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// Copyright 2022 The Pigweed 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
//
// https://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.
// Simple RPC server with the transfer service registered. Reads HDLC frames
// with RPC packets through a socket. The transfer service reads and writes to
// files within a given directory. The name of a file is its resource ID.
#include <cstddef>
#include <filesystem>
#include <string>
#include <thread>
#include <variant>
#include <vector>
#include "pw_assert/check.h"
#include "pw_log/log.h"
#include "pw_rpc_system_server/rpc_server.h"
#include "pw_rpc_system_server/socket.h"
#include "pw_stream/std_file_stream.h"
#include "pw_thread/detached_thread.h"
#include "pw_thread_stl/options.h"
#include "pw_transfer/atomic_file_transfer_handler.h"
#include "pw_transfer/transfer.h"
#include "pw_transfer_test/test_server.raw_rpc.pb.h"
namespace pw::transfer {
namespace {
class TestServerService
: public pw_rpc::raw::TestServer::Service<TestServerService> {
public:
TestServerService(TransferService& transfer_service)
: transfer_service_(transfer_service) {}
~TestServerService() { UnregisterHandlers(); }
void UnregisterHandlers() {
for (auto handler : file_transfer_handlers_) {
transfer_service_.UnregisterHandler(*handler);
}
}
void set_directory(const char* directory) { directory_ = directory; }
void ReloadTransferFiles(ConstByteSpan, rpc::RawUnaryResponder&) {
LoadFileHandlers();
}
void LoadFileHandlers() {
PW_LOG_INFO("Reloading file handlers from %s", directory_.c_str());
UnregisterHandlers();
file_transfer_handlers_.clear();
for (const auto& entry : std::filesystem::directory_iterator(directory_)) {
if (!entry.is_regular_file()) {
continue;
}
int resource_id = std::atoi(entry.path().filename().c_str());
if (resource_id > 0) {
PW_LOG_DEBUG("Found transfer file %d", resource_id);
auto handler = std::make_shared<AtomicFileTransferHandler>(
resource_id, entry.path().c_str());
transfer_service_.RegisterHandler(*handler);
file_transfer_handlers_.emplace_back(handler);
}
}
}
private:
TransferService& transfer_service_;
std::string directory_;
std::vector<std::shared_ptr<AtomicFileTransferHandler>>
file_transfer_handlers_;
};
constexpr size_t kChunkSizeBytes = 256;
constexpr size_t kMaxReceiveSizeBytes = 1024;
std::array<std::byte, kChunkSizeBytes> chunk_buffer;
std::array<std::byte, kChunkSizeBytes> encode_buffer;
transfer::Thread<4, 4> transfer_thread(chunk_buffer, encode_buffer);
TransferService transfer_service(transfer_thread, kMaxReceiveSizeBytes);
TestServerService test_server_service(transfer_service);
void RunServer(int socket_port, const char* directory) {
rpc::system_server::set_socket_port(socket_port);
test_server_service.set_directory(directory);
test_server_service.LoadFileHandlers();
rpc::system_server::Init();
rpc::system_server::Server().RegisterService(test_server_service,
transfer_service);
thread::DetachedThread(thread::stl::Options(), transfer_thread);
PW_LOG_INFO("Starting pw_rpc server");
PW_CHECK_OK(rpc::system_server::Start());
}
} // namespace
} // namespace pw::transfer
int main(int argc, char* argv[]) {
if (argc != 3) {
PW_LOG_ERROR("Usage: %s PORT DIR", argv[0]);
return 1;
}
pw::transfer::RunServer(std::atoi(argv[1]), argv[2]);
return 0;
}
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