xhttpd©是一个简单高效的HTTP Server，在Linux平台下C++语言开发，基于非阻塞IO和事件驱动，one loop per thread模型，利用epoll的ET模式，支持GET和POST方法、公共网关接口（CGI）、文件和目录的访问、404等错误处理，经过此过程练习所学的一些知识：http 协议、网络编程、I/O复用，多线程以及C++ 11新特性。
##开发记录
- 2015.5.24 添加多线程支持，手工指定线程数
- 2015.5.21 添加POST和CGI
- 2015.5.20 完成ApacheBench测试，性能还需要努力
- 2015.5.19 解决
ev.data.ptr数据传递 - 2015.5.18 异常处理，404
- 2015.5.15 模块集成和调试
- 2015.5.12 完成html的解析设计和实现
- 2015.5.5 出差一周，进行了非阻塞IO的学习，epoll的使用
- 2015.5.4 完成socket接口的封装
- 2015.5.1 准备活动，关于文件读取，缓冲区，log设计和实现
##功能和特点
- 支持GET、POST
- 支持CGI
- 支持文件和目录的访问
- 基于非阻塞IO和事件驱动
- epoll实现
- 多线程
- 支持403,404,500
- 不依赖第三方库
##性能测试
###ApacheBench测试
./ab -n 10000 -c 500 http://10.108.163.248:8080/
####xhttpd(太弱了:( )
This is ApacheBench, Version 2.3 <$Revision: 1638069 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 10.108.163.248 (be patient)
Completed 1000 requests
Completed 2000 requests
Completed 3000 requests
Completed 4000 requests
Completed 5000 requests
Completed 6000 requests
Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests
Server Software:
Server Hostname: 10.108.163.248
Server Port: 8080
Document Path: /
Document Length: 0 bytes
Concurrency Level: 500
Time taken for tests: 1.410 seconds
Complete requests: 10000
Failed requests: 543
(Connect: 0, Receive: 0, Length: 543, Exceptions: 0)
Non-2xx responses: 385
Total transferred: 4970000 bytes
HTML transferred: 236808 bytes
Requests per second: 7093.94 [#/sec] (mean)
Time per request: 70.483 [ms] (mean)
Time per request: 0.141 [ms] (mean, across all concurrent requests)
Transfer rate: 3443.05 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 17 96.3 5 1000
Processing: 9 41 50.2 27 365
Waiting: 7 39 50.9 24 365
Total: 14 58 112.5 33 1363
Percentage of the requests served within a certain time (ms)
50% 33
66% 40
75% 43
80% 44
90% 122
95% 205
98% 238
99% 242
100% 1363 (longest request)
####nginx
This is ApacheBench, Version 2.3 <$Revision: 1638069 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 10.108.163.248 (be patient)
Completed 1000 requests
Completed 2000 requests
Completed 3000 requests
Completed 4000 requests
Completed 5000 requests
Completed 6000 requests
Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests
Server Software: nginx/1.8.0
Server Hostname: 10.108.163.248
Server Port: 8081
Document Path: /
Document Length: 612 bytes
Concurrency Level: 500
Time taken for tests: 0.658 seconds
Complete requests: 10000
Failed requests: 0
Total transferred: 8440000 bytes
HTML transferred: 6120000 bytes
Requests per second: 15205.77 [#/sec] (mean)
Time per request: 32.882 [ms] (mean)
Time per request: 0.066 [ms] (mean, across all concurrent requests)
Transfer rate: 12532.88 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 2.3 0 15
Processing: 6 7 5.4 6 210
Waiting: 5 7 5.3 6 210
Total: 6 7 6.5 6 213
Percentage of the requests served within a certain time (ms)
50% 6
66% 6
75% 6
80% 6
90% 6
95% 21
98% 25
99% 25
100% 213 (longest request)