-
Notifications
You must be signed in to change notification settings - Fork 768
/
HttpHandlerFactory.cs
75 lines (68 loc) · 3.02 KB
/
HttpHandlerFactory.cs
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
#region Copyright notice and license
// Copyright 2019 The gRPC Authors
//
// 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.
#endregion
using Grpc.Net.Client;
namespace Grpc.Shared
{
internal static class HttpHandlerFactory
{
public static HttpMessageHandler CreatePrimaryHandler()
{
#if NET5_0_OR_GREATER
// If we're in .NET 5 and SocketsHttpHandler is supported (it's not in Blazor WebAssembly)
// then create SocketsHttpHandler with EnableMultipleHttp2Connections set to true. That will
// allow a gRPC channel to create new connections if the maximum allow concurrency is exceeded.
if (SocketsHttpHandler.IsSupported)
{
return new SocketsHttpHandler
{
EnableMultipleHttp2Connections = true
};
}
#endif
#if !NETSTANDARD2_0
return new HttpClientHandler();
#else
var message =
$"gRPC requires extra configuration on .NET implementations that don't support gRPC over HTTP/2. " +
$"An HTTP provider must be specified using {nameof(GrpcChannelOptions)}.{nameof(GrpcChannelOptions.HttpHandler)}." +
$"The configured HTTP provider must either support HTTP/2 or be configured to use gRPC-Web. " +
$"See https://aka.ms/aspnet/grpc/netstandard for details.";
throw new PlatformNotSupportedException(message);
#endif
}
#if NET5_0
public static HttpMessageHandler EnsureTelemetryHandler(HttpMessageHandler handler)
{
// HttpClientHandler has an internal handler that sets request telemetry header.
// If the handler is SocketsHttpHandler then we know that the header will never be set
// so wrap with a handler that is responsible for setting the telemetry header.
if (HttpRequestHelpers.HasHttpHandlerType<SocketsHttpHandler>(handler))
{
// Double check telemetry handler hasn't already been added by something else
// like the client factory when it created the primary handler.
//
// Check with type name because this handler can come from shared source
// in multiple assemblies.
if (!HttpRequestHelpers.HasHttpHandlerType(handler, typeof(TelemetryHeaderHandler).FullName!))
{
return new TelemetryHeaderHandler(handler);
}
}
return handler;
}
#endif
}
}