qc.web.util.WebUtils.java Source code

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Here is the source code for qc.web.util.WebUtils.java

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/*
 * Copyright 2010- 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 qc.web.util;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.StringUtils;

/**
 * WebUI
 * 
 * @author dragon
 * @since 1.0.0
 */
public class WebUtils {
    static Log logger = LogFactory.getLog(WebUtils.class);

    private WebUtils() {
    }

    /**
     * ?CSS?
     * @param cssPath ?CSS
     * @return CSSHTML?
     */
    public static String printCSS(String cssPath) {
        return "<link rel=\"stylesheet\" type=\"text/css\" href=\"" + cssPath + "\"/>";
    }

    /**
     * ?JS?
     * @param jsPath ?CSS
     * @return JSHTML?
     */
    public static String printJS(String jsPath) {
        return "<script type=\"text/javascript\" src=\"" + jsPath + "\"></script>";
    }

    /**
     * ???
     * 
     * <pre>
     * http://www.demo.com/demo/test.htm  -->  /demo/test.htm</span>
     * </pre>
     * 
     * @param request
     * @return ?/demo/test.htm
     */
    public static String getResourcePath(HttpServletRequest request) {
        // Adapted from VelocityViewServlet.handleRequest() method:

        // If we get here from RequestDispatcher.include(), getServletPath()
        // will return the original (wrong) URI requested. The following
        // special attribute holds the correct path. See section 8.3 of the
        // Servlet 2.3 specification.

        String path = (String) request.getAttribute("javax.servlet.include.servlet_path");

        // Also take into account the PathInfo stated on
        // SRV.4.4 Request Path Elements.
        String info = (String) request.getAttribute("javax.servlet.include.path_info");

        if (path == null) {
            path = request.getServletPath();
            info = request.getPathInfo();
        }

        if (info != null) {
            path += info;
        }

        return path;
    }

    /**js?????
     * @param fnName ?js??
     * @return 
     */
    public static String wrapJSFunction(String fnName) {
        return "function(){return window['" + fnName + "'].apply(this,arguments);}";
    }

    public static String wrapJSFunctionWithVar(String fnName, String varName) {
        if (!StringUtils.hasLength(varName))
            return "function(){return window['" + fnName + "'].apply(this,arguments);}";
        else
            return "function(){this.pvar='" + varName + "';return window['" + fnName + "'].apply(this,arguments);}";
    }

    /**????????
     * @param request
     * @param srcFileName ??
     * @return ????
     */
    public static String encodeFileName(HttpServletRequest request, String srcFileName) {
        String _fileName;
        // ???
        boolean isIE = request.getHeader("User-Agent").toUpperCase().indexOf("MSIE") != -1;
        try {
            if (isIE) {// IE?
                _fileName = URLEncoder.encode(srcFileName, "UTF-8");
                if (_fileName.length() > 150) {
                    // URLEncoder?17IE6 IEbug??KB816868
                    // ?????ie6 sp1
                    String guessCharset = "gb2312"; //?requestlocale???gb2312
                    _fileName = new String(srcFileName.getBytes(guessCharset), "ISO8859-1");
                }
            } else {// ?IE?:?URLEncoder.encode???url?
                _fileName = new String(srcFileName.getBytes("UTF-8"), "ISO8859-1");
            }
        } catch (UnsupportedEncodingException e) {
            logger.warn(e.getMessage());
            _fileName = srcFileName;
        }
        return _fileName;
    }
}