| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.asyncweb.examples.file; |
| |
| import java.io.File; |
| import java.io.FilenameFilter; |
| import java.io.RandomAccessFile; |
| import java.net.URI; |
| import java.nio.channels.FileChannel; |
| import java.security.InvalidParameterException; |
| import java.util.regex.Pattern; |
| |
| import org.apache.asyncweb.common.DefaultHttpResponse; |
| import org.apache.asyncweb.common.HttpResponseStatus; |
| import org.apache.asyncweb.common.MutableHttpResponse; |
| import org.apache.asyncweb.examples.file.cache.CachingPolicy; |
| import org.apache.asyncweb.examples.file.cache.SimpleCachingPolicy; |
| import org.apache.asyncweb.examples.file.index.DefaultDirectoryIndexGenerator; |
| import org.apache.asyncweb.examples.file.index.DirectoryIndexGenerator; |
| import org.apache.asyncweb.examples.file.mimetype.MimeMap; |
| import org.apache.asyncweb.server.HttpService; |
| import org.apache.asyncweb.server.HttpServiceContext; |
| import org.apache.mina.common.IoBuffer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * An HTTP service, serving files from the filesystem. |
| * @author The Apache MINA Project (dev@mina.apache.org) |
| * |
| */ |
| public class FileHttpService implements HttpService { |
| private static final Logger LOG = LoggerFactory |
| .getLogger(FileHttpService.class); |
| |
| private String baseUrl; |
| |
| private String basePath; |
| |
| private CachingPolicy cachingPolicy = null; |
| |
| private MimeMap mimeMap = new MimeMap(); |
| |
| private FilenameFilter indexFileFilter; |
| |
| private DirectoryIndexGenerator indexGenerator = new DefaultDirectoryIndexGenerator(); |
| |
| public FileHttpService(String baseUrl, String basePath, String directoryIndexPattern) { |
| this.baseUrl = baseUrl; |
| this.basePath = basePath; |
| this.indexFileFilter = new RegExpFilenameFilter( Pattern.compile(directoryIndexPattern)); |
| |
| if (baseUrl == null || basePath == null) |
| throw new InvalidParameterException("Null parameters"); |
| File f = new File(basePath); |
| if (!(f.isDirectory() && f.exists())) |
| throw new InvalidParameterException("The base path [ " + basePath |
| + " ] is not a valid path."); |
| cachingPolicy = new SimpleCachingPolicy(); |
| } |
| |
| public FileHttpService(String baseUrl, String basePath) { |
| this(baseUrl, basePath, "index.html"); |
| } |
| |
| public void handleRequest(HttpServiceContext context) throws Exception { |
| URI uri = context.getRequest().getRequestUri(); |
| String path = uri.getPath(); |
| LOG.info("Handling file request : [ " + uri+" ] from [ "+context.getRemoteAddress()+" ]"); |
| if (!path.startsWith(baseUrl)) { |
| // error the requested URL is not in the base URL |
| //TODO : find the good exception to throw |
| throw new InvalidParameterException("Wrong URL"); |
| } |
| |
| MutableHttpResponse response = new DefaultHttpResponse(); |
| |
| path = path.substring(baseUrl.length()); |
| File f = new File(basePath + File.separator + path); |
| |
| if (f.exists() && ( indexGenerator!=null ||!f.isDirectory() ) ) { |
| |
| if (f.isDirectory()) { |
| // search for index file |
| String[] indexes=f.list(indexFileFilter); |
| if(indexes.length==0) { |
| if(indexGenerator!=null) { |
| IoBuffer indexResponse = indexGenerator.generateIndex(f); |
| indexResponse.flip(); |
| response.setContent(indexResponse); |
| response.setHeader("Content-Type","text/html"); |
| response.setStatus(HttpResponseStatus.OK); |
| context.commitResponse(response); |
| return; |
| } |
| } else |
| f=new File(f.getAbsolutePath()+File.separator+indexes[0]); |
| } |
| |
| LOG.info("Serving file [ " + f.getAbsolutePath() + " ]"); |
| |
| // caching processing |
| if (cachingPolicy == null |
| || !cachingPolicy.isCacheable(f, context.getRequest())) { |
| response.setHeader("Pragma", "no-cache"); |
| response.setHeader("Cache-Control", "no-cache"); |
| } else { |
| cachingPolicy.testAndSetCacheHit(f, context.getRequest(), |
| response); |
| } |
| |
| // setting mime-type based on the mime-map |
| |
| String contentType = mimeMap.getContentType(MimeMap.getExtension(f |
| .getName())); |
| |
| if (contentType != null) |
| response.setHeader("Content-Type", contentType); |
| |
| response.setStatus(HttpResponseStatus.OK); |
| |
| FileChannel fileChannel = (new RandomAccessFile(f, "r")) |
| .getChannel(); |
| |
| // TODO : well it's quite explosive on big files, need to change the API |
| |
| int fileSize = (int) fileChannel.size(); |
| IoBuffer responseBuffer = IoBuffer.allocate(fileSize); |
| |
| fileChannel.read(responseBuffer.buf()); |
| fileChannel.close(); |
| |
| responseBuffer.flip(); |
| response.setContent(responseBuffer); |
| |
| } else { |
| // the file is not found, we send the famous 404 error |
| response.setStatus(HttpResponseStatus.NOT_FOUND); |
| response.setStatusReasonPhrase("File \"" + path + "\""); |
| LOG.warn("The file [ " + f.getAbsolutePath() + " ] is not found"); |
| } |
| context.commitResponse(response); |
| |
| } |
| |
| public CachingPolicy getCachingPolicy() { |
| return cachingPolicy; |
| } |
| |
| public void setCachingPolicy(CachingPolicy cachingPolicy) { |
| this.cachingPolicy = cachingPolicy; |
| } |
| |
| public void start() { |
| // nothing to do there |
| } |
| |
| public void stop() { |
| // nothing to do there |
| } |
| |
| private class RegExpFilenameFilter implements FilenameFilter { |
| private Pattern pattern; |
| |
| public RegExpFilenameFilter(Pattern pattern) { |
| this.pattern=pattern; |
| } |
| |
| public boolean accept(File dir, String name) { |
| return pattern.matcher(name).matches(); |
| } |
| |
| } |
| } |