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/**
* collectd - src/nginx.c
* Copyright (C) 2006-2010 Florian octo Forster
* Copyright (C) 2008 Sebastian Harl
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
* Florian octo Forster <octo at collectd.org>
* Sebastian Harl <sh at tokkee.org>
**/
#include "collectd.h"
#include "common.h"
#include "plugin.h"
#include "configfile.h"
#include <curl/curl.h>
static char *url = NULL;
static char *user = NULL;
static char *pass = NULL;
static char *verify_peer = NULL;
static char *verify_host = NULL;
static char *cacert = NULL;
static CURL *curl = NULL;
static char nginx_buffer[16384];
static size_t nginx_buffer_len = 0;
static char nginx_curl_error[CURL_ERROR_SIZE];
static const char *config_keys[] =
{
"URL",
"User",
"Password",
"VerifyPeer",
"VerifyHost",
"CACert"
};
static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
static size_t nginx_curl_callback (void *buf, size_t size, size_t nmemb,
void __attribute__((unused)) *stream)
{
size_t len = size * nmemb;
/* Check if the data fits into the memory. If not, truncate it. */
if ((nginx_buffer_len + len) >= sizeof (nginx_buffer))
{
assert (sizeof (nginx_buffer) > nginx_buffer_len);
len = (sizeof (nginx_buffer) - 1) - nginx_buffer_len;
}
if (len <= 0)
return (len);
memcpy (&nginx_buffer[nginx_buffer_len], buf, len);
nginx_buffer_len += len;
nginx_buffer[nginx_buffer_len] = 0;
return (len);
}
static int config_set (char **var, const char *value)
{
if (*var != NULL)
{
free (*var);
*var = NULL;
}
if ((*var = strdup (value)) == NULL)
return (1);
else
return (0);
}
static int config (const char *key, const char *value)
{
if (strcasecmp (key, "url") == 0)
return (config_set (&url, value));
else if (strcasecmp (key, "user") == 0)
return (config_set (&user, value));
else if (strcasecmp (key, "password") == 0)
return (config_set (&pass, value));
else if (strcasecmp (key, "verifypeer") == 0)
return (config_set (&verify_peer, value));
else if (strcasecmp (key, "verifyhost") == 0)
return (config_set (&verify_host, value));
else if (strcasecmp (key, "cacert") == 0)
return (config_set (&cacert, value));
else
return (-1);
} /* int config */
static int init (void)
{
static char credentials[1024];
if (curl != NULL)
curl_easy_cleanup (curl);
if ((curl = curl_easy_init ()) == NULL)
{
ERROR ("nginx plugin: curl_easy_init failed.");
return (-1);
}
curl_easy_setopt (curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, nginx_curl_callback);
curl_easy_setopt (curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, nginx_curl_error);
if (user != NULL)
{
int status = ssnprintf (credentials, sizeof (credentials),
"%s:%s", user, pass == NULL ? "" : pass);
if ((status < 0) || ((size_t) status >= sizeof (credentials)))
{
ERROR ("nginx plugin: Credentials would have been truncated.");
return (-1);
}
curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
}
if (url != NULL)
{
curl_easy_setopt (curl, CURLOPT_URL, url);
}
curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1);
if ((verify_peer == NULL) || IS_TRUE (verify_peer))
{
curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 1);
}
else
{
curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0);
}
if ((verify_host == NULL) || IS_TRUE (verify_host))
{
curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 2);
}
else
{
curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0);
}
if (cacert != NULL)
{
curl_easy_setopt (curl, CURLOPT_CAINFO, cacert);
}
return (0);
} /* void init */
static void submit (char *type, char *inst, long long value)
{
value_t values[1];
value_list_t vl = VALUE_LIST_INIT;
if (strcmp (type, "nginx_connections") == 0)
values[0].gauge = value;
else if (strcmp (type, "nginx_requests") == 0)
values[0].derive = value;
else
return;
vl.values = values;
vl.values_len = 1;
sstrncpy (vl.host, hostname_g, sizeof (vl.host));
sstrncpy (vl.plugin, "nginx", sizeof (vl.plugin));
sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
sstrncpy (vl.type, type, sizeof (vl.type));
if (inst != NULL)
sstrncpy (vl.type_instance, inst, sizeof (vl.type_instance));
plugin_dispatch_values (&vl);
} /* void submit */
static int nginx_read (void)
{
int i;
char *ptr;
char *lines[16];
int lines_num = 0;
char *saveptr;
char *fields[16];
int fields_num;
if (curl == NULL)
return (-1);
if (url == NULL)
return (-1);
nginx_buffer_len = 0;
if (curl_easy_perform (curl) != 0)
{
WARNING ("nginx plugin: curl_easy_perform failed: %s", nginx_curl_error);
return (-1);
}
ptr = nginx_buffer;
saveptr = NULL;
while ((lines[lines_num] = strtok_r (ptr, "\n\r", &saveptr)) != NULL)
{
ptr = NULL;
lines_num++;
if (lines_num >= 16)
break;
}
/*
* Active connections: 291
* server accepts handled requests
* 16630948 16630948 31070465
* Reading: 6 Writing: 179 Waiting: 106
*/
for (i = 0; i < lines_num; i++)
{
fields_num = strsplit (lines[i], fields,
(sizeof (fields) / sizeof (fields[0])));
if (fields_num == 3)
{
if ((strcmp (fields[0], "Active") == 0)
&& (strcmp (fields[1], "connections:") == 0))
{
submit ("nginx_connections", "active", atoll (fields[2]));
}
else if ((atoll (fields[0]) != 0)
&& (atoll (fields[1]) != 0)
&& (atoll (fields[2]) != 0))
{
submit ("nginx_requests", NULL, atoll (fields[2]));
}
}
else if (fields_num == 6)
{
if ((strcmp (fields[0], "Reading:") == 0)
&& (strcmp (fields[2], "Writing:") == 0)
&& (strcmp (fields[4], "Waiting:") == 0))
{
submit ("nginx_connections", "reading", atoll (fields[1]));
submit ("nginx_connections", "writing", atoll (fields[3]));
submit ("nginx_connections", "waiting", atoll (fields[5]));
}
}
}
nginx_buffer_len = 0;
return (0);
} /* int nginx_read */
void module_register (void)
{
plugin_register_config ("nginx", config, config_keys, config_keys_num);
plugin_register_init ("nginx", init);
plugin_register_read ("nginx", nginx_read);
} /* void module_register */
/*
* vim: set shiftwidth=2 softtabstop=2 tabstop=8 :
*/
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