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* Copyright 2004 The Apache Software Foundation
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
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package org.apache.catalina.util;
import javax.servlet.ServletOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.Reader;
public final class ResponseUtil {
/**
* Copies the contents of the specified input stream to the specified
* output stream.
*
* @param istream The input stream to read from
* @param ostream The output stream to write to
*
* @return Exception that occurred during processing, or null
*/
public static IOException copy(InputStream istream,
ServletOutputStream ostream) {
IOException exception = null;
byte buffer[] = new byte[2048];
int len;
while (true) {
try {
len = istream.read(buffer);
if (len == -1)
break;
ostream.write(buffer, 0, len);
} catch (IOException e) {
exception = e;
len = -1;
break;
}
}
return exception;
}
/**
* Copies the contents of the specified input stream to the specified
* output stream.
*
* @param reader The reader to read from
* @param writer The writer to write to
*
* @return Exception that occurred during processing, or null
*/
public static IOException copy(Reader reader, PrintWriter writer) {
IOException exception = null;
char buffer[] = new char[2048];
int len;
while (true) {
try {
len = reader.read(buffer);
if (len == -1)
break;
writer.write(buffer, 0, len);
} catch (IOException e) {
exception = e;
len = -1;
break;
}
}
return exception;
}
}