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/* tinyproxy - A fast light-weight HTTP proxy
* Copyright (C) 2000 Robert James Kaes <rjkaes@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* This module handles the statistics for tinyproxy. There are only two
* public API functions. The reason for the functions, rather than just a
* external structure is that tinyproxy is now multi-threaded and we can
* not allow more than one child to access the statistics at the same
* time. This is prevented by a mutex. If there is a need for more
* statistics in the future, just add to the structure, enum (in the header),
* and the switch statement in update_stats().
*/
#include "main.h"
#include "log.h"
#include "heap.h"
#include "html-error.h"
#include "stats.h"
#include "utils.h"
#include "conf.h"
#include <pthread.h>
struct stat_s {
unsigned long int num_reqs;
unsigned long int num_badcons;
unsigned long int num_open;
unsigned long int num_refused;
unsigned long int num_denied;
};
static struct stat_s stats_buf, *stats;
static pthread_mutex_t stats_update_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t stats_file_lock = PTHREAD_MUTEX_INITIALIZER;
/*
* Initialize the statistics information to zero.
*/
void init_stats (void)
{
stats = &stats_buf;
}
/*
* Display the statics of the tinyproxy server.
*/
int
showstats (struct conn_s *connptr)
{
char *message_buffer;
char opens[16], reqs[16], badconns[16], denied[16], refused[16];
FILE *statfile;
snprintf (opens, sizeof (opens), "%lu", stats->num_open);
snprintf (reqs, sizeof (reqs), "%lu", stats->num_reqs);
snprintf (badconns, sizeof (badconns), "%lu", stats->num_badcons);
snprintf (denied, sizeof (denied), "%lu", stats->num_denied);
snprintf (refused, sizeof (refused), "%lu", stats->num_refused);
pthread_mutex_lock(&stats_file_lock);
if (!config->statpage || (!(statfile = fopen (config->statpage, "r")))) {
message_buffer = (char *) safemalloc (MAXBUFFSIZE);
if (!message_buffer) {
err_minus_one:
pthread_mutex_unlock(&stats_file_lock);
return -1;
}
snprintf
(message_buffer, MAXBUFFSIZE,
"<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n"
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" "
"\"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">\n"
"<html>\n"
"<head><title>%s version %s run-time statistics</title></head>\n"
"<body>\n"
"<h1>%s version %s run-time statistics</h1>\n"
"<p>\n"
"Number of open connections: %lu<br />\n"
"Number of requests: %lu<br />\n"
"Number of bad connections: %lu<br />\n"
"Number of denied connections: %lu<br />\n"
"Number of refused connections due to high load: %lu\n"
"</p>\n"
"<hr />\n"
"<p><em>Generated by %s version %s.</em></p>\n" "</body>\n"
"</html>\n",
PACKAGE, VERSION, PACKAGE, VERSION,
stats->num_open,
stats->num_reqs,
stats->num_badcons, stats->num_denied,
stats->num_refused, PACKAGE, VERSION);
if (send_http_message (connptr, 200, "OK",
message_buffer) < 0) {
safefree (message_buffer);
goto err_minus_one;
}
safefree (message_buffer);
pthread_mutex_unlock(&stats_file_lock);
return 0;
}
add_error_variable (connptr, "opens", opens);
add_error_variable (connptr, "reqs", reqs);
add_error_variable (connptr, "badconns", badconns);
add_error_variable (connptr, "deniedconns", denied);
add_error_variable (connptr, "refusedconns", refused);
add_standard_vars (connptr);
send_http_headers (connptr, 200, "Statistic requested", "");
send_html_file (statfile, connptr);
fclose (statfile);
pthread_mutex_unlock(&stats_file_lock);
return 0;
}
/*
* Update the value of the statistics. The update_level is defined in
* stats.h
*/
int update_stats (status_t update_level)
{
int ret = 0;
pthread_mutex_lock(&stats_update_lock);
switch (update_level) {
case STAT_BADCONN:
++stats->num_badcons;
break;
case STAT_OPEN:
++stats->num_open;
++stats->num_reqs;
break;
case STAT_CLOSE:
--stats->num_open;
break;
case STAT_REFUSE:
++stats->num_refused;
break;
case STAT_DENIED:
++stats->num_denied;
break;
default:
ret = -1;
}
pthread_mutex_unlock(&stats_update_lock);
return ret;
}
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