org.eclipse.jetty.util.ReadLineInputStream Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2018 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.util;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
/**
* ReadLineInputStream
*
* Read from an input stream, accepting CR/LF, LF or just CR.
*/
public class ReadLineInputStream extends BufferedInputStream
{
boolean _seenCRLF;
boolean _skipLF;
public ReadLineInputStream(InputStream in)
{
super(in);
}
public ReadLineInputStream(InputStream in, int size)
{
super(in,size);
}
public String readLine() throws IOException
{
mark(buf.length);
while (true)
{
int b=super.read();
if (markpos < 0)
throw new IOException("Buffer size exceeded: no line terminator");
if (b==-1)
{
int m=markpos;
markpos=-1;
if (pos>m)
return new String(buf,m,pos-m, StandardCharsets.UTF_8);
return null;
}
if (b=='\r')
{
int p=pos;
// if we have seen CRLF before, hungrily consume LF
if (_seenCRLF && pos0)
{
_skipLF=false;
if (_seenCRLF)
{
int b = super.read();
if (b==-1)
return -1;
if (b!='\n')
{
buf[off]=(byte)(0xff&b);
return 1+super.read(buf,off+1,len-1);
}
}
}
return super.read(buf,off,len);
}
}