/*
* Copyright 2014 The Netty Project
*
* The Netty Project 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 io.netty.handler.codec.spdy;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
abstract class SpdyHeaderBlockDecoder {
static SpdyHeaderBlockDecoder newInstance(SpdyVersion spdyVersion, int maxHeaderSize) {
return new SpdyHeaderBlockZlibDecoder(spdyVersion, maxHeaderSize);
}
/**
* Decodes a SPDY Header Block, adding the Name/Value pairs to the given Headers frame.
* If the header block is malformed, the Headers frame will be marked as invalid.
* A stream error with status code PROTOCOL_ERROR must be issued in response to an invalid frame.
*
* @param alloc the {@link ByteBufAllocator} which can be used to allocate new {@link ByteBuf}s
* @param headerBlock the HeaderBlock to decode
* @param frame the Headers frame that receives the Name/Value pairs
* @throws Exception If the header block is malformed in a way that prevents any future
* decoding of any other header blocks, an exception will be thrown.
* A session error with status code PROTOCOL_ERROR must be issued.
*/
abstract void decode(ByteBufAllocator alloc, ByteBuf headerBlock, SpdyHeadersFrame frame) throws Exception;
abstract void endHeaderBlock(SpdyHeadersFrame frame) throws Exception;
abstract void end();
}