Subversion Repositories SmartDukaan

package com.spice.profitmandi.web.interceptor;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LogManager;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.Cache;
import org.springframework.cache.CacheManager;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.spice.profitmandi.common.exception.ProfitMandiBusinessException;
import com.spice.profitmandi.common.model.UserInfo;
import com.spice.profitmandi.service.authentication.JWTUtil;
import com.spice.profitmandi.common.web.util.ResponseSender;

@Component
public class PostInterceptor implements HandlerInterceptor {

    private static final Logger LOGGER = LogManager.getLogger(PostInterceptor.class);

    @Autowired
    private ResponseSender<?> responseSender;

    @Autowired
    private CacheManager timeoutCacheManager;

    @Autowired
    JWTUtil jwtUtil;

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object arg2, Exception arg3)
            throws Exception {
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object arg2, ModelAndView arg3)
            throws Exception {
        LOGGER.info("request is received after : "+request.getRequestURL().toString());
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object object) throws Exception {
        LOGGER.info("request is received in post interceptor before [{}] with method [{}]", request.getRequestURL().toString(), request.getMethod());
        if ("POST".equalsIgnoreCase(request.getMethod())) {
            String idempotencyKey = request.getHeader("IdempotencyKey");
            if (idempotencyKey == null || idempotencyKey.isEmpty()) {
//                response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Missing idempotency token in header");
                return true;
            }

            Cache cache = timeoutCacheManager.getCache("IdempotencyKey");
            if (cache != null) {
                if (cache.get(idempotencyKey) != null) {
                    response.setStatus(HttpServletResponse.SC_OK);
                    response.getWriter().write("Duplicate request. Idempotency Key already processed.");
                    return false;
                } else {
                    cache.put(idempotencyKey, "PROCESSED");
                    return true;
                }
            }
        }
        return true;
    }

    private UserInfo getUserInfo(String token) throws ProfitMandiBusinessException{
        return jwtUtil.getUserInfo(token);
    }
}