/**
* jetbrick-template
* http://subchen.github.io/jetbrick-template/
*
* Copyright 2010-2014 Guoqiang Chen. All rights reserved.
* Email: subchen@gmail.com
*
* 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 jetbrick.template.web;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import javax.servlet.ServletContext;
import jetbrick.template.JetEngine;
import jetbrick.template.resource.Resource;
import jetbrick.template.resource.loader.ResourceLoader;
import jetbrick.template.utils.PathUtils;
import jetbrick.template.utils.URLUtils;
import jetbrick.template.utils.finder.TemplateFileFinder;
/**
* 负责加载 webapp 下面的资源文件.
*
* @since 1.1.3
* @author Guoqiang Chen
*/
public class WebResourceLoader implements ResourceLoader {
private ServletContext servletContext;
private String basepath;
private String suffix;
private String encoding;
@Override
public void initialize(JetEngine engine, String basepath, String encoding) {
this.servletContext = ((JetWebEngine) engine).getServletContext();
this.basepath = PathUtils.getStandardizedTemplateRoot(basepath, false);
this.suffix = engine.getConfig().getTemplateSuffix();
this.encoding = encoding;
}
@Override
public Resource load(String name) {
String pathname = PathUtils.combinePathName(basepath, name, false);
try {
URL url = servletContext.getResource(pathname);
if (url == null) {
return null;
}
String realpath = servletContext.getRealPath(pathname);
File file = (realpath == null) ? null : new File(realpath);
return new WebResource(url, file, name, encoding);
} catch (MalformedURLException e) {
throw new RuntimeException(e);
}
}
@Override
public List<String> loadAll() {
File dir;
String realpath = servletContext.getRealPath(basepath);
if (realpath != null) {
dir = new File(realpath);
} else {
// 该死的 weblogic，以war部署的时候，无法使用 getRealPath
try {
URL url = servletContext.getResource(basepath);
if (url == null) {
throw new RuntimeException("template.path is not found in WebResourceLoader: " + basepath);
}
dir = URLUtils.toFileObject(url);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
TemplateFileFinder finder = new TemplateFileFinder(suffix);
finder.lookupFileSystem(dir, true);
return finder.getResources();
}
static class WebResource extends Resource {
private final URL url;
private final File file;
public WebResource(URL url, File file, String name, String encoding) {
super(name, encoding);
this.url = url;
this.file = file;
}
@Override
public String getAbsolutePath() {
return "webapp:" + name;
}
@Override
public long lastModified() {
return file == null ? 1L : file.lastModified();
}
@Override
public InputStream getInputStream() throws IOException {
return url.openStream();
}
}
}