| /* |
| * 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.CharsetDecoder; |
| import java.util.ArrayList; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.mina.core.buffer.IoBuffer; |
| import org.apache.mina.filter.codec.ProtocolDecoderOutput; |
| import org.apache.mina.filter.codec.statemachine.ConsumeToCrLfDecodingState; |
| import org.apache.mina.filter.codec.statemachine.ConsumeToTerminatorDecodingState; |
| 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 the Headers of HTTP requests. |
| * <code>HttpHeaderDecoder</code> employs several sub-decoders - each taking |
| * the responsibility of decoding a specific part of the header.<br/> |
| * |
| * @author The Apache MINA Project (dev@mina.apache.org) |
| */ |
| abstract class HttpHeaderDecodingState extends DecodingStateMachine { |
| |
| private final CharsetDecoder asciiDecoder = |
| HttpCodecUtils.US_ASCII_CHARSET.newDecoder(); |
| private final CharsetDecoder defaultDecoder = |
| HttpCodecUtils.DEFAULT_CHARSET.newDecoder(); |
| |
| private Map<String, List<String>> headers; |
| private String lastHeaderName; |
| private StringBuilder lastHeaderValue; |
| |
| HttpHeaderDecodingState() { |
| //cookieParser = new CookieParser(); |
| } |
| |
| @Override |
| protected DecodingState init() throws Exception { |
| headers = new LinkedHashMap<String, List<String>>(); |
| return FIND_EMPTY_LINE; |
| } |
| |
| @Override |
| protected void destroy() throws Exception { |
| headers = null; |
| lastHeaderName = null; |
| lastHeaderValue = null; |
| } |
| |
| private final DecodingState FIND_EMPTY_LINE = new CrLfDecodingState() { |
| @Override |
| protected DecodingState finishDecode(boolean foundCRLF, |
| ProtocolDecoderOutput out) throws Exception { |
| if (foundCRLF) { |
| out.write(headers); |
| return null; |
| } else { |
| return READ_HEADER_NAME; |
| } |
| } |
| }; |
| |
| private final DecodingState READ_HEADER_NAME = |
| new ConsumeToTerminatorDecodingState((byte) ':') { |
| @Override |
| protected DecodingState finishDecode(IoBuffer product, |
| ProtocolDecoderOutput out) throws Exception { |
| lastHeaderName = product.getString(asciiDecoder); |
| return AFTER_READ_HEADER_NAME; |
| } |
| }; |
| |
| private final DecodingState AFTER_READ_HEADER_NAME = new LinearWhitespaceSkippingState() { |
| @Override |
| protected DecodingState finishDecode(int skippedBytes) throws Exception { |
| lastHeaderValue = new StringBuilder(); |
| return READ_HEADER_VALUE; |
| } |
| }; |
| |
| private final DecodingState READ_HEADER_VALUE = new ConsumeToCrLfDecodingState() { |
| @Override |
| protected DecodingState finishDecode(IoBuffer product, |
| ProtocolDecoderOutput out) throws Exception { |
| String value = product.getString(defaultDecoder); |
| if (lastHeaderValue.length() == 0) { |
| lastHeaderValue.append(value); |
| } else { |
| lastHeaderValue.append(' '); |
| lastHeaderValue.append(value); |
| } |
| return AFTER_READ_HEADER_VALUE; |
| } |
| }; |
| |
| private final DecodingState AFTER_READ_HEADER_VALUE = new LinearWhitespaceSkippingState() { |
| @Override |
| protected DecodingState finishDecode(int skippedBytes) throws Exception { |
| if (skippedBytes == 0) { |
| List<String> values = headers.get(lastHeaderName); |
| if (values == null) { |
| values = new ArrayList<String>(); |
| headers.put(lastHeaderName, values); |
| } |
| values.add(lastHeaderValue.toString()); |
| return FIND_EMPTY_LINE; |
| } else { |
| return READ_HEADER_VALUE; |
| } |
| } |
| }; |
| } |