| <!-- |
| 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. |
| --> |
| <!-- $Id: package.html,v 1.1 2011/06/28 21:08:18 rherrmann Exp $ --> |
| <html> |
| <head> |
| <title> |
| Overview of the org.apache.tomcat.util.http.fileupload component |
| </title> |
| </head> |
| <body> |
| <p><b>NOTE:</b> This code has been copied from commons-fileupload 1.2.1 and |
| commons-io 1.4 and package renamed to avoid clashes with any web apps that |
| may wish to use these libraries. |
| </p> |
| <p> |
| A component for handling HTML file uploads as specified by |
| <a href="http://www.ietf.org/rfc/rfc1867.txt" target="_top">RFC 1867</a>. |
| This component provides support for uploads within both servlets (JSR 53) |
| and portlets (JSR 168). |
| </p> |
| <p> |
| While this package provides the generic functionality for file uploads, |
| these classes are not typically used directly. Instead, normal usage |
| involves one of the provided extensions of |
| {@link org.apache.tomcat.util.http.fileupload.FileUpload FileUpload} such as |
| {@link org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload ServletFileUpload} |
| together with a factory for |
| {@link org.apache.tomcat.util.http.fileupload.FileItem FileItem} instances, |
| such as |
| {@link org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory DiskFileItemFactory}. |
| </p> |
| <p> |
| The following is a brief example of typical usage in a servlet, storing |
| the uploaded files on disk. |
| </p> |
| <pre> |
| public void doPost(HttpServletRequest req, HttpServletResponse res) { |
| DiskFileItemFactory factory = new DiskFileItemFactory(); |
| // maximum size that will be stored in memory |
| factory.setSizeThreshold(4096); |
| // the location for saving data that is larger than getSizeThreshold() |
| factory.setRepository(new File("/tmp")); |
| |
| ServletFileUpload upload = new ServletFileUpload(factory); |
| // maximum size before a FileUploadException will be thrown |
| upload.setSizeMax(1000000); |
| |
| List fileItems = upload.parseRequest(req); |
| // assume we know there are two files. The first file is a small |
| // text file, the second is unknown and is written to a file on |
| // the server |
| Iterator i = fileItems.iterator(); |
| String comment = ((FileItem)i.next()).getString(); |
| FileItem fi = (FileItem)i.next(); |
| // filename on the client |
| String fileName = fi.getName(); |
| // save comment and filename to database |
| ... |
| // write the file |
| fi.write(new File("/www/uploads/", fileName)); |
| } |
| </pre> |
| <p> |
| In the example above, the first file is loaded into memory as a |
| <code>String</code>. Before calling the <code>getString</code> method, |
| the data may have been in memory or on disk depending on its size. The |
| second file we assume it will be large and therefore never explicitly |
| load it into memory, though if it is less than 4096 bytes it will be |
| in memory before it is written to its final location. When writing to |
| the final location, if the data is larger than the threshold, an attempt |
| is made to rename the temporary file to the given location. If it cannot |
| be renamed, it is streamed to the new location. |
| </p> |
| <p> |
| Please see the FileUpload |
| <a href="http://commons.apache.org/fileupload/using.html" target="_top">User Guide</a> |
| for further details and examples of how to use this package. |
| </p> |
| </body> |
| </html> |