Change authentication filter to accept json

src/main/java/com/example/plantsforyou/filter/CustomAuthenticationFilter.java

@@ -3,7 +3,9 @@ package com.example.plantsforyou.filter;
 import com.auth0.jwt.JWT;
 import com.auth0.jwt.algorithms.Algorithm;
 import com.example.plantsforyou.appuser.AppUser;
+import com.example.plantsforyou.appuser.LoginCredentials;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.NoArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.security.authentication.AuthenticationManager;
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
@@ -16,6 +18,7 @@ import javax.servlet.FilterChain;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import java.io.BufferedReader;
 import java.io.IOException;
 import java.util.Date;
 import java.util.HashMap;
@@ -27,6 +30,7 @@ import static org.springframework.http.MediaType.APPLICATION_JSON_VALUE;
 @Slf4j
 public class CustomAuthenticationFilter extends UsernamePasswordAuthenticationFilter {
     private final AuthenticationManager authenticationManager;
+    private final ObjectMapper objectMapper = new ObjectMapper();
 
     public CustomAuthenticationFilter(AuthenticationManager authenticationManager){
         this.authenticationManager = authenticationManager;
@@ -34,12 +38,26 @@ public class CustomAuthenticationFilter extends UsernamePasswordAuthenticationFi
 
     @Override
     public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
-        String email = request.getParameter("username");
-        String password = request.getParameter("password");
-        log.info("Email is: {}", email);
-        log.info("Password is: {}", password);
-        UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(email, password);
-        return authenticationManager.authenticate(authenticationToken);
+
+        try {
+            BufferedReader reader = request.getReader();
+            StringBuilder stringBuilder = new StringBuilder();
+            String line;
+            while ((line = reader.readLine()) != null) {
+                stringBuilder.append(line);
+            }
+            LoginCredentials credentials = objectMapper.readValue(stringBuilder.toString(), LoginCredentials.class);
+
+            String email = credentials.getUsername();
+            String password = credentials.getPassword();
+            log.info("Email is: {}", email);
+            log.info("Password is: {}", password);
+            UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(email, password);
+            return authenticationManager.authenticate(authenticationToken);
+        }
+        catch(IOException e){
+            throw new IllegalArgumentException(e.getMessage());
+        }
     }
 
     @Override