Jan Tattermusch | 0201776 | 2016-11-23 15:39:56 +0100 | [diff] [blame] | 1 | #region Copyright notice and license |
Jan Tattermusch | 7897ae9 | 2017-06-07 22:57:36 +0200 | [diff] [blame] | 2 | // Copyright 2015 gRPC authors. |
Jan Tattermusch | 0201776 | 2016-11-23 15:39:56 +0100 | [diff] [blame] | 3 | // |
Jan Tattermusch | 7897ae9 | 2017-06-07 22:57:36 +0200 | [diff] [blame] | 4 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | // you may not use this file except in compliance with the License. |
| 6 | // You may obtain a copy of the License at |
Jan Tattermusch | 0201776 | 2016-11-23 15:39:56 +0100 | [diff] [blame] | 7 | // |
Jan Tattermusch | 7897ae9 | 2017-06-07 22:57:36 +0200 | [diff] [blame] | 8 | // http://www.apache.org/licenses/LICENSE-2.0 |
Jan Tattermusch | 0201776 | 2016-11-23 15:39:56 +0100 | [diff] [blame] | 9 | // |
Jan Tattermusch | 7897ae9 | 2017-06-07 22:57:36 +0200 | [diff] [blame] | 10 | // Unless required by applicable law or agreed to in writing, software |
| 11 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | // See the License for the specific language governing permissions and |
| 14 | // limitations under the License. |
Jan Tattermusch | 0201776 | 2016-11-23 15:39:56 +0100 | [diff] [blame] | 15 | #endregion |
| 16 | |
| 17 | using System; |
| 18 | using System.Collections.Generic; |
| 19 | using System.Linq; |
| 20 | using System.Text; |
| 21 | using System.Threading.Tasks; |
| 22 | |
| 23 | using Grpc.Core; |
| 24 | using Grpc.Core.Utils; |
| 25 | using Grpc.Reflection.V1Alpha; |
| 26 | using Google.Protobuf.Reflection; |
| 27 | |
| 28 | namespace Grpc.Reflection |
| 29 | { |
| 30 | /// <summary> |
| 31 | /// Implementation of server reflection service. |
| 32 | /// </summary> |
| 33 | public class ReflectionServiceImpl : Grpc.Reflection.V1Alpha.ServerReflection.ServerReflectionBase |
| 34 | { |
| 35 | readonly List<string> services; |
| 36 | readonly SymbolRegistry symbolRegistry; |
| 37 | |
| 38 | /// <summary> |
| 39 | /// Creates a new instance of <c>ReflectionServiceIml</c>. |
| 40 | /// </summary> |
| 41 | public ReflectionServiceImpl(IEnumerable<string> services, SymbolRegistry symbolRegistry) |
| 42 | { |
| 43 | this.services = new List<string>(services); |
| 44 | this.symbolRegistry = symbolRegistry; |
| 45 | } |
| 46 | |
| 47 | /// <summary> |
| 48 | /// Creates a new instance of <c>ReflectionServiceIml</c>. |
| 49 | /// </summary> |
| 50 | public ReflectionServiceImpl(IEnumerable<ServiceDescriptor> serviceDescriptors) |
| 51 | { |
| 52 | this.services = new List<string>(serviceDescriptors.Select((serviceDescriptor) => serviceDescriptor.FullName)); |
| 53 | this.symbolRegistry = SymbolRegistry.FromFiles(serviceDescriptors.Select((serviceDescriptor) => serviceDescriptor.File)); |
| 54 | } |
| 55 | |
| 56 | /// <summary> |
| 57 | /// Creates a new instance of <c>ReflectionServiceIml</c>. |
| 58 | /// </summary> |
| 59 | public ReflectionServiceImpl(params ServiceDescriptor[] serviceDescriptors) : this((IEnumerable<ServiceDescriptor>) serviceDescriptors) |
| 60 | { |
| 61 | } |
| 62 | |
Jan Tattermusch | aa135ce | 2017-08-08 17:24:39 +0200 | [diff] [blame] | 63 | /// <summary> |
| 64 | /// Processes a stream of server reflection requests. |
| 65 | /// </summary> |
Jan Tattermusch | 0201776 | 2016-11-23 15:39:56 +0100 | [diff] [blame] | 66 | public override async Task ServerReflectionInfo(IAsyncStreamReader<ServerReflectionRequest> requestStream, IServerStreamWriter<ServerReflectionResponse> responseStream, ServerCallContext context) |
| 67 | { |
| 68 | while (await requestStream.MoveNext()) |
| 69 | { |
| 70 | var response = ProcessRequest(requestStream.Current); |
| 71 | await responseStream.WriteAsync(response); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | ServerReflectionResponse ProcessRequest(ServerReflectionRequest request) |
| 76 | { |
| 77 | switch (request.MessageRequestCase) |
| 78 | { |
| 79 | case ServerReflectionRequest.MessageRequestOneofCase.FileByFilename: |
| 80 | return FileByFilename(request.FileByFilename); |
| 81 | case ServerReflectionRequest.MessageRequestOneofCase.FileContainingSymbol: |
| 82 | return FileContainingSymbol(request.FileContainingSymbol); |
| 83 | case ServerReflectionRequest.MessageRequestOneofCase.ListServices: |
| 84 | return ListServices(); |
| 85 | case ServerReflectionRequest.MessageRequestOneofCase.AllExtensionNumbersOfType: |
| 86 | case ServerReflectionRequest.MessageRequestOneofCase.FileContainingExtension: |
| 87 | default: |
| 88 | return CreateErrorResponse(StatusCode.Unimplemented, "Request type not supported by C# reflection service."); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | ServerReflectionResponse FileByFilename(string filename) |
| 93 | { |
| 94 | FileDescriptor file = symbolRegistry.FileByName(filename); |
| 95 | if (file == null) |
| 96 | { |
| 97 | return CreateErrorResponse(StatusCode.NotFound, "File not found."); |
| 98 | } |
| 99 | |
| 100 | var transitiveDependencies = new HashSet<FileDescriptor>(); |
| 101 | CollectTransitiveDependencies(file, transitiveDependencies); |
| 102 | |
| 103 | return new ServerReflectionResponse |
| 104 | { |
| 105 | FileDescriptorResponse = new FileDescriptorResponse { FileDescriptorProto = { transitiveDependencies.Select((d) => d.SerializedData) } } |
| 106 | }; |
| 107 | } |
| 108 | |
| 109 | ServerReflectionResponse FileContainingSymbol(string symbol) |
| 110 | { |
| 111 | FileDescriptor file = symbolRegistry.FileContainingSymbol(symbol); |
| 112 | if (file == null) |
| 113 | { |
| 114 | return CreateErrorResponse(StatusCode.NotFound, "Symbol not found."); |
| 115 | } |
| 116 | |
| 117 | var transitiveDependencies = new HashSet<FileDescriptor>(); |
| 118 | CollectTransitiveDependencies(file, transitiveDependencies); |
| 119 | |
| 120 | return new ServerReflectionResponse |
| 121 | { |
| 122 | FileDescriptorResponse = new FileDescriptorResponse { FileDescriptorProto = { transitiveDependencies.Select((d) => d.SerializedData) } } |
| 123 | }; |
| 124 | } |
| 125 | |
| 126 | ServerReflectionResponse ListServices() |
| 127 | { |
| 128 | var serviceResponses = new ListServiceResponse(); |
| 129 | foreach (string serviceName in services) |
| 130 | { |
| 131 | serviceResponses.Service.Add(new ServiceResponse { Name = serviceName }); |
| 132 | } |
| 133 | |
| 134 | return new ServerReflectionResponse |
| 135 | { |
| 136 | ListServicesResponse = serviceResponses |
| 137 | }; |
| 138 | } |
| 139 | |
| 140 | ServerReflectionResponse CreateErrorResponse(StatusCode status, string message) |
| 141 | { |
| 142 | return new ServerReflectionResponse |
| 143 | { |
| 144 | ErrorResponse = new ErrorResponse { ErrorCode = (int) status, ErrorMessage = message } |
| 145 | }; |
| 146 | } |
| 147 | |
| 148 | void CollectTransitiveDependencies(FileDescriptor descriptor, HashSet<FileDescriptor> pool) |
| 149 | { |
| 150 | pool.Add(descriptor); |
| 151 | foreach (var dependency in descriptor.Dependencies) |
| 152 | { |
| 153 | if (pool.Add(dependency)) |
| 154 | { |
| 155 | // descriptors cannot have circular dependencies |
| 156 | CollectTransitiveDependencies(dependency, pool); |
| 157 | } |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | } |