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;
71 char curl_errbuf[CURL_ERROR_SIZE];
84 /* static CURLM *curl = NULL; */
85 static web_page_t *pages_g = NULL;
90 static size_t cc_curl_callback (void *buf, /* {{{ */
91 size_t size, size_t nmemb, void *user_data)
104 if ((wp->buffer_fill + len) >= wp->buffer_size)
109 temp_size = wp->buffer_fill + len + 1;
110 temp = (char *) realloc (wp->buffer, temp_size);
113 ERROR ("curl plugin: realloc failed.");
117 wp->buffer_size = temp_size;
120 memcpy (wp->buffer + wp->buffer_fill, (char *) buf, len);
121 wp->buffer_fill += len;
122 wp->buffer[wp->buffer_fill] = 0;
125 } /* }}} size_t cc_curl_callback */
127 static void cc_web_match_free (web_match_t *wm) /* {{{ */
134 sfree (wm->instance);
135 match_destroy (wm->match);
136 cc_web_match_free (wm->next);
138 } /* }}} void cc_web_match_free */
140 static void cc_web_page_free (web_page_t *wp) /* {{{ */
145 if (wp->curl != NULL)
146 curl_easy_cleanup (wp->curl);
149 sfree (wp->instance);
154 sfree (wp->credentials);
156 sfree (wp->post_body);
157 curl_slist_free_all (wp->headers);
161 cc_web_match_free (wp->matches);
162 cc_web_page_free (wp->next);
164 } /* }}} void cc_web_page_free */
166 static int cc_config_append_string (const char *name, struct curl_slist **dest, /* {{{ */
169 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
171 WARNING ("curl plugin: `%s' needs exactly one string argument.", name);
175 *dest = curl_slist_append(*dest, ci->values[0].value.string);
180 } /* }}} int cc_config_append_string */
182 static int cc_config_add_match_dstype (int *dstype_ret, /* {{{ */
187 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
189 WARNING ("curl plugin: `DSType' needs exactly one string argument.");
193 if (strncasecmp ("Gauge", ci->values[0].value.string,
194 strlen ("Gauge")) == 0)
196 dstype = UTILS_MATCH_DS_TYPE_GAUGE;
197 if (strcasecmp ("GaugeAverage", ci->values[0].value.string) == 0)
198 dstype |= UTILS_MATCH_CF_GAUGE_AVERAGE;
199 else if (strcasecmp ("GaugeMin", ci->values[0].value.string) == 0)
200 dstype |= UTILS_MATCH_CF_GAUGE_MIN;
201 else if (strcasecmp ("GaugeMax", ci->values[0].value.string) == 0)
202 dstype |= UTILS_MATCH_CF_GAUGE_MAX;
203 else if (strcasecmp ("GaugeLast", ci->values[0].value.string) == 0)
204 dstype |= UTILS_MATCH_CF_GAUGE_LAST;
208 else if (strncasecmp ("Counter", ci->values[0].value.string,
209 strlen ("Counter")) == 0)
211 dstype = UTILS_MATCH_DS_TYPE_COUNTER;
212 if (strcasecmp ("CounterSet", ci->values[0].value.string) == 0)
213 dstype |= UTILS_MATCH_CF_COUNTER_SET;
214 else if (strcasecmp ("CounterAdd", ci->values[0].value.string) == 0)
215 dstype |= UTILS_MATCH_CF_COUNTER_ADD;
216 else if (strcasecmp ("CounterInc", ci->values[0].value.string) == 0)
217 dstype |= UTILS_MATCH_CF_COUNTER_INC;
221 else if (strncasecmp ("Derive", ci->values[0].value.string,
222 strlen ("Derive")) == 0)
224 dstype = UTILS_MATCH_DS_TYPE_DERIVE;
225 if (strcasecmp ("DeriveSet", ci->values[0].value.string) == 0)
226 dstype |= UTILS_MATCH_CF_DERIVE_SET;
227 else if (strcasecmp ("DeriveAdd", ci->values[0].value.string) == 0)
228 dstype |= UTILS_MATCH_CF_DERIVE_ADD;
229 else if (strcasecmp ("DeriveInc", ci->values[0].value.string) == 0)
230 dstype |= UTILS_MATCH_CF_DERIVE_INC;
234 else if (strncasecmp ("Absolute", ci->values[0].value.string,
235 strlen ("Absolute")) == 0)
237 dstype = UTILS_MATCH_DS_TYPE_ABSOLUTE;
238 if (strcasecmp ("AbsoluteSet", ci->values[0].value.string) == 0) /* Absolute DS is reset-on-read so no sense doin anything else but set */
239 dstype |= UTILS_MATCH_CF_ABSOLUTE_SET;
251 WARNING ("curl plugin: `%s' is not a valid argument to `DSType'.",
252 ci->values[0].value.string);
256 *dstype_ret = dstype;
258 } /* }}} int cc_config_add_match_dstype */
260 static int cc_config_add_match (web_page_t *page, /* {{{ */
267 if (ci->values_num != 0)
269 WARNING ("curl plugin: Ignoring arguments for the `Match' block.");
272 match = (web_match_t *) malloc (sizeof (*match));
275 ERROR ("curl plugin: malloc failed.");
278 memset (match, 0, sizeof (*match));
281 for (i = 0; i < ci->children_num; i++)
283 oconfig_item_t *child = ci->children + i;
285 if (strcasecmp ("Regex", child->key) == 0)
286 status = cf_util_get_string (child, &match->regex);
287 else if (strcasecmp ("ExcludeRegex", child->key) == 0)
288 status = cf_util_get_string (child, &match->exclude_regex);
289 else if (strcasecmp ("DSType", child->key) == 0)
290 status = cc_config_add_match_dstype (&match->dstype, child);
291 else if (strcasecmp ("Type", child->key) == 0)
292 status = cf_util_get_string (child, &match->type);
293 else if (strcasecmp ("Instance", child->key) == 0)
294 status = cf_util_get_string (child, &match->instance);
297 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
303 } /* for (i = 0; i < ci->children_num; i++) */
307 if (match->regex == NULL)
309 WARNING ("curl plugin: `Regex' missing in `Match' block.");
313 if (match->type == NULL)
315 WARNING ("curl plugin: `Type' missing in `Match' block.");
319 if (match->dstype == 0)
321 WARNING ("curl plugin: `DSType' missing in `Match' block.");
326 } /* while (status == 0) */
331 match->match = match_create_simple (match->regex, match->exclude_regex,
333 if (match->match == NULL)
335 ERROR ("curl plugin: tail_match_add_match_simple failed.");
336 cc_web_match_free (match);
343 prev = page->matches;
344 while ((prev != NULL) && (prev->next != NULL))
348 page->matches = match;
354 } /* }}} int cc_config_add_match */
356 static int cc_page_init_curl (web_page_t *wp) /* {{{ */
358 wp->curl = curl_easy_init ();
359 if (wp->curl == NULL)
361 ERROR ("curl plugin: curl_easy_init failed.");
365 curl_easy_setopt (wp->curl, CURLOPT_NOSIGNAL, 1L);
366 curl_easy_setopt (wp->curl, CURLOPT_WRITEFUNCTION, cc_curl_callback);
367 curl_easy_setopt (wp->curl, CURLOPT_WRITEDATA, wp);
368 curl_easy_setopt (wp->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
369 curl_easy_setopt (wp->curl, CURLOPT_ERRORBUFFER, wp->curl_errbuf);
370 curl_easy_setopt (wp->curl, CURLOPT_URL, wp->url);
371 curl_easy_setopt (wp->curl, CURLOPT_FOLLOWLOCATION, 1L);
372 curl_easy_setopt (wp->curl, CURLOPT_MAXREDIRS, 50L);
374 if (wp->user != NULL)
376 size_t credentials_size;
378 credentials_size = strlen (wp->user) + 2;
379 if (wp->pass != NULL)
380 credentials_size += strlen (wp->pass);
382 wp->credentials = (char *) malloc (credentials_size);
383 if (wp->credentials == NULL)
385 ERROR ("curl plugin: malloc failed.");
389 ssnprintf (wp->credentials, credentials_size, "%s:%s",
390 wp->user, (wp->pass == NULL) ? "" : wp->pass);
391 curl_easy_setopt (wp->curl, CURLOPT_USERPWD, wp->credentials);
395 curl_easy_setopt (wp->curl, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
396 curl_easy_setopt (wp->curl, CURLOPT_USERNAME, wp->user);
397 curl_easy_setopt (wp->curl, CURLOPT_PASSWORD, wp->pass);
401 curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYPEER, (long) wp->verify_peer);
402 curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYHOST,
403 wp->verify_host ? 2L : 0L);
404 if (wp->cacert != NULL)
405 curl_easy_setopt (wp->curl, CURLOPT_CAINFO, wp->cacert);
406 if (wp->headers != NULL)
407 curl_easy_setopt (wp->curl, CURLOPT_HTTPHEADER, wp->headers);
408 if (wp->post_body != NULL)
409 curl_easy_setopt (wp->curl, CURLOPT_POSTFIELDS, wp->post_body);
412 } /* }}} int cc_page_init_curl */
414 static int cc_config_add_page (oconfig_item_t *ci) /* {{{ */
420 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
422 WARNING ("curl plugin: `Page' blocks need exactly one string argument.");
426 page = (web_page_t *) malloc (sizeof (*page));
429 ERROR ("curl plugin: malloc failed.");
432 memset (page, 0, sizeof (*page));
437 page->verify_peer = 1;
438 page->verify_host = 1;
439 page->response_time = 0;
440 page->response_code = 0;
442 page->instance = strdup (ci->values[0].value.string);
443 if (page->instance == NULL)
445 ERROR ("curl plugin: strdup failed.");
450 /* Process all children */
452 for (i = 0; i < ci->children_num; i++)
454 oconfig_item_t *child = ci->children + i;
456 if (strcasecmp ("URL", child->key) == 0)
457 status = cf_util_get_string (child, &page->url);
458 else if (strcasecmp ("User", child->key) == 0)
459 status = cf_util_get_string (child, &page->user);
460 else if (strcasecmp ("Password", child->key) == 0)
461 status = cf_util_get_string (child, &page->pass);
462 else if (strcasecmp ("Digest", child->key) == 0)
463 status = cf_util_get_boolean (child, &page->digest);
464 else if (strcasecmp ("VerifyPeer", child->key) == 0)
465 status = cf_util_get_boolean (child, &page->verify_peer);
466 else if (strcasecmp ("VerifyHost", child->key) == 0)
467 status = cf_util_get_boolean (child, &page->verify_host);
468 else if (strcasecmp ("MeasureResponseTime", child->key) == 0)
469 status = cf_util_get_boolean (child, &page->response_time);
470 else if (strcasecmp ("MeasureResponseCode", child->key) == 0)
471 status = cf_util_get_boolean (child, &page->response_code);
472 else if (strcasecmp ("CACert", child->key) == 0)
473 status = cf_util_get_string (child, &page->cacert);
474 else if (strcasecmp ("Match", child->key) == 0)
475 /* Be liberal with failing matches => don't set `status'. */
476 cc_config_add_match (page, child);
477 else if (strcasecmp ("Header", child->key) == 0)
478 status = cc_config_append_string ("Header", &page->headers, child);
479 else if (strcasecmp ("Post", child->key) == 0)
480 status = cf_util_get_string (child, &page->post_body);
483 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
489 } /* for (i = 0; i < ci->children_num; i++) */
491 /* Additionial sanity checks and libCURL initialization. */
494 if (page->url == NULL)
496 WARNING ("curl plugin: `URL' missing in `Page' block.");
500 if (page->matches == NULL && !page->response_time && !page->response_code)
502 assert (page->instance != NULL);
503 WARNING ("curl plugin: No (valid) `Match' block "
504 "or MeasureResponseTime or MeasureResponseCode within "
505 "`Page' block `%s'.", page->instance);
510 status = cc_page_init_curl (page);
513 } /* while (status == 0) */
517 cc_web_page_free (page);
521 /* Add the new page to the linked list */
529 while ((prev != NULL) && (prev->next != NULL))
535 } /* }}} int cc_config_add_page */
537 static int cc_config (oconfig_item_t *ci) /* {{{ */
547 for (i = 0; i < ci->children_num; i++)
549 oconfig_item_t *child = ci->children + i;
551 if (strcasecmp ("Page", child->key) == 0)
553 status = cc_config_add_page (child);
561 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
566 if ((success == 0) && (errors > 0))
568 ERROR ("curl plugin: All statements failed.");
573 } /* }}} int cc_config */
575 static int cc_init (void) /* {{{ */
579 INFO ("curl plugin: No pages have been defined.");
583 } /* }}} int cc_init */
585 static void cc_submit (const web_page_t *wp, const web_match_t *wm, /* {{{ */
586 const cu_match_value_t *mv)
589 value_list_t vl = VALUE_LIST_INIT;
591 values[0] = mv->value;
595 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
596 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
597 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
598 sstrncpy (vl.type, wm->type, sizeof (vl.type));
599 if (wm->instance != NULL)
600 sstrncpy (vl.type_instance, wm->instance, sizeof (vl.type_instance));
602 plugin_dispatch_values (&vl);
603 } /* }}} void cc_submit */
605 static void cc_submit_response_code (const web_page_t *wp, long code) /* {{{ */
608 value_list_t vl = VALUE_LIST_INIT;
610 values[0].gauge = code;
614 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
615 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
616 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
617 sstrncpy (vl.type, "response_code", sizeof (vl.type));
619 plugin_dispatch_values (&vl);
620 } /* }}} void cc_submit_response_code */
622 static void cc_submit_response_time (const web_page_t *wp, /* {{{ */
623 cdtime_t response_time)
626 value_list_t vl = VALUE_LIST_INIT;
628 values[0].gauge = CDTIME_T_TO_DOUBLE (response_time);
632 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
633 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
634 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
635 sstrncpy (vl.type, "response_time", sizeof (vl.type));
637 plugin_dispatch_values (&vl);
638 } /* }}} void cc_submit_response_time */
640 static int cc_read_page (web_page_t *wp) /* {{{ */
646 if (wp->response_time)
650 status = curl_easy_perform (wp->curl);
651 if (status != CURLE_OK)
653 ERROR ("curl plugin: curl_easy_perform failed with staus %i: %s",
654 status, wp->curl_errbuf);
658 if (wp->response_time)
659 cc_submit_response_time (wp, cdtime() - start);
661 if(wp->response_code)
663 long response_code = 0;
664 status = curl_easy_getinfo(wp->curl, CURLINFO_RESPONSE_CODE, &response_code);
665 if(status != CURLE_OK) {
666 ERROR ("curl plugin: Fetching response code failed with staus %i: %s",
667 status, wp->curl_errbuf);
669 cc_submit_response_code(wp, response_code);
673 for (wm = wp->matches; wm != NULL; wm = wm->next)
675 cu_match_value_t *mv;
677 status = match_apply (wm->match, wp->buffer);
680 WARNING ("curl plugin: match_apply failed.");
684 mv = match_get_user_data (wm->match);
687 WARNING ("curl plugin: match_get_user_data returned NULL.");
691 cc_submit (wp, wm, mv);
692 } /* for (wm = wp->matches; wm != NULL; wm = wm->next) */
695 } /* }}} int cc_read_page */
697 static int cc_read (void) /* {{{ */
701 for (wp = pages_g; wp != NULL; wp = wp->next)
705 } /* }}} int cc_read */
707 static int cc_shutdown (void) /* {{{ */
709 cc_web_page_free (pages_g);
713 } /* }}} int cc_shutdown */
715 void module_register (void)
717 plugin_register_complex_config ("curl", cc_config);
718 plugin_register_init ("curl", cc_init);
719 plugin_register_read ("curl", cc_read);
720 plugin_register_shutdown ("curl", cc_shutdown);
721 } /* void module_register */
723 /* vim: set sw=2 sts=2 et fdm=marker : */