springMVC将request解密,response加密

1.使用 Filter 将request数据解密

 1.1 Filter 代码

@Component
public class DecryptFilter extends OncePerRequestFilter {

    private static final Logger logger = LoggerFactory.getLogger(DecryptFilter.class);

    private final ObjectMapper objectMapper = new ObjectMapper();

    @Override
    protected void doFilterInternal(HttpServletRequest request,
                                    HttpServletResponse response,
                                    FilterChain filterChain) throws ServletException, IOException {
        boolean shouldEncrypt = false;
        String version = request.getHeader(AuthConstants.VERSION_CODE);
        String contentType = request.getContentType();
        String requestBody = null;
        if (check(version, request.getMethod()) && StringUtils.isNotEmpty(contentType)) {
            if (org.springframework.util.StringUtils.substringMatch(contentType, 0, MediaType.APPLICATION_FORM_URLENCODED_VALUE)) {
                shouldEncrypt = true;
                requestBody = convertFormToString(request);
            } else if (org.springframework.util.StringUtils.substringMatch(contentType, 0, MediaType.APPLICATION_JSON_VALUE)) {
                shouldEncrypt = true;
                requestBody = convertInputStreamToString(request.getInputStream());
            }
        }

        if (shouldEncrypt) {
            Map parameterMap = new LinkedHashMap<>();
            DecryptHttpWrapper wrapper = new DecryptHttpWrapper(request, objectMapper.readValue(requestBody, parameterMap.getClass()));
            filterChain.doFilter(wrapper, response);
        } else {
            filterChain.doFilter(request, response);
        }
    }

    /**
     * 判断是否需要加解密
     **/
    public static boolean check(final String version, final String method) {
        boolean shouldEncrypt = false;
        try {
            if (StringUtils.isNotEmpty(version) && StringUtils.isNotEmpty(method)) {
                String checkMethod = method.toUpperCase();
                int versionInt = Integer.parseInt(version);
                if (versionInt >= AndroidVersion.DECRYPT_VERSION && ("POST".equals(checkMethod) || "PUT".equals(checkMethod))) {
                    shouldEncrypt = true;
                }
            }
        } catch (Exception e) {
            logger.error(e.getMessage());
            shouldEncrypt = false;
        }
        return shouldEncrypt;
    }

    /**
     * 判断是否需要加解密
     **/
    public static boolean check(final String version) {
        boolean shouldEncrypt = false;
        try {
            if (StringUtils.isNotEmpty(version)) {
                int versionInt = Integer.parseInt(version);
                if (versionInt >= AndroidVersion.DECRYPT_VERSION) {
                    shouldEncrypt = true;
                }
            }
        } catch (Exception e) {
            logger.error(e.getMessage());
            shouldEncrypt = false;
        }
        return shouldEncrypt;
    }

    private String convertFormToString(HttpServletRequest request) {
        String data = request.getParameter(AuthConstants.SECURE_DATA);
        try {
            return SecureHelper.decryptString(data);
        } catch (Exception e) {
            throw new IllegalArgumentException(e);
        }
    }

    private String convertInputStreamToString(InputStream inputStream) throws IOException {
        Map map = new LinkedHashMap<>();
        String data = StreamUtils.copyToString(inputStream, Charset.forName("UTF-8"));
        map = objectMapper.readValue(data, map.getClass());
        return SecureHelper.decryptString(map.get(AuthConstants.SECURE_DATA));
    }
}

1.2 注册Filter

    @Bean
    public FilterRegistrationBean customEncryptFilter() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new DecryptFilter());
        registration.addUrlPatterns("/**");
        registration.setName(DecryptFilter.class.getName());
        registration.setOrder(Integer.MAX_VALUE);
        return registration;
    }

1.3 自定义的  RequestWrapper

public class DecryptHttpWrapper extends HttpServletRequestWrapper {

    // todo: 还是使用Object比较好，防止出现复杂的数据类型
    private Map parameterMap = new LinkedHashMap<>();

    public DecryptHttpWrapper(HttpServletRequest request, Map parameterMap) {
        super(request);
        parameterMap.forEach((key, value) -> {
            if (value != null) {
                this.parameterMap.put(key, new String[]{value.toString()});
            }
        });
    }

    @Override
    public Enumeration getParameterNames() {
        Vector vector = new Vector(parameterMap.keySet());
        return vector.elements();
    }

    @Override
    public String getParameter(String name) {
        String[] results = parameterMap.get(name);
        if (results != null && results.length > 0) {
            return results[0];
        } else {
            return null;
        }
    }

    @Override
    public String[] getParameterValues(String name) {
        return parameterMap.get(name);
    }

    @Override
    public Map getParameterMap() {
        return parameterMap;
    }

    public void setParameterMap(Map parameterMap) {
        this.parameterMap = parameterMap;
    }
}

2.使用 ControllerAdvice 将response数据加密

 2.1 代码

@ControllerAdvice
public class DecryptResponseBodyAdvice implements ResponseBodyAdvice