From a9a2c587a4de11ce04aaae7a0c1a5dab1430794a Mon Sep 17 00:00:00 2001
From: Alexander Alexeev
Date: Wed, 5 Apr 2017 17:36:38 +0700
Subject: login by hash, remember-me

---
 .../security/HashParamAuthenticationFilter.java    | 66 ++++++++++++++++++++++
 .../java/com/juick/service/UserServiceImpl.java    |  5 +-
 2 files changed, 69 insertions(+), 2 deletions(-)
 create mode 100644 juick-server/src/main/java/com/juick/server/security/HashParamAuthenticationFilter.java

(limited to 'juick-server/src/main/java/com/juick')

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;
+    }
+}
diff --git a/juick-server/src/main/java/com/juick/service/UserServiceImpl.java b/juick-server/src/main/java/com/juick/service/UserServiceImpl.java
index 81a1fea7..1b33a6d3 100644
--- a/juick-server/src/main/java/com/juick/service/UserServiceImpl.java
+++ b/juick-server/src/main/java/com/juick/service/UserServiceImpl.java
@@ -4,6 +4,7 @@ import com.juick.User;
 import com.juick.server.helpers.Auth;
 import com.juick.server.helpers.EmailOpts;
 import com.juick.server.helpers.UserInfo;
+import com.juick.server.security.entities.AnonymousUser;
 import com.juick.util.UserUtils;
 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.lang3.StringUtils;
@@ -126,7 +127,7 @@ public class UserServiceImpl extends BaseJdbcService implements UserService {
                 return list.get(0);
         }
         // TODO: @NonNullable ?
-        return new User();
+        return AnonymousUser.INSTANCE;
     }
 
     @Override
@@ -284,7 +285,7 @@ public class UserServiceImpl extends BaseJdbcService implements UserService {
                 return user;
             }
         }
-        return new User();
+        return AnonymousUser.INSTANCE;
     }
 
     @Transactional
-- 
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