libevent服务器附带qt界面开发（附带源码）
https://i-blog.csdnimg.cn/direct/fd083ec0db9d46b8bd4d3a6a3ba08946.png1.重要功能有登录界面
2.基于libevent实现的服务器的业务功能
利用qt编译libevent
下载这个，其他版本也可以
重要是github上下载，可能有点卡
链接: link
https://i-blog.csdnimg.cn/direct/d329a3dfb0ec4bdb96417725f286e93a.png
https://i-blog.csdnimg.cn/direct/e63823309ecf492ca7f8b5533c3b1578.png
编译流程
1.打开qt然后点下面的红框
https://i-blog.csdnimg.cn/direct/0e8cc1926204483ca25c1fe05f0653ad.png
2.选cmakelist
https://i-blog.csdnimg.cn/direct/2b642ff32e9943edb243d13626daa1c2.png
3.选编译器https://i-blog.csdnimg.cn/direct/19997cd075e843e6b2aef4e001dfe1c0.png
4.最后一步编译
https://i-blog.csdnimg.cn/direct/c0414b59638d41b5bd7c6c1b6efc0891.png
5.编译乐成后库的位置
https://i-blog.csdnimg.cn/direct/01fb8e52e9e147ba969d07573d067f4c.png
https://i-blog.csdnimg.cn/direct/d2671b02eb6b4bc48d98d3cc7b967c77.png
最后编译乐成后可以丢到/usr/bin里也可以丢到自己的写的步伐的目次下
源码
源码布局如下
https://i-blog.csdnimg.cn/direct/58044182cc2c4916bf24fc5c85f885d8.png
下面是libeventuse.cpp
#include "libeventuse.h"
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <signal.h>
#ifndef _WIN32
#include <netinet/in.h>
# ifdef _XOPEN_SOURCE_EXTENDED
#include <arpa/inet.h>
# endif
#include <sys/socket.h>
#endif
#include <event2/bufferevent.h>
#include <event2/buffer.h>
#include <event2/listener.h>
#include <event2/util.h>
#include <event2/event.h>
#include"qdebug.h"
static const char MESSAGE[] = "Hello, World!\n";
static const unsigned short PORT = 9995;
static void listener_cb(struct evconnlistener *, evutil_socket_t,
struct sockaddr *, int socklen, void *);
static void conn_writecb(struct bufferevent *, void *);
static void conn_eventcb(struct bufferevent *, short, void *);
static void signal_cb(evutil_socket_t, short, void *);
int main3()
{
struct event_base *base;
struct evconnlistener *listener;
struct event *signal_event;
struct sockaddr_in sin = {0};
base = event_base_new();//初始化
if (!base) {
fprintf(stderr, "Could not initialize libevent!\n");
return 1;
}
sin.sin_family = AF_INET;
sin.sin_port = htons(PORT);
listener = evconnlistener_new_bind(base, listener_cb, (void *)base,
LEV_OPT_REUSEABLE|LEV_OPT_CLOSE_ON_FREE, -1,
(struct sockaddr*)&sin,
sizeof(sin));//事件监听
if (!listener) {
fprintf(stderr, "Could not create a listener!\n");
return 1;
}
signal_event = evsignal_new(base, SIGINT, signal_cb, (void *)base);//信号事件
if (!signal_event || event_add(signal_event, NULL)<0) {
fprintf(stderr, "Could not create/add a signal event!\n");
return 1;
}
event_base_dispatch(base);//启动
evconnlistener_free(listener);
event_free(signal_event);
event_base_free(base);
printf("done\n");
return 0;
}
static void
listener_cb(struct evconnlistener *listener, evutil_socket_t fd,
struct sockaddr *sa, int socklen, void *user_data)
{
struct event_base *base = static_cast<event_base*>(user_data);
struct bufferevent *bev;
bev = bufferevent_socket_new(base, fd, BEV_OPT_CLOSE_ON_FREE);
if (!bev) {
fprintf(stderr, "Error constructing bufferevent!");
event_base_loopbreak(base);
return;
}
bufferevent_setcb(bev, NULL, conn_writecb, conn_eventcb, NULL);
bufferevent_enable(bev, EV_WRITE);
bufferevent_disable(bev, EV_READ);
bufferevent_write(bev, MESSAGE, strlen(MESSAGE));
}
static void
conn_writecb(struct bufferevent *bev, void *user_data)
{
struct evbuffer *output = bufferevent_get_output(bev);
if (evbuffer_get_length(output) == 0) {
printf("flushed answer\n");
bufferevent_free(bev);
}
}
static void
conn_eventcb(struct bufferevent *bev, short events, void *user_data)
{
if (events & BEV_EVENT_EOF) {
printf("Connection closed.\n");
} else if (events & BEV_EVENT_ERROR) {
printf("Got an error on the connection: %s\n",
strerror(errno));/*XXX win32*/
}
/* None of the other events can happen here, since we haven't enabled
* timeouts */
bufferevent_free(bev);
}
static void
signal_cb(evutil_socket_t sig, short events, void *user_data)
{
struct event_base *base = static_cast<event_base*>(user_data);
struct timeval delay = { 2, 0 };
printf("Caught an interrupt signal; exiting cleanly in two seconds.\n");
event_base_loopexit(base, &delay);
}
libeventuse::libeventuse()
{
main3();
}
下面是mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "ui_form.h"
#include"QString"
#include"qdebug.h"
#include"qmessagebox.h"
#include"libeventuse.h"
#include <QMutex>
#include <QTime>
#include <QWidget>
WorkThread::WorkThread(QObject *parent) : QThread(parent) {}
void WorkThread::run() {// 必须实现 run()
libeventuse tmp;
emit this->server_finish();
}
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
login_win=new Form;
workthread=new WorkThread;
login_win->hide();//登录窗口打开
workthread->start();
connect(this->workthread,&WorkThread::server_finish,[=](){
qDebug()<<"服务器关闭";
});
connect(this->workthread,&WorkThread::finished,this->workthread,&QObject::deleteLater);
connect(this->login_win,&Form::back,[=](){//槽函数
this->show();//返回登录界面
this->login_win->hide();//主执行界面关闭
});
}
MainWindow::~MainWindow()
{
delete login_win;
delete ui;
}
Form::Form(QWidget *parent) :
QWidget(parent),
ui(new Ui::Form)
{
ui->setupUi(this);
}
Form::~Form()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
QString RootName=ui->rootName->text();
QString Password=ui->password->text();
if(RootName.size()==0)
{
QMessageBox::information(this, tr("提示"), tr("用户名没有输入"));
return ;
}
else if(RootName.size()==0)
{
QMessageBox::information(this, tr("提示"), tr("密码没有输入"));
}
if(RootName=="i"&&Password=="1")//验证用户和密码
{
qDebug()<<RootName<<Password;
login_win->show();//主执行界面打开
this->hide();//登录界面关闭
}
else
{
QMessageBox::information(this, tr("提示"), tr("用户或密码输入错误"));
}
}
void Form::on_pushButton_clicked()
{
emit this->back();//发送信号
}
void MainWindow::on_pushButton_2_clicked()
{
}
下面是libeventuse.h
#ifndef LIBEVENTUSE_H
#define LIBEVENTUSE_H
class libeventuse
{
public:
libeventuse();
};
#endif // LIBEVENTUSE_H
下面是mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class Form;
}
class Form : public QWidget
{
Q_OBJECT
public:
explicit Form(QWidget *parent = 0);
~Form();
private slots:
void on_pushButton_clicked();
signals:
void back();
private:
Ui::Form *ui;
};
#include <QThread>
class WorkThread : public QThread {
Q_OBJECT// 必须添加！！！
public:
explicit WorkThread(QObject *parent = nullptr);
protected:
void run() override;// 虚函数声明
signals:
void WorkThread_signal(int b);//自定义的信号
void server_finish();
};
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
Form* login_win=nullptr;
WorkThread*workthread=nullptr;
private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
pro文件的设置
https://i-blog.csdnimg.cn/direct/ee3b93b8662a41a089a9ebd6f4ad3593.png
演示视频
20250415_153450
我视频第一部门展示了怎样在qt创建窗口
视频第二部门展示了客户端连接到服务器后会接收到hello world
视频等考核过了我再放上来
考核没过我就发效果图
https://i-blog.csdnimg.cn/direct/404c36c0d5304340861ee8becca427ea.png
qt的一些知识
https://i-blog.csdnimg.cn/direct/cb36bf3b91c641b4ba4527059bed3ae9.png
1.信号的格式
signals:
void WorkThread_signal(int b);//自定义的信号
2.注意事项，需要分写入Q_OBJECT才能这么定义
3.信号发送利用 emit 发送
https://i-blog.csdnimg.cn/direct/09e6f979e2c042e1a5422c640faffdac.png
4.利用connect槽函数来绑定信号要处理的逻辑
https://i-blog.csdnimg.cn/direct/c6704f718b5043ac8a1af8944eabb0a4.png
免责声明：如果侵犯了您的权益，请联系站长，我们会及时删除侵权内容，谢谢合作！更多信息从访问主页：qidao123.com:ToB企服之家，中国第一个企服评测及商务社交产业平台。
页:
[1]