Spring boot app return Access to XMLHttpRequest at "myURL" has been blocked by CORS policy - spring-boot

Question

i'm stuck with this issue: i use a spring boot app in backend and angular app for the front, the issue is when i call a specific rest url in the backend that uses a jar dependency that i have added to the backend as maven system scope dependency i get a cors error. All other backend urls are working fine
here is how i included the jar dependency for the backend:
<dependency>
<groupId>com.ex</groupId>
<artifactId>lib</artifactId>
<version>1.0</version>
<scope>system</scope>
<systemPath>${project.basedir}/src/main/resources/Utils.jar</systemPath>
</dependency>
note also that i'm using a Zuul dispatcher between the front and the backend
and that i did this config in the backend
#Component
public class CorsFilter extends OncePerRequestFilter {
#Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "authorization, content-type, xsrf-token, Content-Range, Content-Disposition, Content-Description, GAuth");
response.addHeader("Access-Control-Expose-Headers", "xsrf-token");
if ("OPTIONS".equals(request.getMethod())) {
response.setStatus(HttpServletResponse.SC_OK);
} else {
filterChain.doFilter(request, response);
}
}
}
any help will be highly appreciated, thanks

Answer 1

Firstly, you need add #CrossOrigin annotation in your controller.
Than here is correct configuration from documentation:
#Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurer() {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedOrigins("*")
.allowedMethods("*")
.allowedHeaders("*");
}
};
}
You can configure it your own way.
Secondly, if you are using SpringSecurity you need add .cors() to your configuration.
Example:
#Override
protected void configure(HttpSecurity http) throws Exception {
http
.cors().and()
.csrf().disable()
.authorizeRequests()
.anyRequest().permitAll()
.and().httpBasic();
}