tdlight-telegram-bot-api/telegram-bot-api/Query.h
2021-06-14 22:47:01 +03:00

268 lines
8.0 KiB
C++

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "telegram-bot-api/ClientParameters.h"
#include "td/actor/actor.h"
#include "td/actor/PromiseFuture.h"
#include "td/net/HttpFile.h"
#include "td/utils/buffer.h"
#include "td/utils/common.h"
#include "td/utils/JsonBuilder.h"
#include "td/utils/List.h"
#include "td/utils/port/IPAddress.h"
#include "td/utils/Slice.h"
#include "td/utils/StringBuilder.h"
#include <algorithm>
#include <memory>
#include <unordered_map>
#include <utility>
namespace telegram_bot_api {
class BotStatActor;
class Query : public td::ListNode {
public:
enum class State : td::int8 { Query, OK, Error };
td::Slice token() const {
return token_;
}
bool is_test_dc() const {
return is_test_dc_;
}
td::Slice method() const {
return method_;
}
bool has_arg(td::Slice key) const {
auto it = std::find_if(args_.begin(), args_.end(),
[&key](const std::pair<td::MutableSlice, td::MutableSlice> &s) { return s.first == key; });
return it != args_.end();
}
td::MutableSlice arg(td::Slice key) const {
auto it = std::find_if(args_.begin(), args_.end(),
[&key](const std::pair<td::MutableSlice, td::MutableSlice> &s) { return s.first == key; });
return it == args_.end() ? td::MutableSlice() : it->second;
}
const td::vector<std::pair<td::MutableSlice, td::MutableSlice>> &args() const {
return args_;
}
td::Slice get_header(td::Slice key) const {
auto it = std::find_if(headers_.begin(), headers_.end(),
[&key](const std::pair<td::MutableSlice, td::MutableSlice> &s) { return s.first == key; });
return it == headers_.end() ? td::Slice() : it->second;
}
const td::HttpFile *file(td::Slice key) const {
auto it = std::find_if(files_.begin(), files_.end(), [&key](const td::HttpFile &f) { return f.field_name == key; });
return it == files_.end() ? nullptr : &*it;
}
const td::vector<td::HttpFile> &files() const {
return files_;
}
const td::IPAddress &peer_address() const {
return peer_address_;
}
td::BufferSlice &answer() {
return answer_;
}
int http_status_code() const {
return http_status_code_;
}
int retry_after() const {
return retry_after_;
}
void set_ok(td::BufferSlice result);
void set_error(int http_status_code, td::BufferSlice result);
void set_retry_after_error(int retry_after);
bool is_ready() const {
return state_ != State::Query;
}
bool is_internal() const {
return is_internal_;
}
Query(td::vector<td::BufferSlice> &&container, td::Slice token, bool is_test_dc, td::MutableSlice method,
td::vector<std::pair<td::MutableSlice, td::MutableSlice>> &&args,
td::vector<std::pair<td::MutableSlice, td::MutableSlice>> &&headers, td::vector<td::HttpFile> &&files,
std::shared_ptr<SharedData> shared_data, const td::IPAddress &peer_address, bool is_internal);
Query(const Query &) = delete;
Query &operator=(const Query &) = delete;
Query(Query &&) = delete;
Query &operator=(Query &&) = delete;
~Query() {
if (shared_data_) {
shared_data_->query_count_--;
}
}
double start_timestamp() const {
return start_timestamp_;
}
void set_stat_actor(td::ActorId<BotStatActor> stat_actor);
private:
State state_;
std::shared_ptr<SharedData> shared_data_;
double start_timestamp_;
td::IPAddress peer_address_;
td::ActorId<BotStatActor> stat_actor_;
// request
td::vector<td::BufferSlice> container_;
td::Slice token_;
bool is_test_dc_;
td::MutableSlice method_;
td::vector<std::pair<td::MutableSlice, td::MutableSlice>> args_;
td::vector<std::pair<td::MutableSlice, td::MutableSlice>> headers_;
td::vector<td::HttpFile> files_;
bool is_internal_ = false;
// response
td::BufferSlice answer_;
int http_status_code_ = 0;
int retry_after_ = 0;
// for stats
td::int32 file_count() const {
return static_cast<td::int32>(files_.size());
}
td::int64 query_size() const;
td::int64 files_size() const;
td::int64 files_max_size() const;
void send_request_stat() const;
void send_response_stat() const;
};
td::StringBuilder &operator<<(td::StringBuilder &sb, const Query &query);
// fix for outdated C++14 libraries
// https://stackoverflow.com/questions/26947704/implicit-conversion-failure-from-initializer-list
extern std::unordered_map<td::string, std::unique_ptr<td::VirtuallyJsonable>> empty_parameters;
class JsonParameters : public td::Jsonable {
public:
explicit JsonParameters(const std::unordered_map<td::string, std::unique_ptr<td::VirtuallyJsonable>> &parameters)
: parameters_(parameters) {
}
void store(td::JsonValueScope *scope) const {
auto object = scope->enter_object();
for (auto &parameter : parameters_) {
CHECK(parameter.second != nullptr);
object(parameter.first, *parameter.second);
}
}
private:
const std::unordered_map<td::string, std::unique_ptr<td::VirtuallyJsonable>> &parameters_;
};
template <class T>
class JsonQueryOk : public td::Jsonable {
public:
JsonQueryOk(const T &result, td::Slice description) : result_(result), description_(description) {
}
void store(td::JsonValueScope *scope) const {
auto object = scope->enter_object();
object("ok", td::JsonTrue());
object("result", result_);
if (!description_.empty()) {
object("description", description_);
}
}
private:
const T &result_;
td::Slice description_;
};
class JsonQueryError : public td::Jsonable {
public:
JsonQueryError(
int error_code, td::Slice description,
const std::unordered_map<td::string, std::unique_ptr<td::VirtuallyJsonable>> &parameters = empty_parameters)
: error_code_(error_code), description_(description), parameters_(parameters) {
}
void store(td::JsonValueScope *scope) const {
auto object = scope->enter_object();
object("ok", td::JsonFalse());
object("error_code", error_code_);
object("description", description_);
if (!parameters_.empty()) {
object("parameters", JsonParameters(parameters_));
}
}
private:
int error_code_;
td::Slice description_;
const std::unordered_map<td::string, std::unique_ptr<td::VirtuallyJsonable>> &parameters_;
};
class PromiseDeleter {
public:
explicit PromiseDeleter(td::PromiseActor<td::unique_ptr<Query>> &&promise) : promise_(std::move(promise)) {
}
PromiseDeleter() = default;
PromiseDeleter(const PromiseDeleter &) = delete;
PromiseDeleter &operator=(const PromiseDeleter &) = delete;
PromiseDeleter(PromiseDeleter &&) = default;
PromiseDeleter &operator=(PromiseDeleter &&) = default;
void operator()(Query *raw_ptr) {
td::unique_ptr<Query> query(raw_ptr); // now I cannot forget to delete this pointer
if (!promise_.empty_promise()) {
if (!query->is_ready()) {
query->set_retry_after_error(5);
}
promise_.set_value(std::move(query));
}
}
~PromiseDeleter() {
CHECK(promise_.empty());
}
private:
td::PromiseActor<td::unique_ptr<Query>> promise_;
};
using PromisedQueryPtr = std::unique_ptr<Query, PromiseDeleter>;
template <class Jsonable>
void answer_query(const Jsonable &result, PromisedQueryPtr query, td::Slice description = td::Slice()) {
query->set_ok(td::json_encode<td::BufferSlice>(JsonQueryOk<Jsonable>(result, description)));
query.reset(); // send query into promise explicitly
}
inline void fail_query(
int http_status_code, td::Slice description, PromisedQueryPtr query,
const std::unordered_map<td::string, std::unique_ptr<td::VirtuallyJsonable>> &parameters = empty_parameters) {
query->set_error(http_status_code,
td::json_encode<td::BufferSlice>(JsonQueryError(http_status_code, description, parameters)));
query.reset(); // send query into promise explicitly
}
} // namespace telegram_bot_api