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118 changes: 118 additions & 0 deletions
118
src/main/java/com/linecorp/armeria/common/http/AbstractHttp2ConnectionHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package com.linecorp.armeria.common.http; | ||
|
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| import static io.netty.handler.codec.http2.Http2Error.INTERNAL_ERROR; | ||
|
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| import com.linecorp.armeria.common.util.Exceptions; | ||
|
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| import io.netty.channel.ChannelHandlerContext; | ||
| import io.netty.channel.ChannelPromise; | ||
| import io.netty.handler.codec.http2.Http2ConnectionDecoder; | ||
| import io.netty.handler.codec.http2.Http2ConnectionEncoder; | ||
| import io.netty.handler.codec.http2.Http2ConnectionHandler; | ||
| import io.netty.handler.codec.http2.Http2Exception; | ||
| import io.netty.handler.codec.http2.Http2Exception.ClosedStreamCreationException; | ||
| import io.netty.handler.codec.http2.Http2Settings; | ||
| import io.netty.handler.codec.http2.Http2Stream.State; | ||
| import io.netty.handler.codec.http2.Http2StreamVisitor; | ||
| import io.netty.handler.codec.http2.HttpToHttp2ConnectionHandler; | ||
|
|
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| public abstract class AbstractHttp2ConnectionHandler extends Http2ConnectionHandler { | ||
|
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| /** | ||
| * XXX(trustin): Don't know why, but {@link Http2ConnectionHandler} does not close the last stream | ||
| * on a cleartext connection, so we make sure all streams are closed. | ||
| */ | ||
| private static final Http2StreamVisitor closeAllStreams = stream -> { | ||
| if (stream.state() != State.CLOSED) { | ||
| stream.close(); | ||
| } | ||
| return true; | ||
| }; | ||
|
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| private boolean closing; | ||
| private boolean handlingConnectionError; | ||
|
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| protected AbstractHttp2ConnectionHandler( | ||
| Http2ConnectionDecoder decoder, Http2ConnectionEncoder encoder, Http2Settings initialSettings) { | ||
| super(decoder, encoder, initialSettings); | ||
| } | ||
|
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| public boolean isClosing() { | ||
| return closing; | ||
| } | ||
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| @Override | ||
| protected void onConnectionError(ChannelHandlerContext ctx, Throwable cause, Http2Exception http2Ex) { | ||
| if (handlingConnectionError) { | ||
| return; | ||
| } | ||
|
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| handlingConnectionError = true; | ||
|
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| // TODO(trustin): Remove this once Http2ConnectionHandler.goAway() sends better debugData. | ||
| // See https://github.com/netty/netty/issues/5160 | ||
| if (http2Ex == null) { | ||
| http2Ex = new Http2Exception(INTERNAL_ERROR, goAwayDebugData(null, cause), cause); | ||
| } else if (http2Ex instanceof ClosedStreamCreationException) { | ||
| final ClosedStreamCreationException e = (ClosedStreamCreationException) http2Ex; | ||
| http2Ex = new ClosedStreamCreationException(e.error(), goAwayDebugData(e, cause), cause); | ||
| } else { | ||
| http2Ex = new Http2Exception( | ||
| http2Ex.error(), goAwayDebugData(http2Ex, cause), cause, http2Ex.shutdownHint()); | ||
| } | ||
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| super.onConnectionError(ctx, cause, http2Ex); | ||
| } | ||
|
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| private static String goAwayDebugData(Http2Exception http2Ex, Throwable cause) { | ||
| final StringBuilder buf = new StringBuilder(256); | ||
| final String type; | ||
| final String message; | ||
|
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| if (http2Ex != null) { | ||
| type = http2Ex.getClass().getName(); | ||
| message = http2Ex.getMessage(); | ||
| } else { | ||
| type = null; | ||
| message = null; | ||
| } | ||
|
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| buf.append("type: "); | ||
| buf.append(type != null ? type : "n/a"); | ||
| buf.append(", message: "); | ||
| buf.append(message != null ? message : "n/a"); | ||
| buf.append(", cause: "); | ||
| buf.append(cause != null ? Exceptions.traceText(cause) : "n/a"); | ||
|
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| return buf.toString(); | ||
| } | ||
|
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| @Override | ||
| public void close(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception { | ||
| closing = true; | ||
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| // TODO(trustin): Remove this line once https://github.com/netty/netty/issues/4210 is fixed. | ||
| connection().forEachActiveStream(closeAllStreams); | ||
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| onCloseRequest(ctx); | ||
| super.close(ctx, promise); | ||
| } | ||
|
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| protected abstract void onCloseRequest(ChannelHandlerContext ctx) throws Exception; | ||
| } |
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