1 /**
2 * collectd - src/curl.c
3 * Copyright (C) 2006-2009 Florian octo Forster
4 * Copyright (C) 2009 Aman Gupta
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; only version 2 of the License is applicable.
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 * Aman Gupta <aman at tmm1.net>
22 **/
24 #include "collectd.h"
25 #include "common.h"
26 #include "plugin.h"
27 #include "configfile.h"
28 #include "utils_match.h"
30 #include <curl/curl.h>
32 /*
33 * Data types
34 */
35 struct web_match_s;
36 typedef struct web_match_s web_match_t;
37 struct web_match_s /* {{{ */
38 {
39 char *regex;
40 char *exclude_regex;
41 int dstype;
42 char *type;
43 char *instance;
45 cu_match_t *match;
47 web_match_t *next;
48 }; /* }}} */
50 struct web_page_s;
51 typedef struct web_page_s web_page_t;
52 struct web_page_s /* {{{ */
53 {
54 char *instance;
56 char *url;
57 char *user;
58 char *pass;
59 char *credentials;
60 int verify_peer;
61 int verify_host;
62 char *cacert;
63 int response_time;
65 CURL *curl;
66 char curl_errbuf[CURL_ERROR_SIZE];
67 char *buffer;
68 size_t buffer_size;
69 size_t buffer_fill;
71 web_match_t *matches;
73 web_page_t *next;
74 }; /* }}} */
76 /*
77 * Global variables;
78 */
79 /* static CURLM *curl = NULL; */
80 static web_page_t *pages_g = NULL;
82 /*
83 * Private functions
84 */
85 static size_t cc_curl_callback (void *buf, /* {{{ */
86 size_t size, size_t nmemb, void *user_data)
87 {
88 web_page_t *wp;
89 size_t len;
91 len = size * nmemb;
92 if (len <= 0)
93 return (len);
95 wp = user_data;
96 if (wp == NULL)
97 return (0);
99 if ((wp->buffer_fill + len) >= wp->buffer_size)
100 {
101 char *temp;
102 size_t temp_size;
104 temp_size = wp->buffer_fill + len + 1;
105 temp = (char *) realloc (wp->buffer, temp_size);
106 if (temp == NULL)
107 {
108 ERROR ("curl plugin: realloc failed.");
109 return (0);
110 }
111 wp->buffer = temp;
112 wp->buffer_size = temp_size;
113 }
115 memcpy (wp->buffer + wp->buffer_fill, (char *) buf, len);
116 wp->buffer_fill += len;
117 wp->buffer[wp->buffer_fill] = 0;
119 return (len);
120 } /* }}} size_t cc_curl_callback */
122 static void cc_web_match_free (web_match_t *wm) /* {{{ */
123 {
124 if (wm == NULL)
125 return;
127 sfree (wm->regex);
128 sfree (wm->type);
129 sfree (wm->instance);
130 match_destroy (wm->match);
131 cc_web_match_free (wm->next);
132 sfree (wm);
133 } /* }}} void cc_web_match_free */
135 static void cc_web_page_free (web_page_t *wp) /* {{{ */
136 {
137 if (wp == NULL)
138 return;
140 if (wp->curl != NULL)
141 curl_easy_cleanup (wp->curl);
142 wp->curl = NULL;
144 sfree (wp->instance);
146 sfree (wp->url);
147 sfree (wp->user);
148 sfree (wp->pass);
149 sfree (wp->credentials);
150 sfree (wp->cacert);
152 sfree (wp->buffer);
154 cc_web_match_free (wp->matches);
155 cc_web_page_free (wp->next);
156 sfree (wp);
157 } /* }}} void cc_web_page_free */
159 static int cc_config_add_string (const char *name, char **dest, /* {{{ */
160 oconfig_item_t *ci)
161 {
162 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
163 {
164 WARNING ("curl plugin: `%s' needs exactly one string argument.", name);
165 return (-1);
166 }
168 sfree (*dest);
169 *dest = strdup (ci->values[0].value.string);
170 if (*dest == NULL)
171 return (-1);
173 return (0);
174 } /* }}} int cc_config_add_string */
176 static int cc_config_set_boolean (const char *name, int *dest, /* {{{ */
177 oconfig_item_t *ci)
178 {
179 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
180 {
181 WARNING ("curl plugin: `%s' needs exactly one boolean argument.", name);
182 return (-1);
183 }
185 *dest = ci->values[0].value.boolean ? 1 : 0;
187 return (0);
188 } /* }}} int cc_config_set_boolean */
190 static int cc_config_add_match_dstype (int *dstype_ret, /* {{{ */
191 oconfig_item_t *ci)
192 {
193 int dstype;
195 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
196 {
197 WARNING ("curl plugin: `DSType' needs exactly one string argument.");
198 return (-1);
199 }
201 if (strncasecmp ("Gauge", ci->values[0].value.string,
202 strlen ("Gauge")) == 0)
203 {
204 dstype = UTILS_MATCH_DS_TYPE_GAUGE;
205 if (strcasecmp ("GaugeAverage", ci->values[0].value.string) == 0)
206 dstype |= UTILS_MATCH_CF_GAUGE_AVERAGE;
207 else if (strcasecmp ("GaugeMin", ci->values[0].value.string) == 0)
208 dstype |= UTILS_MATCH_CF_GAUGE_MIN;
209 else if (strcasecmp ("GaugeMax", ci->values[0].value.string) == 0)
210 dstype |= UTILS_MATCH_CF_GAUGE_MAX;
211 else if (strcasecmp ("GaugeLast", ci->values[0].value.string) == 0)
212 dstype |= UTILS_MATCH_CF_GAUGE_LAST;
213 else
214 dstype = 0;
215 }
216 else if (strncasecmp ("Counter", ci->values[0].value.string,
217 strlen ("Counter")) == 0)
218 {
219 dstype = UTILS_MATCH_DS_TYPE_COUNTER;
220 if (strcasecmp ("CounterSet", ci->values[0].value.string) == 0)
221 dstype |= UTILS_MATCH_CF_COUNTER_SET;
222 else if (strcasecmp ("CounterAdd", ci->values[0].value.string) == 0)
223 dstype |= UTILS_MATCH_CF_COUNTER_ADD;
224 else if (strcasecmp ("CounterInc", ci->values[0].value.string) == 0)
225 dstype |= UTILS_MATCH_CF_COUNTER_INC;
226 else
227 dstype = 0;
228 }
229 else if (strncasecmp ("Derive", ci->values[0].value.string,
230 strlen ("Derive")) == 0)
231 {
232 dstype = UTILS_MATCH_DS_TYPE_DERIVE;
233 if (strcasecmp ("DeriveSet", ci->values[0].value.string) == 0)
234 dstype |= UTILS_MATCH_CF_DERIVE_SET;
235 else if (strcasecmp ("DeriveAdd", ci->values[0].value.string) == 0)
236 dstype |= UTILS_MATCH_CF_DERIVE_ADD;
237 else if (strcasecmp ("DeriveInc", ci->values[0].value.string) == 0)
238 dstype |= UTILS_MATCH_CF_DERIVE_INC;
239 else
240 dstype = 0;
241 }
242 else if (strncasecmp ("Absolute", ci->values[0].value.string,
243 strlen ("Absolute")) == 0)
244 {
245 dstype = UTILS_MATCH_DS_TYPE_ABSOLUTE;
246 if (strcasecmp ("AbsoluteSet", ci->values[0].value.string) == 0) /* Absolute DS is reset-on-read so no sense doin anything else but set */
247 dstype |= UTILS_MATCH_CF_ABSOLUTE_SET;
248 else
249 dstype = 0;
250 }
252 else
253 {
254 dstype = 0;
255 }
257 if (dstype == 0)
258 {
259 WARNING ("curl plugin: `%s' is not a valid argument to `DSType'.",
260 ci->values[0].value.string);
261 return (-1);
262 }
264 *dstype_ret = dstype;
265 return (0);
266 } /* }}} int cc_config_add_match_dstype */
268 static int cc_config_add_match (web_page_t *page, /* {{{ */
269 oconfig_item_t *ci)
270 {
271 web_match_t *match;
272 int status;
273 int i;
275 if (ci->values_num != 0)
276 {
277 WARNING ("curl plugin: Ignoring arguments for the `Match' block.");
278 }
280 match = (web_match_t *) malloc (sizeof (*match));
281 if (match == NULL)
282 {
283 ERROR ("curl plugin: malloc failed.");
284 return (-1);
285 }
286 memset (match, 0, sizeof (*match));
288 status = 0;
289 for (i = 0; i < ci->children_num; i++)
290 {
291 oconfig_item_t *child = ci->children + i;
293 if (strcasecmp ("Regex", child->key) == 0)
294 status = cc_config_add_string ("Regex", &match->regex, child);
295 else if (strcasecmp ("ExcludeRegex", child->key) == 0)
296 status = cc_config_add_string ("ExcludeRegex", &match->exclude_regex, child);
297 else if (strcasecmp ("DSType", child->key) == 0)
298 status = cc_config_add_match_dstype (&match->dstype, child);
299 else if (strcasecmp ("Type", child->key) == 0)
300 status = cc_config_add_string ("Type", &match->type, child);
301 else if (strcasecmp ("Instance", child->key) == 0)
302 status = cc_config_add_string ("Instance", &match->instance, child);
303 else
304 {
305 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
306 status = -1;
307 }
309 if (status != 0)
310 break;
311 } /* for (i = 0; i < ci->children_num; i++) */
313 while (status == 0)
314 {
315 if (match->regex == NULL)
316 {
317 WARNING ("curl plugin: `Regex' missing in `Match' block.");
318 status = -1;
319 }
321 if (match->type == NULL)
322 {
323 WARNING ("curl plugin: `Type' missing in `Match' block.");
324 status = -1;
325 }
327 if (match->dstype == 0)
328 {
329 WARNING ("curl plugin: `DSType' missing in `Match' block.");
330 status = -1;
331 }
333 break;
334 } /* while (status == 0) */
336 if (status != 0)
337 return (status);
339 match->match = match_create_simple (match->regex, match->exclude_regex,
340 match->dstype);
341 if (match->match == NULL)
342 {
343 ERROR ("curl plugin: tail_match_add_match_simple failed.");
344 cc_web_match_free (match);
345 return (-1);
346 }
347 else
348 {
349 web_match_t *prev;
351 prev = page->matches;
352 while ((prev != NULL) && (prev->next != NULL))
353 prev = prev->next;
355 if (prev == NULL)
356 page->matches = match;
357 else
358 prev->next = match;
359 }
361 return (0);
362 } /* }}} int cc_config_add_match */
364 static int cc_page_init_curl (web_page_t *wp) /* {{{ */
365 {
366 wp->curl = curl_easy_init ();
367 if (wp->curl == NULL)
368 {
369 ERROR ("curl plugin: curl_easy_init failed.");
370 return (-1);
371 }
373 curl_easy_setopt (wp->curl, CURLOPT_WRITEFUNCTION, cc_curl_callback);
374 curl_easy_setopt (wp->curl, CURLOPT_WRITEDATA, wp);
375 curl_easy_setopt (wp->curl, CURLOPT_USERAGENT,
376 PACKAGE_NAME"/"PACKAGE_VERSION);
377 curl_easy_setopt (wp->curl, CURLOPT_ERRORBUFFER, wp->curl_errbuf);
378 curl_easy_setopt (wp->curl, CURLOPT_URL, wp->url);
379 curl_easy_setopt (wp->curl, CURLOPT_FOLLOWLOCATION, 1);
381 if (wp->user != NULL)
382 {
383 size_t credentials_size;
385 credentials_size = strlen (wp->user) + 2;
386 if (wp->pass != NULL)
387 credentials_size += strlen (wp->pass);
389 wp->credentials = (char *) malloc (credentials_size);
390 if (wp->credentials == NULL)
391 {
392 ERROR ("curl plugin: malloc failed.");
393 return (-1);
394 }
396 ssnprintf (wp->credentials, credentials_size, "%s:%s",
397 wp->user, (wp->pass == NULL) ? "" : wp->pass);
398 curl_easy_setopt (wp->curl, CURLOPT_USERPWD, wp->credentials);
399 }
401 curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYPEER, wp->verify_peer);
402 curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYHOST,
403 wp->verify_host ? 2 : 0);
404 if (wp->cacert != NULL)
405 curl_easy_setopt (wp->curl, CURLOPT_CAINFO, wp->cacert);
407 return (0);
408 } /* }}} int cc_page_init_curl */
410 static int cc_config_add_page (oconfig_item_t *ci) /* {{{ */
411 {
412 web_page_t *page;
413 int status;
414 int i;
416 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
417 {
418 WARNING ("curl plugin: `Page' blocks need exactly one string argument.");
419 return (-1);
420 }
422 page = (web_page_t *) malloc (sizeof (*page));
423 if (page == NULL)
424 {
425 ERROR ("curl plugin: malloc failed.");
426 return (-1);
427 }
428 memset (page, 0, sizeof (*page));
429 page->url = NULL;
430 page->user = NULL;
431 page->pass = NULL;
432 page->verify_peer = 1;
433 page->verify_host = 1;
434 page->response_time = 0;
436 page->instance = strdup (ci->values[0].value.string);
437 if (page->instance == NULL)
438 {
439 ERROR ("curl plugin: strdup failed.");
440 sfree (page);
441 return (-1);
442 }
444 /* Process all children */
445 status = 0;
446 for (i = 0; i < ci->children_num; i++)
447 {
448 oconfig_item_t *child = ci->children + i;
450 if (strcasecmp ("URL", child->key) == 0)
451 status = cc_config_add_string ("URL", &page->url, child);
452 else if (strcasecmp ("User", child->key) == 0)
453 status = cc_config_add_string ("User", &page->user, child);
454 else if (strcasecmp ("Password", child->key) == 0)
455 status = cc_config_add_string ("Password", &page->pass, child);
456 else if (strcasecmp ("VerifyPeer", child->key) == 0)
457 status = cc_config_set_boolean ("VerifyPeer", &page->verify_peer, child);
458 else if (strcasecmp ("VerifyHost", child->key) == 0)
459 status = cc_config_set_boolean ("VerifyHost", &page->verify_host, child);
460 else if (strcasecmp ("MeasureResponseTime", child->key) == 0)
461 status = cc_config_set_boolean (child->key, &page->response_time, child);
462 else if (strcasecmp ("CACert", child->key) == 0)
463 status = cc_config_add_string ("CACert", &page->cacert, child);
464 else if (strcasecmp ("Match", child->key) == 0)
465 /* Be liberal with failing matches => don't set `status'. */
466 cc_config_add_match (page, child);
467 else
468 {
469 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
470 status = -1;
471 }
473 if (status != 0)
474 break;
475 } /* for (i = 0; i < ci->children_num; i++) */
477 /* Additionial sanity checks and libCURL initialization. */
478 while (status == 0)
479 {
480 if (page->url == NULL)
481 {
482 WARNING ("curl plugin: `URL' missing in `Page' block.");
483 status = -1;
484 }
486 if (page->matches == NULL && !page->response_time)
487 {
488 assert (page->instance != NULL);
489 WARNING ("curl plugin: No (valid) `Match' block "
490 "or MeasureResponseTime within `Page' block `%s'.", page->instance);
491 status = -1;
492 }
494 if (status == 0)
495 status = cc_page_init_curl (page);
497 break;
498 } /* while (status == 0) */
500 if (status != 0)
501 {
502 cc_web_page_free (page);
503 return (status);
504 }
506 /* Add the new page to the linked list */
507 if (pages_g == NULL)
508 pages_g = page;
509 else
510 {
511 web_page_t *prev;
513 prev = pages_g;
514 while ((prev != NULL) && (prev->next != NULL))
515 prev = prev->next;
516 prev->next = page;
517 }
519 return (0);
520 } /* }}} int cc_config_add_page */
522 static int cc_config (oconfig_item_t *ci) /* {{{ */
523 {
524 int success;
525 int errors;
526 int status;
527 int i;
529 success = 0;
530 errors = 0;
532 for (i = 0; i < ci->children_num; i++)
533 {
534 oconfig_item_t *child = ci->children + i;
536 if (strcasecmp ("Page", child->key) == 0)
537 {
538 status = cc_config_add_page (child);
539 if (status == 0)
540 success++;
541 else
542 errors++;
543 }
544 else
545 {
546 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
547 errors++;
548 }
549 }
551 if ((success == 0) && (errors > 0))
552 {
553 ERROR ("curl plugin: All statements failed.");
554 return (-1);
555 }
557 return (0);
558 } /* }}} int cc_config */
560 static int cc_init (void) /* {{{ */
561 {
562 if (pages_g == NULL)
563 {
564 INFO ("curl plugin: No pages have been defined.");
565 return (-1);
566 }
567 return (0);
568 } /* }}} int cc_init */
570 static void cc_submit (const web_page_t *wp, const web_match_t *wm, /* {{{ */
571 const cu_match_value_t *mv)
572 {
573 value_t values[1];
574 value_list_t vl = VALUE_LIST_INIT;
576 values[0] = mv->value;
578 vl.values = values;
579 vl.values_len = 1;
580 vl.time = time (NULL);
581 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
582 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
583 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
584 sstrncpy (vl.type, wm->type, sizeof (vl.type));
585 sstrncpy (vl.type_instance, wm->instance, sizeof (vl.type_instance));
587 plugin_dispatch_values (&vl);
588 } /* }}} void cc_submit */
590 static void cc_submit_response_time (const web_page_t *wp, double seconds) /* {{{ */
591 {
592 value_t values[1];
593 value_list_t vl = VALUE_LIST_INIT;
595 values[0].gauge = seconds;
597 vl.values = values;
598 vl.values_len = 1;
599 vl.time = time (NULL);
600 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
601 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
602 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
603 sstrncpy (vl.type, "response_time", sizeof (vl.type));
605 plugin_dispatch_values (&vl);
606 } /* }}} void cc_submit_response_time */
608 static int cc_read_page (web_page_t *wp) /* {{{ */
609 {
610 web_match_t *wm;
611 int status;
612 struct timeval start, end;
614 if (wp->response_time)
615 gettimeofday (&start, NULL);
617 wp->buffer_fill = 0;
618 status = curl_easy_perform (wp->curl);
619 if (status != 0)
620 {
621 ERROR ("curl plugin: curl_easy_perform failed with staus %i: %s",
622 status, wp->curl_errbuf);
623 return (-1);
624 }
626 if (wp->response_time)
627 {
628 double secs = 0;
629 gettimeofday (&end, NULL);
630 secs += end.tv_sec - start.tv_sec;
631 secs += (end.tv_usec - start.tv_usec) / 1000000.0;
632 cc_submit_response_time (wp, secs);
633 }
635 for (wm = wp->matches; wm != NULL; wm = wm->next)
636 {
637 cu_match_value_t *mv;
639 status = match_apply (wm->match, wp->buffer);
640 if (status != 0)
641 {
642 WARNING ("curl plugin: match_apply failed.");
643 continue;
644 }
646 mv = match_get_user_data (wm->match);
647 if (mv == NULL)
648 {
649 WARNING ("curl plugin: match_get_user_data returned NULL.");
650 continue;
651 }
653 cc_submit (wp, wm, mv);
654 } /* for (wm = wp->matches; wm != NULL; wm = wm->next) */
656 return (0);
657 } /* }}} int cc_read_page */
659 static int cc_read (void) /* {{{ */
660 {
661 web_page_t *wp;
663 for (wp = pages_g; wp != NULL; wp = wp->next)
664 cc_read_page (wp);
666 return (0);
667 } /* }}} int cc_read */
669 static int cc_shutdown (void) /* {{{ */
670 {
671 cc_web_page_free (pages_g);
672 pages_g = NULL;
674 return (0);
675 } /* }}} int cc_shutdown */
677 void module_register (void)
678 {
679 plugin_register_complex_config ("curl", cc_config);
680 plugin_register_init ("curl", cc_init);
681 plugin_register_read ("curl", cc_read);
682 plugin_register_shutdown ("curl", cc_shutdown);
683 } /* void module_register */
685 /* vim: set sw=2 sts=2 et fdm=marker : */