1 /**
2 * collectd - src/nginx.c
3 * Copyright (C) 2006,2007 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Florian octo Forster <octo at verplant.org>
21 **/
23 #include "collectd.h"
24 #include "common.h"
25 #include "plugin.h"
26 #include "configfile.h"
28 #include <curl/curl.h>
30 static char *url = NULL;
31 static char *user = NULL;
32 static char *pass = NULL;
33 static char *verify_peer = NULL;
34 static char *verify_host = NULL;
35 static char *cacert = NULL;
37 static CURL *curl = NULL;
39 #define ABUFFER_SIZE 16384
40 static char nginx_buffer[ABUFFER_SIZE];
41 static int nginx_buffer_len = 0;
42 static char nginx_curl_error[CURL_ERROR_SIZE];
44 static const char *config_keys[] =
45 {
46 "URL",
47 "User",
48 "Password",
49 "VerifyPeer",
50 "VerifyHost",
51 "CACert"
52 };
53 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
55 static size_t nginx_curl_callback (void *buf, size_t size, size_t nmemb,
56 void __attribute__((unused)) *stream)
57 {
58 size_t len = size * nmemb;
60 if ((nginx_buffer_len + len) >= ABUFFER_SIZE)
61 {
62 len = (ABUFFER_SIZE - 1) - nginx_buffer_len;
63 }
65 if (len <= 0)
66 return (len);
68 memcpy (nginx_buffer + nginx_buffer_len, (char *) buf, len);
69 nginx_buffer_len += len;
70 nginx_buffer[nginx_buffer_len] = '\0';
72 return (len);
73 }
75 static int config_set (char **var, const char *value)
76 {
77 if (*var != NULL)
78 {
79 free (*var);
80 *var = NULL;
81 }
83 if ((*var = strdup (value)) == NULL)
84 return (1);
85 else
86 return (0);
87 }
89 static int config (const char *key, const char *value)
90 {
91 if (strcasecmp (key, "url") == 0)
92 return (config_set (&url, value));
93 else if (strcasecmp (key, "user") == 0)
94 return (config_set (&user, value));
95 else if (strcasecmp (key, "password") == 0)
96 return (config_set (&pass, value));
97 else if (strcasecmp (key, "verifypeer") == 0)
98 return (config_set (&verify_peer, value));
99 else if (strcasecmp (key, "verifyhost") == 0)
100 return (config_set (&verify_host, value));
101 else if (strcasecmp (key, "cacert") == 0)
102 return (config_set (&cacert, value));
103 else
104 return (-1);
105 } /* int config */
107 static int init (void)
108 {
109 static char credentials[1024];
111 if (curl != NULL)
112 curl_easy_cleanup (curl);
114 if ((curl = curl_easy_init ()) == NULL)
115 {
116 ERROR ("nginx plugin: curl_easy_init failed.");
117 return (-1);
118 }
120 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, nginx_curl_callback);
121 curl_easy_setopt (curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
122 curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, nginx_curl_error);
124 if (user != NULL)
125 {
126 int status = ssnprintf (credentials, sizeof (credentials),
127 "%s:%s", user, pass == NULL ? "" : pass);
128 if ((status < 0) || ((size_t) status >= sizeof (credentials)))
129 {
130 ERROR ("nginx plugin: Credentials would have been truncated.");
131 return (-1);
132 }
134 curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
135 }
137 if (url != NULL)
138 {
139 curl_easy_setopt (curl, CURLOPT_URL, url);
140 }
142 if ((verify_peer == NULL) || (strcmp (verify_peer, "true") == 0))
143 {
144 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 1);
145 }
146 else
147 {
148 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0);
149 }
151 if ((verify_host == NULL) || (strcmp (verify_host, "true") == 0))
152 {
153 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 2);
154 }
155 else
156 {
157 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0);
158 }
160 if (cacert != NULL)
161 {
162 curl_easy_setopt (curl, CURLOPT_CAINFO, cacert);
163 }
165 return (0);
166 } /* void init */
168 static void submit (char *type, char *inst, long long value)
169 {
170 value_t values[1];
171 value_list_t vl = VALUE_LIST_INIT;
173 if (strcmp (type, "nginx_connections") == 0)
174 values[0].gauge = value;
175 else if (strcmp (type, "nginx_requests") == 0)
176 values[0].counter = value;
177 else
178 return;
180 vl.values = values;
181 vl.values_len = 1;
182 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
183 sstrncpy (vl.plugin, "nginx", sizeof (vl.plugin));
184 sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
185 sstrncpy (vl.type, type, sizeof (vl.type));
187 if (inst != NULL)
188 sstrncpy (vl.type_instance, inst, sizeof (vl.type_instance));
190 plugin_dispatch_values (&vl);
191 } /* void submit */
193 static int nginx_read (void)
194 {
195 int i;
197 char *ptr;
198 char *lines[16];
199 int lines_num = 0;
200 char *saveptr;
202 char *fields[16];
203 int fields_num;
205 if (curl == NULL)
206 return (-1);
207 if (url == NULL)
208 return (-1);
210 nginx_buffer_len = 0;
211 if (curl_easy_perform (curl) != 0)
212 {
213 WARNING ("nginx plugin: curl_easy_perform failed: %s", nginx_curl_error);
214 return (-1);
215 }
217 ptr = nginx_buffer;
218 saveptr = NULL;
219 while ((lines[lines_num] = strtok_r (ptr, "\n\r", &saveptr)) != NULL)
220 {
221 ptr = NULL;
222 lines_num++;
224 if (lines_num >= 16)
225 break;
226 }
228 /*
229 * Active connections: 291
230 * server accepts handled requests
231 * 16630948 16630948 31070465
232 * Reading: 6 Writing: 179 Waiting: 106
233 */
234 for (i = 0; i < lines_num; i++)
235 {
236 fields_num = strsplit (lines[i], fields,
237 (sizeof (fields) / sizeof (fields[0])));
239 if (fields_num == 3)
240 {
241 if ((strcmp (fields[0], "Active") == 0)
242 && (strcmp (fields[1], "connections:") == 0))
243 {
244 submit ("nginx_connections", "active", atoll (fields[2]));
245 }
246 else if ((atoll (fields[0]) != 0)
247 && (atoll (fields[1]) != 0)
248 && (atoll (fields[2]) != 0))
249 {
250 submit ("nginx_requests", NULL, atoll (fields[2]));
251 }
252 }
253 else if (fields_num == 6)
254 {
255 if ((strcmp (fields[0], "Reading:") == 0)
256 && (strcmp (fields[2], "Writing:") == 0)
257 && (strcmp (fields[4], "Waiting:") == 0))
258 {
259 submit ("nginx_connections", "reading", atoll (fields[1]));
260 submit ("nginx_connections", "writing", atoll (fields[3]));
261 submit ("nginx_connections", "waiting", atoll (fields[5]));
262 }
263 }
264 }
266 nginx_buffer_len = 0;
268 return (0);
269 } /* int nginx_read */
271 void module_register (void)
272 {
273 plugin_register_config ("nginx", config, config_keys, config_keys_num);
274 plugin_register_init ("nginx", init);
275 plugin_register_read ("nginx", nginx_read);
276 } /* void module_register */
278 /*
279 * vim: set shiftwidth=2 softtabstop=2 tabstop=8 :
280 */