| /**************************************************************** |
| * 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.james.imap.decode; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.james.imap.api.display.HumanReadableText; |
| import org.apache.james.imap.message.BytesBackedLiteral; |
| import org.apache.james.imap.message.Literal; |
| import org.apache.james.imap.utils.EolInputStream; |
| |
| import com.google.common.io.ByteStreams; |
| |
| /** |
| * {@link ImapRequestLineReader} which use normal IO Streaming |
| */ |
| public class ImapRequestStreamLineReader extends ImapRequestLineReader implements Closeable { |
| private final InputStream input; |
| private final OutputStream output; |
| |
| public ImapRequestStreamLineReader(InputStream input, OutputStream output) { |
| this.input = input; |
| this.output = output; |
| } |
| |
| /** |
| * Reads the next character in the current line. This method will continue |
| * to return the same character until the {@link #consume()} method is |
| * called. |
| * |
| * @return The next character TODO: character encoding is variable and |
| * cannot be determine at the token level; this char is not accurate |
| * reported; should be an octet |
| * @throws DecodingException |
| * If the end-of-stream is reached. |
| */ |
| @Override |
| public char nextChar() throws DecodingException { |
| if (!nextSeen) { |
| int next = -1; |
| |
| try { |
| next = input.read(); |
| } catch (IOException e) { |
| throw new DecodingException(HumanReadableText.SOCKET_IO_FAILURE, "Error reading from stream.", e); |
| } |
| if (next == -1) { |
| throw new DecodingException(HumanReadableText.ILLEGAL_ARGUMENTS, "Unexpected end of stream."); |
| } |
| |
| nextSeen = true; |
| nextChar = (char) next; |
| } |
| return nextChar; |
| } |
| |
| @Override |
| public Literal read(int size, boolean extraCRLF) throws IOException { |
| |
| // Unset the next char. |
| nextSeen = false; |
| nextChar = 0; |
| InputStream limited = ByteStreams.limit(input, size); |
| |
| if (extraCRLF) { |
| return BytesBackedLiteral.copy(new EolInputStream(this, limited), size); |
| } else { |
| return BytesBackedLiteral.copy(limited, size); |
| } |
| } |
| |
| /** |
| * Sends a server command continuation request '+' back to the client, |
| * requesting more data to be sent. |
| */ |
| @Override |
| protected void commandContinuationRequest() throws DecodingException { |
| try { |
| output.write("+ Ok".getBytes()); |
| output.write('\r'); |
| output.write('\n'); |
| output.flush(); |
| } catch (IOException e) { |
| throw new DecodingException(HumanReadableText.SOCKET_IO_FAILURE, "Unexpected exception in sending command continuation request.", e); |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| try { |
| input.close(); |
| } finally { |
| output.close(); |
| } |
| } |
| } |