# SimpleHttpServer
1. 本项目实现了一个基于线程池 + 非阻塞socket + epoll (ET和LT均实现) + 事件处理(Reactor) 的并发模型,传输层使用IO多路复用技术管理TCP连接,同时在应用层搭建了HTTP服务器,同时支持长连接和短连接,能主动断开不活跃的长连接,使用状态机解析HTTP请求报文,支持GET请求,能返回图片视频等静态资源,同时使用cgi脚本处理POST请求,并支持文件上传;
2. 线程间的工作模式:主线程负责Accept请求,然后采用Round-bin方式异步调用线程池中的其他线程去管理请求的IO事件。利用eventfd(内部是一个计数器)实现线程间异步唤醒。IO请求事件会被分发到固定的队列中,由负责管理该IO请求的子线程来取走,需要用到互斥锁(主线程放,子线程取。锁由特定线程的Eventloop类创建,只会被该线程和主线程竞争);
3. 单例模式的异步日志:用专门的一个线程负责收集后端buffer日志信息并将其写入磁盘,其他业务只负责生存日志信息,存到前台日志buffer里。刷盘策略:前台日志buffer满(前后端buffer互换)或者距离上次刷盘过了3秒,notify日志线程来刷盘。(每条日志都是临时类,在析构函数里将内容写入前台buffer,要加互斥锁保证日志信息的同步性);
4. 定时器:用的优先队列,选择小根堆模式。插入一个定时器O(logN),pop一个定时器O(1),但是需要调整堆,故删除一个定时器O(logN)。
----------
## Start
>**sh build.sh**
>.**/Run [-p port] [-l log\_name] [-t thread\_num] [-a listen\_mode] [-b connect\_mode]**
- -p,自定义端口号.默认8888
- -l,日志文件名, 默认WebServer
- -t,线程池中的线程数量, 默认为4
- -a,监听套接字模式,0代表LT模式,1代表ET模式
- -b,连接套接字模式,0代表LT模式,1代表ET模式
## Pressure testing
使用Webbench对服务器进行压力测试,对listenfd和connfd分别采用ET和LT模式
LT+LT
![avatar](https://raw.githubusercontent.com/Huangggjian/SimpleHttpServer/master/imgs/a0b0.png)
LT+ET
![avatar](https://raw.githubusercontent.com/Huangggjian/SimpleHttpServer/master/imgs/a0b1.png)
ET+LT
![avatar](https://raw.githubusercontent.com/Huangggjian/SimpleHttpServer/master/imgs/a1b0.png)
ET+ET
![avatar](https://raw.githubusercontent.com/Huangggjian/SimpleHttpServer/master/imgs/a1b1.png)
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Linux项目是一个开放源代码的操作系统项目,由林纳斯·托瓦兹(Linus Torvalds)于1991年首次发布。该项目以Linux内核为核心,围绕其构建了一个完整的操作系统,包括各种系统工具、库、应用程序和硬件支持。 以下是Linux项目的一些主要特点和资料介绍: 开放源代码:Linux项目的所有源代码都是公开的,并允许任何人自由使用和修改。这为开发者提供了极大的灵活性和创新能力,同时也促进了全球范围内的协作和发展。 跨平台性:Linux操作系统可以在多种硬件架构和平台上运行,包括x86、ARM、MIPS等。这使得Linux成为了一种非常灵活的操作系统,适用于各种设备和应用场景。 可定制性:由于Linux的源代码是公开的,用户可以根据自己的需求进行定制和修改。这使得Linux成为了一种非常适合企业级应用的操作系统,可以根据企业的特定需求进行定制和优化。 安全性:Linux操作系统在安全性方面表现出色,具有强大的访问控制和安全机制。这使得Linux成为了一种非常适合用于服务器和安全敏感的应用场景的操作系统。
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