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"
30 #include "common.h"
31 #include "plugin.h"
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[] =
50 {
51 "URL",
52 "User",
53 "Password",
54 "VerifyPeer",
55 "VerifyHost",
56 "CACert"
57 };
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)
62 {
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))
67 {
68 assert (sizeof (nginx_buffer) > nginx_buffer_len);
69 len = (sizeof (nginx_buffer) - 1) - nginx_buffer_len;
70 }
72 if (len <= 0)
73 return (len);
75 memcpy (&nginx_buffer[nginx_buffer_len], buf, len);
76 nginx_buffer_len += len;
77 nginx_buffer[nginx_buffer_len] = 0;
79 return (len);
80 }
82 static int config_set (char **var, const char *value)
83 {
84 if (*var != NULL)
85 {
86 free (*var);
87 *var = NULL;
88 }
90 if ((*var = strdup (value)) == NULL)
91 return (1);
92 else
93 return (0);
94 }
96 static int config (const char *key, const char *value)
97 {
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));
110 else
111 return (-1);
112 } /* int config */
114 static int init (void)
115 {
116 static char credentials[1024];
118 if (curl != NULL)
119 curl_easy_cleanup (curl);
121 if ((curl = curl_easy_init ()) == NULL)
122 {
123 ERROR ("nginx plugin: curl_easy_init failed.");
124 return (-1);
125 }
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);
132 if (user != NULL)
133 {
134 int status = ssnprintf (credentials, sizeof (credentials),
135 "%s:%s", user, pass == NULL ? "" : pass);
136 if ((status < 0) || ((size_t) status >= sizeof (credentials)))
137 {
138 ERROR ("nginx plugin: Credentials would have been truncated.");
139 return (-1);
140 }
142 curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
143 }
145 if (url != NULL)
146 {
147 curl_easy_setopt (curl, CURLOPT_URL, url);
148 }
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))
154 {
155 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 1L);
156 }
157 else
158 {
159 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0L);
160 }
162 if ((verify_host == NULL) || IS_TRUE (verify_host))
163 {
164 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 2L);
165 }
166 else
167 {
168 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0L);
169 }
171 if (cacert != NULL)
172 {
173 curl_easy_setopt (curl, CURLOPT_CAINFO, cacert);
174 }
176 return (0);
177 } /* void init */
179 static void submit (char *type, char *inst, long long value)
180 {
181 value_t values[1];
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;
190 else
191 return;
193 vl.values = values;
194 vl.values_len = 1;
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));
200 if (inst != NULL)
201 sstrncpy (vl.type_instance, inst, sizeof (vl.type_instance));
203 plugin_dispatch_values (&vl);
204 } /* void submit */
206 static int nginx_read (void)
207 {
208 int i;
210 char *ptr;
211 char *lines[16];
212 int lines_num = 0;
213 char *saveptr;
215 char *fields[16];
216 int fields_num;
218 if (curl == NULL)
219 return (-1);
220 if (url == NULL)
221 return (-1);
223 nginx_buffer_len = 0;
224 if (curl_easy_perform (curl) != CURLE_OK)
225 {
226 WARNING ("nginx plugin: curl_easy_perform failed: %s", nginx_curl_error);
227 return (-1);
228 }
230 ptr = nginx_buffer;
231 saveptr = NULL;
232 while ((lines[lines_num] = strtok_r (ptr, "\n\r", &saveptr)) != NULL)
233 {
234 ptr = NULL;
235 lines_num++;
237 if (lines_num >= 16)
238 break;
239 }
241 /*
242 * Active connections: 291
243 * server accepts handled requests
244 * 16630948 16630948 31070465
245 * Reading: 6 Writing: 179 Waiting: 106
246 */
247 for (i = 0; i < lines_num; i++)
248 {
249 fields_num = strsplit (lines[i], fields,
250 (sizeof (fields) / sizeof (fields[0])));
252 if (fields_num == 3)
253 {
254 if ((strcmp (fields[0], "Active") == 0)
255 && (strcmp (fields[1], "connections:") == 0))
256 {
257 submit ("nginx_connections", "active", atoll (fields[2]));
258 }
259 else if ((atoll (fields[0]) != 0)
260 && (atoll (fields[1]) != 0)
261 && (atoll (fields[2]) != 0))
262 {
263 submit ("connections", "accepted", atoll (fields[0]));
264 submit ("connections", "handled", atoll (fields[1]));
265 submit ("nginx_requests", NULL, atoll (fields[2]));
266 }
267 }
268 else if (fields_num == 6)
269 {
270 if ((strcmp (fields[0], "Reading:") == 0)
271 && (strcmp (fields[2], "Writing:") == 0)
272 && (strcmp (fields[4], "Waiting:") == 0))
273 {
274 submit ("nginx_connections", "reading", atoll (fields[1]));
275 submit ("nginx_connections", "writing", atoll (fields[3]));
276 submit ("nginx_connections", "waiting", atoll (fields[5]));
277 }
278 }
279 }
281 nginx_buffer_len = 0;
283 return (0);
284 } /* int nginx_read */
286 void module_register (void)
287 {
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 */
293 /*
294 * vim: set shiftwidth=2 softtabstop=2 tabstop=8 :
295 */