| // |
| // ======================================================================== |
| // Copyright (c) 1995-2017 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 && pos<count) |
| { |
| if (buf[pos]=='\n') |
| pos+=1; |
| } |
| else |
| _skipLF=true; |
| int m=markpos; |
| markpos=-1; |
| return new String(buf,m,p-m-1,StandardCharsets.UTF_8); |
| } |
| |
| if (b=='\n') |
| { |
| if (_skipLF) |
| { |
| _skipLF=false; |
| _seenCRLF=true; |
| markpos++; |
| continue; |
| } |
| int m=markpos; |
| markpos=-1; |
| return new String(buf,m,pos-m-1,StandardCharsets.UTF_8); |
| } |
| } |
| } |
| |
| @Override |
| public synchronized int read() throws IOException |
| { |
| int b = super.read(); |
| if (_skipLF) |
| { |
| _skipLF=false; |
| if (_seenCRLF && b=='\n') |
| b=super.read(); |
| } |
| return b; |
| } |
| |
| @Override |
| public synchronized int read(byte[] buf, int off, int len) throws IOException |
| { |
| if (_skipLF && len>0) |
| { |
| _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); |
| } |
| |
| |
| } |