Java tutorial
/* * 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.openejb.server.httpd.part; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItem; import javax.servlet.http.Part; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.util.Collection; import java.util.Collections; import java.util.Iterator; import java.util.LinkedHashSet; import java.util.Set; // highly inspired from tomcat public class CommonsFileUploadPart implements Part { private final FileItem fileItem; private final File location; public CommonsFileUploadPart(final FileItem fileItem, final File location) { this.fileItem = fileItem; this.location = location; } @Override public void delete() throws IOException { fileItem.delete(); } @Override public String getContentType() { return fileItem.getContentType(); } @Override public String getHeader(final String name) { return fileItem.getHeaders().getHeader(name); } @Override public Collection<String> getHeaderNames() { if (fileItem instanceof DiskFileItem) { final Set<String> headerNames = new LinkedHashSet<>(); final Iterator<String> iter = fileItem.getHeaders().getHeaderNames(); while (iter.hasNext()) { headerNames.add(iter.next()); } return headerNames; } return Collections.emptyList(); } @Override public Collection<String> getHeaders(final String name) { final Set<String> headers = new LinkedHashSet<>(); final Iterator<String> iter = fileItem.getHeaders().getHeaders(name); while (iter.hasNext()) { headers.add(iter.next()); } return headers; } @Override public InputStream getInputStream() throws IOException { return fileItem.getInputStream(); } @Override public String getName() { return fileItem.getFieldName(); } @Override public long getSize() { return fileItem.getSize(); } @Override public void write(final String fileName) throws IOException { File file = new File(fileName); if (!file.isAbsolute()) { file = new File(location, fileName); } try { fileItem.write(file); } catch (Exception e) { throw new IOException(e); } } public String getString(final String encoding) throws UnsupportedEncodingException { return fileItem.getString(encoding); } @Override public String getSubmittedFileName() { return fileItem.getName(); } }