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/*
*
* 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 <grpc/support/port_platform.h>
#include <limits.h>
#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 != nullptr && strstr(t->vtable->name, "http");
}
static bool maybe_add_optional_filter(grpc_channel_stack_builder* builder,
void* arg) {
if (!is_building_http_like_transport(builder)) return true;
optional_filter* filtarg = static_cast<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_append_filter(
builder, filtarg->filter, nullptr, nullptr)
: true;
}
static bool maybe_append_required_filter(grpc_channel_stack_builder* builder,
void* arg) {
return is_building_http_like_transport(builder)
? grpc_channel_stack_builder_append_filter(
builder, static_cast<const grpc_channel_filter*>(arg),
nullptr, nullptr)
: true;
}
void grpc_http_filters_init(void) {
grpc_channel_init_register_stage(GRPC_CLIENT_SUBCHANNEL,
GRPC_CHANNEL_INIT_PRIORITY_HIGH,
maybe_add_optional_filter, &compress_filter);
grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL,
GRPC_CHANNEL_INIT_PRIORITY_HIGH,
maybe_add_optional_filter, &compress_filter);
grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL,
GRPC_CHANNEL_INIT_PRIORITY_HIGH,
maybe_add_optional_filter, &compress_filter);
grpc_channel_init_register_stage(
GRPC_CLIENT_SUBCHANNEL, GRPC_CHANNEL_INIT_PRIORITY_HIGH,
maybe_append_required_filter, (void*)&grpc_http_client_filter);
grpc_channel_init_register_stage(
GRPC_CLIENT_DIRECT_CHANNEL, GRPC_CHANNEL_INIT_PRIORITY_HIGH,
maybe_append_required_filter, (void*)&grpc_http_client_filter);
grpc_channel_init_register_stage(
GRPC_SERVER_CHANNEL, GRPC_CHANNEL_INIT_PRIORITY_HIGH,
maybe_append_required_filter, (void*)&grpc_http_server_filter);
}
void grpc_http_filters_shutdown(void) {}
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