Filter+ThreadLocal处理请求头用户信息

Filter拦截器:

@Slf4j
@WebFilter(filterName = "operatorLoginFilter", urlPatterns = "/*")
public class OperatorLoginFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;

        //登录信息
        LoginInfo loginInfo = new LoginInfo();
        loginInfo.setIp(stringToInt(httpServletRequest.getHeader("X-Real-IP")));
        loginInfo.setDeviceId(httpServletRequest.getHeader("deviceid"));
        OperatorContext.setLoginInfo(loginInfo);

        try {
            //操作人信息
            OperatorInfo operatorInfo = new OperatorInfo();
            String token = httpServletRequest.getHeader("token");

            if (!StringUtils.isEmpty(token)) {
                //从token取
                String deviceId = httpServletRequest.getHeader("deviceid");
                operatorInfo = queryOperatorInfo(token, deviceId);
            } else {
                //从cookie取
                operatorInfo.setUid(getCookie(httpServletRequest, "user_name"));
            }
            OperatorContext.setOperatorInfo(operatorInfo);
        } catch (Exception var14) {
            log.error("调用用户中心查询用户出错", var14);
            OperatorContext.release();
        }

        try {
            filterChain.doFilter(servletRequest, servletResponse);
        } finally {
            OperatorContext.release();
        }
    }

    @Override
    public void destroy() {

    }

    private OperatorInfo queryOperatorInfo(String token, String deviceId){
        return new OperatorInfo();
    }

    private static int stringToInt(String s) {
        return InetAddresses.coerceToInteger(InetAddresses.forString(s));
    }

    private static String getCookie(HttpServletRequest request, String key) {
        Cookie[] cookies = request.getCookies();
        if (cookies == null) {
            return null;
        } else {
            Cookie[] var3 = cookies;
            int var4 = cookies.length;

            for(int var5 = 0; var5 < var4; ++var5) {
                Cookie cookie = var3[var5];
                if (key.equals(cookie.getName())) {
                    return cookie.getValue();
                }
            }
            return null;
        }
    }
}

ThreadLocal:

public class OperatorContext {
    private static final ThreadLocal<OperatorInfo> OPERATOR_INFO_THREAD_LOCAL = new ThreadLocal<>();
    private static final ThreadLocal<LoginInfo> LOGIN_INFO_THREAD_LOCAL = new ThreadLocal<>();

    public OperatorContext() {
    }

    public static OperatorInfo getOperatorInfo() {
        return OPERATOR_INFO_THREAD_LOCAL.get();
    }

    public static void setOperatorInfo(OperatorInfo operatorInfo) {
        OPERATOR_INFO_THREAD_LOCAL.set(operatorInfo);
    }

    public static LoginInfo getLoginInfo() {
        return LOGIN_INFO_THREAD_LOCAL.get();
    }

    public static void setLoginInfo(LoginInfo loginInfo) {
        LOGIN_INFO_THREAD_LOCAL.set(loginInfo);
    }

    public static void release() {
        OPERATOR_INFO_THREAD_LOCAL.remove();
        LOGIN_INFO_THREAD_LOCAL.remove();
    }
}

业务逻辑获取登录信息,操作人信息:

public void getOperator() {
        OperatorInfo operatorInfo = OperatorContext.getOperatorInfo();
        log.info("操作人信息:{}", JsonUtil.toJson(operatorInfo));

        LoginInfo loginInfo = OperatorContext.getLoginInfo();
        log.info("登录信息:{}", JsonUtil.toJson(loginInfo));
    }

tips:

1,Filter拦截器拦截请求头信息并校验登录信息,然后调用OperatorContext.setOperatorInfo(operatorInfo)初始化当前线程登录信息,请求完成之后调用OperatorContext.release()清除当前线程登录信息.

2,ThreadLocal用于保存某个线程共享变量,对于同一个static ThreadLocal,不同线程只能从中get，set，remove自己的变量而不会影响其他线程的变量.

@Slf4j
@WebFilter(filterName = "operatorLoginFilter", urlPatterns = "/*")
public class OperatorLoginFilter implements Filter {

    @Override
public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;

//登录信息
LoginInfo loginInfo = new LoginInfo();
loginInfo.setIp(stringToInt(httpServletRequest.getHeader("X-Real-IP")));
loginInfo.setDeviceId(httpServletRequest.getHeader("deviceid"));
OperatorContext.setLoginInfo(loginInfo);

        try {
            //操作人信息
OperatorInfo operatorInfo = new OperatorInfo();
String token = httpServletRequest.getHeader("token");

            if (!StringUtils.isEmpty(token)) {
                //从token取
String deviceId = httpServletRequest.getHeader("deviceid");
operatorInfo = queryOperatorInfo(token, deviceId);
} else {
                //从cookie取
operatorInfo.setUid(getCookie(httpServletRequest, "user_name"));
}
            OperatorContext.setOperatorInfo(operatorInfo);
} catch (Exception var14) {
            log.error("调用用户中心查询用户出错", var14);
OperatorContext.release();
}

        try {
            filterChain.doFilter(servletRequest, servletResponse);
} finally {
            OperatorContext.release();
}
    }

    @Override
public void destroy() {

    }

    private OperatorInfo queryOperatorInfo(String token, String deviceId){
        return new OperatorInfo();
}

    private static int stringToInt(String s) {
        return InetAddresses.coerceToInteger(InetAddresses.forString(s));
}

    private static String getCookie(HttpServletRequest request, String key) {
        Cookie[] cookies = request.getCookies();
        if (cookies == null) {
            return null;
} else {
            Cookie[] var3 = cookies;
            int var4 = cookies.length;

            for(int var5 = 0; var5 < var4; ++var5) {
                Cookie cookie = var3[var5];
                if (key.equals(cookie.getName())) {
                    return cookie.getValue();
}
            }
            return null;
}
    }
}