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
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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
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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;@Slf4jpublic 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
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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
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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
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@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
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request.getRequestURL() http://localhost:8080/CarsiLogCenter_new/idpstat.jsprequest.getRequestURI() /CarsiLogCenter_new/idpstat.jsprequest.getContextPath()/CarsiLogCenter_newrequest.getServletPath() /idpstat.jsprequest.getQueryString() action=idp.sptopn |
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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
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<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：
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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@Configurationpublic 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服务器之家。
原文链接：https://blog.csdn.net/m0_37701381/article/details/103303154
