/*
 *  Author : WangBoJing , email : 1989wangbojing@gmail.com
 * 
 *  Copyright Statement:
 *  --------------------
 *  This software is protected by Copyright and the information contained
 *  herein is confidential. The software may not be copied and the information
 *  contained herein may not be used or disclosed except with the written
 *  permission of Author. (C) 2017
 * 
 *

****       *****                                      *****
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  ***        *         *                            *       **
  * **       *         *                           **        **
  * **       *         *                          **          *
  *  **      *        **                          **          *
  *  **      *       ***                          **
  *   **     *    ***********    *****    *****  **                   ****
  *   **     *        **           **      **    **                 **    **
  *    **    *        **           **      *     **                 *      **
  *    **    *        **            *      *     **                **      **
  *     **   *        **            **     *     **                *        **
  *     **   *        **             *    *      **               **        **
  *      **  *        **             **   *      **               **        **
  *      **  *        **             **   *      **               **        **
  *       ** *        **              *  *       **               **        **
  *       ** *        **              ** *        **          *   **        **
  *        ***        **               * *        **          *   **        **
  *        ***        **     *         **          *         *     **      **
  *         **        **     *         **          **       *      **      **
  *         **         **   *          *            **     *        **    **
*****        *          ****           *              *****           ****
                                       *
                                      *
                                  *****
                                  ****



 *
 */

/*
 * (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 <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>

#include "nty_coroutine.h"

#define ENABLE_NTYCO		1
#define MAX_BUFFER_LENGTH	1024


#define write(a, b, c)		nty_send(a, b, c, 0)
#define send(a, b, c, d)	nty_send(a, b, c, d)
#define read(a, b, c)		nty_recv(a, b, c, 0)
#define recv(a, b, c, d)	nty_recv(a, b, c, d)
#define connect(a, b, c)	nty_connect(a, b, c)
#define socket(a, b, c)		nty_socket(a, b, c)
#define close(a)			nty_close(a)
#define accept(a, b, c)		nty_accept(a, b, c)



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);
    if (inaddr != INADDR_NONE)
        memcpy(&ad.sin_addr, &inaddr, sizeof(inaddr));
    else
    {
        hp = gethostbyname(host);
        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;
    if (connect(sock, (struct sockaddr *)&ad, sizeof(ad)) < 0)
        return -1;
    return sock;
}


#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 */
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;
int clients=1;


#if ENABLE_NTYCO
// clients --> fork num
// nreqs --> http request
// socket --> io num
// socket per fork --> sockets / client
// request per socket --> request / sockets

int nreqs = 0;
int sockets = 0;
#endif
int force=0;
int force_reload=0;
int proxyport=80;
char *proxyhost=NULL;
int benchtime=30;
/* internal */
int mypipe[2];
char host[MAXHOSTNAMELEN];
#define REQUEST_SIZE 2048
char request[REQUEST_SIZE] = {0};

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;
}	

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"
	"  -n|--request <num>       Sum of requestion\n"
	"  -s|--socket <num>        Sum of socket\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)
 {
	  usage();
          return 2;
 } 

 while((opt=getopt_long(argc,argv,"912Vfrt:p:n:s: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);
   case 't': benchtime=atoi(optarg);break;	     
   case 'p': 
	     /* proxy server parsing server:port */
	     tmp=strrchr(optarg,':');
	     proxyhost=optarg;
	     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;
   case ':':
   case 'h':
   case '?': usage();return 2;break;
   case 'c': clients=atoi(optarg);break;
#if ENABLE_NTYCO
   case 'n': nreqs=atoi(optarg);break;
   case 's': sockets=atoi(optarg);break;
#endif
  }
 }
 
 if(optind==argc) {
                      fprintf(stderr,"webbench: Missing URL!\n");
		      usage();
		      return 2;
                    }

 if(clients==0) clients=1;
 if(benchtime==0) benchtime=60;
 
#if ENABLE_NTYCO
	if (clients > 10) clients = 10;
	if (nreqs < 1000) nreqs = 1000;
	//if (sockets < clients) sockets = clients;
	if (sockets % clients != 0)  sockets = sockets / clients * clients;
#endif

 /* 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]);
 /* 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();
}

void build_request(const char *url)
{
  char tmp[10];
  int i;

  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,"://"))
  {
	  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 */
  i=strstr(url,"://")-url+3;
  /* 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,'/'))
   {
	   strncpy(host,url+i,strchr(url+i,':')-url-i);
	   bzero(tmp,10);
	   strncpy(tmp,index(url+i,':')+1,strchr(url+i,'/')-index(url+i,':')-1);
	   /* printf("tmp=%s\n",tmp); */
	   proxyport=atoi(tmp);
	   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)
	  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 */
static int bench(void)
{
  int i,j,k;	
  pid_t pid=0;
  FILE *f;
#if ENABLE_NTYCO == 0
  /* 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);
#endif
  /* 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();
  */
  printf("bench enter\n");

  /* 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)
      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);
	 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)
	  {
		  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);

  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;
}

struct serv_host {
	const char *host;
	const int port;
	const char *req;
};

int testok(char *response) {
	if (response == NULL) return -1;
	
	char* p;
	char* q;
	
	p = strchr(response, '\n');
	*p = '\0';
	if(NULL != (q = strstr(response, "200 OK")))
		return 1;
	else
		return 0;
}

int send_buffer(int sockfd, char *buffer, int length) {

	int idx = 0;
	while (idx < length) {
		
		int count = 0;
		if ((idx+MAX_BUFFER_LENGTH) < length) {
			count = send(sockfd, buffer+idx, MAX_BUFFER_LENGTH, 0);
		} else {
			count = send(sockfd, buffer+idx, length-idx, 0);
		}
		if (count < 0) break;

		idx += count;
	}

	return idx;

}

int recv_buffer(int sockfd, char *buffer, int length, int *ret) {

	int idx = 0;

	while (1) {
		
		int count = recv(sockfd, buffer+idx, MAX_BUFFER_LENGTH, 0);
		//printf("sockfd : %d, recv_buffer --> %d\n", sockfd, count);
		if (count < 0) {
			*ret = -1;
			break;
		} else if (count == 0) {
			*ret = 0;
			close(sockfd);
			break;
		} else {
			//printf("sockfd : %d, recv_buffer --> %d\n", sockfd, count);
			idx += count;
		}
	}
	if (idx > 0) *ret = 1;
	
	return idx;
}


void httprequest_commit(void *arg) {
	char buf[1500] = {0};
	struct serv_host *shost = (struct serv_host *)arg;

	int slen = strlen(shost->req);
	
	int idx = 0;
	for (idx = 0;idx < (nreqs / sockets);idx ++) {
		
		int s = Socket(shost->host, shost->port);
		if (s < 0) {
			failed ++;
			continue ;
		}
		
		if (slen != send(s, shost->req, slen, 0)) {
			failed ++;
			close(s);
			continue;
		}

		memset(buf, 0, 1500);
#if ENABLE_NTYCO
		int ret = 0;
		int rlen = recv_buffer(s, buf, 1500, &ret);
#else
		int rlen = recv(s, buf, 1500, 0);
#endif
		if (ret < 0) {
			failed ++;
		} else {
			
			if (testok(buf)) {
				speed ++;
				
			} else {
				failed ++;
				
			}
			bytes += rlen;
		}
	}

	return ;
}


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;
 sa.sa_flags=0;
 if(sigaction(SIGALRM,&sa,NULL))
    exit(3);
 alarm(benchtime);
 
#if ENABLE_NTYCO

	//int i = 0;
	nty_coroutine *co = NULL;
	struct serv_host shost = {host, port, req};

	for (i = 0;i < sockets / clients;i ++) {
		
		nty_coroutine_create(&co, httprequest_commit, &shost);
	}
	nty_schedule_run();

#else

 rlen=strlen(req);
 nexttry:while(1)
 {
    if(timerexpired)
    {
       if(failed>0)
       {
          /* fprintf(stderr,"Correcting failed by signal\n"); */
          failed--;
       }
       return;
    }
    s=Socket(host,port);                          
    if(s<0) { failed++;continue;} 
    if(rlen!=write(s, req, rlen)) {failed++;close(s);continue;}
	
#if ENABLE_NTYCO
	if(http10==0) 
		close(s);
#else
    if(http10==0) 
	    if(shutdown(s,1)) { failed++;close(s);continue;}
	
#endif
    if(force==0) 
    {
            /* 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;
	    }
    }
    if(close(s)) {failed++;continue;}
    speed++;
 }
#endif
}