Custom Check for RequestHeader Spring Download

Question

I currently have this Request Mapper, where I am checking on Request Param using REGEX.

@RequestMapping(value = "/example/{id}", method = GET)
 public Response getExample(
         @PathVariable("id") String id,
         @RequestParam(value = "myParam", required = true) @Valid @Pattern(regexp = MY_REGEX) String myParamRequest,
         @RequestParam(value = "callback", required = false) String callback,
         @RequestHeader(value = "X-API-Key", required = true) String apiKeyHeader) {

     // Stuff here...
 }

So, I can check with the template:

@RequestHeader(value = "X-API-Key", required = true) @Valid @Pattern(regexp = SEGMENTS_REGEX) String apiKeyHeader

But I would like to do some random check of the ie header attribute

if (!API_KEY_LIST.contains(apiKeyHeader)) {
    throw Exception();
}

Answer 1

The best way to do this IMO is to create a custom HandlerMethodArgumentResolverone that will look something like this using a custom annotation @Segment:

public class SegmentHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver {

    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        return parameter.getParameterType().equals(String.class)
            && parameter.getParameterAnnotation(Segment.class);
    }

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
        String apiKey = webRequest.getHeader("X-API-Key");
        if (apiKey != null) {
            if (!API_KEY_LIST.contains(apiKey)) {
                throw new InvalidApiKeyException();
            }
            return apiKey;
        } else {
            return WebArgumentResolver.UNRESOLVED;
        }
    }
}

Then your controller signature looks like this:

@RequestMapping(value = "/example/{id}", method = GET)
 public Response getExample(
         @PathVariable("id") String id,
         @RequestParam(value = "myParam", required = true) @Valid @Pattern(regexp = MY_REGEX) String myParamRequest,
         @RequestParam(value = "callback", required = false) String callback,
         @Segment String apiKeyHeader) {

     // Stuff here...
 }

You will register the handler method argument argument argument in WebMvcConfigurationAdapter:

@Configuration
public class MvcConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
        argumentResolvers.add(segmentHandler());
    }

    @Bean
    public SegmentHandlerMethodArgumentResolver segmentHandler() {
        return new SegmentHandlerMethodArgumentResolver();
    }

}

Answer 2

1)

HttpServletRequest .

@RestController
public class HomeController {
    public ResponseEntity<String> test(HttpServletRequest request){
        if(request.getHeader("apiKeyHeader") == null){
            return new ResponseEntity<String>(HttpStatus.BAD_REQUEST);
        }
        return new ResponseEntity<String>(HttpStatus.OK);
    }
}

2)

@RequestMapping(value = "/test", method = RequestMethod.POST)
public ResponseEntity<String> test(@RequestHeader(value="myheader") String myheader){
    return new ResponseEntity<String>(HttpStatus.OK);
}

:

{
  "timestamp": 1469805110889,
  "status": 400,
  "error": "Bad Request",
  "exception": "org.springframework.web.bind.ServletRequestBindingException",
  "message": "Missing request header 'myheader' for method parameter of type String",
  "path": "/test"
}

.

3)

- , . ( 1), , 400 . , .

@Bean
public FilterRegistrationBean someFilterRegistration() { 
    FilterRegistrationBean registration = new FilterRegistrationBean();
    registration.setFilter(apiHeaderFilter());
    registration.addUrlPatterns("/example/*");
    registration.setName("apiHeaderFilter");
    registration.setOrder(1);
    return registration;
} 

@Bean(name = "ApiHeaderFilter")
public Filter apiHeaderFilter() {
    return new ApiHeaderFilter();
}

headers @RequestMapping

@RequestMapping(value = "/test", method = RequestMethod.POST,
    headers = {"content-type=application/json"})

404, .

Answer 3

It is possible to apply in Spring Spring, place an order JIRA . However, I was able to achieve what you are trying using annotation @Validatedon the controller.

@RestController
@RequestMapping("/user")
@Validated
public class UserController {

   @GetMapping("/{loginId}")
   public User getUserBy(@PathVariable @LoginID final String loginId) {
      // return some user
   }
}

Here @LoginIDis the custom validator. And @Validatedfrom org.springframework.validation.annotation.Validatedwhich makes the org.springframework.validation.annotation.Validateddeal.

Answer 4

Header verification can also be performed using the following method.

@Configuration
public class ApiHeaderFilter extends GenericFilterBean {

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest)servletRequest;
        HttpServletResponse response = (HttpServletResponse)servletResponse;
        String token = request.getHeader("token");
        if (StringUtil.isNullOrEmpty(token)) {
            response.sendError(HttpServletResponse.SC_UNAUTHORIZED);
            return;
        }
        filterChain.doFilter(servletRequest,servletResponse);
    }
}