/* $NetBSD: bench_httpclient.c,v 1.1.1.3 2021/04/07 02:43:15 christos Exp $ */

/* $NetBSD: bench_httpclient.c,v 1.1.1.3 2021/04/07 02:43:15 christos Exp $ */
/*
* Copyright 2009-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/

/* for EVUTIL_ERR_CONNECT_RETRIABLE macro */
#include "util-internal.h"

#include <sys/types.h>
#ifdef _WIN32
#include <winsock2.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
# ifdef _XOPEN_SOURCE_EXTENDED
# include <arpa/inet.h>
# endif
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#include "event2/event.h"
#include "event2/bufferevent.h"
#include "event2/buffer.h"
#include "event2/util.h"

const char *resource = NULL;
struct event_base *base = NULL;

int total_n_handled = 0;
int total_n_errors = 0;
int total_n_launched = 0;
size_t total_n_bytes = 0;
struct timeval total_time = {0,0};
int n_errors = 0;

const int PARALLELISM = 200;
const int N_REQUESTS = 20000;

struct request_info {
size_t n_read;
struct timeval started;
};

static int launch_request(void);
static void readcb(struct bufferevent *b, void *arg);
static void errorcb(struct bufferevent *b, short what, void *arg);

static void
readcb(struct bufferevent *b, void *arg)
{
struct request_info *ri = arg;
struct evbuffer *input = bufferevent_get_input(b);
size_t n = evbuffer_get_length(input);

ri->n_read += n;
evbuffer_drain(input, n);
}

static void
errorcb(struct bufferevent *b, short what, void *arg)
{
struct request_info *ri = arg;
struct timeval now, diff;
if (what & BEV_EVENT_EOF) {
++total_n_handled;
total_n_bytes += ri->n_read;
evutil_gettimeofday(&now, NULL);
evutil_timersub(&now, &ri->started, &diff);
evutil_timeradd(&diff, &total_time, &total_time);

if (total_n_handled && (total_n_handled%1000)==0)
printf("%d requests done\n",total_n_handled);

if (total_n_launched < N_REQUESTS) {
if (launch_request() < 0)
perror("Can't launch");
}
} else {
++total_n_errors;
perror("Unexpected error");
}

bufferevent_setcb(b, NULL, NULL, NULL, NULL);
free(ri);
bufferevent_disable(b, EV_READ|EV_WRITE);
bufferevent_free(b);
}

static void
frob_socket(evutil_socket_t sock)
{
#ifdef EVENT__HAVE_STRUCT_LINGER
struct linger l;
#endif
int one = 1;
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&one, sizeof(one))<0)
perror("setsockopt(SO_REUSEADDR)");
#ifdef EVENT__HAVE_STRUCT_LINGER
l.l_onoff = 1;
l.l_linger = 0;
if (setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&l, sizeof(l))<0)
perror("setsockopt(SO_LINGER)");
#endif
}

static int
launch_request(void)
{
evutil_socket_t sock;
struct sockaddr_in sin;
struct bufferevent *b;

struct request_info *ri;

memset(&sin, 0, sizeof(sin));

++total_n_launched;

sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(0x7f000001);
sin.sin_port = htons(8080);
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
return -1;
if (evutil_make_socket_nonblocking(sock) < 0) {
evutil_closesocket(sock);
return -1;
}
frob_socket(sock);
if (connect(sock, (struct sockaddr*)&sin, sizeof(sin)) < 0) {
int e = evutil_socket_geterror(sock);
if (! EVUTIL_ERR_CONNECT_RETRIABLE(e)) {
evutil_closesocket(sock);
return -1;
}
}

ri = malloc(sizeof(*ri));
ri->n_read = 0;
evutil_gettimeofday(&ri->started, NULL);

b = bufferevent_socket_new(base, sock, BEV_OPT_CLOSE_ON_FREE);

bufferevent_setcb(b, readcb, NULL, errorcb, ri);
bufferevent_enable(b, EV_READ|EV_WRITE);

evbuffer_add_printf(bufferevent_get_output(b),
"GET %s HTTP/1.0\r\n\r\n", resource);

return 0;
}

int
main(int argc, char **argv)
{
int i;
struct timeval start, end, total;
long long usec;
double throughput;

#ifdef _WIN32
WSADATA WSAData;
WSAStartup(0x101, &WSAData);
#endif

resource = "/ref";

setvbuf(stdout, NULL, _IONBF, 0);

base = event_base_new();

for (i=0; i < PARALLELISM; ++i) {
if (launch_request() < 0)
perror("launch");
}

evutil_gettimeofday(&start, NULL);

event_base_dispatch(base);

evutil_gettimeofday(&end, NULL);
evutil_timersub(&end, &start, &total);
usec = total_time.tv_sec * (long long)1000000 + total_time.tv_usec;

if (!total_n_handled) {
puts("Nothing worked. You probably did something dumb.");
return 0;
}

throughput = total_n_handled /
(total.tv_sec+ ((double)total.tv_usec)/1000000.0);

#ifdef _WIN32
#define I64_FMT "%I64d"
#define I64_TYP __int64
#else
#define I64_FMT "%lld"
#define I64_TYP long long int
#endif

printf("\n%d requests in %d.%06d sec. (%.2f throughput)\n"
"Each took about %.02f msec latency\n"
I64_FMT "bytes read. %d errors.\n",
total_n_handled,
(int)total.tv_sec, (int)total.tv_usec,
throughput,
(double)(usec/1000) / total_n_handled,
(I64_TYP)total_n_bytes, n_errors);

#ifdef _WIN32
WSACleanup();
#endif

return 0;
}