1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
// 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 com.google.auth.Credentials;
import com.google.common.base.Charsets;
import com.google.common.io.BaseEncoding;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandler;
import io.netty.channel.ChannelPromise;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpObject;
import io.netty.handler.codec.http.HttpRequest;
import java.io.IOException;
import java.net.SocketAddress;
import java.net.URI;
import java.nio.channels.ClosedChannelException;
import java.util.List;
import java.util.Map;
/** Common functionality shared by concrete classes. */
abstract class AbstractHttpHandler<T extends HttpObject> extends SimpleChannelInboundHandler<T>
implements ChannelOutboundHandler {
private final Credentials credentials;
public AbstractHttpHandler(Credentials credentials) {
this.credentials = credentials;
}
protected ChannelPromise userPromise;
@SuppressWarnings("FutureReturnValueIgnored")
protected void failAndResetUserPromise(Throwable t) {
if (userPromise != null && !userPromise.isDone()) {
userPromise.setFailure(t);
}
userPromise = null;
}
@SuppressWarnings("FutureReturnValueIgnored")
protected void succeedAndResetUserPromise() {
userPromise.setSuccess();
userPromise = null;
}
protected void addCredentialHeaders(HttpRequest request, URI uri) throws IOException {
String userInfo = uri.getUserInfo();
if (userInfo != null) {
String value = BaseEncoding.base64Url().encode(userInfo.getBytes(Charsets.UTF_8));
request.headers().set(HttpHeaderNames.AUTHORIZATION, "Basic " + value);
return;
}
if (credentials == null || !credentials.hasRequestMetadata()) {
return;
}
Map<String, List<String>> authHeaders = credentials.getRequestMetadata(uri);
if (authHeaders == null || authHeaders.isEmpty()) {
return;
}
for (Map.Entry<String, List<String>> entry : authHeaders.entrySet()) {
String name = entry.getKey();
for (String value : entry.getValue()) {
request.headers().add(name, value);
}
}
}
protected String constructPath(URI uri, String hash, boolean isCas) {
StringBuilder builder = new StringBuilder();
builder.append(uri.getPath());
if (!uri.getPath().endsWith("/")) {
builder.append("/");
}
builder.append(isCas ? "cas/" : "ac/");
builder.append(hash);
return builder.toString();
}
protected String constructHost(URI uri) {
return uri.getHost() + ":" + uri.getPort();
}
@Override
public void exceptionCaught(ChannelHandlerContext channelHandlerContext, Throwable throwable) {
failAndResetUserPromise(throwable);
}
@SuppressWarnings("FutureReturnValueIgnored")
@Override
public void bind(ChannelHandlerContext ctx, SocketAddress localAddress, ChannelPromise promise) {
ctx.bind(localAddress, promise);
}
@SuppressWarnings("FutureReturnValueIgnored")
@Override
public void connect(
ChannelHandlerContext ctx,
SocketAddress remoteAddress,
SocketAddress localAddress,
ChannelPromise promise) {
ctx.connect(remoteAddress, localAddress, promise);
}
@SuppressWarnings("FutureReturnValueIgnored")
@Override
public void disconnect(ChannelHandlerContext ctx, ChannelPromise promise) {
failAndResetUserPromise(new ClosedChannelException());
ctx.disconnect(promise);
}
@SuppressWarnings("FutureReturnValueIgnored")
@Override
public void close(ChannelHandlerContext ctx, ChannelPromise promise) {
failAndResetUserPromise(new ClosedChannelException());
ctx.close(promise);
}
@SuppressWarnings("FutureReturnValueIgnored")
@Override
public void deregister(ChannelHandlerContext ctx, ChannelPromise promise) {
ctx.deregister(promise);
}
@SuppressWarnings("FutureReturnValueIgnored")
@Override
public void read(ChannelHandlerContext ctx) {
ctx.read();
}
@SuppressWarnings("FutureReturnValueIgnored")
@Override
public void flush(ChannelHandlerContext ctx) {
ctx.flush();
}
@Override
public void channelInactive(ChannelHandlerContext channelHandlerContext) throws Exception {
failAndResetUserPromise(new ClosedChannelException());
super.channelInactive(channelHandlerContext);
}
}
|
