/*
* Copyright 2016 LINE Corporation
*
* LINE Corporation 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 com.linecorp.armeria.internal.http;
import static java.util.Objects.requireNonNull;
import com.linecorp.armeria.common.http.HttpData;
import com.linecorp.armeria.common.http.HttpHeaders;
import com.linecorp.armeria.common.stream.ClosedPublisherException;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.http2.Http2ConnectionEncoder;
import io.netty.handler.codec.http2.Http2Error;
import io.netty.handler.codec.http2.Http2Stream;
public final class Http2ObjectEncoder extends HttpObjectEncoder {
private final Http2ConnectionEncoder encoder;
public Http2ObjectEncoder(Http2ConnectionEncoder encoder) {
this.encoder = requireNonNull(encoder, "encoder");
}
@Override
protected ChannelFuture doWriteHeaders(
ChannelHandlerContext ctx, int id, int streamId, HttpHeaders headers, boolean endStream) {
final ChannelFuture future = validateStream(ctx, streamId);
if (future != null) {
return future;
}
return encoder.writeHeaders(
ctx, streamId, ArmeriaHttpUtil.toNettyHttp2(headers), 0, endStream, ctx.newPromise());
}
@Override
protected ChannelFuture doWriteData(
ChannelHandlerContext ctx, int id, int streamId, HttpData data, boolean endStream) {
final ChannelFuture future = validateStream(ctx, streamId);
if (future != null) {
return future;
}
return encoder.writeData(ctx, streamId, toByteBuf(ctx, data), 0, endStream, ctx.newPromise());
}
@Override
protected ChannelFuture doWriteReset(ChannelHandlerContext ctx, int id, int streamId, Http2Error error) {
final ChannelFuture future = validateStream(ctx, streamId);
if (future != null) {
return future;
}
return encoder.writeRstStream(ctx, streamId, error.code(), ctx.newPromise());
}
private ChannelFuture validateStream(ChannelHandlerContext ctx, int streamId) {
final Http2Stream stream = encoder.connection().stream(streamId);
if (stream != null) {
switch (stream.state()) {
case RESERVED_LOCAL:
case OPEN:
case HALF_CLOSED_REMOTE:
break;
default:
// The response has been sent already.
return ctx.newFailedFuture(ClosedPublisherException.get());
}
} else if (encoder.connection().streamMayHaveExisted(streamId)) {
// Stream has been removed because it has been closed completely.
return ctx.newFailedFuture(ClosedPublisherException.get());
}
return null;
}
@Override
protected void doClose() {}
}