1 /**
2 * collectd - src/write_http.c
3 * Copyright (C) 2009 Paul Sadauskas
4 * Copyright (C) 2009 Doug MacEachern
5 * Copyright (C) 2007-2014 Florian octo Forster
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; only version 2 of the License is applicable.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Florian octo Forster <octo at collectd.org>
22 * Doug MacEachern <dougm@hyperic.com>
23 * Paul Sadauskas <psadauskas@gmail.com>
24 **/
26 #include "collectd.h"
28 #include "plugin.h"
29 #include "common.h"
30 #include "utils_format_json.h"
31 #include "utils_format_kairosdb.h"
33 #include <curl/curl.h>
35 #ifndef WRITE_HTTP_DEFAULT_BUFFER_SIZE
36 # define WRITE_HTTP_DEFAULT_BUFFER_SIZE 4096
37 #endif
39 /*
40 * Private variables
41 */
42 struct wh_callback_s
43 {
44 char *name;
46 char *location;
47 char *user;
48 char *pass;
49 char *credentials;
50 _Bool verify_peer;
51 _Bool verify_host;
52 char *cacert;
53 char *capath;
54 char *clientkey;
55 char *clientcert;
56 char *clientkeypass;
57 long sslversion;
58 _Bool store_rates;
59 _Bool log_http_error;
60 int low_speed_limit;
61 time_t low_speed_time;
62 int timeout;
64 #define WH_FORMAT_COMMAND 0
65 #define WH_FORMAT_JSON 1
66 #define WH_FORMAT_KAIROSDB 2
67 int format;
68 _Bool send_metrics;
69 _Bool send_notifications;
71 CURL *curl;
72 struct curl_slist *headers;
73 char curl_errbuf[CURL_ERROR_SIZE];
75 char *send_buffer;
76 size_t send_buffer_size;
77 size_t send_buffer_free;
78 size_t send_buffer_fill;
79 cdtime_t send_buffer_init_time;
81 pthread_mutex_t send_lock;
82 };
83 typedef struct wh_callback_s wh_callback_t;
85 static void wh_log_http_error (wh_callback_t *cb)
86 {
87 if (!cb->log_http_error)
88 return;
90 long http_code = 0;
92 curl_easy_getinfo (cb->curl, CURLINFO_RESPONSE_CODE, &http_code);
94 if (http_code != 200)
95 INFO ("write_http plugin: HTTP Error code: %lu", http_code);
96 }
98 static void wh_reset_buffer (wh_callback_t *cb) /* {{{ */
99 {
100 if ((cb == NULL) || (cb->send_buffer == NULL))
101 return;
103 memset (cb->send_buffer, 0, cb->send_buffer_size);
104 cb->send_buffer_free = cb->send_buffer_size;
105 cb->send_buffer_fill = 0;
106 cb->send_buffer_init_time = cdtime ();
108 if (cb->format == WH_FORMAT_JSON || cb->format == WH_FORMAT_KAIROSDB)
109 {
110 format_json_initialize (cb->send_buffer,
111 &cb->send_buffer_fill,
112 &cb->send_buffer_free);
113 }
114 } /* }}} wh_reset_buffer */
116 /* must hold cb->send_lock when calling */
117 static int wh_post_nolock (wh_callback_t *cb, char const *data) /* {{{ */
118 {
119 int status = 0;
121 curl_easy_setopt (cb->curl, CURLOPT_POSTFIELDS, data);
122 status = curl_easy_perform (cb->curl);
124 wh_log_http_error (cb);
126 if (status != CURLE_OK)
127 {
128 ERROR ("write_http plugin: curl_easy_perform failed with "
129 "status %i: %s",
130 status, cb->curl_errbuf);
131 }
132 return (status);
133 } /* }}} wh_post_nolock */
135 static int wh_callback_init (wh_callback_t *cb) /* {{{ */
136 {
137 if (cb->curl != NULL)
138 return (0);
140 cb->curl = curl_easy_init ();
141 if (cb->curl == NULL)
142 {
143 ERROR ("curl plugin: curl_easy_init failed.");
144 return (-1);
145 }
147 if (cb->low_speed_limit > 0 && cb->low_speed_time > 0)
148 {
149 curl_easy_setopt (cb->curl, CURLOPT_LOW_SPEED_LIMIT,
150 (long) (cb->low_speed_limit * cb->low_speed_time));
151 curl_easy_setopt (cb->curl, CURLOPT_LOW_SPEED_TIME,
152 (long) cb->low_speed_time);
153 }
155 #ifdef HAVE_CURLOPT_TIMEOUT_MS
156 if (cb->timeout > 0)
157 curl_easy_setopt (cb->curl, CURLOPT_TIMEOUT_MS, (long) cb->timeout);
158 #endif
160 curl_easy_setopt (cb->curl, CURLOPT_NOSIGNAL, 1L);
161 curl_easy_setopt (cb->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
163 cb->headers = curl_slist_append (cb->headers, "Accept: */*");
164 if (cb->format == WH_FORMAT_JSON || cb->format == WH_FORMAT_KAIROSDB)
165 cb->headers = curl_slist_append (cb->headers, "Content-Type: application/json");
166 else
167 cb->headers = curl_slist_append (cb->headers, "Content-Type: text/plain");
168 cb->headers = curl_slist_append (cb->headers, "Expect:");
169 curl_easy_setopt (cb->curl, CURLOPT_HTTPHEADER, cb->headers);
171 curl_easy_setopt (cb->curl, CURLOPT_ERRORBUFFER, cb->curl_errbuf);
172 curl_easy_setopt (cb->curl, CURLOPT_URL, cb->location);
173 curl_easy_setopt (cb->curl, CURLOPT_FOLLOWLOCATION, 1L);
174 curl_easy_setopt (cb->curl, CURLOPT_MAXREDIRS, 50L);
176 if (cb->user != NULL)
177 {
178 #ifdef HAVE_CURLOPT_USERNAME
179 curl_easy_setopt (cb->curl, CURLOPT_USERNAME, cb->user);
180 curl_easy_setopt (cb->curl, CURLOPT_PASSWORD,
181 (cb->pass == NULL) ? "" : cb->pass);
182 #else
183 size_t credentials_size;
185 credentials_size = strlen (cb->user) + 2;
186 if (cb->pass != NULL)
187 credentials_size += strlen (cb->pass);
189 cb->credentials = malloc (credentials_size);
190 if (cb->credentials == NULL)
191 {
192 ERROR ("curl plugin: malloc failed.");
193 return (-1);
194 }
196 ssnprintf (cb->credentials, credentials_size, "%s:%s",
197 cb->user, (cb->pass == NULL) ? "" : cb->pass);
198 curl_easy_setopt (cb->curl, CURLOPT_USERPWD, cb->credentials);
199 #endif
200 curl_easy_setopt (cb->curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
201 }
203 curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYPEER, (long) cb->verify_peer);
204 curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYHOST,
205 cb->verify_host ? 2L : 0L);
206 curl_easy_setopt (cb->curl, CURLOPT_SSLVERSION, cb->sslversion);
207 if (cb->cacert != NULL)
208 curl_easy_setopt (cb->curl, CURLOPT_CAINFO, cb->cacert);
209 if (cb->capath != NULL)
210 curl_easy_setopt (cb->curl, CURLOPT_CAPATH, cb->capath);
212 if (cb->clientkey != NULL && cb->clientcert != NULL)
213 {
214 curl_easy_setopt (cb->curl, CURLOPT_SSLKEY, cb->clientkey);
215 curl_easy_setopt (cb->curl, CURLOPT_SSLCERT, cb->clientcert);
217 if (cb->clientkeypass != NULL)
218 curl_easy_setopt (cb->curl, CURLOPT_SSLKEYPASSWD, cb->clientkeypass);
219 }
221 wh_reset_buffer (cb);
223 return (0);
224 } /* }}} int wh_callback_init */
226 static int wh_flush_nolock (cdtime_t timeout, wh_callback_t *cb) /* {{{ */
227 {
228 int status;
230 DEBUG ("write_http plugin: wh_flush_nolock: timeout = %.3f; "
231 "send_buffer_fill = %zu;",
232 CDTIME_T_TO_DOUBLE (timeout),
233 cb->send_buffer_fill);
235 /* timeout == 0 => flush unconditionally */
236 if (timeout > 0)
237 {
238 cdtime_t now;
240 now = cdtime ();
241 if ((cb->send_buffer_init_time + timeout) > now)
242 return (0);
243 }
245 if (cb->format == WH_FORMAT_COMMAND)
246 {
247 if (cb->send_buffer_fill == 0)
248 {
249 cb->send_buffer_init_time = cdtime ();
250 return (0);
251 }
253 status = wh_post_nolock (cb, cb->send_buffer);
254 wh_reset_buffer (cb);
255 }
256 else if (cb->format == WH_FORMAT_JSON || cb->format == WH_FORMAT_KAIROSDB)
257 {
258 if (cb->send_buffer_fill <= 2)
259 {
260 cb->send_buffer_init_time = cdtime ();
261 return (0);
262 }
264 status = format_json_finalize (cb->send_buffer,
265 &cb->send_buffer_fill,
266 &cb->send_buffer_free);
267 if (status != 0)
268 {
269 ERROR ("write_http: wh_flush_nolock: "
270 "format_json_finalize failed.");
271 wh_reset_buffer (cb);
272 return (status);
273 }
275 status = wh_post_nolock (cb, cb->send_buffer);
276 wh_reset_buffer (cb);
277 }
278 else
279 {
280 ERROR ("write_http: wh_flush_nolock: "
281 "Unknown format: %i",
282 cb->format);
283 return (-1);
284 }
286 return (status);
287 } /* }}} wh_flush_nolock */
289 static int wh_flush (cdtime_t timeout, /* {{{ */
290 const char *identifier __attribute__((unused)),
291 user_data_t *user_data)
292 {
293 wh_callback_t *cb;
294 int status;
296 if (user_data == NULL)
297 return (-EINVAL);
299 cb = user_data->data;
301 pthread_mutex_lock (&cb->send_lock);
303 if (wh_callback_init (cb) != 0)
304 {
305 ERROR ("write_http plugin: wh_callback_init failed.");
306 pthread_mutex_unlock (&cb->send_lock);
307 return (-1);
308 }
310 status = wh_flush_nolock (timeout, cb);
311 pthread_mutex_unlock (&cb->send_lock);
313 return (status);
314 } /* }}} int wh_flush */
316 static void wh_callback_free (void *data) /* {{{ */
317 {
318 wh_callback_t *cb;
320 if (data == NULL)
321 return;
323 cb = data;
325 if (cb->send_buffer != NULL)
326 wh_flush_nolock (/* timeout = */ 0, cb);
328 if (cb->curl != NULL)
329 {
330 curl_easy_cleanup (cb->curl);
331 cb->curl = NULL;
332 }
334 if (cb->headers != NULL)
335 {
336 curl_slist_free_all (cb->headers);
337 cb->headers = NULL;
338 }
340 sfree (cb->name);
341 sfree (cb->location);
342 sfree (cb->user);
343 sfree (cb->pass);
344 sfree (cb->credentials);
345 sfree (cb->cacert);
346 sfree (cb->capath);
347 sfree (cb->clientkey);
348 sfree (cb->clientcert);
349 sfree (cb->clientkeypass);
350 sfree (cb->send_buffer);
352 sfree (cb);
353 } /* }}} void wh_callback_free */
355 static int wh_write_command (const data_set_t *ds, const value_list_t *vl, /* {{{ */
356 wh_callback_t *cb)
357 {
358 char key[10*DATA_MAX_NAME_LEN];
359 char values[512];
360 char command[1024];
361 size_t command_len;
363 int status;
365 if (0 != strcmp (ds->type, vl->type)) {
366 ERROR ("write_http plugin: DS type does not match "
367 "value list type");
368 return -1;
369 }
371 /* Copy the identifier to `key' and escape it. */
372 status = FORMAT_VL (key, sizeof (key), vl);
373 if (status != 0) {
374 ERROR ("write_http plugin: error with format_name");
375 return (status);
376 }
377 escape_string (key, sizeof (key));
379 /* Convert the values to an ASCII representation and put that into
380 * `values'. */
381 status = format_values (values, sizeof (values), ds, vl, cb->store_rates);
382 if (status != 0) {
383 ERROR ("write_http plugin: error with "
384 "wh_value_list_to_string");
385 return (status);
386 }
388 command_len = (size_t) ssnprintf (command, sizeof (command),
389 "PUTVAL %s interval=%.3f %s\r\n",
390 key,
391 CDTIME_T_TO_DOUBLE (vl->interval),
392 values);
393 if (command_len >= sizeof (command)) {
394 ERROR ("write_http plugin: Command buffer too small: "
395 "Need %zu bytes.", command_len + 1);
396 return (-1);
397 }
399 pthread_mutex_lock (&cb->send_lock);
400 if (wh_callback_init (cb) != 0)
401 {
402 ERROR ("write_http plugin: wh_callback_init failed.");
403 pthread_mutex_unlock (&cb->send_lock);
404 return (-1);
405 }
407 if (command_len >= cb->send_buffer_free)
408 {
409 status = wh_flush_nolock (/* timeout = */ 0, cb);
410 if (status != 0)
411 {
412 pthread_mutex_unlock (&cb->send_lock);
413 return (status);
414 }
415 }
416 assert (command_len < cb->send_buffer_free);
418 /* `command_len + 1' because `command_len' does not include the
419 * trailing null byte. Neither does `send_buffer_fill'. */
420 memcpy (cb->send_buffer + cb->send_buffer_fill,
421 command, command_len + 1);
422 cb->send_buffer_fill += command_len;
423 cb->send_buffer_free -= command_len;
425 DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%) \"%s\"",
426 cb->location,
427 cb->send_buffer_fill, cb->send_buffer_size,
428 100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size),
429 command);
431 /* Check if we have enough space for this command. */
432 pthread_mutex_unlock (&cb->send_lock);
434 return (0);
435 } /* }}} int wh_write_command */
437 static int wh_write_json (const data_set_t *ds, const value_list_t *vl, /* {{{ */
438 wh_callback_t *cb)
439 {
440 int status;
442 pthread_mutex_lock (&cb->send_lock);
443 if (wh_callback_init (cb) != 0)
444 {
445 ERROR ("write_http plugin: wh_callback_init failed.");
446 pthread_mutex_unlock (&cb->send_lock);
447 return (-1);
448 }
450 status = format_json_value_list (cb->send_buffer,
451 &cb->send_buffer_fill,
452 &cb->send_buffer_free,
453 ds, vl, cb->store_rates);
454 if (status == -ENOMEM)
455 {
456 status = wh_flush_nolock (/* timeout = */ 0, cb);
457 if (status != 0)
458 {
459 wh_reset_buffer (cb);
460 pthread_mutex_unlock (&cb->send_lock);
461 return (status);
462 }
464 status = format_json_value_list (cb->send_buffer,
465 &cb->send_buffer_fill,
466 &cb->send_buffer_free,
467 ds, vl, cb->store_rates);
468 }
469 if (status != 0)
470 {
471 pthread_mutex_unlock (&cb->send_lock);
472 return (status);
473 }
475 DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%)",
476 cb->location,
477 cb->send_buffer_fill, cb->send_buffer_size,
478 100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size));
480 /* Check if we have enough space for this command. */
481 pthread_mutex_unlock (&cb->send_lock);
483 return (0);
484 } /* }}} int wh_write_json */
486 static int wh_write_kairosdb (const data_set_t *ds, const value_list_t *vl, /* {{{ */
487 wh_callback_t *cb)
488 {
489 int status;
491 pthread_mutex_lock (&cb->send_lock);
493 if (cb->curl == NULL)
494 {
495 status = wh_callback_init (cb);
496 if (status != 0)
497 {
498 ERROR ("write_http plugin: wh_callback_init failed.");
499 pthread_mutex_unlock (&cb->send_lock);
500 return (-1);
501 }
502 }
504 status = format_kairosdb_value_list (cb->send_buffer,
505 &cb->send_buffer_fill,
506 &cb->send_buffer_free,
507 ds, vl, cb->store_rates);
508 if (status == -ENOMEM)
509 {
510 status = wh_flush_nolock (/* timeout = */ 0, cb);
511 if (status != 0)
512 {
513 wh_reset_buffer (cb);
514 pthread_mutex_unlock (&cb->send_lock);
515 return (status);
516 }
518 status = format_kairosdb_value_list (cb->send_buffer,
519 &cb->send_buffer_fill,
520 &cb->send_buffer_free,
521 ds, vl, cb->store_rates);
522 }
523 if (status != 0)
524 {
525 pthread_mutex_unlock (&cb->send_lock);
526 return (status);
527 }
529 DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%)",
530 cb->location,
531 cb->send_buffer_fill, cb->send_buffer_size,
532 100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size));
534 /* Check if we have enough space for this command. */
535 pthread_mutex_unlock (&cb->send_lock);
537 return (0);
538 } /* }}} int wh_write_kairosdb */
540 static int wh_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
541 user_data_t *user_data)
542 {
543 wh_callback_t *cb;
544 int status;
546 if (user_data == NULL)
547 return (-EINVAL);
549 cb = user_data->data;
550 assert (cb->send_metrics);
552 switch(cb->format) {
553 case WH_FORMAT_JSON:
554 status = wh_write_json (ds, vl, cb);
555 break;
556 case WH_FORMAT_KAIROSDB:
557 status = wh_write_kairosdb (ds, vl, cb);
558 break;
559 default:
560 status = wh_write_command (ds, vl, cb);
561 break;
562 }
563 return (status);
564 } /* }}} int wh_write */
566 static int wh_notify (notification_t const *n, user_data_t *ud) /* {{{ */
567 {
568 wh_callback_t *cb;
569 char alert[4096];
570 int status;
572 if ((ud == NULL) || (ud->data == NULL))
573 return (EINVAL);
575 cb = ud->data;
576 assert (cb->send_notifications);
578 status = format_json_notification (alert, sizeof (alert), n);
579 if (status != 0)
580 {
581 ERROR ("write_http plugin: formatting notification failed");
582 return status;
583 }
585 pthread_mutex_lock (&cb->send_lock);
586 if (wh_callback_init (cb) != 0)
587 {
588 ERROR ("write_http plugin: wh_callback_init failed.");
589 pthread_mutex_unlock (&cb->send_lock);
590 return (-1);
591 }
593 status = wh_post_nolock (cb, alert);
594 pthread_mutex_unlock (&cb->send_lock);
596 return (status);
597 } /* }}} int wh_notify */
599 static int config_set_format (wh_callback_t *cb, /* {{{ */
600 oconfig_item_t *ci)
601 {
602 char *string;
604 if ((ci->values_num != 1)
605 || (ci->values[0].type != OCONFIG_TYPE_STRING))
606 {
607 WARNING ("write_http plugin: The `%s' config option "
608 "needs exactly one string argument.", ci->key);
609 return (-1);
610 }
612 string = ci->values[0].value.string;
613 if (strcasecmp ("Command", string) == 0)
614 cb->format = WH_FORMAT_COMMAND;
615 else if (strcasecmp ("JSON", string) == 0)
616 cb->format = WH_FORMAT_JSON;
617 else if (strcasecmp ("KAIROSDB", string) == 0)
618 cb->format = WH_FORMAT_KAIROSDB;
619 else
620 {
621 ERROR ("write_http plugin: Invalid format string: %s",
622 string);
623 return (-1);
624 }
626 return (0);
627 } /* }}} int config_set_format */
629 static int wh_config_append_string (const char *name, struct curl_slist **dest, /* {{{ */
630 oconfig_item_t *ci)
631 {
632 struct curl_slist *temp = NULL;
633 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
634 {
635 WARNING ("write_http plugin: `%s' needs exactly one string argument.", name);
636 return (-1);
637 }
639 temp = curl_slist_append(*dest, ci->values[0].value.string);
640 if (temp == NULL)
641 return (-1);
643 *dest = temp;
645 return (0);
646 } /* }}} int wh_config_append_string */
648 static int wh_config_node (oconfig_item_t *ci) /* {{{ */
649 {
650 wh_callback_t *cb;
651 int buffer_size = 0;
652 user_data_t user_data = { 0 };
653 char callback_name[DATA_MAX_NAME_LEN];
654 int status = 0;
656 cb = calloc (1, sizeof (*cb));
657 if (cb == NULL)
658 {
659 ERROR ("write_http plugin: calloc failed.");
660 return (-1);
661 }
662 cb->verify_peer = 1;
663 cb->verify_host = 1;
664 cb->format = WH_FORMAT_COMMAND;
665 cb->sslversion = CURL_SSLVERSION_DEFAULT;
666 cb->low_speed_limit = 0;
667 cb->timeout = 0;
668 cb->log_http_error = 0;
669 cb->headers = NULL;
670 cb->send_metrics = 1;
671 cb->send_notifications = 0;
673 pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
675 cf_util_get_string (ci, &cb->name);
677 /* FIXME: Remove this legacy mode in version 6. */
678 if (strcasecmp ("URL", ci->key) == 0)
679 cf_util_get_string (ci, &cb->location);
681 for (int i = 0; i < ci->children_num; i++)
682 {
683 oconfig_item_t *child = ci->children + i;
685 if (strcasecmp ("URL", child->key) == 0)
686 status = cf_util_get_string (child, &cb->location);
687 else if (strcasecmp ("User", child->key) == 0)
688 status = cf_util_get_string (child, &cb->user);
689 else if (strcasecmp ("Password", child->key) == 0)
690 status = cf_util_get_string (child, &cb->pass);
691 else if (strcasecmp ("VerifyPeer", child->key) == 0)
692 status = cf_util_get_boolean (child, &cb->verify_peer);
693 else if (strcasecmp ("VerifyHost", child->key) == 0)
694 status = cf_util_get_boolean (child, &cb->verify_host);
695 else if (strcasecmp ("CACert", child->key) == 0)
696 status = cf_util_get_string (child, &cb->cacert);
697 else if (strcasecmp ("CAPath", child->key) == 0)
698 status = cf_util_get_string (child, &cb->capath);
699 else if (strcasecmp ("ClientKey", child->key) == 0)
700 status = cf_util_get_string (child, &cb->clientkey);
701 else if (strcasecmp ("ClientCert", child->key) == 0)
702 status = cf_util_get_string (child, &cb->clientcert);
703 else if (strcasecmp ("ClientKeyPass", child->key) == 0)
704 status = cf_util_get_string (child, &cb->clientkeypass);
705 else if (strcasecmp ("SSLVersion", child->key) == 0)
706 {
707 char *value = NULL;
709 status = cf_util_get_string (child, &value);
710 if (status != 0)
711 break;
713 if (value == NULL || strcasecmp ("default", value) == 0)
714 cb->sslversion = CURL_SSLVERSION_DEFAULT;
715 else if (strcasecmp ("SSLv2", value) == 0)
716 cb->sslversion = CURL_SSLVERSION_SSLv2;
717 else if (strcasecmp ("SSLv3", value) == 0)
718 cb->sslversion = CURL_SSLVERSION_SSLv3;
719 else if (strcasecmp ("TLSv1", value) == 0)
720 cb->sslversion = CURL_SSLVERSION_TLSv1;
721 #if (LIBCURL_VERSION_MAJOR > 7) || (LIBCURL_VERSION_MAJOR == 7 && LIBCURL_VERSION_MINOR >= 34)
722 else if (strcasecmp ("TLSv1_0", value) == 0)
723 cb->sslversion = CURL_SSLVERSION_TLSv1_0;
724 else if (strcasecmp ("TLSv1_1", value) == 0)
725 cb->sslversion = CURL_SSLVERSION_TLSv1_1;
726 else if (strcasecmp ("TLSv1_2", value) == 0)
727 cb->sslversion = CURL_SSLVERSION_TLSv1_2;
728 #endif
729 else
730 {
731 ERROR ("write_http plugin: Invalid SSLVersion "
732 "option: %s.", value);
733 status = EINVAL;
734 }
736 sfree(value);
737 }
738 else if (strcasecmp ("Format", child->key) == 0)
739 status = config_set_format (cb, child);
740 else if (strcasecmp ("Metrics", child->key) == 0)
741 cf_util_get_boolean (child, &cb->send_metrics);
742 else if (strcasecmp ("Notifications", child->key) == 0)
743 cf_util_get_boolean (child, &cb->send_notifications);
744 else if (strcasecmp ("StoreRates", child->key) == 0)
745 status = cf_util_get_boolean (child, &cb->store_rates);
746 else if (strcasecmp ("BufferSize", child->key) == 0)
747 status = cf_util_get_int (child, &buffer_size);
748 else if (strcasecmp ("LowSpeedLimit", child->key) == 0)
749 status = cf_util_get_int (child, &cb->low_speed_limit);
750 else if (strcasecmp ("Timeout", child->key) == 0)
751 status = cf_util_get_int (child, &cb->timeout);
752 else if (strcasecmp ("LogHttpError", child->key) == 0)
753 status = cf_util_get_boolean (child, &cb->log_http_error);
754 else if (strcasecmp ("Header", child->key) == 0)
755 status = wh_config_append_string ("Header", &cb->headers, child);
756 else
757 {
758 ERROR ("write_http plugin: Invalid configuration "
759 "option: %s.", child->key);
760 status = EINVAL;
761 }
763 if (status != 0)
764 break;
765 }
767 if (status != 0)
768 {
769 wh_callback_free (cb);
770 return (status);
771 }
773 if (cb->location == NULL)
774 {
775 ERROR ("write_http plugin: no URL defined for instance '%s'",
776 cb->name);
777 wh_callback_free (cb);
778 return (-1);
779 }
781 if (!cb->send_metrics && !cb->send_notifications)
782 {
783 ERROR ("write_http plugin: Neither metrics nor notifications "
784 "are enabled for \"%s\".", cb->name);
785 wh_callback_free (cb);
786 return (-1);
787 }
789 if (cb->low_speed_limit > 0)
790 cb->low_speed_time = CDTIME_T_TO_TIME_T(plugin_get_interval());
792 /* Determine send_buffer_size. */
793 cb->send_buffer_size = WRITE_HTTP_DEFAULT_BUFFER_SIZE;
794 if (buffer_size >= 1024)
795 cb->send_buffer_size = (size_t) buffer_size;
796 else if (buffer_size != 0)
797 ERROR ("write_http plugin: Ignoring invalid BufferSize setting (%d).",
798 buffer_size);
800 /* Allocate the buffer. */
801 cb->send_buffer = malloc (cb->send_buffer_size);
802 if (cb->send_buffer == NULL)
803 {
804 ERROR ("write_http plugin: malloc(%zu) failed.", cb->send_buffer_size);
805 wh_callback_free (cb);
806 return (-1);
807 }
808 /* Nulls the buffer and sets ..._free and ..._fill. */
809 wh_reset_buffer (cb);
811 ssnprintf (callback_name, sizeof (callback_name), "write_http/%s",
812 cb->name);
813 DEBUG ("write_http: Registering write callback '%s' with URL '%s'",
814 callback_name, cb->location);
816 user_data.data = cb;
817 plugin_register_flush (callback_name, wh_flush, &user_data);
819 user_data.free_func = wh_callback_free;
821 if (cb->send_metrics)
822 {
823 plugin_register_write (callback_name, wh_write, &user_data);
824 user_data.free_func = NULL;
826 plugin_register_flush (callback_name, wh_flush, &user_data);
827 }
829 if (cb->send_notifications)
830 {
831 plugin_register_notification (callback_name, wh_notify, &user_data);
832 user_data.free_func = NULL;
833 }
835 return (0);
836 } /* }}} int wh_config_node */
838 static int wh_config (oconfig_item_t *ci) /* {{{ */
839 {
840 for (int i = 0; i < ci->children_num; i++)
841 {
842 oconfig_item_t *child = ci->children + i;
844 if (strcasecmp ("Node", child->key) == 0)
845 wh_config_node (child);
846 /* FIXME: Remove this legacy mode in version 6. */
847 else if (strcasecmp ("URL", child->key) == 0) {
848 WARNING ("write_http plugin: Legacy <URL> block found. "
849 "Please use <Node> instead.");
850 wh_config_node (child);
851 }
852 else
853 {
854 ERROR ("write_http plugin: Invalid configuration "
855 "option: %s.", child->key);
856 }
857 }
859 return (0);
860 } /* }}} int wh_config */
862 static int wh_init (void) /* {{{ */
863 {
864 /* Call this while collectd is still single-threaded to avoid
865 * initialization issues in libgcrypt. */
866 curl_global_init (CURL_GLOBAL_SSL);
867 return (0);
868 } /* }}} int wh_init */
870 void module_register (void) /* {{{ */
871 {
872 plugin_register_complex_config ("write_http", wh_config);
873 plugin_register_init ("write_http", wh_init);
874 } /* }}} void module_register */
876 /* vim: set fdm=marker sw=8 ts=8 tw=78 et : */