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).
108 lines
3.4 KiB
Java
108 lines
3.4 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 static io.netty.util.internal.ObjectUtil.checkNotNull;
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/**
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* The default {@link Http2HeadersFrame} implementation.
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*/
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public final class DefaultHttp2HeadersFrame extends AbstractHttp2StreamFrame implements Http2HeadersFrame {
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private final Http2Headers headers;
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private final boolean endStream;
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private final int padding;
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/**
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* Equivalent to {@code new DefaultHttp2HeadersFrame(headers, false)}.
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*
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* @param headers the non-{@code null} headers to send
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*/
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public DefaultHttp2HeadersFrame(Http2Headers headers) {
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this(headers, false);
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}
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/**
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* Equivalent to {@code new DefaultHttp2HeadersFrame(headers, endStream, 0)}.
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*
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* @param headers the non-{@code null} headers to send
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*/
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public DefaultHttp2HeadersFrame(Http2Headers headers, boolean endStream) {
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this(headers, endStream, 0);
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}
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/**
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* Construct a new headers message.
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*
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* @param headers the non-{@code null} headers to send
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* @param endStream whether these headers should terminate the stream
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* @param padding additional bytes that should be added to obscure the true content size
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*/
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public DefaultHttp2HeadersFrame(Http2Headers headers, boolean endStream, int padding) {
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this.headers = checkNotNull(headers, "headers");
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this.endStream = endStream;
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if (padding < 0 || padding > Http2CodecUtil.MAX_UNSIGNED_BYTE) {
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throw new IllegalArgumentException("padding must be non-negative and less than 256");
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}
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this.padding = padding;
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}
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@Override
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public DefaultHttp2HeadersFrame setStream(Object stream) {
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super.setStream(stream);
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return this;
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}
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@Override
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public Http2Headers headers() {
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return headers;
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}
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@Override
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public boolean isEndStream() {
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return endStream;
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}
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@Override
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public int padding() {
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return padding;
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}
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@Override
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public String toString() {
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return "DefaultHttp2HeadersFrame(stream=" + stream() + ", headers=" + headers
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+ ", endStream=" + endStream + ", padding=" + padding + ")";
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}
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@Override
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public boolean equals(Object o) {
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if (!(o instanceof DefaultHttp2HeadersFrame)) {
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return false;
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}
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DefaultHttp2HeadersFrame other = (DefaultHttp2HeadersFrame) o;
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return super.equals(other) && headers.equals(other.headers)
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&& endStream == other.endStream && padding == other.padding;
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}
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@Override
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public int hashCode() {
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int hash = super.hashCode();
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hash = hash * 31 + headers.hashCode();
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hash = hash * 31 + (endStream ? 0 : 1);
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hash = hash * 31 + padding;
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return hash;
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}
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}
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