add: spdlog and basic client code.

Util/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.16)
+
+project(Util LANGUAGES CXX)
+
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core)
+find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core)
+
+add_library(Util STATIC Util.h Util.cpp)
+target_link_libraries(Util PRIVATE Qt${QT_VERSION_MAJOR}::Core)
+target_include_directories(Util PUBLIC ${CMAKE_CURRENT_LIST_DIR})

Util/Util.cpp

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+#include "Util.h"
+
+#include <QDateTime>
+#include <QDebug>
+#include <QMutex>
+#include <iostream>
+#include <spdlog/fmt/bundled/color.h>
+#include <spdlog/fmt/fmt.h>
+#include <spdlog/sinks/rotating_file_sink.h>
+#include <spdlog/sinks/stdout_color_sinks.h>
+#include <spdlog/spdlog.h>
+
+#ifdef Q_OS_WIN
+#include <windows.h>
+#endif
+
+static QMutex msgMutex;
+static std::shared_ptr<spdlog::logger> logger;
+
+Util::Util()
+{
+}
+
+void Util::InitLogger(const QString& logPath, const QString& mark)
+{
+    auto file_sink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>(logPath.toStdString(), 1024 * 1024 * 50, 3);
+    auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
+    file_sink->set_pattern("[%Y-%m-%d %H:%M:%S.%e][%l]: %v");
+    console_sink->set_pattern("%^[%Y-%m-%d %H:%M:%S.%e][%l]: %v%$");
+    std::vector<spdlog::sink_ptr> sinks{file_sink, console_sink};
+    logger = std::make_shared<spdlog::logger>(mark.toStdString(), sinks.begin(), sinks.end());
+    logger->set_level(spdlog::level::debug);
+    spdlog::register_logger(logger);
+}
+
+void Util::ConsoleMsgHander(QtMsgType type, const QMessageLogContext& context, const QString& msg)
+{
+    Q_UNUSED(context);
+
+    switch (type) {
+    case QtDebugMsg:
+        logger->debug(msg.toStdString());
+        break;
+    case QtInfoMsg:
+        logger->info(msg.toStdString());
+        break;
+    case QtWarningMsg:
+        logger->warn(msg.toStdString());
+        break;
+    case QtCriticalMsg:
+        logger->error(msg.toStdString());
+        break;
+    case QtFatalMsg:
+        logger->critical(msg.toStdString());
+        break;
+    default:
+        logger->warn("Unknown QtMsgType type.");
+        break;
+    }
+}

Util/Util.h

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+#ifndef UTIL_H
+#define UTIL_H
+
+#include <QObject>
+
+class Util : public QObject
+{
+    Q_OBJECT
+public:
+    Util();
+
+public:
+    static void InitLogger(const QString& logPath, const QString& mark);
+    static void ConsoleMsgHander(QtMsgType type, const QMessageLogContext& context, const QString& msg);
+};
+
+#endif   // UTIL_H