111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/telegram/ClientJson.h"
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#include "td/telegram/td_api.h"
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#include "td/telegram/td_api_json.h"
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#include "td/utils/common.h"
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#include "td/utils/JsonBuilder.h"
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#include "td/utils/logging.h"
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#include "td/utils/port/thread_local.h"
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#include <utility>
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namespace td {
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static td_api::object_ptr<td_api::Function> get_return_error_function(Slice error_message) {
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auto error = td_api::make_object<td_api::error>(400, error_message.str());
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return td_api::make_object<td_api::testReturnError>(std::move(error));
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}
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static std::pair<td_api::object_ptr<td_api::Function>, string> to_request(Slice request) {
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auto request_str = request.str();
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auto r_json_value = json_decode(request_str);
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if (r_json_value.is_error()) {
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return {get_return_error_function(PSLICE()
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<< "Failed to parse request as JSON object: " << r_json_value.error().message()),
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string()};
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}
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auto json_value = r_json_value.move_as_ok();
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if (json_value.type() != JsonValue::Type::Object) {
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return {get_return_error_function("Expected a JSON object"), string()};
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}
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string extra;
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if (has_json_object_field(json_value.get_object(), "@extra")) {
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extra = json_encode<string>(
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get_json_object_field(json_value.get_object(), "@extra", JsonValue::Type::Null).move_as_ok());
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}
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td_api::object_ptr<td_api::Function> func;
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auto status = from_json(func, std::move(json_value));
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if (status.is_error()) {
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return {get_return_error_function(PSLICE()
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<< "Failed to parse JSON object as TDLib request: " << status.error().message()),
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std::move(extra)};
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}
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return std::make_pair(std::move(func), std::move(extra));
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}
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static std::string from_response(const td_api::Object &object, const string &extra) {
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auto str = json_encode<string>(ToJson(object));
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CHECK(!str.empty() && str.back() == '}');
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if (!extra.empty()) {
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str.pop_back();
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str.reserve(str.size() + 11 + extra.size());
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str += ",\"@extra\":";
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str += extra;
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str += '}';
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}
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return str;
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}
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static TD_THREAD_LOCAL std::string *current_output;
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static CSlice store_string(std::string str) {
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init_thread_local<std::string>(current_output);
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*current_output = std::move(str);
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return *current_output;
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}
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void ClientJson::send(Slice request) {
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auto parsed_request = to_request(request);
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std::uint64_t extra_id = extra_id_.fetch_add(1, std::memory_order_relaxed);
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if (!parsed_request.second.empty()) {
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std::lock_guard<std::mutex> guard(mutex_);
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extra_[extra_id] = std::move(parsed_request.second);
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}
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client_.send(Client::Request{extra_id, std::move(parsed_request.first)});
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}
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CSlice ClientJson::receive(double timeout) {
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auto response = client_.receive(timeout);
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if (!response.object) {
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return {};
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}
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std::string extra;
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if (response.id != 0) {
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std::lock_guard<std::mutex> guard(mutex_);
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auto it = extra_.find(response.id);
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if (it != extra_.end()) {
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extra = std::move(it->second);
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extra_.erase(it);
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}
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}
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return store_string(from_response(*response.object, extra));
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}
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CSlice ClientJson::execute(Slice request) {
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auto parsed_request = to_request(request);
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return store_string(from_response(*Client::execute(Client::Request{0, std::move(parsed_request.first)}).object,
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parsed_request.second));
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}
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} // namespace td
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