spring boot实现在request里解密参数返回

目录

• spring boot在request里解密参数返回
• 前言
• 代码块
• 最后
• Spring boot配置Aop获取controller里的request中的参数及其返回值
• 首先在你的Maven的pom文件里加入aop的依赖
• 下面为我所有被请求到的controller加上Aop的功能

spring boot在request里解密参数返回

前言

有个业务需求，一个请求来源web，一个请求来源APP，web需求验证签名，APP的参数是经过加密，所以出现了两个Controller，除了解密获取参数方式不一样，其他内容一模一样，这样不太合理，所以我决定重构。

思路：既然只是解密不一样，获取到的参数是一样的，那可以写一个过滤器，在里面就把参数解密好，然后返回

Spring Boot在请求的时候是不允许直接修改HttpServletRequest里的paramsMap参数的，但是提供了一个HttpServletRequestWrapper类，继承这个类重写两个方法就可以了。

代码块

重写HttpServletRequestWrapper

import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.*;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.Map;
public class ParameterRequest extends HttpServletRequestWrapper {
    private Map<String, String[]> params = new HashMap<>(16);
    public ParameterRequest(HttpServletRequest request) throws IOException {
        super(request);
        this.params.putAll(request.getParameterMap());
    }
    /**
     * 重载一个构造方法
     *
     * @param request
     * @param extendParams
     */
    public ParameterRequest(HttpServletRequest request, Map<String, String[]> extendParams) throws IOException {
        this(request);
        addAllParameters(extendParams);
    }
    @Override
    public String getParameter(String name) {
        String[] values = params.get(name);
        if (values == null || values.length == 0) {
            return null;
        }
        return values[0];
    }
    @Override
    public String[] getParameterValues(String name) {
        return params.get(name);
    }
    public void addAllParameters(Map<String, String[]> otherParams) {
        for (Map.Entry<String, String[]> entry : otherParams.entrySet()) {
            addParameter(entry.getKey(), entry.getValue());
        }
    }
    public void addParameter(String name, Object value) {
        if (value != null) {
            if (value instanceof String[]) {
                params.put(name, (String[]) value);
            } else if (value instanceof String) {
                params.put(name, new String[]{(String) value});
            } else {
                params.put(name, new String[]{String.valueOf(value)});
            }
        }
    }
}

思路是重写自定义一个Map存入参数，将解密后需要的参数放入，然后在过滤器中执行这个新的request

过滤器

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.context.support.SpringBeanAutowiringSupport;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@Slf4j
public class WebParamFilter implements Filter {
    private static final String OPTIONS = "OPTIONS";
    @Value("${jwt.info.urlPatterns}")
    private List<String> urlPatterns;
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this, filterConfig.getServletContext());
    }
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        log.info("开始过滤器===============");
        if (!isFilter(request)) {
            writerError(response, RetEnum.RET_TOKEN_ERROR);
            return;
        }
        // 从请求头从获取请求类型，1是WEB，2是APP
        String requestType = request.getHeader("requestType");
        if (StringUtils.isEmpty(requestType)) {
            writerError(response, RetEnum.RET_NOT_HEADER_ERROR);
            return;
        }
        Map<String, String[]> paramsMap = new HashMap<>();
        if ("1".equals(requestType)) {
        	// 验证签名，签名错误直接返回
            if (!compareSign(request)) {
                writerError(response, "签名错误", 500);
                return;
            }
            // 将请求的参数从request中取出，转换成JSON，放入自定义的Map中带给控制器
            paramsMap.put("params", new String[]{JSONUtil.getJSONParam(request).toJSONString()});
            ParameterRequest req = new ParameterRequest(request, paramsMap);
            filterChain.doFilter(req, response);
        } else if ("2".equals(requestType)) {
        	// APP请求方式比较特殊，所以要从requestBody里读出JSON加密数据
            String bodyStr = RequestBodyUtil.read(request.getReader());
            // 然后再解密，拿到真正的参数转换成JSON，放入自定义的Map中带给控制器
            JSONObject jsonParam = getJsonParam(bodyStr);
            paramsMap.put("params", new String[]{jsonParam.toJSONString()});
            ParameterRequest req = new ParameterRequest(request, paramsMap);
            filterChain.doFilter(req, response);
        } else {
            writerError(response, "无效的请求来源", 500);
        }
    }
    @Override
    public void destroy() {
    }
    /**
     * 筛选
     *
     * @param request
     * @return
     */
    private boolean isFilter(HttpServletRequest request) {
        if (OPTIONS.equals(request.getMethod())) {
            return true;
        }
        if (isInclude(request)) {
            //如果是属于排除的URL，比如登录，注册，验证码等URL，则直接通行
            log.info("直接通过");
            return true;
        }
        return tokenCheck(request);
    }
    /**
     * 排除不需要过滤的URL
     *
     * @param request
     * @return
     */
    private boolean isInclude(HttpServletRequest request) {
        String url = request.getRequestURI().substring(request.getContextPath().length());
        log.info("请求url:{}", url);
        for (String patternUrl : urlPatterns) {
            Pattern p = Pattern.compile(patternUrl);
            Matcher m = p.matcher(url);
            if (m.find()) {
                return true;
            }
        }
        return false;
    }
    /**
     * 效验token是否有效
     *
     * @param request
     * @return
     */
    private boolean tokenCheck(HttpServletRequest request) {
        String authToken = request.getHeader("accessToken");
        log.info("请求头中令牌token:{}", authToken);
        // ...业务代码
        return false;
    }
    /**
     * 错误写出
     *
     * @param response
     * @param retEnum
     * @throws IOException
     */
    private void writerError(HttpServletResponse response, String msg, int code) throws IOException {
        //验证不通过
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
        response.setStatus(HttpServletResponse.SC_OK);
        //将验证不通过的错误返回
        ObjectMapper mapper = new ObjectMapper();
        Map<String, Object> resultMap = new HashMap<>(3);
        resultMap.put("code", code);
        resultMap.put("msg", msg);
        resultMap.put("data", null);
        response.getWriter().write(mapper.writeValueAsString(resultMap));
    }
    /**
     * web效验签名
     *
     * @param request
     * @return
     */
    public boolean compareSign(HttpServletRequest request) {
        JSONObject param = JSONUtil.getJSONParam(request);
        String sign = JSONUtil.getParamRequired(param, String.class, "sign");
       // ...业务代码
        return s.equals(sign);
    }
 	/**
     * APP解密参数
     *
     * @param json
     * @return
     */
    public JSONObject getJsonParam(String json) {
        JSONObject jsonParam = JSON.parseObject(json);
        String aos = jsonParam.getString("aos");
        String params = jsonParam.getString("params");
        String param = null;
        if (jsonParam != null && !StringUtils.isEmpty(aos) && !StringUtils.isEmpty(params)) {
            String key = RSA.rsaDecrypt(aos, "自定义的私钥");
            if (StringUtils.isBlank(key)) {
                return null;
            }
            try {
                param = AES256.decrypt(params, key);
            } catch (Exception e) {
                e.printStackTrace();
            }
            if (StringUtils.isBlank(param)) {
                return null;
            }
        }
        if (StringUtils.isBlank(param)) {
            return null;
        }
        return JSONObject.parseObject(param);
    }
}

思路都在代码中备注了，就是在过滤器中，一层层解析，比如token等，然后再分别解析两种请求的参数，放入params里，其中用到的两个工具类如下

JSONUtil

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.bind.MissingServletRequestParameterException;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
public class JSONUtil {
    public static JSONObject getJSONParam(HttpServletRequest request){
        Map<String, String[]> parameterMap = request.getParameterMap();
        JSONObject returnObject = new JSONObject();
        for (Map.Entry<String, String[]> entry : parameterMap.entrySet()) {
            String value = "";
            String[] values = entry.getValue();
            if (values != null){
                for (String s : values) {
                    value = s + ",";
                }
                value = value.substring(0, value.length() - 1);
            }
            returnObject.put(entry.getKey(), value);
        }
        return returnObject;
    }
    public static<T> T getParam(JSONObject param, Class<T> tClass, String key){
        if (param == null) {
            return null;
        }
        return param.getObject(key, tClass);
    }
    public static<T> T getParamRequired(JSONObject param, Class<T> tClass, String key){
        if (param == null) {
            throw new RuntimeException(getErrMsg(key));
        }
        T object = param.getObject(key, tClass);
        if (object == null){
            throw new RuntimeException(getErrMsg(key));
        }
        return object;
    }
    private static String getErrMsg(String key) {
        return "参数" + key + "必填";
    }
}

RequestBodyUtil

import java.io.IOException;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
/**
 * 解析Body数据
 */
public class RequestBodyUtil {
    private static final int BUFFER_SIZE = 1024 * 8;
    private RequestBodyUtil(){}
    public static String read(Reader reader) throws IOException {
        StringWriter writer = new StringWriter();
        try {
            write(reader, writer);
            return writer.getBuffer().toString();
        } finally {
            writer.close();
        }
    }
    public static long write(Reader reader, Writer writer) throws IOException {
        return write(reader, writer, BUFFER_SIZE);
    }
    public static long write(Reader reader, Writer writer, int bufferSize) throws IOException {
        int read;
        long total = 0;
        char[] buf = new char[BUFFER_SIZE];
        while ((read = reader.read(buf)) != -1) {
            writer.write(buf, 0, read);
            total += read;
        }
        return total;
    }
}

最后

注册过滤器我就不说了，SpringBoot注册过滤器方式很多，看如何在控制器中接收参数

    @PostMapping("/test")
    public Result test(@RequestParam String params){
        System.out.println("解密后的参数：" + params);
        return ResponseMsgUtil.success(params);
    }

名字只要和过滤器中自定义的Map里的Key对应，就会被拿到参数

Spring boot配置Aop获取controller里的request中的参数及其返回值

示例：

当前url：http://localhost:8080/CarsiLogCenter_new/idpstat.jsp?action=idp.sptopn

request.getRequestURL() http://localhost:8080/CarsiLogCenter_new/idpstat.jsp
request.getRequestURI() /CarsiLogCenter_new/idpstat.jsp
request.getContextPath()/CarsiLogCenter_new
request.getServletPath() /idpstat.jsp
request.getQueryString() action=idp.sptopn

    public static String getLastAccessUrl(HttpServletRequest request) {
        StringBuffer requestURL = request.getRequestURI();
        String queryString = request.getQueryString();
        if (queryString == null) {
            return requestURL.toString();
        }
        return requestURL + "?" + queryString;
    }

1、request.getRequestURL()

• 返回的是完整的url，包括Http协议，端口号，servlet名字和映射路径，但它不包含请求参数。

2、request.getRequestURI()

• 得到的是request URL的部分值，并且web容器没有decode过的

3、request.getContextPath()

• 返回 the context of the request.

4、request.getServletPath()

• 返回调用servlet的部分url.

5、request.getQueryString()

• 返回url路径后面的查询字符串

首先在你的Maven的pom文件里加入aop的依赖

  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-aop</artifactId>
  </dependency>

在spring boot里面一切配置都是很简单的，

下面为我所有被请求到的controller加上Aop的功能

看码吧：

import javax.servlet.http.HttpServletRequest;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import com.google.gson.Gson;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;;
@Aspect   //定义一个切面
@Configuration
public class LogRecordAspect {
private static final Logger logger = LoggerFactory.getLogger(UserInterceptor.class);
    // 定义切点Pointcut
    @Pointcut("execution(* com.jiaobuchong.web.*Controller.*(..))")
    public void excudeService() {
    }
    @Around("excudeService()")
    public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
        RequestAttributes ra = RequestContextHolder.getRequestAttributes();
        ServletRequestAttributes sra = (ServletRequestAttributes) ra;
        HttpServletRequest request = sra.getRequest();
        String url = request.getRequestURL().toString();
        String method = request.getMethod();
        String uri = request.getRequestURI();
        String queryString = request.getQueryString();
        logger.info("请求开始, 各个参数, url: {}, method: {}, uri: {}, params: {}", url, method, uri, queryString);
        // result的值就是被拦截方法的返回值
        Object result = pjp.proceed();
        Gson gson = new Gson();
        logger.info("请求结束，controller的返回值是 " + gson.toJson(result));
        return result;
    }
}

只要加上上面这个类，Aop就算配置好了，不信，去访问以下你的Controller试试。对比以前配置aop的方式(xml文件)，现在的配置都到Java代码里来了，@Configuration这个Annotation就是JavaConfig的典型代表，Spring boot在启动时会会自动去加载这些配置，实现相应的配置功能。

以上为个人经验，希望能给大家一个参考，也希望大家多多支持我们。