WebUtils

import java.io.PrintStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.log4j.Logger;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;

import com.meallink.core.context.ThreadWebContextHolder;
import com.meallink.core.context.WebContext;
import com.meallink.core.context.WebSession;
import com.meallink.core.exception.PropertyIsNullException;

public final class WebUtils {

    public static final class Http {

        /**
         * Get the request IP
         *
         * @param request
         * @return
         */
        public static String getIpAddr(HttpServletRequest request) {
            String ip = "0.0.0.0";
            ip = request.getHeader("x-forwarded-for");
            if (isInvalidIP(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (isInvalidIP(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (isInvalidIP(ip)) {
                ip = request.getRemoteAddr();
            }
            if (isInvalidIP(ip)) { // get X-real-ip from nginx
                ip = request.getHeader("X-real-ip");
            }
            if (isInvalidIP(ip) && null != request.getAttribute("X-real-ip")) {
                ip = request.getAttribute("X-real-ip").toString();
            }
            if (null == ip) {
                ip = "unknown";
            }
            return ip;
        }

        private static boolean isInvalidIP(String ip) {
            return ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip) || "127.0.0.1".equals(ip);
        }

        /**
         * Get the base path
         *
         * @param request
         * @return
         */
        public static String getBasePath(HttpServletRequest request) {
            String path = request.getContextPath();
            String basePath = request.getScheme() + "://"
                    + request.getServerName() + ":" + request.getServerPort()
                    + path;
            return basePath;
        }

        /**
         * Get the base path haven't port
         *
         * @param request
         * @return
         */
        public static String getBasePathNotPort(HttpServletRequest request) {
            String path = request.getContextPath();
            String basePath = request.getScheme() + "://"
                    + request.getServerName() + path;
            return basePath;
        }

        /**
         * Get the context path
         *
         * @param request
         * @return
         */
        public static String getContextPath(HttpServletRequest request) {
            String path = request.getContextPath();
            return path;
        }

        /**
         * @return
         */
        public static String getRealPath() {
            return Property.getRoot();
        }

        public static String getUserAgent(HttpServletRequest request) {
            return request.getHeader("user-agent");
        }

        public static String getMethod(HttpServletRequest request) {
            return request.getMethod();
        }
    }

    public static final class Property extends PropertyPlaceholderConfigurer {

        public static final Logger logger = Logger.getLogger(Property.class);

        private static Map
 
   propertyMap;

        @Override
        protected void processProperties(
                ConfigurableListableBeanFactory beanFactoryToProcess,
                Properties props) throws BeansException {
            super.processProperties(beanFactoryToProcess, props);
            propertyMap = new HashMap
  
   (); for (Object key : props.keySet()) { String keyStr = key.toString(); String value = props.getProperty(keyStr); propertyMap.put(keyStr, value); } } public static String getValue(String name) throws PropertyIsNullException { String value = propertyMap.get(name); if (StringUtils.isBlank(value)) { String error = "Property [" + name + "] is null"; logger.fatal(error); throw new PropertyIsNullException(error); } else { return value; } } public static String getRoot() { String rootKey = "com.meallink.root"; String cmsRoot = System.getProperty(rootKey); Enumeration
    enu = System.getProperties().propertyNames(); while (enu.hasMoreElements()) { Object key = enu.nextElement(); if (key.toString().startsWith(rootKey)) { cmsRoot = System.getProperty(key.toString()); break; } } logger.info(cmsRoot); return cmsRoot; } } public static final class StdOutErrRedirect { private final static Log logger = LogFactory .getLog(StdOutErrRedirect.class); public static void redirectSystemOutAndErrToLog() { PrintStream printStreamForOut = createLoggingWrapper(System.out, false); PrintStream printStreamForErr = createLoggingWrapper(System.out, true); System.setOut(printStreamForOut); System.setErr(printStreamForErr); } public static PrintStream createLoggingWrapper( final PrintStream printStream, final boolean isErr) { return new PrintStream(printStream) { @Override public void print(final String string) { if (!isErr) { logger.debug(string); } else { logger.error(string); } } @Override public void print(boolean b) { if (!isErr) { logger.debug(Boolean.valueOf(b)); } else { logger.error(Boolean.valueOf(b)); } } @Override public void print(char c) { if (!isErr) { logger.debug(Character.valueOf(c)); } else { logger.error(Character.valueOf(c)); } } @Override public void print(int i) { if (!isErr) { logger.debug(String.valueOf(i)); } else { logger.error(String.valueOf(i)); } } @Override public void print(long l) { if (!isErr) { logger.debug(String.valueOf(l)); } else { logger.error(String.valueOf(l)); } } @Override public void print(float f) { if (!isErr) { logger.debug(String.valueOf(f)); } else { logger.error(String.valueOf(f)); } } @Override public void print(double d) { if (!isErr) { logger.debug(String.valueOf(d)); } else { logger.error(String.valueOf(d)); } } @Override public void print(char[] x) { if (!isErr) { logger.debug(x == null ? null : new String(x)); } else { logger.error(x == null ? null : new String(x)); } } @Override public void print(Object obj) { if (!isErr) { logger.debug(obj); } else { logger.error(obj); } } }; } } public static final class Array { public static Long[] toLongArray(String value, String split) { String[] arr = value.split(split); Long[] array = new Long[arr.length]; for (int i = 0; i < arr.length; i++) { array[i] = Long.valueOf(arr[i].trim()); } return array; } /** * 将Long数组转换成"1,2,3..."的字符串格式 * * @param ids * @return */ public static String toString(Long[] ids) { StringBuilder b = new StringBuilder(); for (int i = 0; i < ids.length; i++) { b.append(ids[i]); b.append(","); } b.deleteCharAt(b.lastIndexOf(",")); return b.toString(); } /** * 将List转换成"1,2,3..."的字符串格式 * * @param ids * @return */ public static String toString(List
   
     list) { StringBuilder b = new StringBuilder(); for (int i = 0; i < list.size(); i++) { b.append(list.get(i)); b.append(","); } b.deleteCharAt(b.lastIndexOf(",")); return b.toString(); } } public static final class Session { private static final String SESSION_ID = "sessionId"; private static final String DEVICE_ID = "deviceId"; /** * 获取会话ID。 */ public static String getSessionId(HttpServletRequest request) { String sessionId = request.getHeader(SESSION_ID); if (null == sessionId) { Cookie[] cookies = request.getCookies(); if ((null != cookies) && (cookies.length > 0)) { for (Cookie cooky : cookies) { if (SESSION_ID.equals(cooky.getName())) { sessionId = cooky.getValue(); break; } } } } return sessionId; } public static String getDeviceId(HttpServletRequest request) { return request.getHeader(DEVICE_ID); } public static WebSession get() { WebContext webContext = ThreadWebContextHolder.getContext(); if (null != webContext) { return webContext.getWebSession(); } return null; } public static void set(WebSession session) { WebContext webContext = ThreadWebContextHolder.getContext(); if (null != webContext) { webContext.setWebSession(session); ThreadWebContextHolder.setContext(webContext); } } public static Long getUserId() { WebSession session = get(); return session.getUserId(); } public static Long getEmployeeId() { WebSession session = get(); return session.getEmployeeId(); } public static Long getBranchId() { WebSession session = get(); return session.getBranchId(); } public static Long getTenantId() { WebSession session = get(); return session.getTenantId(); } public static Long getDepartmentId() { WebSession session = get(); return session.getDepartmentId(); } public static boolean getFirstLogin() { WebSession session = get(); return session.getFirstLogin(); } public static String getUserCode() { WebSession session = get(); return session.getUserCode(); } public static String getSecretKey(){ WebSession session = get(); return session.getSecretKey(); } } }