Add missing kstat definitions
[collectd.git] / src / write_http.c
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  **/
25
26 #include "collectd.h"
27 #include "plugin.h"
28 #include "common.h"
29 #include "utils_cache.h"
30 #include "utils_format_json.h"
31
32 #if HAVE_PTHREAD_H
33 # include <pthread.h>
34 #endif
35
36 #include <curl/curl.h>
37
38 #ifndef WRITE_HTTP_DEFAULT_BUFFER_SIZE
39 # define WRITE_HTTP_DEFAULT_BUFFER_SIZE 4096
40 #endif
41
42 /*
43  * Private variables
44  */
45 struct wh_callback_s
46 {
47         char *name;
48
49         char *location;
50         char *user;
51         char *pass;
52         char *credentials;
53         _Bool verify_peer;
54         _Bool verify_host;
55         char *cacert;
56         char *capath;
57         char *clientkey;
58         char *clientcert;
59         char *clientkeypass;
60         long sslversion;
61         _Bool store_rates;
62         int   low_speed_limit;
63         time_t low_speed_time;
64         int timeout;
65
66 #define WH_FORMAT_COMMAND 0
67 #define WH_FORMAT_JSON    1
68         int format;
69
70         CURL *curl;
71         char curl_errbuf[CURL_ERROR_SIZE];
72
73         char  *send_buffer;
74         size_t send_buffer_size;
75         size_t send_buffer_free;
76         size_t send_buffer_fill;
77         cdtime_t send_buffer_init_time;
78
79         pthread_mutex_t send_lock;
80 };
81 typedef struct wh_callback_s wh_callback_t;
82
83 static void wh_reset_buffer (wh_callback_t *cb)  /* {{{ */
84 {
85         memset (cb->send_buffer, 0, cb->send_buffer_size);
86         cb->send_buffer_free = cb->send_buffer_size;
87         cb->send_buffer_fill = 0;
88         cb->send_buffer_init_time = cdtime ();
89
90         if (cb->format == WH_FORMAT_JSON)
91         {
92                 format_json_initialize (cb->send_buffer,
93                                 &cb->send_buffer_fill,
94                                 &cb->send_buffer_free);
95         }
96 } /* }}} wh_reset_buffer */
97
98 static int wh_send_buffer (wh_callback_t *cb) /* {{{ */
99 {
100         int status = 0;
101
102         curl_easy_setopt (cb->curl, CURLOPT_POSTFIELDS, cb->send_buffer);
103         status = curl_easy_perform (cb->curl);
104         if (status != CURLE_OK)
105         {
106                 ERROR ("write_http plugin: curl_easy_perform failed with "
107                                 "status %i: %s",
108                                 status, cb->curl_errbuf);
109         }
110         return (status);
111 } /* }}} wh_send_buffer */
112
113 static int wh_callback_init (wh_callback_t *cb) /* {{{ */
114 {
115         struct curl_slist *headers;
116
117         if (cb->curl != NULL)
118                 return (0);
119
120         cb->curl = curl_easy_init ();
121         if (cb->curl == NULL)
122         {
123                 ERROR ("curl plugin: curl_easy_init failed.");
124                 return (-1);
125         }
126
127         if (cb->low_speed_limit > 0 && cb->low_speed_time > 0)
128         {
129                 curl_easy_setopt (cb->curl, CURLOPT_LOW_SPEED_LIMIT,
130                                   (long) (cb->low_speed_limit * cb->low_speed_time));
131                 curl_easy_setopt (cb->curl, CURLOPT_LOW_SPEED_TIME,
132                                   (long) cb->low_speed_time);
133         }
134
135 #ifdef HAVE_CURLOPT_TIMEOUT_MS
136         if (cb->timeout > 0)
137                 curl_easy_setopt (cb->curl, CURLOPT_TIMEOUT_MS, (long) cb->timeout);
138 #endif
139
140         curl_easy_setopt (cb->curl, CURLOPT_NOSIGNAL, 1L);
141         curl_easy_setopt (cb->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
142
143         headers = NULL;
144         headers = curl_slist_append (headers, "Accept:  */*");
145         if (cb->format == WH_FORMAT_JSON)
146                 headers = curl_slist_append (headers, "Content-Type: application/json");
147         else
148                 headers = curl_slist_append (headers, "Content-Type: text/plain");
149         headers = curl_slist_append (headers, "Expect:");
150         curl_easy_setopt (cb->curl, CURLOPT_HTTPHEADER, headers);
151
152         curl_easy_setopt (cb->curl, CURLOPT_ERRORBUFFER, cb->curl_errbuf);
153         curl_easy_setopt (cb->curl, CURLOPT_URL, cb->location);
154         curl_easy_setopt (cb->curl, CURLOPT_FOLLOWLOCATION, 1L);
155         curl_easy_setopt (cb->curl, CURLOPT_MAXREDIRS, 50L);
156
157         if (cb->user != NULL)
158         {
159 #ifdef HAVE_CURLOPT_USERNAME
160                 curl_easy_setopt (cb->curl, CURLOPT_USERNAME, cb->user);
161                 curl_easy_setopt (cb->curl, CURLOPT_PASSWORD,
162                         (cb->pass == NULL) ? "" : cb->pass);
163 #else
164                 size_t credentials_size;
165
166                 credentials_size = strlen (cb->user) + 2;
167                 if (cb->pass != NULL)
168                         credentials_size += strlen (cb->pass);
169
170                 cb->credentials = (char *) malloc (credentials_size);
171                 if (cb->credentials == NULL)
172                 {
173                         ERROR ("curl plugin: malloc failed.");
174                         return (-1);
175                 }
176
177                 ssnprintf (cb->credentials, credentials_size, "%s:%s",
178                                 cb->user, (cb->pass == NULL) ? "" : cb->pass);
179                 curl_easy_setopt (cb->curl, CURLOPT_USERPWD, cb->credentials);
180 #endif
181                 curl_easy_setopt (cb->curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
182         }
183
184         curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYPEER, (long) cb->verify_peer);
185         curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYHOST,
186                         cb->verify_host ? 2L : 0L);
187         curl_easy_setopt (cb->curl, CURLOPT_SSLVERSION, cb->sslversion);
188         if (cb->cacert != NULL)
189                 curl_easy_setopt (cb->curl, CURLOPT_CAINFO, cb->cacert);
190         if (cb->capath != NULL)
191                 curl_easy_setopt (cb->curl, CURLOPT_CAPATH, cb->capath);
192
193         if (cb->clientkey != NULL && cb->clientcert != NULL)
194         {
195             curl_easy_setopt (cb->curl, CURLOPT_SSLKEY, cb->clientkey);
196             curl_easy_setopt (cb->curl, CURLOPT_SSLCERT, cb->clientcert);
197
198             if (cb->clientkeypass != NULL)
199                 curl_easy_setopt (cb->curl, CURLOPT_SSLKEYPASSWD, cb->clientkeypass);
200         }
201
202         wh_reset_buffer (cb);
203
204         return (0);
205 } /* }}} int wh_callback_init */
206
207 static int wh_flush_nolock (cdtime_t timeout, wh_callback_t *cb) /* {{{ */
208 {
209         int status;
210
211         DEBUG ("write_http plugin: wh_flush_nolock: timeout = %.3f; "
212                         "send_buffer_fill = %zu;",
213                         CDTIME_T_TO_DOUBLE (timeout),
214                         cb->send_buffer_fill);
215
216         /* timeout == 0  => flush unconditionally */
217         if (timeout > 0)
218         {
219                 cdtime_t now;
220
221                 now = cdtime ();
222                 if ((cb->send_buffer_init_time + timeout) > now)
223                         return (0);
224         }
225
226         if (cb->format == WH_FORMAT_COMMAND)
227         {
228                 if (cb->send_buffer_fill <= 0)
229                 {
230                         cb->send_buffer_init_time = cdtime ();
231                         return (0);
232                 }
233
234                 status = wh_send_buffer (cb);
235                 wh_reset_buffer (cb);
236         }
237         else if (cb->format == WH_FORMAT_JSON)
238         {
239                 if (cb->send_buffer_fill <= 2)
240                 {
241                         cb->send_buffer_init_time = cdtime ();
242                         return (0);
243                 }
244
245                 status = format_json_finalize (cb->send_buffer,
246                                 &cb->send_buffer_fill,
247                                 &cb->send_buffer_free);
248                 if (status != 0)
249                 {
250                         ERROR ("write_http: wh_flush_nolock: "
251                                         "format_json_finalize failed.");
252                         wh_reset_buffer (cb);
253                         return (status);
254                 }
255
256                 status = wh_send_buffer (cb);
257                 wh_reset_buffer (cb);
258         }
259         else
260         {
261                 ERROR ("write_http: wh_flush_nolock: "
262                                 "Unknown format: %i",
263                                 cb->format);
264                 return (-1);
265         }
266
267         return (status);
268 } /* }}} wh_flush_nolock */
269
270 static int wh_flush (cdtime_t timeout, /* {{{ */
271                 const char *identifier __attribute__((unused)),
272                 user_data_t *user_data)
273 {
274         wh_callback_t *cb;
275         int status;
276
277         if (user_data == NULL)
278                 return (-EINVAL);
279
280         cb = user_data->data;
281
282         pthread_mutex_lock (&cb->send_lock);
283
284         if (cb->curl == NULL)
285         {
286                 status = wh_callback_init (cb);
287                 if (status != 0)
288                 {
289                         ERROR ("write_http plugin: wh_callback_init failed.");
290                         pthread_mutex_unlock (&cb->send_lock);
291                         return (-1);
292                 }
293         }
294
295         status = wh_flush_nolock (timeout, cb);
296         pthread_mutex_unlock (&cb->send_lock);
297
298         return (status);
299 } /* }}} int wh_flush */
300
301 static void wh_callback_free (void *data) /* {{{ */
302 {
303         wh_callback_t *cb;
304
305         if (data == NULL)
306                 return;
307
308         cb = data;
309
310         wh_flush_nolock (/* timeout = */ 0, cb);
311
312         if (cb->curl != NULL)
313         {
314                 curl_easy_cleanup (cb->curl);
315                 cb->curl = NULL;
316         }
317         sfree (cb->name);
318         sfree (cb->location);
319         sfree (cb->user);
320         sfree (cb->pass);
321         sfree (cb->credentials);
322         sfree (cb->cacert);
323         sfree (cb->capath);
324         sfree (cb->clientkey);
325         sfree (cb->clientcert);
326         sfree (cb->clientkeypass);
327         sfree (cb->send_buffer);
328
329         sfree (cb);
330 } /* }}} void wh_callback_free */
331
332 static int wh_write_command (const data_set_t *ds, const value_list_t *vl, /* {{{ */
333                 wh_callback_t *cb)
334 {
335         char key[10*DATA_MAX_NAME_LEN];
336         char values[512];
337         char command[1024];
338         size_t command_len;
339
340         int status;
341
342         if (0 != strcmp (ds->type, vl->type)) {
343                 ERROR ("write_http plugin: DS type does not match "
344                                 "value list type");
345                 return -1;
346         }
347
348         /* Copy the identifier to `key' and escape it. */
349         status = FORMAT_VL (key, sizeof (key), vl);
350         if (status != 0) {
351                 ERROR ("write_http plugin: error with format_name");
352                 return (status);
353         }
354         escape_string (key, sizeof (key));
355
356         /* Convert the values to an ASCII representation and put that into
357          * `values'. */
358         status = format_values (values, sizeof (values), ds, vl, cb->store_rates);
359         if (status != 0) {
360                 ERROR ("write_http plugin: error with "
361                                 "wh_value_list_to_string");
362                 return (status);
363         }
364
365         command_len = (size_t) ssnprintf (command, sizeof (command),
366                         "PUTVAL %s interval=%.3f %s\r\n",
367                         key,
368                         CDTIME_T_TO_DOUBLE (vl->interval),
369                         values);
370         if (command_len >= sizeof (command)) {
371                 ERROR ("write_http plugin: Command buffer too small: "
372                                 "Need %zu bytes.", command_len + 1);
373                 return (-1);
374         }
375
376         pthread_mutex_lock (&cb->send_lock);
377
378         if (cb->curl == NULL)
379         {
380                 status = wh_callback_init (cb);
381                 if (status != 0)
382                 {
383                         ERROR ("write_http plugin: wh_callback_init failed.");
384                         pthread_mutex_unlock (&cb->send_lock);
385                         return (-1);
386                 }
387         }
388
389         if (command_len >= cb->send_buffer_free)
390         {
391                 status = wh_flush_nolock (/* timeout = */ 0, cb);
392                 if (status != 0)
393                 {
394                         pthread_mutex_unlock (&cb->send_lock);
395                         return (status);
396                 }
397         }
398         assert (command_len < cb->send_buffer_free);
399
400         /* `command_len + 1' because `command_len' does not include the
401          * trailing null byte. Neither does `send_buffer_fill'. */
402         memcpy (cb->send_buffer + cb->send_buffer_fill,
403                         command, command_len + 1);
404         cb->send_buffer_fill += command_len;
405         cb->send_buffer_free -= command_len;
406
407         DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%) \"%s\"",
408                         cb->location,
409                         cb->send_buffer_fill, cb->send_buffer_size,
410                         100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size),
411                         command);
412
413         /* Check if we have enough space for this command. */
414         pthread_mutex_unlock (&cb->send_lock);
415
416         return (0);
417 } /* }}} int wh_write_command */
418
419 static int wh_write_json (const data_set_t *ds, const value_list_t *vl, /* {{{ */
420                 wh_callback_t *cb)
421 {
422         int status;
423
424         pthread_mutex_lock (&cb->send_lock);
425
426         if (cb->curl == NULL)
427         {
428                 status = wh_callback_init (cb);
429                 if (status != 0)
430                 {
431                         ERROR ("write_http plugin: wh_callback_init failed.");
432                         pthread_mutex_unlock (&cb->send_lock);
433                         return (-1);
434                 }
435         }
436
437         status = format_json_value_list (cb->send_buffer,
438                         &cb->send_buffer_fill,
439                         &cb->send_buffer_free,
440                         ds, vl, cb->store_rates);
441         if (status == (-ENOMEM))
442         {
443                 status = wh_flush_nolock (/* timeout = */ 0, cb);
444                 if (status != 0)
445                 {
446                         wh_reset_buffer (cb);
447                         pthread_mutex_unlock (&cb->send_lock);
448                         return (status);
449                 }
450
451                 status = format_json_value_list (cb->send_buffer,
452                                 &cb->send_buffer_fill,
453                                 &cb->send_buffer_free,
454                                 ds, vl, cb->store_rates);
455         }
456         if (status != 0)
457         {
458                 pthread_mutex_unlock (&cb->send_lock);
459                 return (status);
460         }
461
462         DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%)",
463                         cb->location,
464                         cb->send_buffer_fill, cb->send_buffer_size,
465                         100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size));
466
467         /* Check if we have enough space for this command. */
468         pthread_mutex_unlock (&cb->send_lock);
469
470         return (0);
471 } /* }}} int wh_write_json */
472
473 static int wh_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
474                 user_data_t *user_data)
475 {
476         wh_callback_t *cb;
477         int status;
478
479         if (user_data == NULL)
480                 return (-EINVAL);
481
482         cb = user_data->data;
483
484         if (cb->format == WH_FORMAT_JSON)
485                 status = wh_write_json (ds, vl, cb);
486         else
487                 status = wh_write_command (ds, vl, cb);
488
489         return (status);
490 } /* }}} int wh_write */
491
492 static int config_set_format (wh_callback_t *cb, /* {{{ */
493                 oconfig_item_t *ci)
494 {
495         char *string;
496
497         if ((ci->values_num != 1)
498                         || (ci->values[0].type != OCONFIG_TYPE_STRING))
499         {
500                 WARNING ("write_http plugin: The `%s' config option "
501                                 "needs exactly one string argument.", ci->key);
502                 return (-1);
503         }
504
505         string = ci->values[0].value.string;
506         if (strcasecmp ("Command", string) == 0)
507                 cb->format = WH_FORMAT_COMMAND;
508         else if (strcasecmp ("JSON", string) == 0)
509                 cb->format = WH_FORMAT_JSON;
510         else
511         {
512                 ERROR ("write_http plugin: Invalid format string: %s",
513                                 string);
514                 return (-1);
515         }
516
517         return (0);
518 } /* }}} int config_set_format */
519
520 static int wh_config_node (oconfig_item_t *ci) /* {{{ */
521 {
522         wh_callback_t *cb;
523         int buffer_size = 0;
524         user_data_t user_data;
525         char callback_name[DATA_MAX_NAME_LEN];
526         int i;
527
528         cb = malloc (sizeof (*cb));
529         if (cb == NULL)
530         {
531                 ERROR ("write_http plugin: malloc failed.");
532                 return (-1);
533         }
534         memset (cb, 0, sizeof (*cb));
535         cb->verify_peer = 1;
536         cb->verify_host = 1;
537         cb->format = WH_FORMAT_COMMAND;
538         cb->sslversion = CURL_SSLVERSION_DEFAULT;
539         cb->low_speed_limit = 0;
540         cb->timeout = 0;
541
542         pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
543
544         cf_util_get_string (ci, &cb->name);
545
546         /* FIXME: Remove this legacy mode in version 6. */
547         if (strcasecmp ("URL", ci->key) == 0)
548                 cf_util_get_string (ci, &cb->location);
549
550         for (i = 0; i < ci->children_num; i++)
551         {
552                 oconfig_item_t *child = ci->children + i;
553
554                 if (strcasecmp ("URL", child->key) == 0)
555                         cf_util_get_string (child, &cb->location);
556                 else if (strcasecmp ("User", child->key) == 0)
557                         cf_util_get_string (child, &cb->user);
558                 else if (strcasecmp ("Password", child->key) == 0)
559                         cf_util_get_string (child, &cb->pass);
560                 else if (strcasecmp ("VerifyPeer", child->key) == 0)
561                         cf_util_get_boolean (child, &cb->verify_peer);
562                 else if (strcasecmp ("VerifyHost", child->key) == 0)
563                         cf_util_get_boolean (child, &cb->verify_host);
564                 else if (strcasecmp ("CACert", child->key) == 0)
565                         cf_util_get_string (child, &cb->cacert);
566                 else if (strcasecmp ("CAPath", child->key) == 0)
567                         cf_util_get_string (child, &cb->capath);
568                 else if (strcasecmp ("ClientKey", child->key) == 0)
569                         cf_util_get_string (child, &cb->clientkey);
570                 else if (strcasecmp ("ClientCert", child->key) == 0)
571                         cf_util_get_string (child, &cb->clientcert);
572                 else if (strcasecmp ("ClientKeyPass", child->key) == 0)
573                         cf_util_get_string (child, &cb->clientkeypass);
574                 else if (strcasecmp ("SSLVersion", child->key) == 0)
575                 {
576                         char *value = NULL;
577
578                         cf_util_get_string (child, &value);
579
580                         if (value == NULL || strcasecmp ("default", value) == 0)
581                                 cb->sslversion = CURL_SSLVERSION_DEFAULT;
582                         else if (strcasecmp ("SSLv2", value) == 0)
583                                 cb->sslversion = CURL_SSLVERSION_SSLv2;
584                         else if (strcasecmp ("SSLv3", value) == 0)
585                                 cb->sslversion = CURL_SSLVERSION_SSLv3;
586                         else if (strcasecmp ("TLSv1", value) == 0)
587                                 cb->sslversion = CURL_SSLVERSION_TLSv1;
588 #if (LIBCURL_VERSION_MAJOR > 7) || (LIBCURL_VERSION_MAJOR == 7 && LIBCURL_VERSION_MINOR >= 34)
589                         else if (strcasecmp ("TLSv1_0", value) == 0)
590                                 cb->sslversion = CURL_SSLVERSION_TLSv1_0;
591                         else if (strcasecmp ("TLSv1_1", value) == 0)
592                                 cb->sslversion = CURL_SSLVERSION_TLSv1_1;
593                         else if (strcasecmp ("TLSv1_2", value) == 0)
594                                 cb->sslversion = CURL_SSLVERSION_TLSv1_2;
595 #endif
596                         else
597                                 ERROR ("write_http plugin: Invalid SSLVersion "
598                                                 "option: %s.", value);
599
600                         sfree(value);
601                 }
602                 else if (strcasecmp ("Format", child->key) == 0)
603                         config_set_format (cb, child);
604                 else if (strcasecmp ("StoreRates", child->key) == 0)
605                         cf_util_get_boolean (child, &cb->store_rates);
606                 else if (strcasecmp ("BufferSize", child->key) == 0)
607                         cf_util_get_int (child, &buffer_size);
608                 else if (strcasecmp ("LowSpeedLimit", child->key) == 0)
609                         cf_util_get_int (child, &cb->low_speed_limit);
610                 else if (strcasecmp ("Timeout", child->key) == 0)
611                         cf_util_get_int (child, &cb->timeout);
612                 else
613                 {
614                         ERROR ("write_http plugin: Invalid configuration "
615                                         "option: %s.", child->key);
616                 }
617         }
618
619         if (cb->location == NULL)
620         {
621                 ERROR ("write_http plugin: no URL defined for instance '%s'",
622                         cb->name);
623                 wh_callback_free (cb);
624                 return (-1);
625         }
626
627         if (cb->low_speed_limit > 0)
628                 cb->low_speed_time = CDTIME_T_TO_TIME_T(plugin_get_interval());
629
630         /* Determine send_buffer_size. */
631         cb->send_buffer_size = WRITE_HTTP_DEFAULT_BUFFER_SIZE;
632         if (buffer_size >= 1024)
633                 cb->send_buffer_size = (size_t) buffer_size;
634         else if (buffer_size != 0)
635                 ERROR ("write_http plugin: Ignoring invalid BufferSize setting (%d).",
636                                 buffer_size);
637
638         /* Allocate the buffer. */
639         cb->send_buffer = malloc (cb->send_buffer_size);
640         if (cb->send_buffer == NULL)
641         {
642                 ERROR ("write_http plugin: malloc(%zu) failed.", cb->send_buffer_size);
643                 wh_callback_free (cb);
644                 return (-1);
645         }
646         /* Nulls the buffer and sets ..._free and ..._fill. */
647         wh_reset_buffer (cb);
648
649         ssnprintf (callback_name, sizeof (callback_name), "write_http/%s",
650                         cb->name);
651         DEBUG ("write_http: Registering write callback '%s' with URL '%s'",
652                         callback_name, cb->location);
653
654         memset (&user_data, 0, sizeof (user_data));
655         user_data.data = cb;
656         user_data.free_func = NULL;
657         plugin_register_flush (callback_name, wh_flush, &user_data);
658
659         user_data.free_func = wh_callback_free;
660         plugin_register_write (callback_name, wh_write, &user_data);
661
662         return (0);
663 } /* }}} int wh_config_node */
664
665 static int wh_config (oconfig_item_t *ci) /* {{{ */
666 {
667         int i;
668
669         for (i = 0; i < ci->children_num; i++)
670         {
671                 oconfig_item_t *child = ci->children + i;
672
673                 if (strcasecmp ("Node", child->key) == 0)
674                         wh_config_node (child);
675                 /* FIXME: Remove this legacy mode in version 6. */
676                 else if (strcasecmp ("URL", child->key) == 0) {
677                         WARNING ("write_http plugin: Legacy <URL> block found. "
678                                 "Please use <Node> instead.");
679                         wh_config_node (child);
680                 }
681                 else
682                 {
683                         ERROR ("write_http plugin: Invalid configuration "
684                                         "option: %s.", child->key);
685                 }
686         }
687
688         return (0);
689 } /* }}} int wh_config */
690
691 static int wh_init (void) /* {{{ */
692 {
693         /* Call this while collectd is still single-threaded to avoid
694          * initialization issues in libgcrypt. */
695         curl_global_init (CURL_GLOBAL_SSL);
696         return (0);
697 } /* }}} int wh_init */
698
699 void module_register (void) /* {{{ */
700 {
701         plugin_register_complex_config ("write_http", wh_config);
702         plugin_register_init ("write_http", wh_init);
703 } /* }}} void module_register */
704
705 /* vim: set fdm=marker sw=8 ts=8 tw=78 et : */