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"
25 #include "common.h"
26 #include "plugin.h"
27 #include "configfile.h"
28 #include "utils_avltree.h"
29 #include "utils_complain.h"
31 #include <sys/socket.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 char *path;
57 char *type;
58 char *instance;
59 unsigned long magic;
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 verify_peer;
75 _Bool verify_host;
76 char *cacert;
77 struct curl_slist *headers;
78 char *post_body;
80 CURL *curl;
81 char curl_errbuf[CURL_ERROR_SIZE];
83 yajl_handle yajl;
84 c_avl_tree_t *tree;
85 cj_key_t *key;
86 int depth;
87 struct {
88 union {
89 c_avl_tree_t *tree;
90 cj_key_t *key;
91 };
92 _Bool in_array;
93 int index;
94 char name[DATA_MAX_NAME_LEN];
95 } state[YAJL_MAX_DEPTH];
96 };
97 typedef struct cj_s cj_t; /* }}} */
99 #if HAVE_YAJL_V2
100 typedef size_t yajl_len_t;
101 #else
102 typedef unsigned int yajl_len_t;
103 #endif
105 static int cj_read (user_data_t *ud);
106 static void cj_submit (cj_t *db, cj_key_t *key, value_t *value);
108 static size_t cj_curl_callback (void *buf, /* {{{ */
109 size_t size, size_t nmemb, void *user_data)
110 {
111 cj_t *db;
112 size_t len;
113 yajl_status status;
115 len = size * nmemb;
117 if (len <= 0)
118 return (len);
120 db = user_data;
121 if (db == NULL)
122 return (0);
124 status = yajl_parse(db->yajl, (unsigned char *)buf, len);
125 if (status == yajl_status_ok)
126 return (len);
127 #if !HAVE_YAJL_V2
128 else if (status == yajl_status_insufficient_data)
129 return (len);
130 #endif
132 if (status != yajl_status_ok)
133 {
134 unsigned char *msg =
135 yajl_get_error(db->yajl, /* verbose = */ 1,
136 /* jsonText = */ (unsigned char *) buf, (unsigned int) len);
137 ERROR ("curl_json plugin: yajl_parse failed: %s", msg);
138 yajl_free_error(db->yajl, msg);
139 return (0); /* abort write callback */
140 }
142 return (len);
143 } /* }}} size_t cj_curl_callback */
145 static int cj_get_type (cj_key_t *key)
146 {
147 const data_set_t *ds;
149 ds = plugin_get_ds (key->type);
150 if (ds == NULL)
151 {
152 static char type[DATA_MAX_NAME_LEN] = "!!!invalid!!!";
154 assert (key->type != NULL);
155 if (strcmp (type, key->type) != 0)
156 {
157 ERROR ("curl_json plugin: Unable to look up DS type \"%s\".",
158 key->type);
159 sstrncpy (type, key->type, sizeof (type));
160 }
162 return -1;
163 }
164 else if (ds->ds_num > 1)
165 {
166 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
168 c_complain_once (LOG_WARNING, &complaint,
169 "curl_json plugin: The type \"%s\" has more than one data source. "
170 "This is currently not supported. I will return the type of the "
171 "first data source, but this will likely lead to problems later on.",
172 key->type);
173 }
175 return ds->ds[0].type;
176 }
178 static int cj_cb_map_key (void *ctx, const unsigned char *val,
179 yajl_len_t len);
181 static void cj_cb_inc_array_index (void *ctx, _Bool update_key)
182 {
183 cj_t *db = (cj_t *)ctx;
185 if (!db->state[db->depth].in_array)
186 return;
188 db->state[db->depth].index++;
190 if (update_key)
191 {
192 char name[DATA_MAX_NAME_LEN];
194 ssnprintf (name, sizeof (name), "%d", db->state[db->depth].index - 1);
196 cj_cb_map_key (ctx, (unsigned char *)name, (yajl_len_t) strlen (name));
197 }
198 }
200 /* yajl callbacks */
201 #define CJ_CB_ABORT 0
202 #define CJ_CB_CONTINUE 1
204 static int cj_cb_boolean (void * ctx, int boolVal)
205 {
206 cj_cb_inc_array_index (ctx, /* update_key = */ 0);
207 return (CJ_CB_CONTINUE);
208 }
210 static int cj_cb_null (void * ctx)
211 {
212 cj_cb_inc_array_index (ctx, /* update_key = */ 0);
213 return (CJ_CB_CONTINUE);
214 }
216 static int cj_cb_number (void *ctx,
217 const char *number, yajl_len_t number_len)
218 {
219 char buffer[number_len + 1];
221 cj_t *db = (cj_t *)ctx;
222 cj_key_t *key = db->state[db->depth].key;
223 value_t vt;
224 int type;
225 int status;
227 /* Create a null-terminated version of the string. */
228 memcpy (buffer, number, number_len);
229 buffer[sizeof (buffer) - 1] = 0;
231 if ((key == NULL) || !CJ_IS_KEY (key)) {
232 if (key != NULL)
233 NOTICE ("curl_json plugin: Found \"%s\", but the configuration expects"
234 " a map.", buffer);
235 cj_cb_inc_array_index (ctx, /* update_key = */ 0);
236 return (CJ_CB_CONTINUE);
237 } else {
238 cj_cb_inc_array_index (ctx, /* update_key = */ 1);
239 }
241 type = cj_get_type (key);
242 status = parse_value (buffer, &vt, type);
243 if (status != 0)
244 {
245 NOTICE ("curl_json plugin: Unable to parse number: \"%s\"", buffer);
246 return (CJ_CB_CONTINUE);
247 }
249 cj_submit (db, key, &vt);
250 return (CJ_CB_CONTINUE);
251 } /* int cj_cb_number */
253 /* Queries the key-tree of the parent context for "in_name" and, if found,
254 * updates the "key" field of the current context. Otherwise, "key" is set to
255 * NULL. */
256 static int cj_cb_map_key (void *ctx,
257 unsigned char const *in_name, yajl_len_t in_name_len)
258 {
259 cj_t *db = (cj_t *)ctx;
260 c_avl_tree_t *tree;
262 tree = db->state[db->depth-1].tree;
264 if (tree != NULL)
265 {
266 cj_key_t *value = NULL;
267 char *name;
268 size_t name_len;
270 /* Create a null-terminated version of the name. */
271 name = db->state[db->depth].name;
272 name_len = COUCH_MIN ((size_t) in_name_len,
273 sizeof (db->state[db->depth].name) - 1);
274 memcpy (name, in_name, name_len);
275 name[name_len] = 0;
277 if (c_avl_get (tree, name, (void *) &value) == 0)
278 db->state[db->depth].key = value;
279 else if (c_avl_get (tree, CJ_ANY, (void *) &value) == 0)
280 db->state[db->depth].key = value;
281 else
282 db->state[db->depth].key = NULL;
283 }
285 return (CJ_CB_CONTINUE);
286 }
288 static int cj_cb_string (void *ctx, const unsigned char *val,
289 yajl_len_t len)
290 {
291 /* Handle the string as if it was a number. */
292 return (cj_cb_number (ctx, (const char *) val, len));
293 } /* int cj_cb_string */
295 static int cj_cb_start (void *ctx)
296 {
297 cj_t *db = (cj_t *)ctx;
298 if (++db->depth >= YAJL_MAX_DEPTH)
299 {
300 ERROR ("curl_json plugin: %s depth exceeds max, aborting.",
301 db->url ? db->url : db->sock);
302 return (CJ_CB_ABORT);
303 }
304 return (CJ_CB_CONTINUE);
305 }
307 static int cj_cb_end (void *ctx)
308 {
309 cj_t *db = (cj_t *)ctx;
310 db->state[db->depth].tree = NULL;
311 --db->depth;
312 return (CJ_CB_CONTINUE);
313 }
315 static int cj_cb_start_map (void *ctx)
316 {
317 cj_cb_inc_array_index (ctx, /* update_key = */ 1);
318 return cj_cb_start (ctx);
319 }
321 static int cj_cb_end_map (void *ctx)
322 {
323 return cj_cb_end (ctx);
324 }
326 static int cj_cb_start_array (void * ctx)
327 {
328 cj_t *db = (cj_t *)ctx;
329 cj_cb_inc_array_index (ctx, /* update_key = */ 1);
330 if (db->depth+1 < YAJL_MAX_DEPTH) {
331 db->state[db->depth+1].in_array = 1;
332 db->state[db->depth+1].index = 0;
333 }
334 return cj_cb_start (ctx);
335 }
337 static int cj_cb_end_array (void * ctx)
338 {
339 cj_t *db = (cj_t *)ctx;
340 db->state[db->depth].in_array = 0;
341 return cj_cb_end (ctx);
342 }
344 static yajl_callbacks ycallbacks = {
345 cj_cb_null, /* null */
346 cj_cb_boolean, /* boolean */
347 NULL, /* integer */
348 NULL, /* double */
349 cj_cb_number,
350 cj_cb_string,
351 cj_cb_start_map,
352 cj_cb_map_key,
353 cj_cb_end_map,
354 cj_cb_start_array,
355 cj_cb_end_array
356 };
358 /* end yajl callbacks */
360 static void cj_key_free (cj_key_t *key) /* {{{ */
361 {
362 if (key == NULL)
363 return;
365 sfree (key->path);
366 sfree (key->type);
367 sfree (key->instance);
369 sfree (key);
370 } /* }}} void cj_key_free */
372 static void cj_tree_free (c_avl_tree_t *tree) /* {{{ */
373 {
374 char *name;
375 void *value;
377 while (c_avl_pick (tree, (void *) &name, (void *) &value) == 0)
378 {
379 cj_key_t *key = (cj_key_t *)value;
381 if (CJ_IS_KEY(key))
382 cj_key_free (key);
383 else
384 cj_tree_free ((c_avl_tree_t *)value);
386 sfree (name);
387 }
389 c_avl_destroy (tree);
390 } /* }}} void cj_tree_free */
392 static void cj_free (void *arg) /* {{{ */
393 {
394 cj_t *db;
396 DEBUG ("curl_json plugin: cj_free (arg = %p);", arg);
398 db = (cj_t *) arg;
400 if (db == NULL)
401 return;
403 if (db->curl != NULL)
404 curl_easy_cleanup (db->curl);
405 db->curl = NULL;
407 if (db->tree != NULL)
408 cj_tree_free (db->tree);
409 db->tree = NULL;
411 sfree (db->instance);
412 sfree (db->host);
414 sfree (db->sock);
416 sfree (db->url);
417 sfree (db->user);
418 sfree (db->pass);
419 sfree (db->credentials);
420 sfree (db->cacert);
421 sfree (db->post_body);
422 curl_slist_free_all (db->headers);
424 sfree (db);
425 } /* }}} void cj_free */
427 /* Configuration handling functions {{{ */
429 static c_avl_tree_t *cj_avl_create(void)
430 {
431 return c_avl_create ((int (*) (const void *, const void *)) strcmp);
432 }
434 static int cj_config_append_string (const char *name, struct curl_slist **dest, /* {{{ */
435 oconfig_item_t *ci)
436 {
437 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
438 {
439 WARNING ("curl_json plugin: `%s' needs exactly one string argument.", name);
440 return (-1);
441 }
443 *dest = curl_slist_append(*dest, ci->values[0].value.string);
444 if (*dest == NULL)
445 return (-1);
447 return (0);
448 } /* }}} int cj_config_append_string */
450 static int cj_config_add_key (cj_t *db, /* {{{ */
451 oconfig_item_t *ci)
452 {
453 cj_key_t *key;
454 int status;
455 int i;
457 if ((ci->values_num != 1)
458 || (ci->values[0].type != OCONFIG_TYPE_STRING))
459 {
460 WARNING ("curl_json plugin: The `Key' block "
461 "needs exactly one string argument.");
462 return (-1);
463 }
465 key = (cj_key_t *) malloc (sizeof (*key));
466 if (key == NULL)
467 {
468 ERROR ("curl_json plugin: malloc failed.");
469 return (-1);
470 }
471 memset (key, 0, sizeof (*key));
472 key->magic = CJ_KEY_MAGIC;
474 if (strcasecmp ("Key", ci->key) == 0)
475 {
476 status = cf_util_get_string (ci, &key->path);
477 if (status != 0)
478 {
479 sfree (key);
480 return (status);
481 }
482 }
483 else
484 {
485 ERROR ("curl_json plugin: cj_config: "
486 "Invalid key: %s", ci->key);
487 return (-1);
488 }
490 status = 0;
491 for (i = 0; i < ci->children_num; i++)
492 {
493 oconfig_item_t *child = ci->children + i;
495 if (strcasecmp ("Type", child->key) == 0)
496 status = cf_util_get_string (child, &key->type);
497 else if (strcasecmp ("Instance", child->key) == 0)
498 status = cf_util_get_string (child, &key->instance);
499 else
500 {
501 WARNING ("curl_json plugin: Option `%s' not allowed here.", child->key);
502 status = -1;
503 }
505 if (status != 0)
506 break;
507 } /* for (i = 0; i < ci->children_num; i++) */
509 while (status == 0)
510 {
511 if (key->type == NULL)
512 {
513 WARNING ("curl_json plugin: `Type' missing in `Key' block.");
514 status = -1;
515 }
517 break;
518 } /* while (status == 0) */
520 /* store path in a tree that will match the json map structure, example:
521 * "httpd/requests/count",
522 * "httpd/requests/current" ->
523 * { "httpd": { "requests": { "count": $key, "current": $key } } }
524 */
525 if (status == 0)
526 {
527 char *ptr;
528 char *name;
529 char ent[PATH_MAX];
530 c_avl_tree_t *tree;
532 if (db->tree == NULL)
533 db->tree = cj_avl_create();
535 tree = db->tree;
536 name = key->path;
537 ptr = key->path;
538 if (*ptr == '/')
539 ++ptr;
541 name = ptr;
542 while (*ptr)
543 {
544 if (*ptr == '/')
545 {
546 c_avl_tree_t *value;
547 int len;
549 len = ptr-name;
550 if (len == 0)
551 break;
552 sstrncpy (ent, name, len+1);
554 if (c_avl_get (tree, ent, (void *) &value) != 0)
555 {
556 value = cj_avl_create ();
557 c_avl_insert (tree, strdup (ent), value);
558 }
560 tree = value;
561 name = ptr+1;
562 }
563 ++ptr;
564 }
565 if (*name)
566 c_avl_insert (tree, strdup(name), key);
567 else
568 {
569 ERROR ("curl_json plugin: invalid key: %s", key->path);
570 status = -1;
571 }
572 }
574 return (status);
575 } /* }}} int cj_config_add_key */
577 static int cj_init_curl (cj_t *db) /* {{{ */
578 {
579 db->curl = curl_easy_init ();
580 if (db->curl == NULL)
581 {
582 ERROR ("curl_json plugin: curl_easy_init failed.");
583 return (-1);
584 }
586 curl_easy_setopt (db->curl, CURLOPT_NOSIGNAL, 1L);
587 curl_easy_setopt (db->curl, CURLOPT_WRITEFUNCTION, cj_curl_callback);
588 curl_easy_setopt (db->curl, CURLOPT_WRITEDATA, db);
589 curl_easy_setopt (db->curl, CURLOPT_USERAGENT,
590 PACKAGE_NAME"/"PACKAGE_VERSION);
591 curl_easy_setopt (db->curl, CURLOPT_ERRORBUFFER, db->curl_errbuf);
592 curl_easy_setopt (db->curl, CURLOPT_URL, db->url);
594 if (db->user != NULL)
595 {
596 size_t credentials_size;
598 credentials_size = strlen (db->user) + 2;
599 if (db->pass != NULL)
600 credentials_size += strlen (db->pass);
602 db->credentials = (char *) malloc (credentials_size);
603 if (db->credentials == NULL)
604 {
605 ERROR ("curl_json plugin: malloc failed.");
606 return (-1);
607 }
609 ssnprintf (db->credentials, credentials_size, "%s:%s",
610 db->user, (db->pass == NULL) ? "" : db->pass);
611 curl_easy_setopt (db->curl, CURLOPT_USERPWD, db->credentials);
612 }
614 curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYPEER, (long) db->verify_peer);
615 curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYHOST,
616 db->verify_host ? 2L : 0L);
617 if (db->cacert != NULL)
618 curl_easy_setopt (db->curl, CURLOPT_CAINFO, db->cacert);
619 if (db->headers != NULL)
620 curl_easy_setopt (db->curl, CURLOPT_HTTPHEADER, db->headers);
621 if (db->post_body != NULL)
622 curl_easy_setopt (db->curl, CURLOPT_POSTFIELDS, db->post_body);
624 return (0);
625 } /* }}} int cj_init_curl */
627 static int cj_config_add_url (oconfig_item_t *ci) /* {{{ */
628 {
629 cj_t *db;
630 int status = 0;
631 int i;
633 if ((ci->values_num != 1)
634 || (ci->values[0].type != OCONFIG_TYPE_STRING))
635 {
636 WARNING ("curl_json plugin: The `URL' block "
637 "needs exactly one string argument.");
638 return (-1);
639 }
641 db = (cj_t *) malloc (sizeof (*db));
642 if (db == NULL)
643 {
644 ERROR ("curl_json plugin: malloc failed.");
645 return (-1);
646 }
647 memset (db, 0, sizeof (*db));
649 if (strcasecmp ("URL", ci->key) == 0)
650 status = cf_util_get_string (ci, &db->url);
651 else if (strcasecmp ("Sock", ci->key) == 0)
652 status = cf_util_get_string (ci, &db->sock);
653 else
654 {
655 ERROR ("curl_json plugin: cj_config: "
656 "Invalid key: %s", ci->key);
657 return (-1);
658 }
659 if (status != 0)
660 {
661 sfree (db);
662 return (status);
663 }
665 /* Fill the `cj_t' structure.. */
666 for (i = 0; i < ci->children_num; i++)
667 {
668 oconfig_item_t *child = ci->children + i;
670 if (strcasecmp ("Instance", child->key) == 0)
671 status = cf_util_get_string (child, &db->instance);
672 else if (strcasecmp ("Host", child->key) == 0)
673 status = cf_util_get_string (child, &db->host);
674 else if (db->url && strcasecmp ("User", child->key) == 0)
675 status = cf_util_get_string (child, &db->user);
676 else if (db->url && strcasecmp ("Password", child->key) == 0)
677 status = cf_util_get_string (child, &db->pass);
678 else if (db->url && strcasecmp ("VerifyPeer", child->key) == 0)
679 status = cf_util_get_boolean (child, &db->verify_peer);
680 else if (db->url && strcasecmp ("VerifyHost", child->key) == 0)
681 status = cf_util_get_boolean (child, &db->verify_host);
682 else if (db->url && strcasecmp ("CACert", child->key) == 0)
683 status = cf_util_get_string (child, &db->cacert);
684 else if (db->url && strcasecmp ("Header", child->key) == 0)
685 status = cj_config_append_string ("Header", &db->headers, child);
686 else if (db->url && strcasecmp ("Post", child->key) == 0)
687 status = cf_util_get_string (child, &db->post_body);
688 else if (strcasecmp ("Key", child->key) == 0)
689 status = cj_config_add_key (db, child);
690 else
691 {
692 WARNING ("curl_json plugin: Option `%s' not allowed here.", child->key);
693 status = -1;
694 }
696 if (status != 0)
697 break;
698 }
700 if (status == 0)
701 {
702 if (db->tree == NULL)
703 {
704 WARNING ("curl_json plugin: No (valid) `Key' block within `%s' \"`%s'\".",
705 db->url ? "URL" : "Sock", db->url ? db->url : db->sock);
706 status = -1;
707 }
708 if (status == 0 && db->url)
709 status = cj_init_curl (db);
710 }
712 /* If all went well, register this database for reading */
713 if (status == 0)
714 {
715 user_data_t ud;
716 char cb_name[DATA_MAX_NAME_LEN];
718 if (db->instance == NULL)
719 db->instance = strdup("default");
721 DEBUG ("curl_json plugin: Registering new read callback: %s",
722 db->instance);
724 memset (&ud, 0, sizeof (ud));
725 ud.data = (void *) db;
726 ud.free_func = cj_free;
728 ssnprintf (cb_name, sizeof (cb_name), "curl_json-%s-%s",
729 db->instance, db->url ? db->url : db->sock);
731 plugin_register_complex_read (/* group = */ NULL, cb_name, cj_read,
732 /* interval = */ NULL, &ud);
733 }
734 else
735 {
736 cj_free (db);
737 return (-1);
738 }
740 return (0);
741 }
742 /* }}} int cj_config_add_database */
744 static int cj_config (oconfig_item_t *ci) /* {{{ */
745 {
746 int success;
747 int errors;
748 int status;
749 int i;
751 success = 0;
752 errors = 0;
754 for (i = 0; i < ci->children_num; i++)
755 {
756 oconfig_item_t *child = ci->children + i;
758 if (strcasecmp ("Sock", child->key) == 0
759 || strcasecmp ("URL", child->key) == 0)
760 {
761 status = cj_config_add_url (child);
762 if (status == 0)
763 success++;
764 else
765 errors++;
766 }
767 else
768 {
769 WARNING ("curl_json plugin: Option `%s' not allowed here.", child->key);
770 errors++;
771 }
772 }
774 if ((success == 0) && (errors > 0))
775 {
776 ERROR ("curl_json plugin: All statements failed.");
777 return (-1);
778 }
780 return (0);
781 } /* }}} int cj_config */
783 /* }}} End of configuration handling functions */
785 static void cj_submit (cj_t *db, cj_key_t *key, value_t *value) /* {{{ */
786 {
787 value_list_t vl = VALUE_LIST_INIT;
788 char *host;
790 vl.values = value;
791 vl.values_len = 1;
793 if ((db->host == NULL)
794 || (strcmp ("", db->host) == 0)
795 || (strcmp (CJ_DEFAULT_HOST, db->host) == 0))
796 host = hostname_g;
797 else
798 host = db->host;
800 if (key->instance == NULL)
801 {
802 if ((db->depth == 0) || (strcmp ("", db->state[db->depth-1].name) == 0))
803 sstrncpy (vl.type_instance, db->state[db->depth].name, sizeof (vl.type_instance));
804 else
805 ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%s-%s",
806 db->state[db->depth-1].name, db->state[db->depth].name);
807 }
808 else
809 sstrncpy (vl.type_instance, key->instance, sizeof (vl.type_instance));
811 sstrncpy (vl.host, host, sizeof (vl.host));
812 sstrncpy (vl.plugin, "curl_json", sizeof (vl.plugin));
813 sstrncpy (vl.plugin_instance, db->instance, sizeof (vl.plugin_instance));
814 sstrncpy (vl.type, key->type, sizeof (vl.type));
816 plugin_dispatch_values (&vl);
817 } /* }}} int cj_submit */
819 static int cj_sock_perform (cj_t *db) /* {{{ */
820 {
821 char errbuf[1024];
822 struct sockaddr_un sa_unix = {};
823 sa_unix.sun_family = AF_UNIX;
824 sstrncpy (sa_unix.sun_path, db->sock, sizeof (sa_unix.sun_path));
826 int fd = socket (AF_UNIX, SOCK_STREAM, 0);
827 if (fd < 0)
828 return (-1);
829 if (connect (fd, (struct sockaddr *)&sa_unix, sizeof(sa_unix)) < 0)
830 {
831 ERROR ("curl_json plugin: connect(%s) failed: %s",
832 (db->sock != NULL) ? db->sock : "<null>",
833 sstrerror(errno, errbuf, sizeof (errbuf)));
834 close (fd);
835 return (-1);
836 }
838 ssize_t red;
839 do {
840 unsigned char buffer[4096];
841 red = read (fd, buffer, sizeof(buffer));
842 if (red < 0) {
843 ERROR ("curl_json plugin: read(%s) failed: %s",
844 (db->sock != NULL) ? db->sock : "<null>",
845 sstrerror(errno, errbuf, sizeof (errbuf)));
846 close (fd);
847 return (-1);
848 }
849 if (!cj_curl_callback (buffer, red, 1, db))
850 break;
851 } while (red > 0);
852 close (fd);
853 return (0);
854 } /* }}} int cj_sock_perform */
857 static int cj_curl_perform(cj_t *db) /* {{{ */
858 {
859 int status;
860 long rc;
861 char *url;
862 url = NULL;
863 curl_easy_getinfo(db->curl, CURLINFO_EFFECTIVE_URL, &url);
865 status = curl_easy_perform (db->curl);
866 if (status != CURLE_OK)
867 {
868 ERROR ("curl_json plugin: curl_easy_perform failed with status %i: %s (%s)",
869 status, db->curl_errbuf, (url != NULL) ? url : "<null>");
870 return (-1);
871 }
873 curl_easy_getinfo(db->curl, CURLINFO_RESPONSE_CODE, &rc);
875 /* The response code is zero if a non-HTTP transport was used. */
876 if ((rc != 0) && (rc != 200))
877 {
878 ERROR ("curl_json plugin: curl_easy_perform failed with "
879 "response code %ld (%s)", rc, url);
880 return (-1);
881 }
882 return (0);
883 } /* }}} int cj_curl_perform */
885 static int cj_perform (cj_t *db) /* {{{ */
886 {
887 int status;
888 yajl_handle yprev = db->yajl;
890 db->yajl = yajl_alloc (&ycallbacks,
891 #if HAVE_YAJL_V2
892 /* alloc funcs = */ NULL,
893 #else
894 /* alloc funcs = */ NULL, NULL,
895 #endif
896 /* context = */ (void *)db);
897 if (db->yajl == NULL)
898 {
899 ERROR ("curl_json plugin: yajl_alloc failed.");
900 db->yajl = yprev;
901 return (-1);
902 }
904 if (db->url)
905 status = cj_curl_perform (db);
906 else
907 status = cj_sock_perform (db);
908 if (status < 0)
909 {
910 yajl_free (db->yajl);
911 db->yajl = yprev;
912 return (-1);
913 }
915 #if HAVE_YAJL_V2
916 status = yajl_complete_parse(db->yajl);
917 #else
918 status = yajl_parse_complete(db->yajl);
919 #endif
920 if (status != yajl_status_ok)
921 {
922 unsigned char *errmsg;
924 errmsg = yajl_get_error (db->yajl, /* verbose = */ 0,
925 /* jsonText = */ NULL, /* jsonTextLen = */ 0);
926 ERROR ("curl_json plugin: yajl_parse_complete failed: %s",
927 (char *) errmsg);
928 yajl_free_error (db->yajl, errmsg);
929 yajl_free (db->yajl);
930 db->yajl = yprev;
931 return (-1);
932 }
934 yajl_free (db->yajl);
935 db->yajl = yprev;
936 return (0);
937 } /* }}} int cj_perform */
939 static int cj_read (user_data_t *ud) /* {{{ */
940 {
941 cj_t *db;
943 if ((ud == NULL) || (ud->data == NULL))
944 {
945 ERROR ("curl_json plugin: cj_read: Invalid user data.");
946 return (-1);
947 }
949 db = (cj_t *) ud->data;
951 db->depth = 0;
952 memset (&db->state, 0, sizeof(db->state));
953 db->state[db->depth].tree = db->tree;
954 db->key = NULL;
956 return cj_perform (db);
957 } /* }}} int cj_read */
959 void module_register (void)
960 {
961 plugin_register_complex_config ("curl_json", cj_config);
962 } /* void module_register */
964 /* vim: set sw=2 sts=2 et fdm=marker : */