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// Copyright 2018 The Bazel Authors. All rights reserved.
//
// Licensed 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.google.devtools.build.lib.remote.blobstore.http;
import static com.google.common.base.Preconditions.checkState;
import com.google.auth.Credentials;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.http.DefaultHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpChunkedInput;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.HttpRequest;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.HttpUtil;
import io.netty.handler.codec.http.HttpVersion;
import io.netty.handler.stream.ChunkedStream;
import io.netty.util.internal.StringUtil;
import java.io.IOException;
/** ChannelHandler for uploads. */
final class HttpUploadHandler extends AbstractHttpHandler<FullHttpResponse> {
public HttpUploadHandler(Credentials credentials) {
super(credentials);
}
@SuppressWarnings("FutureReturnValueIgnored")
@Override
protected void channelRead0(ChannelHandlerContext ctx, FullHttpResponse response) {
if (!response.decoderResult().isSuccess()) {
failAndResetUserPromise(new IOException("Failed to parse the HTTP response."));
return;
}
try {
checkState(userPromise != null, "response before request");
if (!response.status().equals(HttpResponseStatus.OK)
&& !response.status().equals(HttpResponseStatus.ACCEPTED)
&& !response.status().equals(HttpResponseStatus.CREATED)
&& !response.status().equals(HttpResponseStatus.NO_CONTENT)) {
// Supporting more than OK status to be compatible with nginx webdav.
failAndResetUserPromise(
new HttpException(response, "Upload failed with status: " + response.status(), null));
} else {
succeedAndResetUserPromise();
}
} finally {
if (!HttpUtil.isKeepAlive(response)) {
ctx.close();
}
}
}
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise)
throws Exception {
checkState(userPromise == null, "handler can't be shared between pipelines.");
userPromise = promise;
if (!(msg instanceof UploadCommand)) {
failAndResetUserPromise(
new IllegalArgumentException(
"Unsupported message type: " + StringUtil.simpleClassName(msg)));
return;
}
HttpRequest request = buildRequest((UploadCommand) msg);
addCredentialHeaders(request, ((UploadCommand) msg).uri());
HttpChunkedInput body = buildBody((UploadCommand) msg);
ctx.writeAndFlush(request)
.addListener(
(f) -> {
if (f.isSuccess()) {
return;
}
failAndResetUserPromise(f.cause());
});
ctx.writeAndFlush(body)
.addListener(
(f) -> {
if (f.isSuccess()) {
return;
}
failAndResetUserPromise(f.cause());
});
}
private HttpRequest buildRequest(UploadCommand msg) {
HttpRequest request =
new DefaultHttpRequest(
HttpVersion.HTTP_1_1,
HttpMethod.PUT,
constructPath(msg.uri(), msg.hash(), msg.casUpload()));
request.headers().set(HttpHeaderNames.HOST, constructHost(msg.uri()));
request.headers().set(HttpHeaderNames.ACCEPT, "*/*");
request.headers().set(HttpHeaderNames.CONTENT_LENGTH, msg.contentLength());
request.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE);
return request;
}
private HttpChunkedInput buildBody(UploadCommand msg) {
return new HttpChunkedInput(new ChunkedStream(msg.data()));
}
}
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