| /* |
| * 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.asyncweb.common.codec; |
| |
| import java.nio.charset.CharacterCodingException; |
| import java.nio.charset.CharsetDecoder; |
| |
| import org.apache.asyncweb.common.HttpResponseStatus; |
| import org.apache.asyncweb.common.HttpVersion; |
| import org.apache.mina.core.buffer.IoBuffer; |
| import org.apache.mina.filter.codec.ProtocolDecoderException; |
| import org.apache.mina.filter.codec.ProtocolDecoderOutput; |
| import org.apache.mina.filter.codec.statemachine.ConsumeToDynamicTerminatorDecodingState; |
| import org.apache.mina.filter.codec.statemachine.DecodingState; |
| |
| /** |
| * Decodes HTTP version. |
| * |
| * @author The Apache MINA Project (dev@mina.apache.org) |
| * @version $Rev$, $Date$ |
| */ |
| abstract class HttpVersionDecodingState implements DecodingState { |
| |
| private final CharsetDecoder asciiDecoder = HttpCodecUtils.US_ASCII_CHARSET.newDecoder(); |
| |
| private final DecodingState READ_PROTOCOL_VERSION = new ConsumeToDynamicTerminatorDecodingState() { |
| @Override |
| protected DecodingState finishDecode(IoBuffer product, |
| ProtocolDecoderOutput out) throws Exception { |
| String versionStr = null; |
| HttpVersion version = null; |
| try { |
| versionStr = product.getString(asciiDecoder); |
| version = HttpVersion.fromString(versionStr); |
| } catch (CharacterCodingException e) { |
| // Will take care down the |
| } |
| |
| if (version == null) { |
| if (versionStr != null) { |
| versionStr = product.getHexDump(); |
| } |
| |
| HttpCodecUtils.throwDecoderException( |
| "Unsupported HTTP version: " + versionStr, |
| HttpResponseStatus.HTTP_VERSION_NOT_SUPPORTED); |
| } |
| |
| return HttpVersionDecodingState.this.finishDecode(version, out); |
| } |
| |
| @Override |
| protected boolean isTerminator(byte b) { |
| return Character.isWhitespace(b); |
| } |
| }; |
| |
| public DecodingState decode(IoBuffer in, ProtocolDecoderOutput out) |
| throws Exception { |
| DecodingState nextState = READ_PROTOCOL_VERSION.decode(in, out); |
| if (nextState == READ_PROTOCOL_VERSION) { |
| return this; |
| } else { |
| return nextState; |
| } |
| } |
| |
| public DecodingState finishDecode(ProtocolDecoderOutput out) |
| throws Exception { |
| throw new ProtocolDecoderException( |
| "Unexpected end of session while waiting for a HTTP version field."); |
| } |
| |
| protected abstract DecodingState finishDecode( |
| HttpVersion version, ProtocolDecoderOutput out) throws Exception; |
| } |