Filter -跨域及过滤Token

直接上代码

package com.filter;

import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
import com.thetransactioncompany.cors.CORSConfiguration;
import com.thetransactioncompany.cors.CORSFilter;
/**
 * 服务端跨域处理过滤器,该过滤器需要依赖cors-filter-2.2.1.jar和java-property-utils-1.9.1.jar
 * @author DragonetYu@163.com
 *
 */
@WebFilter(urlPatterns={"/*"},asyncSupported=true,
initParams={
    @WebInitParam(name="cors.allowOrigin",value="*"),
    @WebInitParam(name="cors.supportedMethods",value="CONNECT, DELETE, GET, HEAD, OPTIONS, POST, PUT, TRACE"),
    @WebInitParam(name="cors.supportedHeaders",value="token,Accept, Origin, X-Requested-With, Content-Type, Last-Modified"),//注意，如果token字段放在请求头传到后端，这里需要配置
    @WebInitParam(name="cors.exposedHeaders",value="Set-Cookie"),
    @WebInitParam(name="cors.supportsCredentials",value="true")
})
public class Filter0_CrossOriginResource extends CORSFilter implements javax.servlet.Filter{


    public void init(FilterConfig config) throws ServletException {
        System.out.println("跨域资源处理过滤器初始化了");
        super.init(config);
    }
    
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        System.out.println("跨域过滤器");
        super.doFilter(request, response, chain);
    }


    public void setConfiguration(CORSConfiguration config) {
        super.setConfiguration(config);
    }
    
}

package com.filter;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

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.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.minidev.json.JSONObject;

import com.jwt.Jwt;
import com.jwt.TokenState;
/**
 * toekn校验过滤器，所有的API接口请求都要经过该过滤器(除了登陆接口)
 * @author DragonetYu@163.com
 *
 */
@WebFilter(urlPatterns="/servlet/*")
public class Filter1_CheckToken  implements Filter {


    @Override
    public void doFilter(ServletRequest argo, ServletResponse arg1,
            FilterChain chain ) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest) argo;
        HttpServletResponse response=(HttpServletResponse) arg1;
//        response.setHeader("Access-Control-Allow-Origin", "*");
        if(request.getRequestURI().endsWith("/servlet/login")){
            //登陆接口不校验token，直接放行
            chain.doFilter(request, response);
            return;
        }
        //其他API接口一律校验token
        System.out.println("开始校验token");
        //从请求头中获取token
        String token=request.getHeader("token");
        Map<String, Object> resultMap=Jwt.validToken(token);
        TokenState state=TokenState.getTokenState((String)resultMap.get("state"));
        switch (state) {
        case VALID:
            //取出payload中数据,放入到request作用域中
            request.setAttribute("data", resultMap.get("data"));
            //放行
            chain.doFilter(request, response);
            break;
        case EXPIRED:
        case INVALID:
            System.out.println("无效token");
            //token过期或者无效，则输出错误信息返回给ajax
            JSONObject outputMSg=new JSONObject();
            outputMSg.put("success", false);
            outputMSg.put("msg", "您的token不合法或者过期了，请重新登陆");
            output(outputMSg.toJSONString(), response);
            break;
        }
        
        
    }
    
    
    public void output(String jsonStr,HttpServletResponse response) throws IOException{
        response.setContentType("text/html;charset=UTF-8;");
        PrintWriter out = response.getWriter();
//        out.println();
        out.write(jsonStr);
        out.flush();
        out.close();
        
    }
    
    @Override
    public void init(FilterConfig arg0) throws ServletException {
        System.out.println("token过滤器初始化了");
    }

    @Override
    public void destroy() {
        
    }

}

 

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