| /* |
| * 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.net.URI; |
| import java.nio.charset.CharsetDecoder; |
| |
| import org.apache.asyncweb.common.HttpMethod; |
| 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.ProtocolDecoderOutput; |
| import org.apache.mina.filter.codec.statemachine.ConsumeToLinearWhitespaceDecodingState; |
| import org.apache.mina.filter.codec.statemachine.CrLfDecodingState; |
| import org.apache.mina.filter.codec.statemachine.DecodingState; |
| import org.apache.mina.filter.codec.statemachine.DecodingStateMachine; |
| import org.apache.mina.filter.codec.statemachine.LinearWhitespaceSkippingState; |
| |
| /** |
| * Decodes an HTTP request line - populating an associated <code>Request</code> |
| * This decoder expects the following format: |
| * <pre> |
| * Request-Line = Method SP Request-URI SP HTTP-Version CRLF |
| * </pre> |
| * |
| * @author The Apache MINA Project (dev@mina.apache.org) |
| * @version $Rev$, $Date$ |
| */ |
| abstract class HttpRequestLineDecodingState extends DecodingStateMachine { |
| |
| private final CharsetDecoder asciiDecoder = |
| HttpCodecUtils.US_ASCII_CHARSET.newDecoder(); |
| private final CharsetDecoder defaultDecoder = |
| HttpCodecUtils.DEFAULT_CHARSET.newDecoder(); |
| |
| @Override |
| protected DecodingState init() throws Exception { |
| return READ_METHOD; |
| } |
| |
| @Override |
| protected void destroy() throws Exception { |
| } |
| |
| private final DecodingState READ_METHOD = new ConsumeToLinearWhitespaceDecodingState() { |
| @Override |
| protected DecodingState finishDecode(IoBuffer product, |
| ProtocolDecoderOutput out) throws Exception { |
| HttpMethod method = HttpMethod.valueOf(product |
| .getString(asciiDecoder)); |
| |
| if (method == null) { |
| HttpCodecUtils.throwDecoderException("Bad method", |
| HttpResponseStatus.NOT_IMPLEMENTED); |
| } |
| |
| out.write(method); |
| |
| return AFTER_READ_METHOD; |
| } |
| }; |
| |
| private final DecodingState AFTER_READ_METHOD = new LinearWhitespaceSkippingState() { |
| @Override |
| protected DecodingState finishDecode(int skippedBytes) throws Exception { |
| return READ_REQUEST_URI; |
| } |
| }; |
| |
| private final DecodingState READ_REQUEST_URI = new ConsumeToLinearWhitespaceDecodingState() { |
| @Override |
| protected DecodingState finishDecode(IoBuffer product, |
| ProtocolDecoderOutput out) throws Exception { |
| out.write(new URI(product.getString(defaultDecoder))); |
| return AFTER_READ_REQUEST_URI; |
| } |
| }; |
| |
| private final DecodingState AFTER_READ_REQUEST_URI = new LinearWhitespaceSkippingState() { |
| @Override |
| protected DecodingState finishDecode(int skippedBytes) throws Exception { |
| return READ_PROTOCOL_VERSION; |
| } |
| }; |
| |
| private final DecodingState READ_PROTOCOL_VERSION = new HttpVersionDecodingState() { |
| @Override |
| protected DecodingState finishDecode( |
| HttpVersion version, ProtocolDecoderOutput out) throws Exception { |
| out.write(version); |
| return AFTER_READ_PROTOCOL_VERSION; |
| } |
| }; |
| |
| private final DecodingState AFTER_READ_PROTOCOL_VERSION = new LinearWhitespaceSkippingState() { |
| @Override |
| protected DecodingState finishDecode(int skippedBytes) throws Exception { |
| return FINISH; |
| } |
| }; |
| |
| private final DecodingState FINISH = new CrLfDecodingState() { |
| @Override |
| protected DecodingState finishDecode(boolean foundCRLF, |
| ProtocolDecoderOutput out) throws Exception { |
| if (!foundCRLF) { |
| HttpCodecUtils |
| .throwDecoderException("Expected CR/LF at the end of the request line."); |
| } |
| |
| return null; |
| } |
| }; |
| } |