webbench 下载_WebBench
/** (C) Radim Kolar 1997-2004
* This is free software, see GNU Public License version 2 for
* details.
*
* Simple forking WWW Server benchmark:
*
* Usage:
* webbench --help
*
* Return codes:
* 0 - sucess
* 1 - benchmark failed (server is not on-line)
* 2 - bad param
* 3 - internal error, fork failed
**/#include"socket.c"#include#include#include#include#include#include#include
#define METHOD_GET 0
#define METHOD_HEAD 1
#define METHOD_OPTIONS 2
#define METHOD_TRACE 3
#define PROGRAM_VERSION "1.5"
#define REQUEST_SIZE 2048
/*values*/
volatile int timerexpired=0;//判断压测试时长是否已经达到设定时间
int speed=0;//进程成功得到服务器相应的数量
int failed=0;//失败的数量(speed代表成功，failed代表失败)
int bytes=0;//进程成功从服务器读取的字节数
/*globals*/
int http10=1; /*http版本，0代表http/0.9, 1代表http/1.0, 2代表http/1.1*/
/*请求方法：GET, HEAD, OPTIONS, TRACE*/
int method=METHOD_GET;//默认为GET方法
int clients=1; //发起请求的客户端数目，默认为1，可以通过-c/-client选项设置
int force=0; //是否需要等待读取从server返回的数据，0表示等待读取
int force_reload=0; //是否使用缓存，1表示不缓存，0表示缓存-----是否重新请求
int proxyport=80; //代理服务器端口号
char *proxyhost=NULL;//代理服务器IP，初始化为NULL
int benchtime=30; //压测时间，默认为30秒，可以通过-t/-time选项设置
/*internal*/
int mypipe[2];char host[MAXHOSTNAMELEN]; //服务器端ip
char request[REQUEST_SIZE]; //保存请求报文，(请求行，请求报头，空行，请求正文)
/*struct option {
const char *name;
int has_arg;
int *flag;
int val;
};
struct option结构体中元素解释如下：
1.const char *name; //选项名
2.int has_arg; //描述长选项是否有选项参数
has_arg有3个值，
符号常量 数值 含义
no_argument 0 表示该选项后面不跟参数值，
required_argument 1 表示该选项后面一定跟参数值，
optional_argument 2 表示该选项后面可以跟，也可以不跟参数值
3.int* flag; //用来决定，getopt_long()的返回值到底是什么，
如果flag为NULL，则函数会返回与该项option匹配的val值，
如果flag不是NULL，则将val值赋予flag所指向的内存，并且返回0
4.int val; //如果flag为NULL，那么val通常是个字符常量，
如果短选项与长选项一致，那么该字符就应该与optstring中出现的这个选项的参数相同*/
//struct option结构体初始化
static const struct option long_options[]={
{"force",no_argument,&force,1},
{"reload",no_argument,&force_reload,1},
{"time",required_argument,NULL,'t'},
{"help",no_argument,NULL,'?'},
{"http09",no_argument,NULL,'9'},
{"http10",no_argument,NULL,'1'},
{"http11",no_argument,NULL,'2'},
{"get",no_argument,&method,METHOD_GET},
{"head",no_argument,&method,METHOD_HEAD},
{"options",no_argument,&method,METHOD_OPTIONS},
{"trace",no_argument,&method,METHOD_TRACE},
{"version",no_argument,NULL,'V'},
{"proxy",required_argument,NULL,'p'},
{"clients",required_argument,NULL,'c'},
{NULL,0,NULL,0}
};/*prototypes*/
static void benchcore(const char* host,const int port, const char *request);static int bench(void);static void build_request(const char *url);/*信号处理函数，当测试时间完成时产生SIGALARM信号，，调用此函数，将timerexpried置为1，表示子进程需要退出
在后面的函数调用时会看到，在程序的while循环中会不断检测此值，只有timerexpired为1时，程序才会跳出while循环
并返回*/
static void alarm_handler(intsignal)
{
timerexpired=1;//timerexpired:判断压测时长是否已经达到设定时间
}/*usage函数：webbench用法介绍
-f|--force 不需要等待服务器响应
-r|--reload 发送重新加载请求
-t|--time 运行多长时间，单位是秒
-p|--proxy 使用代理服务器发送请求
-c|--clients 创建多少个客户端
-9|--http09 使用HTTP/0.9
-1|--http10 使用HTTP/1.0协议
-2|--http11 使用HTTP/1.1协议
--get 使用GET方法请求
--head 使用HEAD方法请求
--options 使用OPTIONS方法请求
--trace 使用TRACE方法请求
-?|-h|--help 打印帮助信息
-V|--version 显示版本号*/
static void usage(void)
{
fprintf(stderr,"webbench [option]... URL\n"
"-f|--force Don't wait for reply from server.\n"
"-r|--reload Send reload request - Pragma: no-cache.\n"
"-t|--time Run benchmark for seconds. Default 30.\n"
"-p|--proxy Use proxy server for request.\n"
"-c|--clients Run HTTP clients at once. Default one.\n"
"-9|--http09 Use HTTP/0.9 style requests.\n"
"-1|--http10 Use HTTP/1.0 protocol.\n"
"-2|--http11 Use HTTP/1.1 protocol.\n"
"--get Use GET request method.\n"
"--head Use HEAD request method.\n"
"--options Use OPTIONS request method.\n"
"--trace Use TRACE request method.\n"
"-?|-h|--help This information.\n"
"-V|--version Display program version.\n");
};int main(int argc, char *argv[])
{int opt=0;int options_index=0;char *tmp=NULL;if(argc==1)
{
usage();return 2;
}/*getopt_long函数
函数功能：用来解析命令行参数，参数argc和argv分别代表参数个数和内容，跟main函数里的命令行参数一样
int getopt_long(int argc, char* argv[], const char* optstring, const struct option* longopts, int* longindex);
参数optstring：为选项字符串，告诉getopt可以处理那个选项以及哪个选项需要参数，如果选项字符串里的字母接着冒号: ":"，
则表示还有相关的参数，全局变量optarg即会指向此额外参数，如果在处理期间遇到了不符合optstring指定的其它选项，
getopt将会显示一个错误消息，并将全局变量设置为"?"字符将全局变量设置为0则不会打印出错信息。
返回值：每次调用该函数，它都会分析一个选项，并且返回它的短选项，如果分析完毕，即没有选项了，则会返回-1*/
while((opt=getopt_long(argc,argv,"912Vfrt:p:c:?h",long_options,&options_index))!=EOF )
{/*#include
extern char* optarg;//选项的参数指针
extern int optind; //下一次调用getopt_long时，从optind存储的位置处重新开始检查选项
extern int opterr; //当opterr=0时，getopt_long不向stderr输出错误信息
extern int optopt; //当命令行选项字符不包括在optstring中或缺少必要参数时，该选项存储在optopt中，
getopt_long返回'?'*/
switch(opt)
{case 0 : break;case 'f': force=1;break;case 'r': force_reload=1;break;case '9': http10=0;break;case '1': http10=1;break;case '2': http10=2;break;case 'V': printf(PROGRAM_VERSION"\n");exit(0);case 't': benchtime=atoi(optarg);break; //optarg是选项的参数指针，-t选项后跟的是运行时长
case 'p': //返回字符'p'，说明使用代理服务器
/*proxy server parsing server:port*/
/*代理服务器解析：IP:Port eg: 192.168.237.128:8080*/tmp=strrchr(optarg,':');//tmp = ":8080"
proxyhost=optarg;if(tmp==NULL)
{break;
}if(tmp==optarg)//tmp == ":8080" == optorg 没有主机IP,只有端口号
{
fprintf(stderr,"Error in option --proxy %s: Missing hostname.\n",optarg);return 2;
}if(tmp==optarg+strlen(optarg)-1)//org == "192.168.237.128:" == tmp, 没有代理服务器端口号
{
fprintf(stderr,"Error in option --proxy %s Port number is missing.\n",optarg);return 2;
}*tmp='\0';//正常情况 tmp = ":8080" tmp+1 = "8080"
proxyport=atoi(tmp+1);break;case ':':case 'h':case '?': usage();return 2;break;//getopt_long在分析选项时，遇到一个没有定义过的选项，则返回值为'?'
case 'c': clients=atoi(optarg);break; //这时，optarg指向的参数信息是客户端数目
}
}if(optind==argc)
{
fprintf(stderr,"webbench: Missing URL!\n");
usage();return 2;
}if(clients==0)
clients=1;if(benchtime==0)
benchtime=60;/*Copyright*/fprintf(stderr,"Webbench - Simple Web Benchmark"PROGRAM_VERSION"\n""Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.\n");
build_request(argv[optind]);//argv[optind]=URL,构造请求报头
/*print bench info*/
//打印测试的相关信息
printf("\nBenchmarking:");switch(method)
{caseMETHOD_GET:default:
printf("GET");break;caseMETHOD_OPTIONS:
printf("OPTIONS");break;caseMETHOD_HEAD:
printf("HEAD");break;caseMETHOD_TRACE:
printf("TRACE");break;
}
printf("%s",argv[optind]);switch(http10)
{case 0: printf("(using HTTP/0.9)");break;case 2: printf("(using HTTP/1.1)");break;
}
printf("\n");if(clients==1)
printf("1 client");elseprintf("%d clients",clients);
printf(", running %d sec", benchtime);if(force)
printf(", early socket close");if(proxyhost!=NULL)
printf(", via proxy server %s:%d",proxyhost,proxyport);if(force_reload)
printf(", forcing reload");
printf(".\n");//核心代码
returnbench();
}//构造请求报头
void build_request(const char *url)
{char tmp[10];inti;/*int bzero(void* s, size_t n);将内存块(字符串s)中的前n个字节置为0，包括'\0'*/bzero(host,MAXHOSTNAMELEN);
bzero(request,REQUEST_SIZE);//设置http版本信息
if(force_reload && proxyhost!=NULL && http10<1) http10=1;if(method==METHOD_HEAD && http10<1) http10=1;if(method==METHOD_OPTIONS && http10<2) http10=2;if(method==METHOD_TRACE && http10<2) http10=2;//获得请求方法
switch(method)
{default:case METHOD_GET: strcpy(request,"GET");break;case METHOD_HEAD: strcpy(request,"HEAD");break;case METHOD_OPTIONS: strcpy(request,"OPTIONS");break;case METHOD_TRACE: strcpy(request,"TRACE");break;
}
strcat(request," ");if(NULL==strstr(url,"://"))
{
fprintf(stderr,"\n%s: is not a valid URL.\n",url);
exit(2);
}if(strlen(url)>1500)
{
fprintf(stderr,"URL is too long.\n");
exit(2);
}if(proxyhost==NULL)if (0!=strncasecmp("http://",url,7))
{
fprintf(stderr,"\nOnly HTTP protocol is directly supported, set --proxy for others.\n");
exit(2);
}/*protocol/host delimiter*/
//eg: url = "http://www.baidu.com/" --- i = 4-0+3 = 7 这时i指向第一个w的位置
i=strstr(url,"://")-url+3;/*printf("%d\n",i);*/
//此时url+i = "www.baidu.com/", 寻找'/'是否是url+i的子串，因为主机名必须以'/'结尾
if(strchr(url+i,'/')==NULL)
{
fprintf(stderr,"\nInvalid URL syntax - hostname don't ends with '/'.\n");
exit(2);
}if(proxyhost==NULL)//没有代理主机
{/*get port from hostname*/
/*index(s, c)函数返回c在s中第一次出现的位置*/
if(index(url+i,':')!=NULL && index(url+i,':')
{//eg：http://www.baidu.com/:8080 strchr(str，val)查找字符串str中首次出现val的位置//把url+i位置开始的21-0-7=14个字符赋值给host host=www.baidu.com/
strncpy(host,url+i,strchr(url+i,':')-url-i);//清空tmp的前10个字节位置
bzero(tmp,10);//将端口号放到tmp中去
strncpy(tmp,index(url+i,':')+1,strchr(url+i,'/')-index(url+i,':')-1);/*printf("tmp=%s\n",tmp);*/proxyport=atoi(tmp); //将端口号赋值给roxyport
if(proxyport==0) proxyport=80;
}else//没有端口号 eg:http://www.baidu.com/
{
strncpy(host,url+i,strcspn(url+i,"/"));
}//printf("Host=%s\n",host);//#############################################//why here using request+strlen(request)?
strcat(request+strlen(request),url+i+strcspn(url+i,"/"));
}else //有代理主机
{//printf("ProxyHost=%s\nProxyPort=%d\n",proxyhost,proxyport);
strcat(request,url);
}if(http10==1)
strcat(request,"HTTP/1.0");else if (http10==2)
strcat(request,"HTTP/1.1");
strcat(request,"\r\n");if(http10>0)
strcat(request,"User-Agent: WebBench"PROGRAM_VERSION"\r\n");if(proxyhost==NULL && http10>0)
{
strcat(request,"Host:");
strcat(request,host);
strcat(request,"\r\n");
}if(force_reload && proxyhost!=NULL)
{
strcat(request,"Pragma: no-cache\r\n");
}//添加Connection:close连接为短连接，一次连接即时关闭
if(http10>1)
strcat(request,"Connection: close\r\n");/*add empty line at end*/
//添加空行
if(http10>0)
strcat(request,"\r\n");//printf("Req=%s\n",request);
}/*vraci system rc error kod*/
static int bench(void)
{inti,j,k;
pid_t pid=0;
FILE*f;/*check avaibility of target server*/
//调用socket.c代码，建立一次TCP连接
i=Socket(proxyhost==NULL?host:proxyhost,proxyport);if(i<0)
{
fprintf(stderr,"\nConnect to server failed. Aborting benchmark.\n");return 1;
}//why close i?
close(i);/*create pipe*/
if(pipe(mypipe))
{
perror("pipe failed.");return 3;
}/*not needed, since we have alarm() in childrens*/
/*wait 4 next system clock tick*/
/*cas=time(NULL);
while(time(NULL)==cas)
sched_yield();*/
/*fork childs*/
//fork出clients个子进程
for(i=0;i
{
pid=fork();if(pid <= (pid_t) 0)
{/*child process or error*/sleep(1); /*make childs faster*/
break;
}
}if( pid< (pid_t) 0)
{
fprintf(stderr,"problems forking worker no. %d\n",i);
perror("fork failed.");return 3;
}if(pid== (pid_t) 0)
{/*I am a child*/
if(proxyhost==NULL)
benchcore(host,proxyport,request);elsebenchcore(proxyhost,proxyport,request);/*write results to pipe*/
//子进程把测试结果输出到管道
f=fdopen(mypipe[1],"w");if(f==NULL)
{
perror("open pipe for writing failed.");return 3;
}/*fprintf(stderr,"Child - %d %d\n",speed,failed);*/fprintf(f,"%d %d %d\n",speed,failed,bytes);
fclose(f);return 0;
}else//如果是父进程，从管道读出数据，并汇总数据信息
{
f=fdopen(mypipe[0],"r");if(f==NULL)
{
perror("open pipe for reading failed.");return 3;
}//设置缓冲区，_IONBF表示没有缓存
setvbuf(f,NULL,_IONBF,0);
speed=0;
failed=0;
bytes=0;while(1)
{
pid=fscanf(f,"%d %d %d",&i,&j,&k);if(pid<2)
{
fprintf(stderr,"Some of our childrens died.\n");break;
}
speed+=i;
failed+=j;
bytes+=k;/*fprintf(stderr,"*Knock* %d %d read=%d\n",speed,failed,pid);*/
//记录读了多少个子进程的数据，读完就退出
if(--clients==0)break;
}
fclose(f);//将结果打印在屏幕上
printf("\nSpeed=%d pages/min, %d bytes/sec.\nRequests: %d susceed, %d failed.\n",\
(int)((speed+failed)/(benchtime/60.0f)),\
(int)(bytes/(float)benchtime),speed,failed);
}returni;
}void benchcore(const char *host,const int port,const char *req)
{intrlen;char buf[1500];//保存服务器的响应报文
ints,i;structsigaction sa;/*setup alarm signal handler 注册SIGARALM信号的信号处理函数*/sa.sa_handler=alarm_handler;
sa.sa_flags=0;if(sigaction(SIGALRM,&sa,NULL))
exit(3);
alarm(benchtime);//设置闹钟，超时发送SIGARALM信号
rlen=strlen(req); //计算请求报文的长度
nexttry:while(1)
{if(timerexpired)//一旦超时，则返回
{if(failed>0)
{/*fprintf(stderr,"Correcting failed by signal\n");*/failed--;
}return;
}
s=Socket(host,port);if(s<0)
{
failed++;continue;
}//向服务器发出请求
if(rlen!=write(s,req,rlen))
{
failed++;
close(s);continue;
}if(http10==0) //针对http0.9做的特殊处理
if(shutdown(s,1)) //调用shutdown函数使客户端不能呢向服务器发送请求，成功-->0，失败-->-1
{
failed++;
close(s);continue;
}if(force==0) //force==0 等待从server返回的数据
{/*read all available data from socket*/
while(1)
{if(timerexpired)break;
i=read(s,buf,1500);//读取从服务器返回的数据，保存到buf中
/*fprintf(stderr,"%d\n",i);*/
if(i<0)
{
failed++;
close(s);gotonexttry;
}else
if(i==0)break;elsebytes+=i;
}
}if(close(s))
{
failed++;continue;
}
speed++;
}
}