1 /**
2 * collectd - src/nginx.c
3 * Copyright (C) 2006,2007 Florian octo Forster
4 * Copyright (C) 2008 Sebastian Harl
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Florian octo Forster <octo at verplant.org>
22 * Sebastian Harl <sh at tokkee.org>
23 **/
25 #include "collectd.h"
26 #include "common.h"
27 #include "plugin.h"
28 #include "configfile.h"
30 #include <curl/curl.h>
32 static char *url = NULL;
33 static char *user = NULL;
34 static char *pass = NULL;
35 static char *verify_peer = NULL;
36 static char *verify_host = NULL;
37 static char *cacert = NULL;
39 static CURL *curl = NULL;
41 #define ABUFFER_SIZE 16384
42 static char nginx_buffer[ABUFFER_SIZE];
43 static int nginx_buffer_len = 0;
44 static char nginx_curl_error[CURL_ERROR_SIZE];
46 static const char *config_keys[] =
47 {
48 "URL",
49 "User",
50 "Password",
51 "VerifyPeer",
52 "VerifyHost",
53 "CACert"
54 };
55 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
57 static size_t nginx_curl_callback (void *buf, size_t size, size_t nmemb,
58 void __attribute__((unused)) *stream)
59 {
60 size_t len = size * nmemb;
62 if ((nginx_buffer_len + len) >= ABUFFER_SIZE)
63 {
64 len = (ABUFFER_SIZE - 1) - nginx_buffer_len;
65 }
67 if (len <= 0)
68 return (len);
70 memcpy (nginx_buffer + nginx_buffer_len, (char *) buf, len);
71 nginx_buffer_len += len;
72 nginx_buffer[nginx_buffer_len] = '\0';
74 return (len);
75 }
77 static int config_set (char **var, const char *value)
78 {
79 if (*var != NULL)
80 {
81 free (*var);
82 *var = NULL;
83 }
85 if ((*var = strdup (value)) == NULL)
86 return (1);
87 else
88 return (0);
89 }
91 static int config (const char *key, const char *value)
92 {
93 if (strcasecmp (key, "url") == 0)
94 return (config_set (&url, value));
95 else if (strcasecmp (key, "user") == 0)
96 return (config_set (&user, value));
97 else if (strcasecmp (key, "password") == 0)
98 return (config_set (&pass, value));
99 else if (strcasecmp (key, "verifypeer") == 0)
100 return (config_set (&verify_peer, value));
101 else if (strcasecmp (key, "verifyhost") == 0)
102 return (config_set (&verify_host, value));
103 else if (strcasecmp (key, "cacert") == 0)
104 return (config_set (&cacert, value));
105 else
106 return (-1);
107 } /* int config */
109 static int init (void)
110 {
111 static char credentials[1024];
113 if (curl != NULL)
114 curl_easy_cleanup (curl);
116 if ((curl = curl_easy_init ()) == NULL)
117 {
118 ERROR ("nginx plugin: curl_easy_init failed.");
119 return (-1);
120 }
122 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, nginx_curl_callback);
123 curl_easy_setopt (curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
124 curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, nginx_curl_error);
126 if (user != NULL)
127 {
128 int status = ssnprintf (credentials, sizeof (credentials),
129 "%s:%s", user, pass == NULL ? "" : pass);
130 if ((status < 0) || ((size_t) status >= sizeof (credentials)))
131 {
132 ERROR ("nginx plugin: Credentials would have been truncated.");
133 return (-1);
134 }
136 curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
137 }
139 if (url != NULL)
140 {
141 curl_easy_setopt (curl, CURLOPT_URL, url);
142 }
144 curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1);
146 if ((verify_peer == NULL) || IS_TRUE (verify_peer))
147 {
148 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 1);
149 }
150 else
151 {
152 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0);
153 }
155 if ((verify_host == NULL) || IS_TRUE (verify_host))
156 {
157 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 2);
158 }
159 else
160 {
161 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0);
162 }
164 if (cacert != NULL)
165 {
166 curl_easy_setopt (curl, CURLOPT_CAINFO, cacert);
167 }
169 return (0);
170 } /* void init */
172 static void submit (char *type, char *inst, long long value)
173 {
174 value_t values[1];
175 value_list_t vl = VALUE_LIST_INIT;
177 if (strcmp (type, "nginx_connections") == 0)
178 values[0].gauge = value;
179 else if (strcmp (type, "nginx_requests") == 0)
180 values[0].counter = value;
181 else
182 return;
184 vl.values = values;
185 vl.values_len = 1;
186 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
187 sstrncpy (vl.plugin, "nginx", sizeof (vl.plugin));
188 sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
189 sstrncpy (vl.type, type, sizeof (vl.type));
191 if (inst != NULL)
192 sstrncpy (vl.type_instance, inst, sizeof (vl.type_instance));
194 plugin_dispatch_values (&vl);
195 } /* void submit */
197 static int nginx_read (void)
198 {
199 int i;
201 char *ptr;
202 char *lines[16];
203 int lines_num = 0;
204 char *saveptr;
206 char *fields[16];
207 int fields_num;
209 if (curl == NULL)
210 return (-1);
211 if (url == NULL)
212 return (-1);
214 nginx_buffer_len = 0;
215 if (curl_easy_perform (curl) != 0)
216 {
217 WARNING ("nginx plugin: curl_easy_perform failed: %s", nginx_curl_error);
218 return (-1);
219 }
221 ptr = nginx_buffer;
222 saveptr = NULL;
223 while ((lines[lines_num] = strtok_r (ptr, "\n\r", &saveptr)) != NULL)
224 {
225 ptr = NULL;
226 lines_num++;
228 if (lines_num >= 16)
229 break;
230 }
232 /*
233 * Active connections: 291
234 * server accepts handled requests
235 * 16630948 16630948 31070465
236 * Reading: 6 Writing: 179 Waiting: 106
237 */
238 for (i = 0; i < lines_num; i++)
239 {
240 fields_num = strsplit (lines[i], fields,
241 (sizeof (fields) / sizeof (fields[0])));
243 if (fields_num == 3)
244 {
245 if ((strcmp (fields[0], "Active") == 0)
246 && (strcmp (fields[1], "connections:") == 0))
247 {
248 submit ("nginx_connections", "active", atoll (fields[2]));
249 }
250 else if ((atoll (fields[0]) != 0)
251 && (atoll (fields[1]) != 0)
252 && (atoll (fields[2]) != 0))
253 {
254 submit ("nginx_requests", NULL, atoll (fields[2]));
255 }
256 }
257 else if (fields_num == 6)
258 {
259 if ((strcmp (fields[0], "Reading:") == 0)
260 && (strcmp (fields[2], "Writing:") == 0)
261 && (strcmp (fields[4], "Waiting:") == 0))
262 {
263 submit ("nginx_connections", "reading", atoll (fields[1]));
264 submit ("nginx_connections", "writing", atoll (fields[3]));
265 submit ("nginx_connections", "waiting", atoll (fields[5]));
266 }
267 }
268 }
270 nginx_buffer_len = 0;
272 return (0);
273 } /* int nginx_read */
275 void module_register (void)
276 {
277 plugin_register_config ("nginx", config, config_keys, config_keys_num);
278 plugin_register_init ("nginx", init);
279 plugin_register_read ("nginx", nginx_read);
280 } /* void module_register */
282 /*
283 * vim: set shiftwidth=2 softtabstop=2 tabstop=8 :
284 */