Qt+QtWebApp开发笔记（二）：http服务器日志系统介绍、添加日志系统至Demo测试

include(../QtWebApp/QtWebApp/logging/logging.pri)

[logging]
minLevel=WARNING
bufferSize=100
fileName=../logs/webapp1.log
maxSize=1000000
maxBackups=2
timestampFormat=dd.MM.yyyy hh:mm:ss.zzz
msgFormat={timestamp} {typeNr} {type} {thread} {msg}

{file}：Filename of source code where the message was generated
{function}：Function where the message was generated
{line}：Line number where the message was generated

qCritical("An error occured in {file}: out of disk space");

#include "httpessionstore.h"
#include "staticfilecontroller.h"
#include "templatecache.h"
#include "filelogger.h"

using namespace stefanfrings;

/** Storage for session cookies */
extern HttpSessionStore* sessionStore;

/** Controller for static files */
extern StaticFileController* staticFileController;

/** Cache for template files */
extern TemplateCache* templateCache;

/** Redirects log messages to a file */
extern FileLogger* logger;

#endif // GLOBAL_H

#include "global.h"

HttpSessionStore* sessionStore;
StaticFileController* staticFileController;
TemplateCache* templateCache;
FileLogger* logger;

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    QString configFileName=searchConfigFile();

    // Configure logging
    QSettings* logSettings=new QSettings(configFileName,QSettings::IniFormat,&app);
    logSettings->beginGroup("logging");
    logger=new FileLogger(logSettings,10000,&app);
    logger->installMsgHandler();

    // Log the library version
    qDebug("QtWebApp has version %s",getQtWebAppLibVersion());

    // Session store
    QSettings* sessionSettings=new QSettings(configFileName,QSettings::IniFormat,&app);
    sessionSettings->beginGroup("sessions");
    sessionStore=new HttpSessionStore(sessionSettings,&app);

    // Static file controller
    QSettings* fileSettings=new QSettings(configFileName,QSettings::IniFormat,&app);
    fileSettings->beginGroup("files");
    staticFileController=new StaticFileController(fileSettings,&app);

    // Configure template cache
    QSettings* templateSettings=new QSettings(configFileName,QSettings::IniFormat,&app);
    templateSettings->beginGroup("templates");
    templateCache=new TemplateCache(templateSettings,&app);

    // HTTP server
    QSettings* listenerSettings=new QSettings(configFileName,QSettings::IniFormat,&app);
    listenerSettings->beginGroup("listener");
    new HttpListener(listenerSettings,new RequestMapper(&app),&app);

    return app.exec();
}

void RequestMapper::service(HttpRequest& request, HttpResponse& response) {
    QByteArray path=request.getPath();
    qDebug("RequestMapper: path=%s",path.data());
    HttpSession session=sessionStore->getSession(request,response,false);
    QString username=session.get("username").toString();
    logger->set("currentUser",username);
    ...
}

msgFormat={timestamp} {typeNr} {type} {thread} User:{currentUser} {msg}

void RequestMapper::service(HttpRequest& request, HttpResponse& response) {
    ...
    else {
        response.setStatus(404,"Not found");
        response.write("The URL is wrong, no such document.");
    }

    qDebug("RequestMapper: finished request");
    logger->clear(true,true);
}

minLevel=INFO
bufferSize=0

minLevel=ERROR (or WARNING)
bufferSize=100

# logging模块，QtWebApp自带的三方模块
include ($$PWD/modules/logging/logging.pri)

#ifndef HTTPSERVERMANAGER_H
#define HTTPSERVERMANAGER_H

#include <QObject>
#include <QMutex>

#include "httplistener.h"
#include "filelogger.h"

#include "HelloWorldRequestHandler.h"

class HttpServerManager : public QObject
{
    Q_OBJECT
private:
    explicit HttpServerManager(QObject *parent = 0);

public:
    static HttpServerManager *getInstance();

public slots:
    void slot_start();                              // 开启线程
    void slot_stop();                               // 停止线程

private:
    static HttpServerManager *_pInstance;
    static QMutex _mutex;

private:
    bool _running;                                  // 运行状态

private:
    HttpListener *_pHttpListener;                   // http服务监听器
    QSettings *_pHttpListenerSettings;              // http服务器配置文件

    FileLogger *_pFileLogger;                       // 日志记录
    QSettings *_pFileLoggerSettings;                // 日志配置文件

private:
    QString _ip;                // 服务器监听ip（若为空，则表示监听所有ip）
    quint16 _port;              // 服务器监听端口
    int _minThreads;            // 空闲最小线程数
    int _maxThreads;            // 负载最大线程数
    int _cleanupInterval;       // 空线程清空间隔（单位：毫秒）
    int _readTimeout;           // 保持连接空载超时时间（单位：毫秒）
    int _maxRequestSize;        // 最大请求数
    int _maxMultiPartSize;      // 上载文件最大数（单位：字节）
};


#endif // HTTPSERVERMANAGER_H

#include "HttpServerManager.h"
#include <QApplication>

#include <QDir>

#include <QDebug>
#include <QDateTime>
//#define LOG qDebug()<<__FILE__<<__LINE__
//#define LOG qDebug()<<__FILE__<<__LINE__<<__FUNCTION__
//#define LOG qDebug()<<__FILE__<<__LINE__<<QThread()::currentThread()
//#define LOG qDebug()<<__FILE__<<__LINE__<<QDateTime::currentDateTime().toString("yyyy-MM-dd")
#define LOG qDebug()<<__FILE__<<__LINE__<<QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss:zzz")

HttpServerManager *HttpServerManager::_pInstance = 0;
QMutex HttpServerManager::_mutex;

HttpServerManager::HttpServerManager(QObject *parent)
    : QObject(parent),
      _pHttpListener(0),
      _pHttpListenerSettings(0),
      _pFileLogger(0),
      _pFileLoggerSettings(0),
      _running(false),
      _port(8088),
      _minThreads(2),
      _maxThreads(10),
      _cleanupInterval(60000),
      _readTimeout(60000),
      _maxRequestSize(100),
      _maxMultiPartSize(1024*1024*1024)
{

}

HttpServerManager *HttpServerManager::getInstance()
{
    if(!_pInstance)
    {
        QMutexLocker lock(&_mutex);
        if(!_pInstance)
        {
            _pInstance = new HttpServerManager();
        }
    }
    return _pInstance;
}

void HttpServerManager::slot_start()
{
    if(_running)
    {
        LOG << "It's running!!!";
        return;
    }
    _running = true;
    LOG << "Succeed to run";

    QString httpServerPath = QString("%1/etc/httpServer.ini").arg(qApp->applicationDirPath());
    LOG << httpServerPath << "exit:" << QFile::exists(httpServerPath);

    // 启动日志几里路
    {
        if(!_pFileLoggerSettings)
        {
            _pFileLoggerSettings = new QSettings(httpServerPath, QSettings::IniFormat);
        }
        _pFileLoggerSettings->beginGroup("logging");

        // 日志不会主动创建文件夹，这里需要补全
        {
            QFileInfo fileInfo(httpServerPath);
            QString dirPath = fileInfo.dir().absolutePath();
            dirPath = QString("%1/%2")
                    .arg(dirPath)
                    .arg(_pFileLoggerSettings->value("fileName").toString());
            dirPath = dirPath.mid(0, dirPath.lastIndexOf("/"));
            QDir dir;
            dir.mkpath(dirPath);
        }
        _pFileLogger = new FileLogger(_pFileLoggerSettings);
        _pFileLogger->installMsgHandler();
    }

    // 启动http的监听
    {
        if(!_pHttpListenerSettings)
        {
            _pHttpListenerSettings = new QSettings(httpServerPath, QSettings::IniFormat);
        }
        _pHttpListenerSettings->beginGroup("listener");
        _pHttpListener = new HttpListener(_pHttpListenerSettings, new HelloWorldRequestHandler);
    }
    LOG;
}

void HttpServerManager::slot_stop()
{
    if(!_running)
    {
        LOG <<"It's not running!!!";
        return;
    }
    _running = false;
    LOG << "Succeed to stop";
}