2 * collectd - src/curl.c
3 * Copyright (C) 2006-2009 Florian octo Forster
4 * Copyright (C) 2009 Aman Gupta
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.
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.
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
20 * Florian octo Forster <octo at collectd.org>
21 * Aman Gupta <aman at tmm1.net>
27 #include "configfile.h"
28 #include "utils_match.h"
29 #include "utils_time.h"
31 #include <curl/curl.h>
37 typedef struct web_match_s web_match_t;
38 struct web_match_s /* {{{ */
52 typedef struct web_page_s web_page_t;
53 struct web_page_s /* {{{ */
65 struct curl_slist *headers;
72 char curl_errbuf[CURL_ERROR_SIZE];
85 /* static CURLM *curl = NULL; */
86 static web_page_t *pages_g = NULL;
91 static size_t cc_curl_callback (void *buf, /* {{{ */
92 size_t size, size_t nmemb, void *user_data)
105 if ((wp->buffer_fill + len) >= wp->buffer_size)
110 temp_size = wp->buffer_fill + len + 1;
111 temp = (char *) realloc (wp->buffer, temp_size);
114 ERROR ("curl plugin: realloc failed.");
118 wp->buffer_size = temp_size;
121 memcpy (wp->buffer + wp->buffer_fill, (char *) buf, len);
122 wp->buffer_fill += len;
123 wp->buffer[wp->buffer_fill] = 0;
126 } /* }}} size_t cc_curl_callback */
128 static void cc_web_match_free (web_match_t *wm) /* {{{ */
135 sfree (wm->instance);
136 match_destroy (wm->match);
137 cc_web_match_free (wm->next);
139 } /* }}} void cc_web_match_free */
141 static void cc_web_page_free (web_page_t *wp) /* {{{ */
146 if (wp->curl != NULL)
147 curl_easy_cleanup (wp->curl);
150 sfree (wp->instance);
155 sfree (wp->credentials);
157 sfree (wp->post_body);
158 curl_slist_free_all (wp->headers);
162 cc_web_match_free (wp->matches);
163 cc_web_page_free (wp->next);
165 } /* }}} void cc_web_page_free */
167 static int cc_config_append_string (const char *name, struct curl_slist **dest, /* {{{ */
170 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
172 WARNING ("curl plugin: `%s' needs exactly one string argument.", name);
176 *dest = curl_slist_append(*dest, ci->values[0].value.string);
181 } /* }}} int cc_config_append_string */
183 static int cc_config_add_match_dstype (int *dstype_ret, /* {{{ */
188 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
190 WARNING ("curl plugin: `DSType' needs exactly one string argument.");
194 if (strncasecmp ("Gauge", ci->values[0].value.string,
195 strlen ("Gauge")) == 0)
197 dstype = UTILS_MATCH_DS_TYPE_GAUGE;
198 if (strcasecmp ("GaugeAverage", ci->values[0].value.string) == 0)
199 dstype |= UTILS_MATCH_CF_GAUGE_AVERAGE;
200 else if (strcasecmp ("GaugeMin", ci->values[0].value.string) == 0)
201 dstype |= UTILS_MATCH_CF_GAUGE_MIN;
202 else if (strcasecmp ("GaugeMax", ci->values[0].value.string) == 0)
203 dstype |= UTILS_MATCH_CF_GAUGE_MAX;
204 else if (strcasecmp ("GaugeLast", ci->values[0].value.string) == 0)
205 dstype |= UTILS_MATCH_CF_GAUGE_LAST;
209 else if (strncasecmp ("Counter", ci->values[0].value.string,
210 strlen ("Counter")) == 0)
212 dstype = UTILS_MATCH_DS_TYPE_COUNTER;
213 if (strcasecmp ("CounterSet", ci->values[0].value.string) == 0)
214 dstype |= UTILS_MATCH_CF_COUNTER_SET;
215 else if (strcasecmp ("CounterAdd", ci->values[0].value.string) == 0)
216 dstype |= UTILS_MATCH_CF_COUNTER_ADD;
217 else if (strcasecmp ("CounterInc", ci->values[0].value.string) == 0)
218 dstype |= UTILS_MATCH_CF_COUNTER_INC;
222 else if (strncasecmp ("Derive", ci->values[0].value.string,
223 strlen ("Derive")) == 0)
225 dstype = UTILS_MATCH_DS_TYPE_DERIVE;
226 if (strcasecmp ("DeriveSet", ci->values[0].value.string) == 0)
227 dstype |= UTILS_MATCH_CF_DERIVE_SET;
228 else if (strcasecmp ("DeriveAdd", ci->values[0].value.string) == 0)
229 dstype |= UTILS_MATCH_CF_DERIVE_ADD;
230 else if (strcasecmp ("DeriveInc", ci->values[0].value.string) == 0)
231 dstype |= UTILS_MATCH_CF_DERIVE_INC;
235 else if (strncasecmp ("Absolute", ci->values[0].value.string,
236 strlen ("Absolute")) == 0)
238 dstype = UTILS_MATCH_DS_TYPE_ABSOLUTE;
239 if (strcasecmp ("AbsoluteSet", ci->values[0].value.string) == 0) /* Absolute DS is reset-on-read so no sense doin anything else but set */
240 dstype |= UTILS_MATCH_CF_ABSOLUTE_SET;
252 WARNING ("curl plugin: `%s' is not a valid argument to `DSType'.",
253 ci->values[0].value.string);
257 *dstype_ret = dstype;
259 } /* }}} int cc_config_add_match_dstype */
261 static int cc_config_add_match (web_page_t *page, /* {{{ */
268 if (ci->values_num != 0)
270 WARNING ("curl plugin: Ignoring arguments for the `Match' block.");
273 match = (web_match_t *) malloc (sizeof (*match));
276 ERROR ("curl plugin: malloc failed.");
279 memset (match, 0, sizeof (*match));
282 for (i = 0; i < ci->children_num; i++)
284 oconfig_item_t *child = ci->children + i;
286 if (strcasecmp ("Regex", child->key) == 0)
287 status = cf_util_get_string (child, &match->regex);
288 else if (strcasecmp ("ExcludeRegex", child->key) == 0)
289 status = cf_util_get_string (child, &match->exclude_regex);
290 else if (strcasecmp ("DSType", child->key) == 0)
291 status = cc_config_add_match_dstype (&match->dstype, child);
292 else if (strcasecmp ("Type", child->key) == 0)
293 status = cf_util_get_string (child, &match->type);
294 else if (strcasecmp ("Instance", child->key) == 0)
295 status = cf_util_get_string (child, &match->instance);
298 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
304 } /* for (i = 0; i < ci->children_num; i++) */
308 if (match->regex == NULL)
310 WARNING ("curl plugin: `Regex' missing in `Match' block.");
314 if (match->type == NULL)
316 WARNING ("curl plugin: `Type' missing in `Match' block.");
320 if (match->dstype == 0)
322 WARNING ("curl plugin: `DSType' missing in `Match' block.");
327 } /* while (status == 0) */
332 match->match = match_create_simple (match->regex, match->exclude_regex,
334 if (match->match == NULL)
336 ERROR ("curl plugin: tail_match_add_match_simple failed.");
337 cc_web_match_free (match);
344 prev = page->matches;
345 while ((prev != NULL) && (prev->next != NULL))
349 page->matches = match;
355 } /* }}} int cc_config_add_match */
357 static int cc_page_init_curl (web_page_t *wp) /* {{{ */
359 wp->curl = curl_easy_init ();
360 if (wp->curl == NULL)
362 ERROR ("curl plugin: curl_easy_init failed.");
366 curl_easy_setopt (wp->curl, CURLOPT_NOSIGNAL, 1L);
367 curl_easy_setopt (wp->curl, CURLOPT_WRITEFUNCTION, cc_curl_callback);
368 curl_easy_setopt (wp->curl, CURLOPT_WRITEDATA, wp);
369 curl_easy_setopt (wp->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
370 curl_easy_setopt (wp->curl, CURLOPT_ERRORBUFFER, wp->curl_errbuf);
371 curl_easy_setopt (wp->curl, CURLOPT_URL, wp->url);
372 curl_easy_setopt (wp->curl, CURLOPT_FOLLOWLOCATION, 1L);
373 curl_easy_setopt (wp->curl, CURLOPT_MAXREDIRS, 50L);
375 if (wp->user != NULL)
377 #ifdef HAVE_CURLOPT_USERNAME
378 curl_easy_setopt (wp->curl, CURLOPT_USERNAME, wp->user);
379 curl_easy_setopt (wp->curl, CURLOPT_PASSWORD,
380 (wp->pass == NULL) ? "" : wp->pass);
382 size_t credentials_size;
384 credentials_size = strlen (wp->user) + 2;
385 if (wp->pass != NULL)
386 credentials_size += strlen (wp->pass);
388 wp->credentials = (char *) malloc (credentials_size);
389 if (wp->credentials == NULL)
391 ERROR ("curl plugin: malloc failed.");
395 ssnprintf (wp->credentials, credentials_size, "%s:%s",
396 wp->user, (wp->pass == NULL) ? "" : wp->pass);
397 curl_easy_setopt (wp->curl, CURLOPT_USERPWD, wp->credentials);
401 curl_easy_setopt (wp->curl, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
404 curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYPEER, (long) wp->verify_peer);
405 curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYHOST,
406 wp->verify_host ? 2L : 0L);
407 if (wp->cacert != NULL)
408 curl_easy_setopt (wp->curl, CURLOPT_CAINFO, wp->cacert);
409 if (wp->headers != NULL)
410 curl_easy_setopt (wp->curl, CURLOPT_HTTPHEADER, wp->headers);
411 if (wp->post_body != NULL)
412 curl_easy_setopt (wp->curl, CURLOPT_POSTFIELDS, wp->post_body);
414 #ifdef HAVE_CURLOPT_TIMEOUT_MS
415 if (wp->timeout >= 0)
416 curl_easy_setopt (wp->curl, CURLOPT_TIMEOUT_MS, (long) wp->timeout);
418 curl_easy_setopt (wp->curl, CURLOPT_TIMEOUT_MS,
419 CDTIME_T_TO_MS(plugin_get_interval()));
423 } /* }}} int cc_page_init_curl */
425 static int cc_config_add_page (oconfig_item_t *ci) /* {{{ */
431 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
433 WARNING ("curl plugin: `Page' blocks need exactly one string argument.");
437 page = (web_page_t *) malloc (sizeof (*page));
440 ERROR ("curl plugin: malloc failed.");
443 memset (page, 0, sizeof (*page));
448 page->verify_peer = 1;
449 page->verify_host = 1;
450 page->response_time = 0;
451 page->response_code = 0;
454 page->instance = strdup (ci->values[0].value.string);
455 if (page->instance == NULL)
457 ERROR ("curl plugin: strdup failed.");
462 /* Process all children */
464 for (i = 0; i < ci->children_num; i++)
466 oconfig_item_t *child = ci->children + i;
468 if (strcasecmp ("URL", child->key) == 0)
469 status = cf_util_get_string (child, &page->url);
470 else if (strcasecmp ("User", child->key) == 0)
471 status = cf_util_get_string (child, &page->user);
472 else if (strcasecmp ("Password", child->key) == 0)
473 status = cf_util_get_string (child, &page->pass);
474 else if (strcasecmp ("Digest", child->key) == 0)
475 status = cf_util_get_boolean (child, &page->digest);
476 else if (strcasecmp ("VerifyPeer", child->key) == 0)
477 status = cf_util_get_boolean (child, &page->verify_peer);
478 else if (strcasecmp ("VerifyHost", child->key) == 0)
479 status = cf_util_get_boolean (child, &page->verify_host);
480 else if (strcasecmp ("MeasureResponseTime", child->key) == 0)
481 status = cf_util_get_boolean (child, &page->response_time);
482 else if (strcasecmp ("MeasureResponseCode", child->key) == 0)
483 status = cf_util_get_boolean (child, &page->response_code);
484 else if (strcasecmp ("CACert", child->key) == 0)
485 status = cf_util_get_string (child, &page->cacert);
486 else if (strcasecmp ("Match", child->key) == 0)
487 /* Be liberal with failing matches => don't set `status'. */
488 cc_config_add_match (page, child);
489 else if (strcasecmp ("Header", child->key) == 0)
490 status = cc_config_append_string ("Header", &page->headers, child);
491 else if (strcasecmp ("Post", child->key) == 0)
492 status = cf_util_get_string (child, &page->post_body);
493 else if (strcasecmp ("Timeout", child->key) == 0)
494 status = cf_util_get_int (child, &page->timeout);
497 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
503 } /* for (i = 0; i < ci->children_num; i++) */
505 /* Additionial sanity checks and libCURL initialization. */
508 if (page->url == NULL)
510 WARNING ("curl plugin: `URL' missing in `Page' block.");
514 if (page->matches == NULL && !page->response_time && !page->response_code)
516 assert (page->instance != NULL);
517 WARNING ("curl plugin: No (valid) `Match' block "
518 "or MeasureResponseTime or MeasureResponseCode within "
519 "`Page' block `%s'.", page->instance);
524 status = cc_page_init_curl (page);
527 } /* while (status == 0) */
531 cc_web_page_free (page);
535 /* Add the new page to the linked list */
543 while ((prev != NULL) && (prev->next != NULL))
549 } /* }}} int cc_config_add_page */
551 static int cc_config (oconfig_item_t *ci) /* {{{ */
561 for (i = 0; i < ci->children_num; i++)
563 oconfig_item_t *child = ci->children + i;
565 if (strcasecmp ("Page", child->key) == 0)
567 status = cc_config_add_page (child);
575 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
580 if ((success == 0) && (errors > 0))
582 ERROR ("curl plugin: All statements failed.");
587 } /* }}} int cc_config */
589 static int cc_init (void) /* {{{ */
593 INFO ("curl plugin: No pages have been defined.");
596 curl_global_init (CURL_GLOBAL_SSL);
598 } /* }}} int cc_init */
600 static void cc_submit (const web_page_t *wp, const web_match_t *wm, /* {{{ */
601 const cu_match_value_t *mv)
604 value_list_t vl = VALUE_LIST_INIT;
606 values[0] = mv->value;
610 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
611 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
612 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
613 sstrncpy (vl.type, wm->type, sizeof (vl.type));
614 if (wm->instance != NULL)
615 sstrncpy (vl.type_instance, wm->instance, sizeof (vl.type_instance));
617 plugin_dispatch_values (&vl);
618 } /* }}} void cc_submit */
620 static void cc_submit_response_code (const web_page_t *wp, long code) /* {{{ */
623 value_list_t vl = VALUE_LIST_INIT;
625 values[0].gauge = code;
629 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
630 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
631 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
632 sstrncpy (vl.type, "response_code", sizeof (vl.type));
634 plugin_dispatch_values (&vl);
635 } /* }}} void cc_submit_response_code */
637 static void cc_submit_response_time (const web_page_t *wp, /* {{{ */
638 cdtime_t response_time)
641 value_list_t vl = VALUE_LIST_INIT;
643 values[0].gauge = CDTIME_T_TO_DOUBLE (response_time);
647 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
648 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
649 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
650 sstrncpy (vl.type, "response_time", sizeof (vl.type));
652 plugin_dispatch_values (&vl);
653 } /* }}} void cc_submit_response_time */
655 static int cc_read_page (web_page_t *wp) /* {{{ */
661 if (wp->response_time)
665 status = curl_easy_perform (wp->curl);
666 if (status != CURLE_OK)
668 ERROR ("curl plugin: curl_easy_perform failed with status %i: %s",
669 status, wp->curl_errbuf);
673 if (wp->response_time)
674 cc_submit_response_time (wp, cdtime() - start);
676 if(wp->response_code)
678 long response_code = 0;
679 status = curl_easy_getinfo(wp->curl, CURLINFO_RESPONSE_CODE, &response_code);
680 if(status != CURLE_OK) {
681 ERROR ("curl plugin: Fetching response code failed with status %i: %s",
682 status, wp->curl_errbuf);
684 cc_submit_response_code(wp, response_code);
688 for (wm = wp->matches; wm != NULL; wm = wm->next)
690 cu_match_value_t *mv;
692 status = match_apply (wm->match, wp->buffer);
695 WARNING ("curl plugin: match_apply failed.");
699 mv = match_get_user_data (wm->match);
702 WARNING ("curl plugin: match_get_user_data returned NULL.");
706 cc_submit (wp, wm, mv);
707 match_value_reset (mv);
708 } /* for (wm = wp->matches; wm != NULL; wm = wm->next) */
711 } /* }}} int cc_read_page */
713 static int cc_read (void) /* {{{ */
717 for (wp = pages_g; wp != NULL; wp = wp->next)
721 } /* }}} int cc_read */
723 static int cc_shutdown (void) /* {{{ */
725 cc_web_page_free (pages_g);
729 } /* }}} int cc_shutdown */
731 void module_register (void)
733 plugin_register_complex_config ("curl", cc_config);
734 plugin_register_init ("curl", cc_init);
735 plugin_register_read ("curl", cc_read);
736 plugin_register_shutdown ("curl", cc_shutdown);
737 } /* void module_register */
739 /* vim: set sw=2 sts=2 et fdm=marker : */