| /* |
| * |
| * Copyright 2017 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. |
| * |
| */ |
| |
| #include <string.h> |
| |
| #include "src/core/ext/filters/http/client/http_client_filter.h" |
| #include "src/core/ext/filters/http/message_compress/message_compress_filter.h" |
| #include "src/core/ext/filters/http/server/http_server_filter.h" |
| #include "src/core/lib/channel/channel_stack_builder.h" |
| #include "src/core/lib/surface/call.h" |
| #include "src/core/lib/surface/channel_init.h" |
| #include "src/core/lib/transport/transport_impl.h" |
| |
| typedef struct { |
| const grpc_channel_filter *filter; |
| const char *control_channel_arg; |
| } optional_filter; |
| |
| static optional_filter compress_filter = { |
| &grpc_message_compress_filter, GRPC_ARG_ENABLE_PER_MESSAGE_COMPRESSION}; |
| |
| static bool is_building_http_like_transport( |
| grpc_channel_stack_builder *builder) { |
| grpc_transport *t = grpc_channel_stack_builder_get_transport(builder); |
| return t != NULL && strstr(t->vtable->name, "http"); |
| } |
| |
| static bool maybe_add_optional_filter(grpc_exec_ctx *exec_ctx, |
| grpc_channel_stack_builder *builder, |
| void *arg) { |
| if (!is_building_http_like_transport(builder)) return true; |
| optional_filter *filtarg = (optional_filter *)arg; |
| const grpc_channel_args *channel_args = |
| grpc_channel_stack_builder_get_channel_arguments(builder); |
| bool enable = grpc_channel_arg_get_bool( |
| grpc_channel_args_find(channel_args, filtarg->control_channel_arg), |
| !grpc_channel_args_want_minimal_stack(channel_args)); |
| return enable ? grpc_channel_stack_builder_prepend_filter( |
| builder, filtarg->filter, NULL, NULL) |
| : true; |
| } |
| |
| static bool maybe_add_required_filter(grpc_exec_ctx *exec_ctx, |
| grpc_channel_stack_builder *builder, |
| void *arg) { |
| return is_building_http_like_transport(builder) |
| ? grpc_channel_stack_builder_prepend_filter( |
| builder, (const grpc_channel_filter *)arg, NULL, NULL) |
| : true; |
| } |
| |
| void grpc_http_filters_init(void) { |
| grpc_register_tracer(&grpc_compression_trace); |
| grpc_channel_init_register_stage(GRPC_CLIENT_SUBCHANNEL, |
| GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_optional_filter, &compress_filter); |
| grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL, |
| GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_optional_filter, &compress_filter); |
| grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, |
| GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_optional_filter, &compress_filter); |
| grpc_channel_init_register_stage( |
| GRPC_CLIENT_SUBCHANNEL, GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_required_filter, (void *)&grpc_http_client_filter); |
| grpc_channel_init_register_stage( |
| GRPC_CLIENT_DIRECT_CHANNEL, GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_required_filter, (void *)&grpc_http_client_filter); |
| grpc_channel_init_register_stage( |
| GRPC_SERVER_CHANNEL, GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_required_filter, (void *)&grpc_http_server_filter); |
| } |
| |
| void grpc_http_filters_shutdown(void) {} |