| /* |
| * 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 org.apache.commons.net.telnet; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /*** |
| * |
| * <p> |
| * |
| * <p> |
| * <p> |
| * @author Daniel F. Savarese |
| ***/ |
| |
| |
| final class TelnetOutputStream extends OutputStream |
| { |
| private TelnetClient __client; |
| private boolean __convertCRtoCRLF = true; |
| private boolean __lastWasCR = false; |
| |
| TelnetOutputStream(TelnetClient client) |
| { |
| __client = client; |
| } |
| |
| |
| /*** |
| * Writes a byte to the stream. |
| * <p> |
| * @param ch The byte to write. |
| * @exception IOException If an error occurs while writing to the underlying |
| * stream. |
| ***/ |
| @Override |
| public void write(int ch) throws IOException |
| { |
| |
| synchronized (__client) |
| { |
| ch &= 0xff; |
| |
| if (__client._requestedWont(TelnetOption.BINARY)) |
| { |
| if (__lastWasCR) |
| { |
| if (__convertCRtoCRLF) |
| { |
| __client._sendByte('\n'); |
| if (ch == '\n') |
| { |
| __lastWasCR = false; |
| return ; |
| } |
| } |
| else if (ch != '\n') |
| __client._sendByte('\0'); |
| } |
| |
| __lastWasCR = false; |
| |
| switch (ch) |
| { |
| case '\r': |
| __client._sendByte('\r'); |
| __lastWasCR = true; |
| break; |
| case TelnetCommand.IAC: |
| __client._sendByte(TelnetCommand.IAC); |
| __client._sendByte(TelnetCommand.IAC); |
| break; |
| default: |
| __client._sendByte(ch); |
| break; |
| } |
| } |
| else if (ch == TelnetCommand.IAC) |
| { |
| __client._sendByte(ch); |
| __client._sendByte(TelnetCommand.IAC); |
| } |
| else |
| __client._sendByte(ch); |
| } |
| } |
| |
| |
| /*** |
| * Writes a byte array to the stream. |
| * <p> |
| * @param buffer The byte array to write. |
| * @exception IOException If an error occurs while writing to the underlying |
| * stream. |
| ***/ |
| @Override |
| public void write(byte buffer[]) throws IOException |
| { |
| write(buffer, 0, buffer.length); |
| } |
| |
| |
| /*** |
| * Writes a number of bytes from a byte array to the stream starting from |
| * a given offset. |
| * <p> |
| * @param buffer The byte array to write. |
| * @param offset The offset into the array at which to start copying data. |
| * @param length The number of bytes to write. |
| * @exception IOException If an error occurs while writing to the underlying |
| * stream. |
| ***/ |
| @Override |
| public void write(byte buffer[], int offset, int length) throws IOException |
| { |
| synchronized (__client) |
| { |
| while (length-- > 0) |
| write(buffer[offset++]); |
| } |
| } |
| |
| /*** Flushes the stream. ***/ |
| @Override |
| public void flush() throws IOException |
| { |
| __client._flushOutputStream(); |
| } |
| |
| /*** Closes the stream. ***/ |
| @Override |
| public void close() throws IOException |
| { |
| __client._closeOutputStream(); |
| } |
| } |