1 files changed, 66 insertions, 0 deletions
diff --git a/juick-server/src/main/java/com/juick/server/security/HashParamAuthenticationFilter.java b/juick-server/src/main/java/com/juick/server/security/HashParamAuthenticationFilter.java
new file mode 100644
index 00000000..df1ae38c
--- /dev/null
+++ b/juick-server/src/main/java/com/juick/server/security/HashParamAuthenticationFilter.java
@@ -0,0 +1,66 @@
+package com.juick.server.security;
+
+import com.juick.User;
+import com.juick.server.security.entities.JuickUser;
+import com.juick.service.UserService;
+import org.springframework.security.authentication.AnonymousAuthenticationToken;
+import org.springframework.security.authentication.RememberMeAuthenticationToken;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+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;
+
+
+    public HashParamAuthenticationFilter(UserService userService) {
+        this.userService = userService;
+    }
+
+    @Override
+    protected void doFilterInternal(
+            HttpServletRequest request,
+            HttpServletResponse response,
+            FilterChain filterChain) throws ServletException, IOException {
+
+        String hash = request.getHeader(PARAM_NAME);
+
+        if (hash == null)
+            hash = request.getParameter(PARAM_NAME);
+
+        if (hash != null && authenticationIsRequired()) {
+            User user = userService.getUserByHash(hash);
+
+            if (!user.isAnonymous())
+                SecurityContextHolder.getContext().setAuthentication(
+                        new RememberMeAuthenticationToken(hash, new JuickUser(user), JuickUser.USER_AUTHORITY));
+        }
+
+        filterChain.doFilter(request, response);
+    }
+
+    private boolean authenticationIsRequired() {
+        Authentication existingAuth = SecurityContextHolder.getContext().getAuthentication();
+
+        if (existingAuth == null || !existingAuth.isAuthenticated())
+            return true;
+
+        if (existingAuth instanceof AnonymousAuthenticationToken)
+            return true;
+
+        return false;
+    }
+}