/HashParamAuthenticationFilter.java
@@ -0,0 +1,83 @@
+package com.juick.service.security;
+
+import com.juick.User;
+import com.juick.service.security.entities.JuickUser;
+import com.juick.service.UserService;
+import org.springframework.security.authentication.AnonymousAuthenticationToken;
+import org.springframework.security.authentication.RememberMeAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.web.authentication.RememberMeServices;
+import org.springframework.util.Assert;
+import org.springframework.web.filter.OncePerRequestFilter;
+import org.springframework.web.util.WebUtils;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+/**
+ * Created by aalexeev on 4/5/17.
+ */
+public class HashParamAuthenticationFilter extends OncePerRequestFilter {
+    public static final String PARAM_NAME = "hash";
+
+    private final UserService userService;
+    private final RememberMeServices rememberMeServices;
+
+
+    public HashParamAuthenticationFilter(
+            final UserService userService,
+            final RememberMeServices rememberMeServices) {
+        Assert.notNull(userService, "userService should not be null");
+        Assert.notNull(rememberMeServices, "rememberMeServices should not be null");
+
+        this.userService = userService;
+        this.rememberMeServices = rememberMeServices;
+    }
+
+    @Override
+    protected void doFilterInternal(
+            HttpServletRequest request,
+            HttpServletResponse response,
+            FilterChain filterChain) throws ServletException, IOException {
+
+        String hash = getHashFromRequest(request);
+
+        if (hash != null && authenticationIsRequired()) {
+            User user = userService.getUserByHash(hash);
+
+            if (!user.isAnonymous()) {
+                Authentication authentication = new RememberMeAuthenticationToken(
+                        hash, new JuickUser(user), JuickUser.USER_AUTHORITY);
+
+                SecurityContextHolder.getContext().setAuthentication(authentication);
+
+                rememberMeServices.loginSuccess(request, response, authentication);
+            }
+        }
+
+        filterChain.doFilter(request, response);
+    }
+
+    private boolean authenticationIsRequired() {
+        Authentication existingAuth = SecurityContextHolder.getContext().getAuthentication();
+
+        return existingAuth == null ||
+                !existingAuth.isAuthenticated() ||
+                existingAuth instanceof AnonymousAuthenticationToken;
+    }
+
+    private String getHashFromRequest(HttpServletRequest request) {
+        String paramHash = request.getParameter(PARAM_NAME);
+        Cookie cookieHash = WebUtils.getCookie(request, PARAM_NAME);
+
+        if (paramHash == null && cookieHash != null) {
+            return cookieHash.getValue();
+        }
+        return paramHash;
+    }
+}