/*
|
* 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 de.uhilger.neon.up;
|
|
import java.io.ByteArrayOutputStream;
|
import java.io.IOException;
|
import java.io.InputStream;
|
import java.io.OutputStream;
|
|
//import org.apache.commons.fileupload.InvalidFileNameException;
|
//import org.apache.commons.io.IOUtils;
|
|
/**
|
* Der Lowlevel MultipartParser aus dem Projekt Apache Commons Fileupload
|
* ohne Abhaengigkeiten zum Rest von Commons Fileupload und Commons IO.
|
*
|
* Utility class for working with streams.
|
*/
|
public final class Streams {
|
|
/**
|
* Private constructor, to prevent instantiation.
|
* This class has only static methods.
|
*/
|
private Streams() {
|
// Does nothing
|
}
|
|
/**
|
* Default buffer size for use in
|
* {@link #copy(InputStream, OutputStream, boolean)}.
|
*/
|
private static final int DEFAULT_BUFFER_SIZE = 8192;
|
|
/**
|
* Copies the contents of the given {@link InputStream}
|
* to the given {@link OutputStream}. Shortcut for
|
* <pre>
|
* copy(pInputStream, pOutputStream, new byte[8192]);
|
* </pre>
|
*
|
* @param inputStream The input stream, which is being read.
|
* It is guaranteed, that {@link InputStream#close()} is called
|
* on the stream.
|
* @param outputStream The output stream, to which data should
|
* be written. May be null, in which case the input streams
|
* contents are simply discarded.
|
* @param closeOutputStream True guarantees, that {@link OutputStream#close()}
|
* is called on the stream. False indicates, that only
|
* {@link OutputStream#flush()} should be called finally.
|
*
|
* @return Number of bytes, which have been copied.
|
* @throws IOException An I/O error occurred.
|
*/
|
public static long copy(InputStream inputStream, OutputStream outputStream, boolean closeOutputStream)
|
throws IOException {
|
return copy(inputStream, outputStream, closeOutputStream, new byte[DEFAULT_BUFFER_SIZE]);
|
}
|
|
/**
|
* Copies the contents of the given {@link InputStream}
|
* to the given {@link OutputStream}.
|
*
|
* @param inputStream The input stream, which is being read.
|
* It is guaranteed, that {@link InputStream#close()} is called
|
* on the stream.
|
* @param outputStream The output stream, to which data should
|
* be written. May be null, in which case the input streams
|
* contents are simply discarded.
|
* @param closeOutputStream True guarantees, that {@link OutputStream#close()}
|
* is called on the stream. False indicates, that only
|
* {@link OutputStream#flush()} should be called finally.
|
* @param buffer Temporary buffer, which is to be used for
|
* copying data.
|
* @return Number of bytes, which have been copied.
|
* @throws IOException An I/O error occurred.
|
*/
|
public static long copy(InputStream inputStream,
|
OutputStream outputStream, boolean closeOutputStream,
|
byte[] buffer)
|
throws IOException {
|
OutputStream out = outputStream;
|
InputStream in = inputStream;
|
try {
|
long total = 0;
|
for (;;) {
|
int res = in.read(buffer);
|
if (res == -1) {
|
break;
|
}
|
if (res > 0) {
|
total += res;
|
if (out != null) {
|
out.write(buffer, 0, res);
|
}
|
}
|
}
|
if (out != null) {
|
if (closeOutputStream) {
|
out.close();
|
} else {
|
out.flush();
|
}
|
out = null;
|
}
|
in.close();
|
in = null;
|
return total;
|
} finally {
|
closeAlmostQuietly((Closeable) in);
|
if (closeOutputStream) {
|
closeAlmostQuietly((Closeable) out);
|
}
|
}
|
}
|
|
public static void closeAlmostQuietly(Closeable closeable) {
|
if (closeable != null) {
|
try {
|
closeable.close();
|
} catch (final IOException e) {
|
//logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
|
e.printStackTrace();
|
}
|
}
|
}
|
|
/**
|
* This convenience method allows to read a
|
* org.apache.commons.fileupload.FileItemStream's
|
* content into a string. The platform's default character encoding
|
* is used for converting bytes into characters.
|
*
|
* @param inputStream The input stream to read.
|
* @see #asString(InputStream, String)
|
* @return The streams contents, as a string.
|
* @throws IOException An I/O error occurred.
|
*/
|
public static String asString(InputStream inputStream) throws IOException {
|
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
copy(inputStream, baos, true);
|
return baos.toString();
|
}
|
|
/**
|
* This convenience method allows to read a
|
* org.apache.commons.fileupload.FileItemStream's
|
* content into a string, using the given character encoding.
|
*
|
* @param inputStream The input stream to read.
|
* @param encoding The character encoding, typically "UTF-8".
|
* @see #asString(InputStream)
|
* @return The streams contents, as a string.
|
* @throws IOException An I/O error occurred.
|
*/
|
public static String asString(InputStream inputStream, String encoding) throws IOException {
|
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
copy(inputStream, baos, true);
|
return baos.toString(encoding);
|
}
|
|
/**
|
* Checks, whether the given file name is valid in the sense,
|
* that it doesn't contain any NUL characters. If the file name
|
* is valid, it will be returned without any modifications. Otherwise,
|
* an InvalidFileNameException is raised.
|
*
|
* @param fileName The file name to check
|
* @return Unmodified file name, if valid.
|
* @throws Exception The file name was found to be invalid.
|
*/
|
public static String checkFileName(String fileName) throws Exception {
|
if (fileName != null && fileName.indexOf('\u0000') != -1) {
|
// pFileName.replace("\u0000", "\\0")
|
final StringBuilder sb = new StringBuilder();
|
for (int i = 0; i < fileName.length(); i++) {
|
char c = fileName.charAt(i);
|
switch (c) {
|
case 0:
|
sb.append("\\0");
|
break;
|
default:
|
sb.append(c);
|
break;
|
}
|
}
|
throw new Exception(fileName + ", Invalid file name: " + sb.toString());
|
}
|
return fileName;
|
}
|
|
}
|
