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/*
*
* 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.
*
*/
#include <grpc/support/port_platform.h>
#include <grpc/grpc.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/string_util.h>
#include "src/core/ext/filters/client_channel/client_channel.h"
#include "src/core/ext/filters/client_channel/resolver_registry.h"
#include "src/core/ext/transport/chttp2/client/authority.h"
#include "src/core/ext/transport/chttp2/client/chttp2_connector.h"
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/surface/api_trace.h"
#include "src/core/lib/surface/channel.h"
namespace grpc_core {
class Chttp2InsecureClientChannelFactory : public ClientChannelFactory {
public:
RefCountedPtr<Subchannel> CreateSubchannel(
const grpc_channel_args* args) override {
grpc_channel_args* new_args =
grpc_default_authority_add_if_not_present(args);
RefCountedPtr<Subchannel> s =
Subchannel::Create(MakeOrphanable<Chttp2Connector>(), new_args);
grpc_channel_args_destroy(new_args);
return s;
}
};
namespace {
grpc_channel* CreateChannel(const char* target, const grpc_channel_args* args,
grpc_error_handle* error) {
if (target == nullptr) {
gpr_log(GPR_ERROR, "cannot create channel with NULL target name");
if (error != nullptr) {
*error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("channel target is NULL");
}
return nullptr;
}
// Add channel arg containing the server URI.
grpc_core::UniquePtr<char> canonical_target =
ResolverRegistry::AddDefaultPrefixIfNeeded(target);
grpc_arg arg = grpc_channel_arg_string_create(
const_cast<char*>(GRPC_ARG_SERVER_URI), canonical_target.get());
const char* to_remove[] = {GRPC_ARG_SERVER_URI};
grpc_channel_args* new_args =
grpc_channel_args_copy_and_add_and_remove(args, to_remove, 1, &arg, 1);
grpc_channel* channel = grpc_channel_create(
target, new_args, GRPC_CLIENT_CHANNEL, nullptr, nullptr, error);
grpc_channel_args_destroy(new_args);
return channel;
}
} // namespace
} // namespace grpc_core
namespace {
grpc_core::Chttp2InsecureClientChannelFactory* g_factory;
gpr_once g_factory_once = GPR_ONCE_INIT;
void FactoryInit() {
g_factory = new grpc_core::Chttp2InsecureClientChannelFactory();
}
} // namespace
/* Create a client channel:
Asynchronously: - resolve target
- connect to it (trying alternatives as presented)
- perform handshakes */
grpc_channel* grpc_insecure_channel_create(const char* target,
const grpc_channel_args* args,
void* reserved) {
grpc_core::ExecCtx exec_ctx;
GRPC_API_TRACE(
"grpc_insecure_channel_create(target=%s, args=%p, reserved=%p)", 3,
(target, args, reserved));
GPR_ASSERT(reserved == nullptr);
// Add channel arg containing the client channel factory.
gpr_once_init(&g_factory_once, FactoryInit);
grpc_arg arg = grpc_core::ClientChannelFactory::CreateChannelArg(g_factory);
const char* arg_to_remove = arg.key;
grpc_channel_args* new_args = grpc_channel_args_copy_and_add_and_remove(
args, &arg_to_remove, 1, &arg, 1);
grpc_error_handle error = GRPC_ERROR_NONE;
// Create channel.
grpc_channel* channel = grpc_core::CreateChannel(target, new_args, &error);
// Clean up.
grpc_channel_args_destroy(new_args);
if (channel == nullptr) {
intptr_t integer;
grpc_status_code status = GRPC_STATUS_INTERNAL;
if (grpc_error_get_int(error, GRPC_ERROR_INT_GRPC_STATUS, &integer)) {
status = static_cast<grpc_status_code>(integer);
}
GRPC_ERROR_UNREF(error);
channel = grpc_lame_client_channel_create(
target, status, "Failed to create client channel");
}
return channel;
}
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