e24a5d8839
Motivation: This allows using handlers for Streams in normal Netty-style. Frames are read/written to the channel as messages, not directly as a callback/method call. Handlers allow mixing and can ease HTTP/1 and HTTP/2 interoperability by eventually supporting HTTP/1 handlers in HTTP/2 and vise versa. Modifications: New handler Http2MultiplexCodec that converts from the current HTTP/2 API to a message-based API and child channels for streams. Result: The basics are done for server-side: new streams trigger creation of new channels in much the same appearance to how new connections trigger new channel creation. The basic frames HEADERS and DATA are handled, but also GOAWAY and RST_STREAM. Inbound flow control is implemented, but outbound is not. That will be done later, along with not completing write promises on the child channel until the write actually completes on the parent. There is not yet support for outbound priority/weight, push promises, and many other features. There is a generic Object that may be set on stream frames. This also paves the way for client-side support which needs a way to refer to yet-to-be-created streams (due to how HEADERS allocates a stream id, and the allocation order must be the same as transmission order).
71 lines
2.0 KiB
Java
71 lines
2.0 KiB
Java
/*
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* Copyright 2016 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.http2;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufHolder;
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/**
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* HTTP/2 GOAWAY frame. Last-Stream-Id is not exposed directly, but instead via the relative {@link
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* #extraStreamIds()}.
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*/
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public interface Http2GoAwayFrame extends Http2Frame, ByteBufHolder {
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/**
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* The reason for beginning closure of the connection. Represented as an HTTP/2 error code.
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*/
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long errorCode();
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/**
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* The number of IDs to reserve for the receiver to use while GOAWAY is in transit. This allows
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* for new streams currently en route to still be created, up to a point, which allows for very
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* graceful shutdown of both sides.
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*/
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int extraStreamIds();
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/**
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* Sets the number of IDs to reserve for the receiver to use while GOAWAY is in transit.
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*
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* @see #extraStreamIds
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* @return {@code this}
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*/
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Http2GoAwayFrame setExtraStreamIds(int extraStreamIds);
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/**
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* Optional debugging information describing cause the GOAWAY. Will not be {@code null}, but may
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* be empty.
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*/
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@Override
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ByteBuf content();
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@Override
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Http2GoAwayFrame copy();
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@Override
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Http2GoAwayFrame duplicate();
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@Override
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Http2GoAwayFrame retain();
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@Override
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Http2GoAwayFrame retain(int increment);
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@Override
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Http2GoAwayFrame touch();
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@Override
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Http2GoAwayFrame touch(Object hint);
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}
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