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, void *stream)
56 {
57 size_t len = size * nmemb;
59 if ((nginx_buffer_len + len) >= ABUFFER_SIZE)
60 {
61 len = (ABUFFER_SIZE - 1) - nginx_buffer_len;
62 }
64 if (len <= 0)
65 return (len);
67 memcpy (nginx_buffer + nginx_buffer_len, (char *) buf, len);
68 nginx_buffer_len += len;
69 nginx_buffer[nginx_buffer_len] = '\0';
71 return (len);
72 }
74 static int config_set (char **var, const char *value)
75 {
76 if (*var != NULL)
77 {
78 free (*var);
79 *var = NULL;
80 }
82 if ((*var = strdup (value)) == NULL)
83 return (1);
84 else
85 return (0);
86 }
88 static int config (const char *key, const char *value)
89 {
90 if (strcasecmp (key, "url") == 0)
91 return (config_set (&url, value));
92 else if (strcasecmp (key, "user") == 0)
93 return (config_set (&user, value));
94 else if (strcasecmp (key, "password") == 0)
95 return (config_set (&pass, value));
96 else if (strcasecmp (key, "verifypeer") == 0)
97 return (config_set (&verify_peer, value));
98 else if (strcasecmp (key, "verifyhost") == 0)
99 return (config_set (&verify_host, value));
100 else if (strcasecmp (key, "cacert") == 0)
101 return (config_set (&cacert, value));
102 else
103 return (-1);
104 } /* int config */
106 static int init (void)
107 {
108 static char credentials[1024];
110 if (curl != NULL)
111 curl_easy_cleanup (curl);
113 if ((curl = curl_easy_init ()) == NULL)
114 {
115 ERROR ("nginx plugin: curl_easy_init failed.");
116 return (-1);
117 }
119 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, nginx_curl_callback);
120 curl_easy_setopt (curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
121 curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, nginx_curl_error);
123 if (user != NULL)
124 {
125 if (snprintf (credentials, 1024, "%s:%s", user, pass == NULL ? "" : pass) >= 1024)
126 {
127 ERROR ("nginx plugin: Credentials would have been truncated.");
128 return (-1);
129 }
131 curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
132 }
134 if (url != NULL)
135 {
136 curl_easy_setopt (curl, CURLOPT_URL, url);
137 }
139 if ((verify_peer == NULL) || (strcmp (verify_peer, "true") == 0))
140 {
141 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 1);
142 }
143 else
144 {
145 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0);
146 }
148 if ((verify_host == NULL) || (strcmp (verify_host, "true") == 0))
149 {
150 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 2);
151 }
152 else
153 {
154 curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0);
155 }
157 if (cacert != NULL)
158 {
159 curl_easy_setopt (curl, CURLOPT_CAINFO, cacert);
160 }
162 return (0);
163 } /* void init */
165 static void submit (char *type, char *inst, long long value)
166 {
167 value_t values[1];
168 value_list_t vl = VALUE_LIST_INIT;
170 if (strcmp (type, "nginx_connections") == 0)
171 values[0].gauge = value;
172 else if (strcmp (type, "nginx_requests") == 0)
173 values[0].counter = value;
174 else
175 return;
177 vl.values = values;
178 vl.values_len = 1;
179 vl.time = time (NULL);
180 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
181 sstrncpy (vl.plugin, "nginx", sizeof (vl.plugin));
182 sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
184 if (inst != NULL)
185 {
186 strncpy (vl.type_instance, inst, sizeof (vl.type_instance));
187 vl.type_instance[sizeof (vl.type_instance) - 1] = '\0';
188 }
190 plugin_dispatch_values (type, &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 */