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