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