2 * collectd - src/nginx.c
3 * Copyright (C) 2006-2010 Florian octo Forster
4 * Copyright (C) 2008 Sebastian Harl
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Florian octo Forster <octo at collectd.org>
26 * Sebastian Harl <sh at tokkee.org>
32 #include "configfile.h"
34 #include <curl/curl.h>
36 static char *url = NULL;
37 static char *user = NULL;
38 static char *pass = NULL;
39 static char *verify_peer = NULL;
40 static char *verify_host = NULL;
41 static char *cacert = NULL;
43 static CURL *curl = NULL;
45 static char nginx_buffer[16384];
46 static size_t nginx_buffer_len = 0;
47 static char nginx_curl_error[CURL_ERROR_SIZE];
49 static const char *config_keys[] =
58 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
60 static size_t nginx_curl_callback (void *buf, size_t size, size_t nmemb,
61 void __attribute__((unused)) *stream)
63 size_t len = size * nmemb;
65 /* Check if the data fits into the memory. If not, truncate it. */
66 if ((nginx_buffer_len + len) >= sizeof (nginx_buffer))
68 assert (sizeof (nginx_buffer) > nginx_buffer_len);
69 len = (sizeof (nginx_buffer) - 1) - nginx_buffer_len;
75 memcpy (&nginx_buffer[nginx_buffer_len], buf, len);
76 nginx_buffer_len += len;
77 nginx_buffer[nginx_buffer_len] = 0;
82 static int config_set (char **var, const char *value)
90 if ((*var = strdup (value)) == NULL)
96 static int config (const char *key, const char *value)
98 if (strcasecmp (key, "url") == 0)
99 return (config_set (&url, value));
100 else if (strcasecmp (key, "user") == 0)
101 return (config_set (&user, value));
102 else if (strcasecmp (key, "password") == 0)
103 return (config_set (&pass, value));
104 else if (strcasecmp (key, "verifypeer") == 0)
105 return (config_set (&verify_peer, value));
106 else if (strcasecmp (key, "verifyhost") == 0)
107 return (config_set (&verify_host, value));
108 else if (strcasecmp (key, "cacert") == 0)
109 return (config_set (&cacert, value));
114 static int init (void)
116 static char credentials[1024];
119 curl_easy_cleanup (curl);
121 if ((curl = curl_easy_init ()) == NULL)
123 ERROR ("nginx plugin: curl_easy_init failed.");
127 curl_easy_setopt (curl, CURLOPT_NOSIGNAL, 1L);
128 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, nginx_curl_callback);
129 curl_easy_setopt (curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
130 curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, nginx_curl_error);
134 int status = ssnprintf (credentials, sizeof (credentials),
135 "%s:%s", user, pass == NULL ? "" : pass);
136 if ((status < 0) || ((size_t) status >= sizeof (credentials)))
138 ERROR ("nginx plugin: Credentials would have been truncated.");
142 curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
147 curl_easy_setopt (curl, CURLOPT_URL, url);
150 curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1L);
151 curl_easy_setopt (curl, CURLOPT_MAXREDIRS, 50L);
153 if ((verify_peer == NULL) || IS_TRUE (verify_peer))
155 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 1L);
159 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0L);
162 if ((verify_host == NULL) || IS_TRUE (verify_host))
164 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 2L);
168 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0L);
173 curl_easy_setopt (curl, CURLOPT_CAINFO, cacert);
179 static void submit (char *type, char *inst, long long value)
182 value_list_t vl = VALUE_LIST_INIT;
184 if (strcmp (type, "nginx_connections") == 0)
185 values[0].gauge = value;
186 else if (strcmp (type, "nginx_requests") == 0)
187 values[0].derive = value;
188 else if (strcmp (type, "connections") == 0)
189 values[0].derive = value;
195 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
196 sstrncpy (vl.plugin, "nginx", sizeof (vl.plugin));
197 sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
198 sstrncpy (vl.type, type, sizeof (vl.type));
201 sstrncpy (vl.type_instance, inst, sizeof (vl.type_instance));
203 plugin_dispatch_values (&vl);
206 static int nginx_read (void)
223 nginx_buffer_len = 0;
224 if (curl_easy_perform (curl) != CURLE_OK)
226 WARNING ("nginx plugin: curl_easy_perform failed: %s", nginx_curl_error);
232 while ((lines[lines_num] = strtok_r (ptr, "\n\r", &saveptr)) != NULL)
242 * Active connections: 291
243 * server accepts handled requests
244 * 16630948 16630948 31070465
245 * Reading: 6 Writing: 179 Waiting: 106
247 for (i = 0; i < lines_num; i++)
249 fields_num = strsplit (lines[i], fields,
250 (sizeof (fields) / sizeof (fields[0])));
254 if ((strcmp (fields[0], "Active") == 0)
255 && (strcmp (fields[1], "connections:") == 0))
257 submit ("nginx_connections", "active", atoll (fields[2]));
259 else if ((atoll (fields[0]) != 0)
260 && (atoll (fields[1]) != 0)
261 && (atoll (fields[2]) != 0))
263 submit ("connections", "accepted", atoll (fields[0]));
264 submit ("connections", "handled", atoll (fields[1]));
265 submit ("nginx_requests", NULL, atoll (fields[2]));
268 else if (fields_num == 6)
270 if ((strcmp (fields[0], "Reading:") == 0)
271 && (strcmp (fields[2], "Writing:") == 0)
272 && (strcmp (fields[4], "Waiting:") == 0))
274 submit ("nginx_connections", "reading", atoll (fields[1]));
275 submit ("nginx_connections", "writing", atoll (fields[3]));
276 submit ("nginx_connections", "waiting", atoll (fields[5]));
281 nginx_buffer_len = 0;
284 } /* int nginx_read */
286 void module_register (void)
288 plugin_register_config ("nginx", config, config_keys, config_keys_num);
289 plugin_register_init ("nginx", init);
290 plugin_register_read ("nginx", nginx_read);
291 } /* void module_register */
294 * vim: set shiftwidth=2 softtabstop=2 tabstop=8 :