How to troubleshoot and fix CORS issues with Spring Security 4.1 and beyond?

Spring Security CORS Filter: Troubleshooting Common Issues

When integrating Spring Security into an existing project, you may encounter CORS-related errors if headers like 'Access-Control-Allow-Origin' are not set in the response. To resolve this, you can implement a custom filter, such as the MyFilter in your code snippet. However, you also mentioned that this filter was not being applied to your requests.

Since Spring Security 4.1, there is a more straightforward approach to enable CORS support:

Proper CORS Configuration:

<br>@Configuration<br>public class WebConfig extends WebMvcConfigurerAdapter {</p>
<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">@Override
public void addCorsMappings(CorsRegistry registry) {
    registry.addMapping("/**")
            .allowedMethods("HEAD", "GET", "PUT", "POST", "DELETE", "PATCH");
}

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}

Spring Security Configuration:

<br>@Configuration<br>public class SecurityConfig extends WebSecurityConfigurerAdapter {</p>
<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">@Override
protected void configure(HttpSecurity http) throws Exception {
    http.cors();
}

@Bean
public CorsConfigurationSource corsConfigurationSource() {
    // Configure CORS settings here
}

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