Http3RequestStreamEncodeStateValidator.java — netty Source File

Source Code

/*
 * Copyright 2021 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:
 *
 *   https://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.http3;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.http.HttpStatusClass;
import org.jetbrains.annotations.Nullable;

import static io.netty.handler.codec.http3.Http3FrameValidationUtils.frameTypeUnexpected;

final class Http3RequestStreamEncodeStateValidator extends ChannelOutboundHandlerAdapter
        implements Http3RequestStreamCodecState {
    enum State {
        None,
        Headers,
        FinalHeaders,
        Trailers
    }
    private State state = State.None;

    @Override
    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
        if (!(msg instanceof Http3RequestStreamFrame)) {
            super.write(ctx, msg, promise);
            return;
        }
        final Http3RequestStreamFrame frame = (Http3RequestStreamFrame) msg;
        final State nextState = evaluateFrame(state, frame);
        if (nextState == null) {
            frameTypeUnexpected(ctx, msg);
            return;
        }
        state = nextState;
        super.write(ctx, msg, promise);
    }

    @Override
    public boolean started() {
        return isStreamStarted(state);
    }

    @Override
    public boolean receivedFinalHeaders() {
        return isFinalHeadersReceived(state);
    }
// ... (65 more lines)