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logi-security 提供项目大多都需要的一些基础功能（用户、角色、权限、登录、注册、操作记录）

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package com.didiglobal.logi.security.util;

import org.springframework.util.StringUtils;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

/**
 * @author cjm
 *
 * http请求操作类
 */
public class HttpRequestUtil {

    public static final String USER_ID  = "X-SSO-USER-ID";

    public static final String USER     = "X-SSO-USER";

    public static final String PROJECT_ID = "X-LOGI-SECURITY-PROJECT-ID";

    public static final Integer REDIRECT_CODE                     = 401;

    public static final Integer COOKIE_OR_SESSION_MAX_AGE_UNIT_SEC = 24 * 60 * 60;

    private HttpRequestUtil() {
        throw new IllegalStateException("Utility class");
    }

    public static String getOperator(){
        HttpServletRequest request =
                ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

        return getOperator(request);
    }

    public static String getOperator(HttpServletRequest request) {
        HttpSession session = request.getSession();
        String operator = (String) session.getAttribute(HttpRequestUtil.USER);
        if(StringUtils.isEmpty(operator)) {
            return getOperatorFromHeader(request);
        }
        return operator;
    }

    public static String getOperatorFromHeader(HttpServletRequest request) {
        String operator = request.getHeader(USER);
        if(StringUtils.isEmpty(operator)) {
            return "";
        }
        return operator;
    }

    public static Integer getOperatorId(HttpServletRequest request) {
        HttpSession session = request.getSession();
        Integer id = (Integer) session.getAttribute(HttpRequestUtil.USER_ID );
        if(id == null) {
            return getOperatorIdFromHeader(request);
        }
        return id;
    }

    public static Integer getOperatorIdFromHeader(HttpServletRequest request) {
        Integer id = Integer.valueOf(request.getHeader(USER_ID));
        if(id == null) {return -1;}
        return id;
    }

    public static Integer getProjectId(HttpServletRequest request, int defaultAppid) {
        String appidStr = request.getHeader( PROJECT_ID );

        if (StringUtils.isEmpty(appidStr)) {
            return defaultAppid;
        }

        return Integer.valueOf(appidStr);
    }

    public static Integer getProjectId(HttpServletRequest request) {
        String appidStr = request.getHeader( PROJECT_ID );

        if (StringUtils.isEmpty(appidStr)) {
            return null;
        }

        return Integer.valueOf(appidStr);
    }
}