package org.jeecg.config.sign.interceptor;
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import java.io.PrintWriter;
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import java.util.SortedMap;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.jeecg.common.api.vo.Result;
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import org.jeecg.common.constant.CommonConstant;
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import org.jeecg.common.util.DateUtils;
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import org.jeecg.common.util.oConvertUtils;
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import org.jeecg.config.sign.util.BodyReaderHttpServletRequestWrapper;
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import org.jeecg.config.sign.util.HttpUtils;
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import org.jeecg.config.sign.util.SignUtil;
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import org.springframework.web.servlet.HandlerInterceptor;
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import com.alibaba.fastjson.JSON;
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import lombok.extern.slf4j.Slf4j;
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/**
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* 签名拦截器
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* @author qinfeng
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*/
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@Slf4j
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public class SignAuthInterceptor implements HandlerInterceptor {
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/**
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* 5分钟有效期
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*/
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private final static long MAX_EXPIRE = 5 * 60;
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@Override
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public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
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log.info("Sign Interceptor request URI = " + request.getRequestURI());
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HttpServletRequest requestWrapper = new BodyReaderHttpServletRequestWrapper(request);
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//获取全部参数(包括URL和body上的)
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SortedMap<String, String> allParams = HttpUtils.getAllParams(requestWrapper);
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//对参数进行签名验证
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String headerSign = request.getHeader(CommonConstant.X_SIGN);
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String xTimestamp = request.getHeader(CommonConstant.X_TIMESTAMP);
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if(oConvertUtils.isEmpty(xTimestamp)){
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Result<?> result = Result.error("Sign签名校验失败！");
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log.error("Sign 签名校验失败！Header xTimestamp 为空");
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//校验失败返回前端
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response.setCharacterEncoding("UTF-8");
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response.setContentType("application/json; charset=utf-8");
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PrintWriter out = response.getWriter();
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out.print(JSON.toJSON(result));
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return false;
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}
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//客户端时间
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Long clientTimestamp = Long.parseLong(xTimestamp);
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int length = 14;
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int length1000 = 1000;
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//1.校验签名时间（兼容X_TIMESTAMP的新老格式）
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if (xTimestamp.length() == length) {
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//a. X_TIMESTAMP格式是 yyyyMMddHHmmss (例子：20220308152143)
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if ((DateUtils.getCurrentTimestamp() - clientTimestamp) > MAX_EXPIRE) {
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log.error("签名验证失败:X-TIMESTAMP已过期，注意系统时间和服务器时间是否有误差！");
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throw new IllegalArgumentException("签名验证失败:X-TIMESTAMP已过期");
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}
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} else {
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//b. X_TIMESTAMP格式是 时间戳 (例子：1646552406000)
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if ((System.currentTimeMillis() - clientTimestamp) > (MAX_EXPIRE * length1000)) {
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log.error("签名验证失败:X-TIMESTAMP已过期，注意系统时间和服务器时间是否有误差！");
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throw new IllegalArgumentException("签名验证失败:X-TIMESTAMP已过期");
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}
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}
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//2.校验签名
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boolean isSigned = SignUtil.verifySign(allParams,headerSign);
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if (isSigned) {
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log.debug("Sign 签名通过！Header Sign : {}",headerSign);
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return true;
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} else {
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log.error("request URI = " + request.getRequestURI());
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log.error("Sign 签名校验失败！Header Sign : {}",headerSign);
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//校验失败返回前端
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response.setCharacterEncoding("UTF-8");
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response.setContentType("application/json; charset=utf-8");
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PrintWriter out = response.getWriter();
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Result<?> result = Result.error("Sign签名校验失败！");
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out.print(JSON.toJSON(result));
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return false;
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}
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}
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}
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