1 /**
2 * collectd - src/nginx.c
3 * Copyright (C) 2006-2010 Florian octo Forster
4 * Copyright (C) 2008 Sebastian Harl
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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.
23 *
24 * Authors:
25 * Florian octo Forster <octo at collectd.org>
26 * Sebastian Harl <sh at tokkee.org>
27 **/
29 #include "collectd.h"
31 #include "common.h"
32 #include "plugin.h"
33 #include "configfile.h"
35 #include <curl/curl.h>
37 static char *url = NULL;
38 static char *user = NULL;
39 static char *pass = NULL;
40 static char *verify_peer = NULL;
41 static char *verify_host = NULL;
42 static char *cacert = NULL;
43 static char *timeout = NULL;
45 static CURL *curl = NULL;
47 static char nginx_buffer[16384];
48 static size_t nginx_buffer_len = 0;
49 static char nginx_curl_error[CURL_ERROR_SIZE];
51 static const char *config_keys[] =
52 {
53 "URL",
54 "User",
55 "Password",
56 "VerifyPeer",
57 "VerifyHost",
58 "CACert",
59 "Timeout"
60 };
61 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
63 static size_t nginx_curl_callback (void *buf, size_t size, size_t nmemb,
64 void __attribute__((unused)) *stream)
65 {
66 size_t len = size * nmemb;
68 /* Check if the data fits into the memory. If not, truncate it. */
69 if ((nginx_buffer_len + len) >= sizeof (nginx_buffer))
70 {
71 assert (sizeof (nginx_buffer) > nginx_buffer_len);
72 len = (sizeof (nginx_buffer) - 1) - nginx_buffer_len;
73 }
75 if (len == 0)
76 return (len);
78 memcpy (&nginx_buffer[nginx_buffer_len], buf, len);
79 nginx_buffer_len += len;
80 nginx_buffer[nginx_buffer_len] = 0;
82 return (len);
83 }
85 static int config_set (char **var, const char *value)
86 {
87 if (*var != NULL)
88 {
89 free (*var);
90 *var = NULL;
91 }
93 if ((*var = strdup (value)) == NULL)
94 return (1);
95 else
96 return (0);
97 }
99 static int config (const char *key, const char *value)
100 {
101 if (strcasecmp (key, "url") == 0)
102 return (config_set (&url, value));
103 else if (strcasecmp (key, "user") == 0)
104 return (config_set (&user, value));
105 else if (strcasecmp (key, "password") == 0)
106 return (config_set (&pass, value));
107 else if (strcasecmp (key, "verifypeer") == 0)
108 return (config_set (&verify_peer, value));
109 else if (strcasecmp (key, "verifyhost") == 0)
110 return (config_set (&verify_host, value));
111 else if (strcasecmp (key, "cacert") == 0)
112 return (config_set (&cacert, value));
113 else if (strcasecmp (key, "timeout") == 0)
114 return (config_set (&timeout, value));
115 else
116 return (-1);
117 } /* int config */
119 static int init (void)
120 {
121 if (curl != NULL)
122 curl_easy_cleanup (curl);
124 if ((curl = curl_easy_init ()) == NULL)
125 {
126 ERROR ("nginx plugin: curl_easy_init failed.");
127 return (-1);
128 }
130 curl_easy_setopt (curl, CURLOPT_NOSIGNAL, 1L);
131 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, nginx_curl_callback);
132 curl_easy_setopt (curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
133 curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, nginx_curl_error);
135 if (user != NULL)
136 {
137 #ifdef HAVE_CURLOPT_USERNAME
138 curl_easy_setopt (curl, CURLOPT_USERNAME, user);
139 curl_easy_setopt (curl, CURLOPT_PASSWORD, (pass == NULL) ? "" : pass);
140 #else
141 static char credentials[1024];
142 int status = ssnprintf (credentials, sizeof (credentials),
143 "%s:%s", user, pass == NULL ? "" : pass);
144 if ((status < 0) || ((size_t) status >= sizeof (credentials)))
145 {
146 ERROR ("nginx plugin: Credentials would have been truncated.");
147 return (-1);
148 }
150 curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
151 #endif
152 }
154 if (url != NULL)
155 {
156 curl_easy_setopt (curl, CURLOPT_URL, url);
157 }
159 curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1L);
160 curl_easy_setopt (curl, CURLOPT_MAXREDIRS, 50L);
162 if ((verify_peer == NULL) || IS_TRUE (verify_peer))
163 {
164 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 1L);
165 }
166 else
167 {
168 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0L);
169 }
171 if ((verify_host == NULL) || IS_TRUE (verify_host))
172 {
173 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 2L);
174 }
175 else
176 {
177 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0L);
178 }
180 if (cacert != NULL)
181 {
182 curl_easy_setopt (curl, CURLOPT_CAINFO, cacert);
183 }
185 #ifdef HAVE_CURLOPT_TIMEOUT_MS
186 if (timeout != NULL)
187 {
188 curl_easy_setopt (curl, CURLOPT_TIMEOUT_MS, atol(timeout));
189 }
190 else
191 {
192 curl_easy_setopt (curl, CURLOPT_TIMEOUT_MS, (long) CDTIME_T_TO_MS(plugin_get_interval()));
193 }
194 #endif
196 return (0);
197 } /* void init */
199 static void submit (const char *type, const char *inst, long long value)
200 {
201 value_t values[1];
202 value_list_t vl = VALUE_LIST_INIT;
204 if (strcmp (type, "nginx_connections") == 0)
205 values[0].gauge = value;
206 else if (strcmp (type, "nginx_requests") == 0)
207 values[0].derive = value;
208 else if (strcmp (type, "connections") == 0)
209 values[0].derive = value;
210 else
211 return;
213 vl.values = values;
214 vl.values_len = 1;
215 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
216 sstrncpy (vl.plugin, "nginx", sizeof (vl.plugin));
217 sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
218 sstrncpy (vl.type, type, sizeof (vl.type));
220 if (inst != NULL)
221 sstrncpy (vl.type_instance, inst, sizeof (vl.type_instance));
223 plugin_dispatch_values (&vl);
224 } /* void submit */
226 static int nginx_read (void)
227 {
228 char *ptr;
229 char *lines[16];
230 int lines_num = 0;
231 char *saveptr;
233 char *fields[16];
234 int fields_num;
236 if (curl == NULL)
237 return (-1);
238 if (url == NULL)
239 return (-1);
241 nginx_buffer_len = 0;
242 if (curl_easy_perform (curl) != CURLE_OK)
243 {
244 WARNING ("nginx plugin: curl_easy_perform failed: %s", nginx_curl_error);
245 return (-1);
246 }
248 ptr = nginx_buffer;
249 saveptr = NULL;
250 while ((lines[lines_num] = strtok_r (ptr, "\n\r", &saveptr)) != NULL)
251 {
252 ptr = NULL;
253 lines_num++;
255 if (lines_num >= 16)
256 break;
257 }
259 /*
260 * Active connections: 291
261 * server accepts handled requests
262 * 16630948 16630948 31070465
263 * Reading: 6 Writing: 179 Waiting: 106
264 */
265 for (int i = 0; i < lines_num; i++)
266 {
267 fields_num = strsplit (lines[i], fields,
268 (sizeof (fields) / sizeof (fields[0])));
270 if (fields_num == 3)
271 {
272 if ((strcmp (fields[0], "Active") == 0)
273 && (strcmp (fields[1], "connections:") == 0))
274 {
275 submit ("nginx_connections", "active", atoll (fields[2]));
276 }
277 else if ((atoll (fields[0]) != 0)
278 && (atoll (fields[1]) != 0)
279 && (atoll (fields[2]) != 0))
280 {
281 submit ("connections", "accepted", atoll (fields[0]));
282 submit ("connections", "handled", atoll (fields[1]));
283 submit ("nginx_requests", NULL, atoll (fields[2]));
284 }
285 }
286 else if (fields_num == 6)
287 {
288 if ((strcmp (fields[0], "Reading:") == 0)
289 && (strcmp (fields[2], "Writing:") == 0)
290 && (strcmp (fields[4], "Waiting:") == 0))
291 {
292 submit ("nginx_connections", "reading", atoll (fields[1]));
293 submit ("nginx_connections", "writing", atoll (fields[3]));
294 submit ("nginx_connections", "waiting", atoll (fields[5]));
295 }
296 }
297 }
299 nginx_buffer_len = 0;
301 return (0);
302 } /* int nginx_read */
304 void module_register (void)
305 {
306 plugin_register_config ("nginx", config, config_keys, config_keys_num);
307 plugin_register_init ("nginx", init);
308 plugin_register_read ("nginx", nginx_read);
309 } /* void module_register */
311 /*
312 * vim: set shiftwidth=2 softtabstop=2 tabstop=8 :
313 */