No 'Access-Control-Allow-Origin' header is present on the requested resource.On VPN

Question

Dears ,

I got a strange issue on My Spring Boot Rest Services & angular JS, When VPN on, API throw 'No Access-Control-Allow-Origin' header is present on the requested resource' But Without VPN its working correctly .

@Configuration

public class CorsConfig {

@Bean
public WebMvcConfigurer corsConfigurer() {
    return new WebMvcConfigurerAdapter() {
        @Override
        public void addCorsMappings(CorsRegistry registry) {
            registry.addMapping("/**");
        }
    };
}

}

look at this https://stackoverflow.com/questions/51802102/spring-boot-security-no-access-control-allow-origin-header-is-present-on-the-r/51802163 — GolamMazid Sajib, Aug 11 '18 at 18:27
@sajib I have already added that bean and Its working perfectly in normal case,Only when VPN is On Its Not working. — Pritam Kumar, Aug 12 '18 at 06:16

score -1 · Answer 1 · answered Aug 12 '18 at 11:44

The problem is that browser is sending the option request to server to get the server permission for the request in the form response headers

so, you need to set the following headers in the response as follows

response.setHeader("Access-Control-Allow-Origin", requestOrigin);

response.setHeader("Access-Control-Allow-Methods", JWTConstants.ACCESS_CONTROL_ALLOWED_METHODS);

response.setHeader("Access-Control-Allow-Headers", JWTConstants.ACCESS_CONTROL_ALLOWED_HEADERS);

or you can simply use * in place of request origin so that it will allow any request.

for more info about the topic plz refer

https://www.owasp.org/index.php/Test_Cross_Origin_Resource_Sharing_(OTG-CLIENT-007)

hope this helps you

I have Used Spring FIlter So where I have to Implement above code you mention @aditya — Pritam Kumar, Aug 14 '18 at 10:02
This code will be implemented in the spring filter itself when the browser will make the option request you need to set those headers — aditya gupta, Aug 14 '18 at 18:57

No 'Access-Control-Allow-Origin' header is present on the requested resource.On VPN

1 Answers1