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 verplant.org>
21 * Aman Gupta <aman at tmm1.net>
27 #include "configfile.h"
28 #include "utils_match.h"
30 #include <curl/curl.h>
36 typedef struct web_match_s web_match_t;
37 struct web_match_s /* {{{ */
51 typedef struct web_page_s web_page_t;
52 struct web_page_s /* {{{ */
63 struct curl_slist *headers;
68 char curl_errbuf[CURL_ERROR_SIZE];
81 /* static CURLM *curl = NULL; */
82 static web_page_t *pages_g = NULL;
87 static size_t cc_curl_callback (void *buf, /* {{{ */
88 size_t size, size_t nmemb, void *user_data)
101 if ((wp->buffer_fill + len) >= wp->buffer_size)
106 temp_size = wp->buffer_fill + len + 1;
107 temp = (char *) realloc (wp->buffer, temp_size);
110 ERROR ("curl plugin: realloc failed.");
114 wp->buffer_size = temp_size;
117 memcpy (wp->buffer + wp->buffer_fill, (char *) buf, len);
118 wp->buffer_fill += len;
119 wp->buffer[wp->buffer_fill] = 0;
122 } /* }}} size_t cc_curl_callback */
124 static void cc_web_match_free (web_match_t *wm) /* {{{ */
131 sfree (wm->instance);
132 match_destroy (wm->match);
133 cc_web_match_free (wm->next);
135 } /* }}} void cc_web_match_free */
137 static void cc_web_page_free (web_page_t *wp) /* {{{ */
142 if (wp->curl != NULL)
143 curl_easy_cleanup (wp->curl);
146 sfree (wp->instance);
151 sfree (wp->credentials);
153 sfree (wp->post_body);
154 curl_slist_free_all (wp->headers);
158 cc_web_match_free (wp->matches);
159 cc_web_page_free (wp->next);
161 } /* }}} void cc_web_page_free */
163 static int cc_config_append_string (const char *name, struct curl_slist **dest, /* {{{ */
166 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
168 WARNING ("curl plugin: `%s' needs exactly one string argument.", name);
172 *dest = curl_slist_append(*dest, ci->values[0].value.string);
177 } /* }}} int cc_config_append_string */
179 static int cc_config_add_match_dstype (int *dstype_ret, /* {{{ */
184 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
186 WARNING ("curl plugin: `DSType' needs exactly one string argument.");
190 if (strncasecmp ("Gauge", ci->values[0].value.string,
191 strlen ("Gauge")) == 0)
193 dstype = UTILS_MATCH_DS_TYPE_GAUGE;
194 if (strcasecmp ("GaugeAverage", ci->values[0].value.string) == 0)
195 dstype |= UTILS_MATCH_CF_GAUGE_AVERAGE;
196 else if (strcasecmp ("GaugeMin", ci->values[0].value.string) == 0)
197 dstype |= UTILS_MATCH_CF_GAUGE_MIN;
198 else if (strcasecmp ("GaugeMax", ci->values[0].value.string) == 0)
199 dstype |= UTILS_MATCH_CF_GAUGE_MAX;
200 else if (strcasecmp ("GaugeLast", ci->values[0].value.string) == 0)
201 dstype |= UTILS_MATCH_CF_GAUGE_LAST;
205 else if (strncasecmp ("Counter", ci->values[0].value.string,
206 strlen ("Counter")) == 0)
208 dstype = UTILS_MATCH_DS_TYPE_COUNTER;
209 if (strcasecmp ("CounterSet", ci->values[0].value.string) == 0)
210 dstype |= UTILS_MATCH_CF_COUNTER_SET;
211 else if (strcasecmp ("CounterAdd", ci->values[0].value.string) == 0)
212 dstype |= UTILS_MATCH_CF_COUNTER_ADD;
213 else if (strcasecmp ("CounterInc", ci->values[0].value.string) == 0)
214 dstype |= UTILS_MATCH_CF_COUNTER_INC;
218 else if (strncasecmp ("Derive", ci->values[0].value.string,
219 strlen ("Derive")) == 0)
221 dstype = UTILS_MATCH_DS_TYPE_DERIVE;
222 if (strcasecmp ("DeriveSet", ci->values[0].value.string) == 0)
223 dstype |= UTILS_MATCH_CF_DERIVE_SET;
224 else if (strcasecmp ("DeriveAdd", ci->values[0].value.string) == 0)
225 dstype |= UTILS_MATCH_CF_DERIVE_ADD;
226 else if (strcasecmp ("DeriveInc", ci->values[0].value.string) == 0)
227 dstype |= UTILS_MATCH_CF_DERIVE_INC;
231 else if (strncasecmp ("Absolute", ci->values[0].value.string,
232 strlen ("Absolute")) == 0)
234 dstype = UTILS_MATCH_DS_TYPE_ABSOLUTE;
235 if (strcasecmp ("AbsoluteSet", ci->values[0].value.string) == 0) /* Absolute DS is reset-on-read so no sense doin anything else but set */
236 dstype |= UTILS_MATCH_CF_ABSOLUTE_SET;
248 WARNING ("curl plugin: `%s' is not a valid argument to `DSType'.",
249 ci->values[0].value.string);
253 *dstype_ret = dstype;
255 } /* }}} int cc_config_add_match_dstype */
257 static int cc_config_add_match (web_page_t *page, /* {{{ */
264 if (ci->values_num != 0)
266 WARNING ("curl plugin: Ignoring arguments for the `Match' block.");
269 match = (web_match_t *) malloc (sizeof (*match));
272 ERROR ("curl plugin: malloc failed.");
275 memset (match, 0, sizeof (*match));
278 for (i = 0; i < ci->children_num; i++)
280 oconfig_item_t *child = ci->children + i;
282 if (strcasecmp ("Regex", child->key) == 0)
283 status = cf_util_get_string (child, &match->regex);
284 else if (strcasecmp ("ExcludeRegex", child->key) == 0)
285 status = cf_util_get_string (child, &match->exclude_regex);
286 else if (strcasecmp ("DSType", child->key) == 0)
287 status = cc_config_add_match_dstype (&match->dstype, child);
288 else if (strcasecmp ("Type", child->key) == 0)
289 status = cf_util_get_string (child, &match->type);
290 else if (strcasecmp ("Instance", child->key) == 0)
291 status = cf_util_get_string (child, &match->instance);
294 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
300 } /* for (i = 0; i < ci->children_num; i++) */
304 if (match->regex == NULL)
306 WARNING ("curl plugin: `Regex' missing in `Match' block.");
310 if (match->type == NULL)
312 WARNING ("curl plugin: `Type' missing in `Match' block.");
316 if (match->dstype == 0)
318 WARNING ("curl plugin: `DSType' missing in `Match' block.");
323 } /* while (status == 0) */
328 match->match = match_create_simple (match->regex, match->exclude_regex,
330 if (match->match == NULL)
332 ERROR ("curl plugin: tail_match_add_match_simple failed.");
333 cc_web_match_free (match);
340 prev = page->matches;
341 while ((prev != NULL) && (prev->next != NULL))
345 page->matches = match;
351 } /* }}} int cc_config_add_match */
353 static int cc_page_init_curl (web_page_t *wp) /* {{{ */
355 wp->curl = curl_easy_init ();
356 if (wp->curl == NULL)
358 ERROR ("curl plugin: curl_easy_init failed.");
362 curl_easy_setopt (wp->curl, CURLOPT_NOSIGNAL, 1L);
363 curl_easy_setopt (wp->curl, CURLOPT_WRITEFUNCTION, cc_curl_callback);
364 curl_easy_setopt (wp->curl, CURLOPT_WRITEDATA, wp);
365 curl_easy_setopt (wp->curl, CURLOPT_USERAGENT,
366 PACKAGE_NAME"/"PACKAGE_VERSION);
367 curl_easy_setopt (wp->curl, CURLOPT_ERRORBUFFER, wp->curl_errbuf);
368 curl_easy_setopt (wp->curl, CURLOPT_URL, wp->url);
369 curl_easy_setopt (wp->curl, CURLOPT_FOLLOWLOCATION, 1L);
370 curl_easy_setopt (wp->curl, CURLOPT_MAXREDIRS, 50L);
372 if (wp->user != NULL)
374 size_t credentials_size;
376 credentials_size = strlen (wp->user) + 2;
377 if (wp->pass != NULL)
378 credentials_size += strlen (wp->pass);
380 wp->credentials = (char *) malloc (credentials_size);
381 if (wp->credentials == NULL)
383 ERROR ("curl plugin: malloc failed.");
387 ssnprintf (wp->credentials, credentials_size, "%s:%s",
388 wp->user, (wp->pass == NULL) ? "" : wp->pass);
389 curl_easy_setopt (wp->curl, CURLOPT_USERPWD, wp->credentials);
392 curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYPEER, (long) wp->verify_peer);
393 curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYHOST,
394 wp->verify_host ? 2L : 0L);
395 if (wp->cacert != NULL)
396 curl_easy_setopt (wp->curl, CURLOPT_CAINFO, wp->cacert);
397 if (wp->headers != NULL)
398 curl_easy_setopt (wp->curl, CURLOPT_HTTPHEADER, wp->headers);
399 if (wp->post_body != NULL)
400 curl_easy_setopt (wp->curl, CURLOPT_POSTFIELDS, wp->post_body);
403 } /* }}} int cc_page_init_curl */
405 static int cc_config_add_page (oconfig_item_t *ci) /* {{{ */
411 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
413 WARNING ("curl plugin: `Page' blocks need exactly one string argument.");
417 page = (web_page_t *) malloc (sizeof (*page));
420 ERROR ("curl plugin: malloc failed.");
423 memset (page, 0, sizeof (*page));
427 page->verify_peer = 1;
428 page->verify_host = 1;
429 page->response_time = 0;
431 page->instance = strdup (ci->values[0].value.string);
432 if (page->instance == NULL)
434 ERROR ("curl plugin: strdup failed.");
439 /* Process all children */
441 for (i = 0; i < ci->children_num; i++)
443 oconfig_item_t *child = ci->children + i;
445 if (strcasecmp ("URL", child->key) == 0)
446 status = cf_util_get_string (child, &page->url);
447 else if (strcasecmp ("User", child->key) == 0)
448 status = cf_util_get_string (child, &page->user);
449 else if (strcasecmp ("Password", child->key) == 0)
450 status = cf_util_get_string (child, &page->pass);
451 else if (strcasecmp ("VerifyPeer", child->key) == 0)
452 status = cf_util_get_boolean (child, &page->verify_peer);
453 else if (strcasecmp ("VerifyHost", child->key) == 0)
454 status = cf_util_get_boolean (child, &page->verify_host);
455 else if (strcasecmp ("MeasureResponseTime", child->key) == 0)
456 status = cf_util_get_boolean (child, &page->response_time);
457 else if (strcasecmp ("CACert", child->key) == 0)
458 status = cf_util_get_string (child, &page->cacert);
459 else if (strcasecmp ("Match", child->key) == 0)
460 /* Be liberal with failing matches => don't set `status'. */
461 cc_config_add_match (page, child);
462 else if (strcasecmp ("Header", child->key) == 0)
463 status = cc_config_append_string ("Header", &page->headers, child);
464 else if (strcasecmp ("Post", child->key) == 0)
465 status = cf_util_get_string (child, &page->post_body);
468 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
474 } /* for (i = 0; i < ci->children_num; i++) */
476 /* Additionial sanity checks and libCURL initialization. */
479 if (page->url == NULL)
481 WARNING ("curl plugin: `URL' missing in `Page' block.");
485 if (page->matches == NULL && !page->response_time)
487 assert (page->instance != NULL);
488 WARNING ("curl plugin: No (valid) `Match' block "
489 "or MeasureResponseTime within `Page' block `%s'.", page->instance);
494 status = cc_page_init_curl (page);
497 } /* while (status == 0) */
501 cc_web_page_free (page);
505 /* Add the new page to the linked list */
513 while ((prev != NULL) && (prev->next != NULL))
519 } /* }}} int cc_config_add_page */
521 static int cc_config (oconfig_item_t *ci) /* {{{ */
531 for (i = 0; i < ci->children_num; i++)
533 oconfig_item_t *child = ci->children + i;
535 if (strcasecmp ("Page", child->key) == 0)
537 status = cc_config_add_page (child);
545 WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
550 if ((success == 0) && (errors > 0))
552 ERROR ("curl plugin: All statements failed.");
557 } /* }}} int cc_config */
559 static int cc_init (void) /* {{{ */
563 INFO ("curl plugin: No pages have been defined.");
566 curl_global_init (CURL_GLOBAL_SSL);
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)
574 value_list_t vl = VALUE_LIST_INIT;
576 values[0] = mv->value;
580 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
581 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
582 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
583 sstrncpy (vl.type, wm->type, sizeof (vl.type));
584 if (wm->instance != NULL)
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) /* {{{ */
593 value_list_t vl = VALUE_LIST_INIT;
595 values[0].gauge = seconds;
599 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
600 sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
601 sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
602 sstrncpy (vl.type, "response_time", sizeof (vl.type));
604 plugin_dispatch_values (&vl);
605 } /* }}} void cc_submit_response_time */
607 static int cc_read_page (web_page_t *wp) /* {{{ */
611 struct timeval start, end;
613 if (wp->response_time)
614 gettimeofday (&start, NULL);
617 status = curl_easy_perform (wp->curl);
618 if (status != CURLE_OK)
620 ERROR ("curl plugin: curl_easy_perform failed with staus %i: %s",
621 status, wp->curl_errbuf);
625 if (wp->response_time)
628 gettimeofday (&end, NULL);
629 secs += end.tv_sec - start.tv_sec;
630 secs += (end.tv_usec - start.tv_usec) / 1000000.0;
631 cc_submit_response_time (wp, secs);
634 for (wm = wp->matches; wm != NULL; wm = wm->next)
636 cu_match_value_t *mv;
638 status = match_apply (wm->match, wp->buffer);
641 WARNING ("curl plugin: match_apply failed.");
645 mv = match_get_user_data (wm->match);
648 WARNING ("curl plugin: match_get_user_data returned NULL.");
652 cc_submit (wp, wm, mv);
653 match_value_reset (mv);
654 } /* for (wm = wp->matches; wm != NULL; wm = wm->next) */
657 } /* }}} int cc_read_page */
659 static int cc_read (void) /* {{{ */
663 for (wp = pages_g; wp != NULL; wp = wp->next)
667 } /* }}} int cc_read */
669 static int cc_shutdown (void) /* {{{ */
671 cc_web_page_free (pages_g);
675 } /* }}} int cc_shutdown */
677 void module_register (void)
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 : */