1 /**
2 * collectd - src/curl_json.c
3 * Copyright (C) 2009 Doug MacEachern
4 * Copyright (C) 2006-2013 Florian octo Forster
5 *
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.
9 *
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.
14 *
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
18 *
19 * Authors:
20 * Doug MacEachern <dougm at hyperic.com>
21 * Florian octo Forster <octo at collectd.org>
22 **/
24 #include "collectd.h"
26 #include "common.h"
27 #include "plugin.h"
28 #include "utils_avltree.h"
29 #include "utils_complain.h"
30 #include "utils_curl_stats.h"
32 #include <sys/types.h>
33 #include <sys/un.h>
35 #include <curl/curl.h>
37 #include <yajl/yajl_parse.h>
38 #if HAVE_YAJL_YAJL_VERSION_H
39 # include <yajl/yajl_version.h>
40 #endif
42 #if defined(YAJL_MAJOR) && (YAJL_MAJOR > 1)
43 # define HAVE_YAJL_V2 1
44 #endif
46 #define CJ_DEFAULT_HOST "localhost"
47 #define CJ_KEY_MAGIC 0x43484b59UL /* CHKY */
48 #define CJ_IS_KEY(key) ((key)->magic == CJ_KEY_MAGIC)
49 #define CJ_ANY "*"
50 #define COUCH_MIN(x,y) ((x) < (y) ? (x) : (y))
52 struct cj_key_s;
53 typedef struct cj_key_s cj_key_t;
54 struct cj_key_s /* {{{ */
55 {
56 unsigned long magic;
57 char *path;
58 char *type;
59 char *instance;
60 };
61 /* }}} */
63 struct cj_s /* {{{ */
64 {
65 char *instance;
66 char *host;
68 char *sock;
70 char *url;
71 char *user;
72 char *pass;
73 char *credentials;
74 _Bool digest;
75 _Bool verify_peer;
76 _Bool verify_host;
77 char *cacert;
78 struct curl_slist *headers;
79 char *post_body;
80 cdtime_t interval;
81 int timeout;
82 curl_stats_t *stats;
84 CURL *curl;
85 char curl_errbuf[CURL_ERROR_SIZE];
87 yajl_handle yajl;
88 c_avl_tree_t *tree;
89 cj_key_t *key;
90 int depth;
91 struct {
92 union {
93 c_avl_tree_t *tree;
94 cj_key_t *key;
95 };
96 _Bool in_array;
97 int index;
98 char name[DATA_MAX_NAME_LEN];
99 } state[YAJL_MAX_DEPTH];
100 };
101 typedef struct cj_s cj_t; /* }}} */
103 #if HAVE_YAJL_V2
104 typedef size_t yajl_len_t;
105 #else
106 typedef unsigned int yajl_len_t;
107 #endif
109 static int cj_read (user_data_t *ud);
110 static void cj_submit (cj_t *db, cj_key_t *key, value_t *value);
112 static size_t cj_curl_callback (void *buf, /* {{{ */
113 size_t size, size_t nmemb, void *user_data)
114 {
115 cj_t *db;
116 size_t len;
117 yajl_status status;
119 len = size * nmemb;
121 if (len == 0)
122 return (len);
124 db = user_data;
125 if (db == NULL)
126 return (0);
128 status = yajl_parse(db->yajl, (unsigned char *)buf, len);
129 if (status == yajl_status_ok)
130 return (len);
131 #if !HAVE_YAJL_V2
132 else if (status == yajl_status_insufficient_data)
133 return (len);
134 #endif
136 unsigned char *msg = yajl_get_error(db->yajl, /* verbose = */ 1,
137 /* jsonText = */ (unsigned char *) buf, (unsigned int) len);
138 ERROR ("curl_json plugin: yajl_parse failed: %s", msg);
139 yajl_free_error(db->yajl, msg);
140 return (0); /* abort write callback */
141 } /* }}} size_t cj_curl_callback */
143 static int cj_get_type (cj_key_t *key)
144 {
145 const data_set_t *ds;
147 ds = plugin_get_ds (key->type);
148 if (ds == NULL)
149 {
150 static char type[DATA_MAX_NAME_LEN] = "!!!invalid!!!";
152 assert (key->type != NULL);
153 if (strcmp (type, key->type) != 0)
154 {
155 ERROR ("curl_json plugin: Unable to look up DS type \"%s\".",
156 key->type);
157 sstrncpy (type, key->type, sizeof (type));
158 }
160 return -1;
161 }
162 else if (ds->ds_num > 1)
163 {
164 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
166 c_complain_once (LOG_WARNING, &complaint,
167 "curl_json plugin: The type \"%s\" has more than one data source. "
168 "This is currently not supported. I will return the type of the "
169 "first data source, but this will likely lead to problems later on.",
170 key->type);
171 }
173 return ds->ds[0].type;
174 }
176 static int cj_cb_map_key (void *ctx, const unsigned char *val,
177 yajl_len_t len);
179 static void cj_cb_inc_array_index (void *ctx, _Bool update_key)
180 {
181 cj_t *db = (cj_t *)ctx;
183 if (!db->state[db->depth].in_array)
184 return;
186 db->state[db->depth].index++;
188 if (update_key)
189 {
190 char name[DATA_MAX_NAME_LEN];
192 ssnprintf (name, sizeof (name), "%d", db->state[db->depth].index - 1);
194 cj_cb_map_key (ctx, (unsigned char *)name, (yajl_len_t) strlen (name));
195 }
196 }
198 /* yajl callbacks */
199 #define CJ_CB_ABORT 0
200 #define CJ_CB_CONTINUE 1
202 static int cj_cb_boolean (void * ctx, int boolVal)
203 {
204 cj_cb_inc_array_index (ctx, /* update_key = */ 0);
205 return (CJ_CB_CONTINUE);
206 }
208 static int cj_cb_null (void * ctx)
209 {
210 cj_cb_inc_array_index (ctx, /* update_key = */ 0);
211 return (CJ_CB_CONTINUE);
212 }
214 static int cj_cb_number (void *ctx,
215 const char *number, yajl_len_t number_len)
216 {
217 char buffer[number_len + 1];
219 cj_t *db = (cj_t *)ctx;
220 cj_key_t *key = db->state[db->depth].key;
221 value_t vt;
222 int type;
223 int status;
225 /* Create a null-terminated version of the string. */
226 memcpy (buffer, number, number_len);
227 buffer[sizeof (buffer) - 1] = 0;
229 if ((key == NULL) || !CJ_IS_KEY (key)) {
230 if (key != NULL && !db->state[db->depth].in_array/*can be inhomogeneous*/)
231 NOTICE ("curl_json plugin: Found \"%s\", but the configuration expects"
232 " a map.", buffer);
233 cj_cb_inc_array_index (ctx, /* update_key = */ 1);
234 key = db->state[db->depth].key;
235 if (key == NULL) {
236 return (CJ_CB_CONTINUE);
237 }
238 }
239 else
240 {
241 cj_cb_inc_array_index (ctx, /* update_key = */ 1);
242 }
244 type = cj_get_type (key);
245 status = parse_value (buffer, &vt, type);
246 if (status != 0)
247 {
248 NOTICE ("curl_json plugin: Unable to parse number: \"%s\"", buffer);
249 return (CJ_CB_CONTINUE);
250 }
252 cj_submit (db, key, &vt);
253 return (CJ_CB_CONTINUE);
254 } /* int cj_cb_number */
256 /* Queries the key-tree of the parent context for "in_name" and, if found,
257 * updates the "key" field of the current context. Otherwise, "key" is set to
258 * NULL. */
259 static int cj_cb_map_key (void *ctx,
260 unsigned char const *in_name, yajl_len_t in_name_len)
261 {
262 cj_t *db = (cj_t *)ctx;
263 c_avl_tree_t *tree;
265 tree = db->state[db->depth-1].tree;
267 if (tree != NULL)
268 {
269 cj_key_t *value = NULL;
270 char *name;
271 size_t name_len;
273 /* Create a null-terminated version of the name. */
274 name = db->state[db->depth].name;
275 name_len = COUCH_MIN ((size_t) in_name_len,
276 sizeof (db->state[db->depth].name) - 1);
277 memcpy (name, in_name, name_len);
278 name[name_len] = 0;
280 if (c_avl_get (tree, name, (void *) &value) == 0) {
281 if (CJ_IS_KEY((cj_key_t*)value)) {
282 db->state[db->depth].key = value;
283 }
284 else {
285 db->state[db->depth].tree = (c_avl_tree_t*) value;
286 }
287 }
288 else if (c_avl_get (tree, CJ_ANY, (void *) &value) == 0)
289 if (CJ_IS_KEY((cj_key_t*)value)) {
290 db->state[db->depth].key = value;
291 }
292 else {
293 db->state[db->depth].tree = (c_avl_tree_t*) value;
294 }
295 else
296 db->state[db->depth].key = NULL;
297 }
299 return (CJ_CB_CONTINUE);
300 }
302 static int cj_cb_string (void *ctx, const unsigned char *val,
303 yajl_len_t len)
304 {
305 /* Handle the string as if it was a number. */
306 return (cj_cb_number (ctx, (const char *) val, len));
307 } /* int cj_cb_string */
309 static int cj_cb_start (void *ctx)
310 {
311 cj_t *db = (cj_t *)ctx;
312 if (++db->depth >= YAJL_MAX_DEPTH)
313 {
314 ERROR ("curl_json plugin: %s depth exceeds max, aborting.",
315 db->url ? db->url : db->sock);
316 return (CJ_CB_ABORT);
317 }
318 return (CJ_CB_CONTINUE);
319 }
321 static int cj_cb_end (void *ctx)
322 {
323 cj_t *db = (cj_t *)ctx;
324 db->state[db->depth].tree = NULL;
325 --db->depth;
326 return (CJ_CB_CONTINUE);
327 }
329 static int cj_cb_start_map (void *ctx)
330 {
331 cj_cb_inc_array_index (ctx, /* update_key = */ 1);
332 return cj_cb_start (ctx);
333 }
335 static int cj_cb_end_map (void *ctx)
336 {
337 return cj_cb_end (ctx);
338 }
340 static int cj_cb_start_array (void * ctx)
341 {
342 cj_t *db = (cj_t *)ctx;
343 cj_cb_inc_array_index (ctx, /* update_key = */ 1);
344 if (db->depth+1 < YAJL_MAX_DEPTH) {
345 db->state[db->depth+1].in_array = 1;
346 db->state[db->depth+1].index = 0;
347 }
348 return cj_cb_start (ctx);
349 }
351 static int cj_cb_end_array (void * ctx)
352 {
353 cj_t *db = (cj_t *)ctx;
354 db->state[db->depth].in_array = 0;
355 return cj_cb_end (ctx);
356 }
358 static yajl_callbacks ycallbacks = {
359 cj_cb_null, /* null */
360 cj_cb_boolean, /* boolean */
361 NULL, /* integer */
362 NULL, /* double */
363 cj_cb_number,
364 cj_cb_string,
365 cj_cb_start_map,
366 cj_cb_map_key,
367 cj_cb_end_map,
368 cj_cb_start_array,
369 cj_cb_end_array
370 };
372 /* end yajl callbacks */
374 static void cj_key_free (cj_key_t *key) /* {{{ */
375 {
376 if (key == NULL)
377 return;
379 sfree (key->path);
380 sfree (key->type);
381 sfree (key->instance);
383 sfree (key);
384 } /* }}} void cj_key_free */
386 static void cj_tree_free (c_avl_tree_t *tree) /* {{{ */
387 {
388 char *name;
389 void *value;
391 while (c_avl_pick (tree, (void *) &name, (void *) &value) == 0)
392 {
393 cj_key_t *key = (cj_key_t *)value;
395 if (CJ_IS_KEY(key))
396 cj_key_free (key);
397 else
398 cj_tree_free ((c_avl_tree_t *)value);
400 sfree (name);
401 }
403 c_avl_destroy (tree);
404 } /* }}} void cj_tree_free */
406 static void cj_free (void *arg) /* {{{ */
407 {
408 cj_t *db;
410 DEBUG ("curl_json plugin: cj_free (arg = %p);", arg);
412 db = (cj_t *) arg;
414 if (db == NULL)
415 return;
417 if (db->curl != NULL)
418 curl_easy_cleanup (db->curl);
419 db->curl = NULL;
421 if (db->tree != NULL)
422 cj_tree_free (db->tree);
423 db->tree = NULL;
425 sfree (db->instance);
426 sfree (db->host);
428 sfree (db->sock);
430 sfree (db->url);
431 sfree (db->user);
432 sfree (db->pass);
433 sfree (db->credentials);
434 sfree (db->cacert);
435 sfree (db->post_body);
436 curl_slist_free_all (db->headers);
437 curl_stats_destroy (db->stats);
439 sfree (db);
440 } /* }}} void cj_free */
442 /* Configuration handling functions {{{ */
444 static c_avl_tree_t *cj_avl_create(void)
445 {
446 return c_avl_create ((int (*) (const void *, const void *)) strcmp);
447 }
449 static int cj_config_append_string (const char *name, struct curl_slist **dest, /* {{{ */
450 oconfig_item_t *ci)
451 {
452 struct curl_slist *temp = NULL;
453 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
454 {
455 WARNING ("curl_json plugin: `%s' needs exactly one string argument.", name);
456 return (-1);
457 }
459 temp = curl_slist_append(*dest, ci->values[0].value.string);
460 if (temp == NULL)
461 return (-1);
463 *dest = temp;
465 return (0);
466 } /* }}} int cj_config_append_string */
468 static int cj_config_add_key (cj_t *db, /* {{{ */
469 oconfig_item_t *ci)
470 {
471 cj_key_t *key;
472 int status;
474 if ((ci->values_num != 1)
475 || (ci->values[0].type != OCONFIG_TYPE_STRING))
476 {
477 WARNING ("curl_json plugin: The `Key' block "
478 "needs exactly one string argument.");
479 return (-1);
480 }
482 key = calloc (1, sizeof (*key));
483 if (key == NULL)
484 {
485 ERROR ("curl_json plugin: calloc failed.");
486 return (-1);
487 }
488 key->magic = CJ_KEY_MAGIC;
490 if (strcasecmp ("Key", ci->key) == 0)
491 {
492 status = cf_util_get_string (ci, &key->path);
493 if (status != 0)
494 {
495 sfree (key);
496 return (status);
497 }
498 }
499 else
500 {
501 ERROR ("curl_json plugin: cj_config: "
502 "Invalid key: %s", ci->key);
503 cj_key_free (key);
504 return (-1);
505 }
507 status = 0;
508 for (int i = 0; i < ci->children_num; i++)
509 {
510 oconfig_item_t *child = ci->children + i;
512 if (strcasecmp ("Type", child->key) == 0)
513 status = cf_util_get_string (child, &key->type);
514 else if (strcasecmp ("Instance", child->key) == 0)
515 status = cf_util_get_string (child, &key->instance);
516 else
517 {
518 WARNING ("curl_json plugin: Option `%s' not allowed here.", child->key);
519 status = -1;
520 }
522 if (status != 0)
523 break;
524 } /* for (i = 0; i < ci->children_num; i++) */
526 if (status != 0)
527 {
528 cj_key_free (key);
529 return (-1);
530 }
532 if (key->type == NULL)
533 {
534 WARNING ("curl_json plugin: `Type' missing in `Key' block.");
535 cj_key_free (key);
536 return (-1);
537 }
539 /* store path in a tree that will match the json map structure, example:
540 * "httpd/requests/count",
541 * "httpd/requests/current" ->
542 * { "httpd": { "requests": { "count": $key, "current": $key } } }
543 */
544 char *ptr;
545 char *name;
546 c_avl_tree_t *tree;
548 if (db->tree == NULL)
549 db->tree = cj_avl_create();
551 tree = db->tree;
552 ptr = key->path;
553 if (*ptr == '/')
554 ++ptr;
556 name = ptr;
557 while ((ptr = strchr (name, '/')) != NULL)
558 {
559 char ent[PATH_MAX];
560 c_avl_tree_t *value;
561 size_t len;
563 len = ptr - name;
564 if (len == 0)
565 break;
567 len = COUCH_MIN(len, sizeof (ent)-1);
568 sstrncpy (ent, name, len+1);
570 if (c_avl_get (tree, ent, (void *) &value) != 0)
571 {
572 value = cj_avl_create ();
573 c_avl_insert (tree, strdup (ent), value);
574 }
576 tree = value;
577 name = ptr + 1;
578 }
580 if (strlen (name) == 0)
581 {
582 ERROR ("curl_json plugin: invalid key: %s", key->path);
583 cj_key_free (key);
584 return (-1);
585 }
587 c_avl_insert (tree, strdup (name), key);
588 return (status);
589 } /* }}} int cj_config_add_key */
591 static int cj_init_curl (cj_t *db) /* {{{ */
592 {
593 db->curl = curl_easy_init ();
594 if (db->curl == NULL)
595 {
596 ERROR ("curl_json plugin: curl_easy_init failed.");
597 return (-1);
598 }
600 curl_easy_setopt (db->curl, CURLOPT_NOSIGNAL, 1L);
601 curl_easy_setopt (db->curl, CURLOPT_WRITEFUNCTION, cj_curl_callback);
602 curl_easy_setopt (db->curl, CURLOPT_WRITEDATA, db);
603 curl_easy_setopt (db->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
604 curl_easy_setopt (db->curl, CURLOPT_ERRORBUFFER, db->curl_errbuf);
605 curl_easy_setopt (db->curl, CURLOPT_URL, db->url);
606 curl_easy_setopt (db->curl, CURLOPT_FOLLOWLOCATION, 1L);
607 curl_easy_setopt (db->curl, CURLOPT_MAXREDIRS, 50L);
609 if (db->user != NULL)
610 {
611 #ifdef HAVE_CURLOPT_USERNAME
612 curl_easy_setopt (db->curl, CURLOPT_USERNAME, db->user);
613 curl_easy_setopt (db->curl, CURLOPT_PASSWORD,
614 (db->pass == NULL) ? "" : db->pass);
615 #else
616 size_t credentials_size;
618 credentials_size = strlen (db->user) + 2;
619 if (db->pass != NULL)
620 credentials_size += strlen (db->pass);
622 db->credentials = malloc (credentials_size);
623 if (db->credentials == NULL)
624 {
625 ERROR ("curl_json plugin: malloc failed.");
626 return (-1);
627 }
629 ssnprintf (db->credentials, credentials_size, "%s:%s",
630 db->user, (db->pass == NULL) ? "" : db->pass);
631 curl_easy_setopt (db->curl, CURLOPT_USERPWD, db->credentials);
632 #endif
634 if (db->digest)
635 curl_easy_setopt (db->curl, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
636 }
638 curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYPEER, (long) db->verify_peer);
639 curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYHOST,
640 db->verify_host ? 2L : 0L);
641 if (db->cacert != NULL)
642 curl_easy_setopt (db->curl, CURLOPT_CAINFO, db->cacert);
643 if (db->headers != NULL)
644 curl_easy_setopt (db->curl, CURLOPT_HTTPHEADER, db->headers);
645 if (db->post_body != NULL)
646 curl_easy_setopt (db->curl, CURLOPT_POSTFIELDS, db->post_body);
648 #ifdef HAVE_CURLOPT_TIMEOUT_MS
649 if (db->timeout >= 0)
650 curl_easy_setopt (db->curl, CURLOPT_TIMEOUT_MS, (long) db->timeout);
651 else if (db->interval > 0)
652 curl_easy_setopt (db->curl, CURLOPT_TIMEOUT_MS, (long) CDTIME_T_TO_MS(db->timeout));
653 else
654 curl_easy_setopt (db->curl, CURLOPT_TIMEOUT_MS, (long) CDTIME_T_TO_MS(plugin_get_interval()));
655 #endif
657 return (0);
658 } /* }}} int cj_init_curl */
660 static int cj_config_add_url (oconfig_item_t *ci) /* {{{ */
661 {
662 cj_t *db;
663 int status = 0;
665 if ((ci->values_num != 1)
666 || (ci->values[0].type != OCONFIG_TYPE_STRING))
667 {
668 WARNING ("curl_json plugin: The `URL' block "
669 "needs exactly one string argument.");
670 return (-1);
671 }
673 db = calloc (1, sizeof (*db));
674 if (db == NULL)
675 {
676 ERROR ("curl_json plugin: calloc failed.");
677 return (-1);
678 }
680 db->timeout = -1;
682 if (strcasecmp ("URL", ci->key) == 0)
683 status = cf_util_get_string (ci, &db->url);
684 else if (strcasecmp ("Sock", ci->key) == 0)
685 status = cf_util_get_string (ci, &db->sock);
686 else
687 {
688 ERROR ("curl_json plugin: cj_config: "
689 "Invalid key: %s", ci->key);
690 cj_free (db);
691 return (-1);
692 }
693 if (status != 0)
694 {
695 sfree (db);
696 return (status);
697 }
699 /* Fill the `cj_t' structure.. */
700 for (int i = 0; i < ci->children_num; i++)
701 {
702 oconfig_item_t *child = ci->children + i;
704 if (strcasecmp ("Instance", child->key) == 0)
705 status = cf_util_get_string (child, &db->instance);
706 else if (strcasecmp ("Host", child->key) == 0)
707 status = cf_util_get_string (child, &db->host);
708 else if (db->url && strcasecmp ("User", child->key) == 0)
709 status = cf_util_get_string (child, &db->user);
710 else if (db->url && strcasecmp ("Password", child->key) == 0)
711 status = cf_util_get_string (child, &db->pass);
712 else if (strcasecmp ("Digest", child->key) == 0)
713 status = cf_util_get_boolean (child, &db->digest);
714 else if (db->url && strcasecmp ("VerifyPeer", child->key) == 0)
715 status = cf_util_get_boolean (child, &db->verify_peer);
716 else if (db->url && strcasecmp ("VerifyHost", child->key) == 0)
717 status = cf_util_get_boolean (child, &db->verify_host);
718 else if (db->url && strcasecmp ("CACert", child->key) == 0)
719 status = cf_util_get_string (child, &db->cacert);
720 else if (db->url && strcasecmp ("Header", child->key) == 0)
721 status = cj_config_append_string ("Header", &db->headers, child);
722 else if (db->url && strcasecmp ("Post", child->key) == 0)
723 status = cf_util_get_string (child, &db->post_body);
724 else if (strcasecmp ("Key", child->key) == 0)
725 status = cj_config_add_key (db, child);
726 else if (strcasecmp ("Interval", child->key) == 0)
727 status = cf_util_get_cdtime(child, &db->interval);
728 else if (strcasecmp ("Timeout", child->key) == 0)
729 status = cf_util_get_int (child, &db->timeout);
730 else if (strcasecmp ("Statistics", child->key) == 0)
731 {
732 db->stats = curl_stats_from_config (child);
733 if (db->stats == NULL)
734 status = -1;
735 }
736 else
737 {
738 WARNING ("curl_json plugin: Option `%s' not allowed here.", child->key);
739 status = -1;
740 }
742 if (status != 0)
743 break;
744 }
746 if (status == 0)
747 {
748 if (db->tree == NULL)
749 {
750 WARNING ("curl_json plugin: No (valid) `Key' block within `%s' \"`%s'\".",
751 db->url ? "URL" : "Sock", db->url ? db->url : db->sock);
752 status = -1;
753 }
754 if (status == 0 && db->url)
755 status = cj_init_curl (db);
756 }
758 /* If all went well, register this database for reading */
759 if (status == 0)
760 {
761 char *cb_name;
763 if (db->instance == NULL)
764 db->instance = strdup("default");
766 DEBUG ("curl_json plugin: Registering new read callback: %s",
767 db->instance);
769 cb_name = ssnprintf_alloc ("curl_json-%s-%s",
770 db->instance, db->url ? db->url : db->sock);
772 user_data_t ud = {
773 .data = db,
774 .free_func = cj_free
775 };
777 plugin_register_complex_read (/* group = */ NULL, cb_name, cj_read,
778 /* interval = */ db->interval,
779 &ud);
780 sfree (cb_name);
781 }
782 else
783 {
784 cj_free (db);
785 return (-1);
786 }
788 return (0);
789 }
790 /* }}} int cj_config_add_database */
792 static int cj_config (oconfig_item_t *ci) /* {{{ */
793 {
794 int success;
795 int errors;
796 int status;
798 success = 0;
799 errors = 0;
801 for (int i = 0; i < ci->children_num; i++)
802 {
803 oconfig_item_t *child = ci->children + i;
805 if (strcasecmp ("Sock", child->key) == 0
806 || strcasecmp ("URL", child->key) == 0)
807 {
808 status = cj_config_add_url (child);
809 if (status == 0)
810 success++;
811 else
812 errors++;
813 }
814 else
815 {
816 WARNING ("curl_json plugin: Option `%s' not allowed here.", child->key);
817 errors++;
818 }
819 }
821 if ((success == 0) && (errors > 0))
822 {
823 ERROR ("curl_json plugin: All statements failed.");
824 return (-1);
825 }
827 return (0);
828 } /* }}} int cj_config */
830 /* }}} End of configuration handling functions */
832 static const char *cj_host (cj_t *db) /* {{{ */
833 {
834 if ((db->host == NULL)
835 || (strcmp ("", db->host) == 0)
836 || (strcmp (CJ_DEFAULT_HOST, db->host) == 0))
837 return hostname_g;
838 return db->host;
839 } /* }}} cj_host */
841 static void cj_submit (cj_t *db, cj_key_t *key, value_t *value) /* {{{ */
842 {
843 value_list_t vl = VALUE_LIST_INIT;
845 vl.values = value;
846 vl.values_len = 1;
848 if (key->instance == NULL)
849 {
850 int len = 0;
851 for (int i = 0; i < db->depth; i++)
852 len += ssnprintf(vl.type_instance+len, sizeof(vl.type_instance)-len,
853 i ? "-%s" : "%s", db->state[i+1].name);
854 }
855 else
856 sstrncpy (vl.type_instance, key->instance, sizeof (vl.type_instance));
858 sstrncpy (vl.host, cj_host (db), sizeof (vl.host));
859 sstrncpy (vl.plugin, "curl_json", sizeof (vl.plugin));
860 sstrncpy (vl.plugin_instance, db->instance, sizeof (vl.plugin_instance));
861 sstrncpy (vl.type, key->type, sizeof (vl.type));
863 if (db->interval > 0)
864 vl.interval = db->interval;
866 plugin_dispatch_values (&vl);
867 } /* }}} int cj_submit */
869 static int cj_sock_perform (cj_t *db) /* {{{ */
870 {
871 char errbuf[1024];
872 struct sockaddr_un sa_unix = { 0 };
873 sa_unix.sun_family = AF_UNIX;
874 sstrncpy (sa_unix.sun_path, db->sock, sizeof (sa_unix.sun_path));
876 int fd = socket (AF_UNIX, SOCK_STREAM, 0);
877 if (fd < 0)
878 return (-1);
879 if (connect (fd, (struct sockaddr *)&sa_unix, sizeof(sa_unix)) < 0)
880 {
881 ERROR ("curl_json plugin: connect(%s) failed: %s",
882 (db->sock != NULL) ? db->sock : "<null>",
883 sstrerror(errno, errbuf, sizeof (errbuf)));
884 close (fd);
885 return (-1);
886 }
888 ssize_t red;
889 do {
890 unsigned char buffer[4096];
891 red = read (fd, buffer, sizeof(buffer));
892 if (red < 0) {
893 ERROR ("curl_json plugin: read(%s) failed: %s",
894 (db->sock != NULL) ? db->sock : "<null>",
895 sstrerror(errno, errbuf, sizeof (errbuf)));
896 close (fd);
897 return (-1);
898 }
899 if (!cj_curl_callback (buffer, red, 1, db))
900 break;
901 } while (red > 0);
902 close (fd);
903 return (0);
904 } /* }}} int cj_sock_perform */
907 static int cj_curl_perform(cj_t *db) /* {{{ */
908 {
909 int status;
910 long rc;
911 char *url;
912 url = db->url;
914 status = curl_easy_perform (db->curl);
915 if (status != CURLE_OK)
916 {
917 ERROR ("curl_json plugin: curl_easy_perform failed with status %i: %s (%s)",
918 status, db->curl_errbuf, url);
919 return (-1);
920 }
921 if (db->stats != NULL)
922 curl_stats_dispatch (db->stats, db->curl, cj_host (db), "curl_json", db->instance);
924 curl_easy_getinfo(db->curl, CURLINFO_EFFECTIVE_URL, &url);
925 curl_easy_getinfo(db->curl, CURLINFO_RESPONSE_CODE, &rc);
927 /* The response code is zero if a non-HTTP transport was used. */
928 if ((rc != 0) && (rc != 200))
929 {
930 ERROR ("curl_json plugin: curl_easy_perform failed with "
931 "response code %ld (%s)", rc, url);
932 return (-1);
933 }
934 return (0);
935 } /* }}} int cj_curl_perform */
937 static int cj_perform (cj_t *db) /* {{{ */
938 {
939 int status;
940 yajl_handle yprev = db->yajl;
942 db->yajl = yajl_alloc (&ycallbacks,
943 #if HAVE_YAJL_V2
944 /* alloc funcs = */ NULL,
945 #else
946 /* alloc funcs = */ NULL, NULL,
947 #endif
948 /* context = */ (void *)db);
949 if (db->yajl == NULL)
950 {
951 ERROR ("curl_json plugin: yajl_alloc failed.");
952 db->yajl = yprev;
953 return (-1);
954 }
956 if (db->url)
957 status = cj_curl_perform (db);
958 else
959 status = cj_sock_perform (db);
960 if (status < 0)
961 {
962 yajl_free (db->yajl);
963 db->yajl = yprev;
964 return (-1);
965 }
967 #if HAVE_YAJL_V2
968 status = yajl_complete_parse(db->yajl);
969 #else
970 status = yajl_parse_complete(db->yajl);
971 #endif
972 if (status != yajl_status_ok)
973 {
974 unsigned char *errmsg;
976 errmsg = yajl_get_error (db->yajl, /* verbose = */ 0,
977 /* jsonText = */ NULL, /* jsonTextLen = */ 0);
978 ERROR ("curl_json plugin: yajl_parse_complete failed: %s",
979 (char *) errmsg);
980 yajl_free_error (db->yajl, errmsg);
981 yajl_free (db->yajl);
982 db->yajl = yprev;
983 return (-1);
984 }
986 yajl_free (db->yajl);
987 db->yajl = yprev;
988 return (0);
989 } /* }}} int cj_perform */
991 static int cj_read (user_data_t *ud) /* {{{ */
992 {
993 cj_t *db;
995 if ((ud == NULL) || (ud->data == NULL))
996 {
997 ERROR ("curl_json plugin: cj_read: Invalid user data.");
998 return (-1);
999 }
1001 db = (cj_t *) ud->data;
1003 db->depth = 0;
1004 memset (&db->state, 0, sizeof(db->state));
1005 db->state[db->depth].tree = db->tree;
1006 db->key = NULL;
1008 return cj_perform (db);
1009 } /* }}} int cj_read */
1011 static int cj_init (void) /* {{{ */
1012 {
1013 /* Call this while collectd is still single-threaded to avoid
1014 * initialization issues in libgcrypt. */
1015 curl_global_init (CURL_GLOBAL_SSL);
1016 return (0);
1017 } /* }}} int cj_init */
1019 void module_register (void)
1020 {
1021 plugin_register_complex_config ("curl_json", cj_config);
1022 plugin_register_init ("curl_json", cj_init);
1023 } /* void module_register */
1025 /* vim: set sw=2 sts=2 et fdm=marker : */