pageservice.java

AJAX的一个好东西哦,国人的一个AJAX的实现不错的东西

/*
 * Copyright 2002-2004 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.
 * 
 * $Id: PageService.java 43 2005-12-12 01:24:50Z michael $
 */ 
package net.buffalo.demo.page;

import java.io.File;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import net.buffalo.server.BuffaloService;

/**
 * @author michael
 *
 */
public class PageService extends BuffaloService {
    
	private static final Log LOG = LogFactory.getLog(PageService.class);
	
    /**
     * load a page from specified url
     * @param page
     * @return
     * @throws IOException
     */
    public Page loadPage(String page) throws IOException {
        
    	LOG.debug("loading page: " + page);
    	
    	String path = null;
    	path = getContext().getRealPath("/pages/"+page);
    	
        File f = new File(path);
        
        if (!f.exists()) {
            page = "<font color='red'>File " + path + " not found.</font>";
            return new Page(null, page);
        }
        
        String totalPage = PageUtil.loadFile(path);
        
        Page p = new Page(PageUtil.extractScript(totalPage), 
                PageUtil.extractHtml(totalPage));
        
        return p;
    }
}