attempt fix cors

Author: alankoo1995

backend/src/main/java/comp9323/group12/backend/config/SecurityConfig.java

@@ -4,12 +4,19 @@
 import comp9323.group12.backend.component.auth.RestAuthenticationFailureHandler;
 import comp9323.group12.backend.component.auth.RestAuthenticationSuccessHandler;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
 import org.springframework.http.HttpMethod;
+import org.springframework.security.config.Customizer;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 import org.springframework.security.web.authentication.logout.LogoutSuccessHandler;
 import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.cors.CorsConfiguration;
+import org.springframework.web.cors.CorsConfigurationSource;
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
+
+import java.util.Arrays;
 
 
 @EnableWebSecurity
@@ -42,7 +49,18 @@ protected void configure(HttpSecurity http) throws Exception {
             .authorizeRequests()
               .antMatchers( "/api/unauthorized", "/api/signup", "/api/login").permitAll()
               .antMatchers(HttpMethod.OPTIONS, "/**").permitAll()
-            .anyRequest().authenticated();
+            .anyRequest().authenticated()
+            .and().cors(Customizer.withDefaults());
+  }
+
+  @Bean
+  CorsConfigurationSource corsConfigurationSource() {
+    CorsConfiguration configuration = new CorsConfiguration();
+    configuration.setAllowedOrigins(Arrays.asList("*"));
+    configuration.setAllowedMethods(Arrays.asList("GET","POST", "OPTIONS", "PUT", "DELETE"));
+    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
+    source.registerCorsConfiguration("/**", configuration);
+    return source;
   }
 }