第一次提交

whyclj

2019-10-29 1c0469e45346d464e0c5672ee68f9ecd4fb6be7c

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package com.fgkj.Filters; 
 
import java.io.IOException; 
import java.io.PrintWriter; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
 
import javax.servlet.Filter; 
import javax.servlet.FilterChain; 
import javax.servlet.FilterConfig; 
import javax.servlet.ServletException; 
import javax.servlet.ServletRequest; 
import javax.servlet.ServletResponse; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
 
import org.omg.CORBA.Request; 
 
import com.fgkj.actions.ActionUtil; 
import com.fgkj.dto.ServiceModel; 
 
public class CrossDomainLimitFilter implements Filter{ 
    public static final int max_connect_count = 10; 
     
    public final static String CROSS_DOMAIN_KEY    = "44c4a294cb66d13727c14b065dbe8548";        //跨域请求 key 
         
    public void doFilter(ServletRequest req, ServletResponse resp, 
            FilterChain chain) throws IOException, ServletException { 
        HttpServletRequest request=(HttpServletRequest)req; 
        HttpServletResponse response =(HttpServletResponse)resp; 
        String URL=request.getRequestURI(); 
        request.setCharacterEncoding("UTF-8"); 
        response.setCharacterEncoding("UTF-8"); 
        response.setContentType("text/html;charset=utf-8"); 
        //检测跨域访问的请求 
        if(URL != null && URL.endsWith("_ky")){ 
            String key = req.getParameter("key");                                        //获取校验码 
            ServiceModel model = new ServiceModel();                                     
            boolean isAlowVisit = false;                                                //是否允许访问 
            //System.out.println(key+"=="+CROSS_DOMAIN_KEY); 
            if(key != null && CROSS_DOMAIN_KEY.equals(key)){ 
                isAlowCrossDomain(response); 
                //System.out.println("开始休眠500毫秒秒"); 
                try { 
                    Thread.sleep(500); 
                } catch (InterruptedException e) { 
                    e.printStackTrace(); 
                } finally{ 
                    //System.out.println("休眠结束....."); 
                } 
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
                System.out.println("跨域访问域名或ip:"+request.getRemoteHost()+" At "+sdf.format(new Date())); 
                 
                isAlowVisit = true; 
            }else{ 
                model.setMsg("校验码发送失败,key:"+key); 
            }             
            if(isAlowVisit){ 
                //通过请求 
                chain.doFilter(request, response);        //允许跨域 
            }else{ 
                //不能放行的请求 
                PrintWriter out = response.getWriter(); 
                out.write(ActionUtil.getGson().toJson(model)); 
                out.flush(); 
                out.close(); 
            } 
        }else{ 
            //非跨域请求 
            chain.doFilter(request, response); 
            //SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
            //System.out.println("非跨域请求不允许放行"+request.getRemoteHost()+" At "+sdf.format(new Date())); 
        } 
         
    } 
 
    public void init(FilterConfig arg0) throws ServletException { 
         
    } 
 
    public void destroy() { 
         
    } 
     
    /** 
     * 允许跨域访问 
     * @param response 
     */ 
    public void isAlowCrossDomain(HttpServletResponse response){ 
        response.setHeader("Access-Control-Allow-Origin", "*");                //允许跨域访问 
        response.setHeader("Access-Control-Allow-Headers", "X-Requested-With,content-type,token"); 
        response.setHeader("Access-Control-Allow-Methods", "GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH"); 
    } 
     
    public static void main(String[] args) { 
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
        System.out.println(sdf.format(new Date())); 
    } 
}