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