com.ineunet.knife.upload.WebPaths.java Source code

Introduction

Here is the source code for com.ineunet.knife.upload.WebPaths.java

Source

/*
 * Copyright 2013-2016 iNeunet OpenSource and the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.ineunet.knife.upload;

import javax.servlet.ServletContext;
import javax.servlet.ServletRequestEvent;
import javax.servlet.ServletRequestListener;
import javax.servlet.http.HttpServletRequest;

import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.util.WebUtils;

/**
 * ?web.xml?listener????
 * @author hilbert.wang@hotmail.com
 * @since 2.2.6
 */
public class WebPaths implements ServletRequestListener {

    private static String rootUrl;
    private static String rootPath;
    private static boolean inited = false;

    /**
     * @param request HttpServletRequest
     */
    public static void init(HttpServletRequest request) {
        if (request == null) {
            return;
        }
        if (inited)
            return;
        // init rootUrl
        String reqUrl = request.getRequestURL().toString();
        String reqUri = request.getRequestURI();
        int index = reqUrl.length() - reqUri.length();
        rootUrl = reqUrl.substring(0, index) + request.getContextPath();

        // init rootPath
        rootPath = request.getSession().getServletContext().getRealPath("/");

        // set flag
        inited = true;
    }

    public static void init(ServletContext servletContext) {
        if (servletContext == null) {
            return;
        }
        if (inited)
            return;
        // init rootPath
        rootPath = servletContext.getRealPath("/");
    }

    /**
     * @return e.g. /Workspace/iNeunet/ioo/src/main/webapp
     */
    public static String getRootPath() {
        if (rootPath == null) {
            WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();
            if (webApplicationContext == null) {
                rootPath = System.getProperty(WebUtils.DEFAULT_WEB_APP_ROOT_KEY);
            } else {
                ServletContext servletContext = webApplicationContext.getServletContext();
                rootPath = servletContext.getRealPath("/");
            }
        }
        return rootPath;
    }

    /**
     * @return e.g. http://localhost:8080/ioo
     */
    public static String getRootURL() {
        return rootUrl;
    }

    @Override
    public void requestInitialized(ServletRequestEvent requestEvent) {
        if (!(requestEvent.getServletRequest() instanceof HttpServletRequest)) {
            throw new IllegalArgumentException(
                    "Request is not an HttpServletRequest: " + requestEvent.getServletRequest());
        }
        HttpServletRequest request = (HttpServletRequest) requestEvent.getServletRequest();
        WebPaths.init(request);
    }

    @Override
    public void requestDestroyed(ServletRequestEvent requestEvent) {
    }

}