Webbench源代码分析(转载)
转载地址 http://blog.csdn.net/kangroger/article/details/42500703
Web Bench是一个网站压力测试的工具。其最后更新时间是2004年,已经十年多了。其源代码总共才500多行,全部使用C语言编写,最多可以模拟上万个并发连接。
其原理也比较简单,就是使用fork创建子进程,通过子进程来测试http连接,把测试结果写到管道,再有父进程读取管道信息来计算测试结果。流程图下:
其源代码有2个文件组成
socket.c是创建socket连接的。主要的代码在webbench.c中。
webbench.c中有几个主要的函数。
static void usage(void)是在使用出错时提示怎么使用本程序。
void build_request(const char *url)是用来创建http连接请求的。
static int bench(void)中创建管道和子进程,调用测试http函数。
void benchcore(const char *host,const int port,const char *req)对http请求进行测试。
socket.c源代码及注释:
- /* $Id: socket.c 1.1 1995/01/01 07:11:14 cthuang Exp $
- *
- * This module has been modified by Radim Kolar for OS/2 emx
- */
- /***********************************************************************
- module: socket.c
- program: popclient
- SCCS ID: @(#)socket.c 1.5 4/1/94
- programmer: Virginia Tech Computing Center
- compiler: DEC RISC C compiler (Ultrix 4.1)
- environment: DEC Ultrix 4.3
- description: UNIX sockets code.
- ***********************************************************************/
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <fcntl.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- #include <netdb.h>
- #include <sys/time.h>
- #include <string.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <stdarg.h>
- /***********
- 功能:通过地址和端口建立网络连接
- @host:网络地址
- @clientPort:端口
- Return:建立的socket连接。
- 如果返回-1,表示建立连接失败
- ************/
- int Socket(const char *host, int clientPort)
- {
- int sock;
- unsigned long inaddr;
- struct sockaddr_in ad;
- struct hostent *hp;
- memset(&ad, 0, sizeof(ad));
- ad.sin_family = AF_INET;
- inaddr = inet_addr(host);//将点分的十进制的IP转为无符号长整形
- if (inaddr != INADDR_NONE)
- memcpy(&ad.sin_addr, &inaddr, sizeof(inaddr));
- else//如果host是域名
- {
- hp = gethostbyname(host);//用域名获取IP
- if (hp == NULL)
- return -1;
- memcpy(&ad.sin_addr, hp->h_addr, hp->h_length);
- }
- ad.sin_port = htons(clientPort);
- sock = socket(AF_INET, SOCK_STREAM, 0);
- if (sock < 0)
- return sock;
- //连接
- if (connect(sock, (struct sockaddr *)&ad, sizeof(ad)) < 0)
- return -1;
- return sock;
- }
wenbench.c源代码及注释
- /*
- * (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 <unistd.h>
- #include <sys/param.h>
- #include <rpc/types.h>
- #include <getopt.h>
- #include <strings.h>
- #include <time.h>
- #include <signal.h>
- /* values */
- volatile int timerexpired=0;
- int speed=0;
- int failed=0;
- int bytes=0;
- /* globals */
- //http协议的版本号
- int http10=1; /* 0 - http/0.9, 1 - http/1.0, 2 - http/1.1 */
- /* Allow: GET, HEAD, OPTIONS, TRACE */
- #define METHOD_GET 0
- #define METHOD_HEAD 1
- #define METHOD_OPTIONS 2
- #define METHOD_TRACE 3
- #define PROGRAM_VERSION "1.5"
- int method=METHOD_GET;//全局变量,指定http方法
- int clients=1;//并发数
- int force=0;//是否等待服务器应答。默认为不等待
- int force_reload=0;
- int proxyport=80;//代理服务器端口号。默认为80
- char *proxyhost=NULL;//代理服务器的地址
- int benchtime=30;//运行多久。默认为30s。可以通过-t指定
- /* internal */
- int mypipe[2];
- char host[MAXHOSTNAMELEN];
- #define REQUEST_SIZE 2048
- char request[REQUEST_SIZE];
- //struct option结构体,配合getopt_long函数使用
- 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);
- static void alarm_handler(int signal)
- {
- timerexpired=1;
- }
- /**************
- 程序使用方法
- ***************/
- 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 <sec> Run benchmark for <sec> seconds. Default 30.\n"
- " -p|--proxy <server:port> Use proxy server for request.\n"
- " -c|--clients <n> Run <n> 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)//使用方法不合适
- {
- usage();
- return 2;
- }
- //检查输入参数,并设置对应选项
- while((opt=getopt_long(argc,argv,"912Vfrt:p:c:?h",long_options,&options_index))!=EOF )
- {
- 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);//输入版本号
- case 't': benchtime=atoi(optarg);break; //optarg表示命令后的参数,例如-c 100,optarg为100。
- //atoi表示把字符串转换成长整型。
- case 'p':
- /* proxy server parsing server:port */
- tmp=strrchr(optarg,':');
- proxyhost=optarg;//设定地址
- if(tmp==NULL)
- {
- break;
- }
- if(tmp==optarg)
- {
- fprintf(stderr,"Error in option --proxy %s: Missing hostname.\n",optarg);
- return 2;
- }
- if(tmp==optarg+strlen(optarg)-1)
- {
- fprintf(stderr,"Error in option --proxy %s Port number is missing.\n",optarg);
- return 2;
- }
- *tmp='\0';
- proxyport=atoi(tmp+1);break;//重设端口号
- case ':':
- case 'h':
- case '?': usage();return 2;break;
- case 'c': clients=atoi(optarg);break;//并发数
- }
- }
- //optind为对应参数的下标位置
- 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"
- );
- //使用中,最后为URL,所以optind应该是URL的位置
- build_request(argv[optind]);
- /* print bench info */
- printf("\nBenchmarking: ");
- switch(method)
- {
- case METHOD_GET:
- default:
- printf("GET");break;
- case METHOD_OPTIONS:
- printf("OPTIONS");break;
- case METHOD_HEAD:
- printf("HEAD");break;
- case METHOD_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");
- else
- printf("%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");
- return bench();
- }
- /****************
- 创建URL请求连接
- @url:url地址
- 创建好的请求放在全局变量request中
- ****************/
- void build_request(const char *url)
- {
- char tmp[10];
- int i;
- //请求地址和请求连接清零
- bzero(host,MAXHOSTNAMELEN);
- bzero(request,REQUEST_SIZE);
- 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;
- 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,"://"))//找“://”在URL中的位置
- {
- fprintf(stderr, "\n%s: is not a valid URL.\n",url);
- exit(2);
- }
- if(strlen(url)>1500)//url是否太长
- {
- fprintf(stderr,"URL is too long.\n");
- exit(2);
- }
- if(proxyhost==NULL)//代理服务器是否为空
- if (0!=strncasecmp("http://",url,7)) //比较前7个字符串
- { fprintf(stderr,"\nOnly HTTP protocol is directly supported, set --proxy for others.\n");
- exit(2);
- }
- /* protocol/host delimiter */
- i=strstr(url,"://")-url+3;//i指向http://后第一个位置
- /* printf("%d\n",i); */
- if(strchr(url+i,'/')==NULL) {
- fprintf(stderr,"\nInvalid URL syntax - hostname don't ends with '/'.\n");
- exit(2);
- }
- if(proxyhost==NULL)
- {
- /* get port from hostname */
- if(index(url+i,':')!=NULL &&
- index(url+i,':')<index(url+i,'/'))//判断url中是否指定了端口号
- {
- strncpy(host,url+i,strchr(url+i,':')-url-i);//取出主机地址
- bzero(tmp,10);
- strncpy(tmp,index(url+i,':')+1,strchr(url+i,'/')-index(url+i,':')-1);
- /* printf("tmp=%s\n",tmp); */
- proxyport=atoi(tmp);//端口号转换为int
- if(proxyport==0) proxyport=80;
- } else
- {
- strncpy(host,url+i,strcspn(url+i,"/"));
- }
- // printf("Host=%s\n",host);
- strcat(request+strlen(request),url+i+strcspn(url+i,"/"));
- } else
- {
- // printf("ProxyHost=%s\nProxyPort=%d\n",proxyhost,proxyport);
- strcat(request,url);
- }
- if(http10==1)//版本号
- 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");
- }
- if(http10>1)
- strcat(request,"Connection: close\r\n");
- /* add empty line at end */
- if(http10>0) strcat(request,"\r\n");
- // printf("Req=%s\n",request);
- }
- /* vraci system rc error kod */
- /**********************
- 创建管道和子进程,对http请求进行测试
- **********************/
- static int bench(void)
- {
- int i,j,k;
- pid_t pid=0;
- FILE *f;
- /* check avaibility of target server */
- i=Socket(proxyhost==NULL?host:proxyhost,proxyport);
- if(i<0) {
- fprintf(stderr,"\nConnect to server failed. Aborting benchmark.\n");
- return 1;
- }
- 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 */
- for(i=0;i<clients;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)//是否使用proxyhost
- benchcore(host,proxyport,request);
- else
- benchcore(proxyhost,proxyport,request);
- /* write results to pipe */
- 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);//把每个子进程运行的结果放到管道。
- fclose(f);
- return 0;
- } else
- {
- f=fdopen(mypipe[0],"r");
- if(f==NULL)
- {
- perror("open pipe for reading failed.");
- return 3;
- }
- setvbuf(f,NULL,_IONBF,0);
- speed=0;
- failed=0;
- bytes=0;
- while(1)//父进程读取管道数据,并做加法
- {
- 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); */
- if(--clients==0) break;
- }
- fclose(f);
- //输出测试结果
- 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);
- }
- return i;
- }
- /******************************
- 这里才是测试http的地方
- @host:地址
- @port:端口
- @req:http格式方法
- ********************************/
- void benchcore(const char *host,const int port,const char *req)
- {
- int rlen;
- char buf[1500];
- int s,i;
- struct sigaction sa;
- /* setup alarm signal handler */
- sa.sa_handler=alarm_handler;//定时器方法
- sa.sa_flags=0;
- if(sigaction(SIGALRM,&sa,NULL))
- exit(3);
- alarm(benchtime);
- rlen=strlen(req);
- nexttry:while(1)
- {
- if(timerexpired)//定时器到时后,会设定timerexpired=1,函数就会返回
- {
- if(failed>0)
- {
- /* fprintf(stderr,"Correcting failed by signal\n"); */
- failed--;
- }
- return;
- }
- s=Socket(host,port); //创建连接
- if(s<0) { failed++;continue;} //连接失败,failed加1
- if(rlen!=write(s,req,rlen)) {failed++;close(s);continue;}//发送失败
- if(http10==0)
- if(shutdown(s,1)) { failed++;close(s);continue;}
- if(force==0) //force等于0表示要读取http请求数据
- {
- /* read all available data from socket */
- while(1)
- {
- if(timerexpired) break;
- i=read(s,buf,1500);
- /* fprintf(stderr,"%d\n",i); */
- if(i<0)
- {
- failed++;
- close(s);
- goto nexttry;
- }
- else
- if(i==0) break;
- else
- bytes+=i;//读取字节数增加
- }
- }
- if(close(s)) {failed++;continue;}
- speed++;//http测试成功一次,speed加1
- }
- }
Web Bench是一个网站压力测试的工具。其最后更新时间是2004年,已经十年多了。其源代码总共才500多行,全部使用C语言编写,最多可以模拟上万个并发连接。
其原理也比较简单,就是使用fork创建子进程,通过子进程来测试http连接,把测试结果写到管道,再有父进程读取管道信息来计算测试结果。流程图下:
其源代码有2个文件组成
socket.c是创建socket连接的。主要的代码在webbench.c中。
webbench.c中有几个主要的函数。
static void usage(void)是在使用出错时提示怎么使用本程序。
void build_request(const char *url)是用来创建http连接请求的。
static int bench(void)中创建管道和子进程,调用测试http函数。
void benchcore(const char *host,const int port,const char *req)对http请求进行测试。
socket.c源代码及注释:
- /* $Id: socket.c 1.1 1995/01/01 07:11:14 cthuang Exp $
- *
- * This module has been modified by Radim Kolar for OS/2 emx
- */
- /***********************************************************************
- module: socket.c
- program: popclient
- SCCS ID: @(#)socket.c 1.5 4/1/94
- programmer: Virginia Tech Computing Center
- compiler: DEC RISC C compiler (Ultrix 4.1)
- environment: DEC Ultrix 4.3
- description: UNIX sockets code.
- ***********************************************************************/
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <fcntl.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- #include <netdb.h>
- #include <sys/time.h>
- #include <string.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <stdarg.h>
- /***********
- 功能:通过地址和端口建立网络连接
- @host:网络地址
- @clientPort:端口
- Return:建立的socket连接。
- 如果返回-1,表示建立连接失败
- ************/
- int Socket(const char *host, int clientPort)
- {
- int sock;
- unsigned long inaddr;
- struct sockaddr_in ad;
- struct hostent *hp;
- memset(&ad, 0, sizeof(ad));
- ad.sin_family = AF_INET;
- inaddr = inet_addr(host);//将点分的十进制的IP转为无符号长整形
- if (inaddr != INADDR_NONE)
- memcpy(&ad.sin_addr, &inaddr, sizeof(inaddr));
- else//如果host是域名
- {
- hp = gethostbyname(host);//用域名获取IP
- if (hp == NULL)
- return -1;
- memcpy(&ad.sin_addr, hp->h_addr, hp->h_length);
- }
- ad.sin_port = htons(clientPort);
- sock = socket(AF_INET, SOCK_STREAM, 0);
- if (sock < 0)
- return sock;
- //连接
- if (connect(sock, (struct sockaddr *)&ad, sizeof(ad)) < 0)
- return -1;
- return sock;
- }
wenbench.c源代码及注释
- /*
- * (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 <unistd.h>
- #include <sys/param.h>
- #include <rpc/types.h>
- #include <getopt.h>
- #include <strings.h>
- #include <time.h>
- #include <signal.h>
- /* values */
- volatile int timerexpired=0;
- int speed=0;
- int failed=0;
- int bytes=0;
- /* globals */
- //http协议的版本号
- int http10=1; /* 0 - http/0.9, 1 - http/1.0, 2 - http/1.1 */
- /* Allow: GET, HEAD, OPTIONS, TRACE */
- #define METHOD_GET 0
- #define METHOD_HEAD 1
- #define METHOD_OPTIONS 2
- #define METHOD_TRACE 3
- #define PROGRAM_VERSION "1.5"
- int method=METHOD_GET;//全局变量,指定http方法
- int clients=1;//并发数
- int force=0;//是否等待服务器应答。默认为不等待
- int force_reload=0;
- int proxyport=80;//代理服务器端口号。默认为80
- char *proxyhost=NULL;//代理服务器的地址
- int benchtime=30;//运行多久。默认为30s。可以通过-t指定
- /* internal */
- int mypipe[2];
- char host[MAXHOSTNAMELEN];
- #define REQUEST_SIZE 2048
- char request[REQUEST_SIZE];
- //struct option结构体,配合getopt_long函数使用
- 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);
- static void alarm_handler(int signal)
- {
- timerexpired=1;
- }
- /**************
- 程序使用方法
- ***************/
- 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 <sec> Run benchmark for <sec> seconds. Default 30.\n"
- " -p|--proxy <server:port> Use proxy server for request.\n"
- " -c|--clients <n> Run <n> 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)//使用方法不合适
- {
- usage();
- return 2;
- }
- //检查输入参数,并设置对应选项
- while((opt=getopt_long(argc,argv,"912Vfrt:p:c:?h",long_options,&options_index))!=EOF )
- {
- 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);//输入版本号
- case 't': benchtime=atoi(optarg);break; //optarg表示命令后的参数,例如-c 100,optarg为100。
- //atoi表示把字符串转换成长整型。
- case 'p':
- /* proxy server parsing server:port */
- tmp=strrchr(optarg,':');
- proxyhost=optarg;//设定地址
- if(tmp==NULL)
- {
- break;
- }
- if(tmp==optarg)
- {
- fprintf(stderr,"Error in option --proxy %s: Missing hostname.\n",optarg);
- return 2;
- }
- if(tmp==optarg+strlen(optarg)-1)
- {
- fprintf(stderr,"Error in option --proxy %s Port number is missing.\n",optarg);
- return 2;
- }
- *tmp='\0';
- proxyport=atoi(tmp+1);break;//重设端口号
- case ':':
- case 'h':
- case '?': usage();return 2;break;
- case 'c': clients=atoi(optarg);break;//并发数
- }
- }
- //optind为对应参数的下标位置
- 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"
- );
- //使用中,最后为URL,所以optind应该是URL的位置
- build_request(argv[optind]);
- /* print bench info */
- printf("\nBenchmarking: ");
- switch(method)
- {
- case METHOD_GET:
- default:
- printf("GET");break;
- case METHOD_OPTIONS:
- printf("OPTIONS");break;
- case METHOD_HEAD:
- printf("HEAD");break;
- case METHOD_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");
- else
- printf("%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");
- return bench();
- }
- /****************
- 创建URL请求连接
- @url:url地址
- 创建好的请求放在全局变量request中
- ****************/
- void build_request(const char *url)
- {
- char tmp[10];
- int i;
- //请求地址和请求连接清零
- bzero(host,MAXHOSTNAMELEN);
- bzero(request,REQUEST_SIZE);
- 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;
- 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,"://"))//找“://”在URL中的位置
- {
- fprintf(stderr, "\n%s: is not a valid URL.\n",url);
- exit(2);
- }
- if(strlen(url)>1500)//url是否太长
- {
- fprintf(stderr,"URL is too long.\n");
- exit(2);
- }
- if(proxyhost==NULL)//代理服务器是否为空
- if (0!=strncasecmp("http://",url,7)) //比较前7个字符串
- { fprintf(stderr,"\nOnly HTTP protocol is directly supported, set --proxy for others.\n");
- exit(2);
- }
- /* protocol/host delimiter */
- i=strstr(url,"://")-url+3;//i指向http://后第一个位置
- /* printf("%d\n",i); */
- if(strchr(url+i,'/')==NULL) {
- fprintf(stderr,"\nInvalid URL syntax - hostname don't ends with '/'.\n");
- exit(2);
- }
- if(proxyhost==NULL)
- {
- /* get port from hostname */
- if(index(url+i,':')!=NULL &&
- index(url+i,':')<index(url+i,'/'))//判断url中是否指定了端口号
- {
- strncpy(host,url+i,strchr(url+i,':')-url-i);//取出主机地址
- bzero(tmp,10);
- strncpy(tmp,index(url+i,':')+1,strchr(url+i,'/')-index(url+i,':')-1);
- /* printf("tmp=%s\n",tmp); */
- proxyport=atoi(tmp);//端口号转换为int
- if(proxyport==0) proxyport=80;
- } else
- {
- strncpy(host,url+i,strcspn(url+i,"/"));
- }
- // printf("Host=%s\n",host);
- strcat(request+strlen(request),url+i+strcspn(url+i,"/"));
- } else
- {
- // printf("ProxyHost=%s\nProxyPort=%d\n",proxyhost,proxyport);
- strcat(request,url);
- }
- if(http10==1)//版本号
- 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");
- }
- if(http10>1)
- strcat(request,"Connection: close\r\n");
- /* add empty line at end */
- if(http10>0) strcat(request,"\r\n");
- // printf("Req=%s\n",request);
- }
- /* vraci system rc error kod */
- /**********************
- 创建管道和子进程,对http请求进行测试
- **********************/
- static int bench(void)
- {
- int i,j,k;
- pid_t pid=0;
- FILE *f;
- /* check avaibility of target server */
- i=Socket(proxyhost==NULL?host:proxyhost,proxyport);
- if(i<0) {
- fprintf(stderr,"\nConnect to server failed. Aborting benchmark.\n");
- return 1;
- }
- 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 */
- for(i=0;i<clients;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)//是否使用proxyhost
- benchcore(host,proxyport,request);
- else
- benchcore(proxyhost,proxyport,request);
- /* write results to pipe */
- 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);//把每个子进程运行的结果放到管道。
- fclose(f);
- return 0;
- } else
- {
- f=fdopen(mypipe[0],"r");
- if(f==NULL)
- {
- perror("open pipe for reading failed.");
- return 3;
- }
- setvbuf(f,NULL,_IONBF,0);
- speed=0;
- failed=0;
- bytes=0;
- while(1)//父进程读取管道数据,并做加法
- {
- 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); */
- if(--clients==0) break;
- }
- fclose(f);
- //输出测试结果
- 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);
- }
- return i;
- }
- /******************************
- 这里才是测试http的地方
- @host:地址
- @port:端口
- @req:http格式方法
- ********************************/
- void benchcore(const char *host,const int port,const char *req)
- {
- int rlen;
- char buf[1500];
- int s,i;
- struct sigaction sa;
- /* setup alarm signal handler */
- sa.sa_handler=alarm_handler;//定时器方法
- sa.sa_flags=0;
- if(sigaction(SIGALRM,&sa,NULL))
- exit(3);
- alarm(benchtime);
- rlen=strlen(req);
- nexttry:while(1)
- {
- if(timerexpired)//定时器到时后,会设定timerexpired=1,函数就会返回
- {
- if(failed>0)
- {
- /* fprintf(stderr,"Correcting failed by signal\n"); */
- failed--;
- }
- return;
- }
- s=Socket(host,port); //创建连接
- if(s<0) { failed++;continue;} //连接失败,failed加1
- if(rlen!=write(s,req,rlen)) {failed++;close(s);continue;}//发送失败
- if(http10==0)
- if(shutdown(s,1)) { failed++;close(s);continue;}
- if(force==0) //force等于0表示要读取http请求数据
- {
- /* read all available data from socket */
- while(1)
- {
- if(timerexpired) break;
- i=read(s,buf,1500);
- /* fprintf(stderr,"%d\n",i); */
- if(i<0)
- {
- failed++;
- close(s);
- goto nexttry;
- }
- else
- if(i==0) break;
- else
- bytes+=i;//读取字节数增加
- }
- }
- if(close(s)) {failed++;continue;}
- speed++;//http测试成功一次,speed加1
- }
- }
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