| /* |
| * |
| * Copyright 2015 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. |
| * |
| */ |
| |
| #ifndef GRPCPP_IMPL_CODEGEN_METADATA_MAP_H |
| #define GRPCPP_IMPL_CODEGEN_METADATA_MAP_H |
| |
| #include <map> |
| |
| #include <grpc/impl/codegen/log.h> |
| #include <grpcpp/impl/codegen/slice.h> |
| |
| namespace grpc { |
| |
| namespace internal { |
| |
| const char kBinaryErrorDetailsKey[] = "grpc-status-details-bin"; |
| |
| class MetadataMap { |
| public: |
| MetadataMap() { Setup(); } |
| |
| ~MetadataMap() { Destroy(); } |
| |
| grpc::string GetBinaryErrorDetails() { |
| // if filled_, extract from the multimap for O(log(n)) |
| if (filled_) { |
| auto iter = map_.find(kBinaryErrorDetailsKey); |
| if (iter != map_.end()) { |
| return grpc::string(iter->second.begin(), iter->second.length()); |
| } |
| } |
| // if not yet filled, take the O(n) lookup to avoid allocating the |
| // multimap until it is requested. |
| // TODO(ncteisen): plumb this through core as a first class object, just |
| // like code and message. |
| else { |
| for (size_t i = 0; i < arr_.count; i++) { |
| if (strncmp(reinterpret_cast<const char*>( |
| GRPC_SLICE_START_PTR(arr_.metadata[i].key)), |
| kBinaryErrorDetailsKey, |
| GRPC_SLICE_LENGTH(arr_.metadata[i].key)) == 0) { |
| return grpc::string(reinterpret_cast<const char*>( |
| GRPC_SLICE_START_PTR(arr_.metadata[i].value)), |
| GRPC_SLICE_LENGTH(arr_.metadata[i].value)); |
| } |
| } |
| } |
| return grpc::string(); |
| } |
| |
| std::multimap<grpc::string_ref, grpc::string_ref>* map() { |
| FillMap(); |
| return &map_; |
| } |
| grpc_metadata_array* arr() { return &arr_; } |
| |
| void Reset() { |
| filled_ = false; |
| map_.clear(); |
| Destroy(); |
| Setup(); |
| } |
| |
| private: |
| bool filled_ = false; |
| grpc_metadata_array arr_; |
| std::multimap<grpc::string_ref, grpc::string_ref> map_; |
| |
| void Destroy() { |
| g_core_codegen_interface->grpc_metadata_array_destroy(&arr_); |
| } |
| |
| void Setup() { memset(&arr_, 0, sizeof(arr_)); } |
| |
| void FillMap() { |
| if (filled_) return; |
| filled_ = true; |
| for (size_t i = 0; i < arr_.count; i++) { |
| // TODO(yangg) handle duplicates? |
| map_.insert(std::pair<grpc::string_ref, grpc::string_ref>( |
| StringRefFromSlice(&arr_.metadata[i].key), |
| StringRefFromSlice(&arr_.metadata[i].value))); |
| } |
| } |
| }; |
| } // namespace internal |
| |
| } // namespace grpc |
| |
| #endif // GRPCPP_IMPL_CODEGEN_METADATA_MAP_H |