It might be hard to explain why, but I have this situation where I need to get the request url mapping string of currently requested url.
Like if I have a GET URL as "/Test/x/{number}"
I want to get "/Test/x/{number}" not "/Test/x/1"
can I get the actual declared url string in interceptor?
If this is possible how can I achieve this
You can implement a HanderInterceptor to intercept, pre or post, request and introspect the method being called.
public class LoggingMethodInterceptor implements HandlerInterceptor {
Logger log = LoggerFactory.getLogger(LoggingMethodInterceptor.class);
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
HandlerMethod method = (HandlerMethod) handler;
GetMapping mapping = method.getMethodAnnotation(GetMapping.class);
log.info("URL is {}", Arrays.toString(mapping.value()));
return true;
}
}
This will output, URL is [/hello/{placeholder}]
Full example can be found here, https://github.com/Flaw101/spring-method-interceptor
You could add more logic to introspect only certain methods, certain types of requests etc. etc.
I think that you can get it with reflection and getting @RequestMapping anotations. for example when you use @RequestMapping(value = "/Test/x/{number}", method = RequestMethod.GET)
the value is what you are looking for if I got it right!
You only must find the controller class type. Its possible I think but I didn't test it.
Check this:
In a Spring-mvc interceptor, how can I access to the handler controller method?
First it may be solved if the HandlerMethod was right but if you get cast error then you must get the controller class [I think]. When you get the controller class then you can looking for the method with according @RequestMapping annotation.
So
1- Find the controller class type
2- Search all methods with in the class by reflection
3- Check method annotations with specified url and specified method [GET / POST]
4- select the best candidate
If you have more than two URL parameter this method is not good!
