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/**
* Copyright 2008 biaoping.yin
*
* 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 org.frameworkset.web.multipart.commons;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;
import org.apache.commons.fileupload.disk.DiskFileItem;
import org.apache.commons.io.output.DeferredFileOutputStream;
import org.frameworkset.web.multipart.IgnoreFieldNameMultipartFile;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.frameworkset.util.FileUtil;
/**
* OctetstreamMultipartFile.java
* Description:
* bboss workgroup
* Copyright (c) 2009
*
* @Date 2012-5-14 下午5:49:16
* @author biaoping.yin
* @version 1.0
*/
public class OctetstreamMultipartFile implements IgnoreFieldNameMultipartFile, Serializable {
protected final static Logger logger = LoggerFactory.getLogger(CommonsMultipartFile.class);
// private final File fileItem;
private final long size;
private String filedName;
private String origineFileName;
private String contentType;
/**
* Output stream for this item.
*/
private transient DeferredFileOutputStream dfos;
/**
* The temporary file to use.
*/
private transient File tempFile;
/**
* Create an instance wrapping the given FileItem.
* @param fileItem the FileItem to wrap
* @throws IOException
*/
public OctetstreamMultipartFile(String filedName,String contentType,int size,File repository,int sizeThreshold,String origineFileName) throws IOException {
this.repository = repository;
this.sizeThreshold = sizeThreshold;
this.size = size;
this.filedName = filedName;
this.origineFileName = origineFileName;
// getOutputStream();
// this.fileItem = this.dfos.getFile();
}
/**
* Removes the file contents from the temporary storage.
*/
protected void finalize() {
File outputFile = dfos.getFile();
if (outputFile != null && outputFile.exists()) {
outputFile.delete();
}
}
/**
* Return the underlying org.apache.commons.fileupload.FileItem
* instance. There is hardly any need to access this.
*/
public final File getFileItem() {
return this.tempFile;
}
public String getName() {
return filedName;
}
public String getOriginalFilename() {
String filename = origineFileName;
if (filename == null) {
// Should never happen.
return "";
}
// check for Unix-style path
int pos = filename.lastIndexOf("/");
if (pos == -1) {
// check for Windows-style path
pos = filename.lastIndexOf("\\");
}
if (pos != -1) {
// any sort of path separator found
return filename.substring(pos + 1);
}
else {
// plain name
return filename;
}
}
public String getContentType() {
return contentType;
}
public boolean isEmpty() {
return (this.size == 0);
}
public long getSize() {
return this.size;
}
/**
* Counter used in unique identifier generation.
*/
private static int counter = 0;
/**
* Returns an identifier that is unique within the class loader used to
* load this class, but does not have random-like apearance.
*
* @return A String with the non-random looking instance identifier.
*/
private static String getUniqueId() {
final int limit = 100000000;
int current;
synchronized (DiskFileItem.class) {
current = counter++;
}
String id = Integer.toString(current);
// If you manage to get more than 100 million of ids, you'll
// start getting ids longer than 8 characters.
if (current < limit) {
id = ("00000000" + id).substring(id.length());
}
return id;
}
private File repository;
private int sizeThreshold;
/**
* UID used in unique file name generation.
*/
private static final String UID =
new java.rmi.server.UID().toString()
.replace(':', '_').replace('-', '_');
/**
* Creates and returns a {@link java.io.File File} representing a uniquely
* named temporary file in the configured repository path. The lifetime of
* the file is tied to the lifetime of the FileItem instance;
* the file will be deleted when the instance is garbage collected.
*
* @return The {@link java.io.File File} to be used for temporary storage.
*/
protected File getTempFile() {
if (tempFile == null) {
File tempDir = repository;
if (tempDir == null) {
tempDir = new File(System.getProperty("java.io.tmpdir"));
}
String tempFileName =
"upload_" + UID + "_" + getUniqueId() + ".tmp";
tempFile = new File(tempDir, tempFileName);
}
return tempFile;
}
/**
* Returns an {@link java.io.OutputStream OutputStream} that can
* be used for storing the contents of the file.
*
* @return An {@link java.io.OutputStream OutputStream} that can be used
* for storing the contensts of the file.
*
* @throws IOException if an error occurs.
*/
public OutputStream getOutputStream()
throws IOException {
if (dfos == null) {
File outputFile = getTempFile();
dfos = new DeferredFileOutputStream(sizeThreshold, outputFile);
}
return dfos;
}
public byte[] getBytes() {
if (!isAvailable()) {
throw new IllegalStateException("File has been moved - cannot be read again");
}
if(cachedContent != null)
return cachedContent;
byte[] fileData = new byte[(int) getSize()];
FileInputStream fis = null;
try {
fis = new FileInputStream(dfos.getFile());
fis.read(fileData);
} catch (IOException e) {
fileData = null;
} finally {
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
// ignore
}
}
}
return fileData;
}
// public InputStream getInputStream() throws IOException {
// if (!isAvailable()) {
// throw new IllegalStateException("File has been moved - cannot be read again");
// }
// InputStream inputStream = this.fileItem != null && this.fileItem.exists()?new java.io.FileInputStream(this.fileItem):null;
// return (inputStream != null ? inputStream : new ByteArrayInputStream(new byte[0]));
// }
/**
* Cached contents of the file.
*/
private byte[] cachedContent;
/**
* Provides a hint as to whether or not the file contents will be read
* from memory.
*
* @return true if the file contents will be read
* from memory; false otherwise.
*/
public boolean isInMemory() {
if (cachedContent != null) {
return true;
}
return dfos.isInMemory();
}
/**
* Returns an {@link java.io.InputStream InputStream} that can be
* used to retrieve the contents of the file.
*
* @return An {@link java.io.InputStream InputStream} that can be
* used to retrieve the contents of the file.
*
* @throws IOException if an error occurs.
*/
public InputStream getInputStream()
throws IOException {
if (!isAvailable()) {
throw new IllegalStateException("File has been moved - cannot be read again");
}
if (!isInMemory()) {
return new FileInputStream(dfos.getFile());
}
if (cachedContent == null) {
cachedContent = dfos.getData();
}
return new ByteArrayInputStream(cachedContent);
}
public void transferTo(File dest) throws IOException, IllegalStateException {
if (!isAvailable()) {
throw new IllegalStateException("File has already been moved - cannot be transferred again");
}
if (dest.exists() && !dest.delete()) {
throw new IOException(
"Destination file [" + dest.getAbsolutePath() + "] already exists and could not be deleted");
}
try {
FileUtil.fileCopy(this.tempFile, dest);
this.tempFile.delete();
{
logger.debug("Multipart file '" + getName() + "' with original filename [" +
getOriginalFilename() + "], stored " + getStorageDescription() + ": " +
"move to [" + dest.getAbsolutePath() + "]");
}
}
catch (Exception ex) {
logger.error("Could not transfer to file", ex);
// throw new IllegalStateException(ex.getMessage());
throw new IOException("Could not transfer to file: " + ex.getMessage());
}
// catch (IOException ex) {
// throw ex;
// }
// catch (Exception ex) {
// logger.error("Could not transfer to file", ex);
// throw new IOException("Could not transfer to file: " + ex.getMessage());
// }
}
/**
* Determine whether the multipart content is still available.
* If a temporary file has been moved, the content is no longer available.
*/
protected boolean isAvailable() {
// Check whether current file size is different than original one.
return this.tempFile.exists() && (this.tempFile.length() == this.size);
}
/**
* Return a description for the storage location of the multipart content.
* Tries to be as specific as possible: mentions the file location in case
* of a temporary file.
*/
public String getStorageDescription() {
{
return "on disk";
}
}
@Override
public void destroy() {
this.cachedContent = null;
if (this.tempFile != null && this.tempFile.exists()) {
this.tempFile.delete();
}
}
}
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