/*
* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//httpclient/src/java/org/apache/commons/httpclient/methods/multipart/FilePart.java,v 1.19 2004/04/18 23:51:37 jsdever Exp $
* $Revision: 480424 $
* $Date: 2006-11-29 06:56:49 +0100 (Wed, 29 Nov 2006) $
*
* ====================================================================
*
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*
*/
package com.android.internal.http.multipart;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.http.util.EncodingUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* This class implements a part of a Multipart post object that
* consists of a file.
*
* @author Matthew Albright
* @author Jeff Dever
* @author Adrian Sutton
* @author Michael Becke
* @author Mark Diggory
* @author Mike Bowler
* @author Oleg Kalnichevski
*
* @since 2.0
*
*/
public class FilePart extends PartBase {
/** Default content encoding of file attachments. */
public static final String DEFAULT_CONTENT_TYPE = "application/octet-stream";
/** Default charset of file attachments. */
public static final String DEFAULT_CHARSET = "ISO-8859-1";
/** Default transfer encoding of file attachments. */
public static final String DEFAULT_TRANSFER_ENCODING = "binary";
/** Log object for this class. */
private static final Log LOG = LogFactory.getLog(FilePart.class);
/** Attachment's file name */
protected static final String FILE_NAME = "; filename=";
/** Attachment's file name as a byte array */
private static final byte[] FILE_NAME_BYTES =
EncodingUtils.getAsciiBytes(FILE_NAME);
/** Source of the file part. */
private PartSource source;
/**
* FilePart Constructor.
*
* @param name the name for this part
* @param partSource the source for this part
* @param contentType the content type for this part, if null the
* {@link #DEFAULT_CONTENT_TYPE default} is used
* @param charset the charset encoding for this part, if null the
* {@link #DEFAULT_CHARSET default} is used
*/
public FilePart(String name, PartSource partSource, String contentType, String charset) {
super(
name,
contentType == null ? DEFAULT_CONTENT_TYPE : contentType,
charset == null ? "ISO-8859-1" : charset,
DEFAULT_TRANSFER_ENCODING
);
if (partSource == null) {
throw new IllegalArgumentException("Source may not be null");
}
this.source = partSource;
}
/**
* FilePart Constructor.
*
* @param name the name for this part
* @param partSource the source for this part
*/
public FilePart(String name, PartSource partSource) {
this(name, partSource, null, null);
}
/**
* FilePart Constructor.
*
* @param name the name of the file part
* @param file the file to post
*
* @throws FileNotFoundException if the file is not a normal
* file or if it is not readable.
*/
public FilePart(String name, File file)
throws FileNotFoundException {
this(name, new FilePartSource(file), null, null);
}
/**
* FilePart Constructor.
*
* @param name the name of the file part
* @param file the file to post
* @param contentType the content type for this part, if null the
* {@link #DEFAULT_CONTENT_TYPE default} is used
* @param charset the charset encoding for this part, if null the
* {@link #DEFAULT_CHARSET default} is used
*
* @throws FileNotFoundException if the file is not a normal
* file or if it is not readable.
*/
public FilePart(String name, File file, String contentType, String charset)
throws FileNotFoundException {
this(name, new FilePartSource(file), contentType, charset);
}
/**
* FilePart Constructor.
*
* @param name the name of the file part
* @param fileName the file name
* @param file the file to post
*
* @throws FileNotFoundException if the file is not a normal
* file or if it is not readable.
*/
public FilePart(String name, String fileName, File file)
throws FileNotFoundException {
this(name, new FilePartSource(fileName, file), null, null);
}
/**
* FilePart Constructor.
*
* @param name the name of the file part
* @param fileName the file name
* @param file the file to post
* @param contentType the content type for this part, if null the
* {@link #DEFAULT_CONTENT_TYPE default} is used
* @param charset the charset encoding for this part, if null the
* {@link #DEFAULT_CHARSET default} is used
*
* @throws FileNotFoundException if the file is not a normal
* file or if it is not readable.
*/
public FilePart(String name, String fileName, File file, String contentType, String charset)
throws FileNotFoundException {
this(name, new FilePartSource(fileName, file), contentType, charset);
}
/**
* Write the disposition header to the output stream
* @param out The output stream
* @throws IOException If an IO problem occurs
* @see Part#sendDispositionHeader(OutputStream)
*/
@Override
protected void sendDispositionHeader(OutputStream out)
throws IOException {
LOG.trace("enter sendDispositionHeader(OutputStream out)");
super.sendDispositionHeader(out);
String filename = this.source.getFileName();
if (filename != null) {
out.write(FILE_NAME_BYTES);
out.write(QUOTE_BYTES);
out.write(EncodingUtils.getAsciiBytes(filename));
out.write(QUOTE_BYTES);
}
}
/**
* Write the data in "source" to the specified stream.
* @param out The output stream.
* @throws IOException if an IO problem occurs.
* @see Part#sendData(OutputStream)
*/
@Override
protected void sendData(OutputStream out) throws IOException {
LOG.trace("enter sendData(OutputStream out)");
if (lengthOfData() == 0) {
// this file contains no data, so there is nothing to send.
// we don't want to create a zero length buffer as this will
// cause an infinite loop when reading.
LOG.debug("No data to send.");
return;
}
byte[] tmp = new byte[4096];
InputStream instream = source.createInputStream();
try {
int len;
while ((len = instream.read(tmp)) >= 0) {
out.write(tmp, 0, len);
}
} finally {
// we're done with the stream, close it
instream.close();
}
}
/**
* Returns the source of the file part.
*
* @return The source.
*/
protected PartSource getSource() {
LOG.trace("enter getSource()");
return this.source;
}
/**
* Return the length of the data.
* @return The length.
* @see Part#lengthOfData()
*/
@Override
protected long lengthOfData() {
LOG.trace("enter lengthOfData()");
return source.getLength();
}
}