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4ff77fb370
The connection to GAE is not persistent and can drop. Reconnect when that happens, as long as the connection from the client is still active. We need to consider the fact that while a reconnection is happening, the client may be sending requests that was relayed to the old connection, which is not going through. In that case these requests are queued and will be retried when the new connection is available. Since we are no longer tying the lifecycles of the two connections, we cannot automatically terminate one when another is terminated. Also we need to explicitly control how WHOIS connection is terminated, not depending on the HTTP connection header. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=207335498
66 lines
2.4 KiB
Java
66 lines
2.4 KiB
Java
// Copyright 2017 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.proxy.handler;
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import static com.google.common.base.Preconditions.checkArgument;
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import google.registry.proxy.metric.FrontendMetrics;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelPromise;
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import io.netty.handler.codec.http.FullHttpRequest;
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import io.netty.handler.codec.http.HttpHeaderNames;
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import io.netty.handler.codec.http.HttpHeaderValues;
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import io.netty.handler.codec.http.HttpResponse;
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import java.util.function.Supplier;
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/** Handler that processes WHOIS protocol logic. */
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public final class WhoisServiceHandler extends HttpsRelayServiceHandler {
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public WhoisServiceHandler(
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String relayHost,
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String relayPath,
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Supplier<String> accessTokenSupplier,
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FrontendMetrics metrics) {
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super(relayHost, relayPath, accessTokenSupplier, metrics);
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}
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@Override
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public void channelActive(ChannelHandlerContext ctx) throws Exception {
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metrics.registerActiveConnection("whois", "none", ctx.channel());
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super.channelActive(ctx);
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}
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@Override
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protected FullHttpRequest decodeFullHttpRequest(ByteBuf byteBuf) {
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FullHttpRequest request = super.decodeFullHttpRequest(byteBuf);
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request
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.headers()
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.set(HttpHeaderNames.CONTENT_TYPE, HttpHeaderValues.TEXT_PLAIN)
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.set(HttpHeaderNames.ACCEPT, HttpHeaderValues.TEXT_PLAIN);
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return request;
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}
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@Override
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public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise)
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throws Exception {
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// Close connection after a response is received, per RFC-3912
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// https://tools.ietf.org/html/rfc3912
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checkArgument(msg instanceof HttpResponse);
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promise.addListener(ChannelFutureListener.CLOSE);
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super.write(ctx, msg, promise);
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}
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}
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