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                 size_t credentials_size;
 144
 145                 credentials_size = strlen (cb->user) + 2;
 146                 if (cb->pass != NULL)
 147                         credentials_size += strlen (cb->pass);
 148
 149                 cb->credentials = (char *) malloc (credentials_size);
 150                 if (cb->credentials == NULL)
 151                 {
 152                         ERROR ("curl plugin: malloc failed.");
 153                         return (-1);
 154                 }
 155
 156                 ssnprintf (cb->credentials, credentials_size, "%s:%s",
 157                                 cb->user, (cb->pass == NULL) ? "" : cb->pass);
 158                 curl_easy_setopt (cb->curl, CURLOPT_USERPWD, cb->credentials);
 159                 curl_easy_setopt (cb->curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 160         }
 161
 162         curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYPEER, (long) cb->verify_peer);
 163         curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYHOST,
 164                         cb->verify_host ? 2L : 0L);
 165         curl_easy_setopt (cb->curl, CURLOPT_SSLVERSION, cb->sslversion);
 166         if (cb->cacert != NULL)
 167                 curl_easy_setopt (cb->curl, CURLOPT_CAINFO, cb->cacert);
 168         if (cb->capath != NULL)
 169                 curl_easy_setopt (cb->curl, CURLOPT_CAPATH, cb->capath);
 170
 171         if (cb->clientkey != NULL && cb->clientcert != NULL)
 172         {
 173             curl_easy_setopt (cb->curl, CURLOPT_SSLKEY, cb->clientkey);
 174             curl_easy_setopt (cb->curl, CURLOPT_SSLCERT, cb->clientcert);
 175
 176             if (cb->clientkeypass != NULL)
 177                 curl_easy_setopt (cb->curl, CURLOPT_SSLKEYPASSWD, cb->clientkeypass);
 178         }
 179
 180         wh_reset_buffer (cb);
 181
 182         return (0);
 183 } /* }}} int wh_callback_init */
 184
 185 static int wh_flush_nolock (cdtime_t timeout, wh_callback_t *cb) /* {{{ */
 186 {
 187         int status;
 188
 189         DEBUG ("write_http plugin: wh_flush_nolock: timeout = %.3f; "
 190                         "send_buffer_fill = %zu;",
 191                         CDTIME_T_TO_DOUBLE (timeout),
 192                         cb->send_buffer_fill);
 193
 194         /* timeout == 0  => flush unconditionally */
 195         if (timeout > 0)
 196         {
 197                 cdtime_t now;
 198
 199                 now = cdtime ();
 200                 if ((cb->send_buffer_init_time + timeout) > now)
 201                         return (0);
 202         }
 203
 204         if (cb->format == WH_FORMAT_COMMAND)
 205         {
 206                 if (cb->send_buffer_fill <= 0)
 207                 {
 208                         cb->send_buffer_init_time = cdtime ();
 209                         return (0);
 210                 }
 211
 212                 status = wh_send_buffer (cb);
 213                 wh_reset_buffer (cb);
 214         }
 215         else if (cb->format == WH_FORMAT_JSON)
 216         {
 217                 if (cb->send_buffer_fill <= 2)
 218                 {
 219                         cb->send_buffer_init_time = cdtime ();
 220                         return (0);
 221                 }
 222
 223                 status = format_json_finalize (cb->send_buffer,
 224                                 &cb->send_buffer_fill,
 225                                 &cb->send_buffer_free);
 226                 if (status != 0)
 227                 {
 228                         ERROR ("write_http: wh_flush_nolock: "
 229                                         "format_json_finalize failed.");
 230                         wh_reset_buffer (cb);
 231                         return (status);
 232                 }
 233
 234                 status = wh_send_buffer (cb);
 235                 wh_reset_buffer (cb);
 236         }
 237         else
 238         {
 239                 ERROR ("write_http: wh_flush_nolock: "
 240                                 "Unknown format: %i",
 241                                 cb->format);
 242                 return (-1);
 243         }
 244
 245         return (status);
 246 } /* }}} wh_flush_nolock */
 247
 248 static int wh_flush (cdtime_t timeout, /* {{{ */
 249                 const char *identifier __attribute__((unused)),
 250                 user_data_t *user_data)
 251 {
 252         wh_callback_t *cb;
 253         int status;
 254
 255         if (user_data == NULL)
 256                 return (-EINVAL);
 257
 258         cb = user_data->data;
 259
 260         pthread_mutex_lock (&cb->send_lock);
 261
 262         if (cb->curl == NULL)
 263         {
 264                 status = wh_callback_init (cb);
 265                 if (status != 0)
 266                 {
 267                         ERROR ("write_http plugin: wh_callback_init failed.");
 268                         pthread_mutex_unlock (&cb->send_lock);
 269                         return (-1);
 270                 }
 271         }
 272
 273         status = wh_flush_nolock (timeout, cb);
 274         pthread_mutex_unlock (&cb->send_lock);
 275
 276         return (status);
 277 } /* }}} int wh_flush */
 278
 279 static void wh_callback_free (void *data) /* {{{ */
 280 {
 281         wh_callback_t *cb;
 282
 283         if (data == NULL)
 284                 return;
 285
 286         cb = data;
 287
 288         wh_flush_nolock (/* timeout = */ 0, cb);
 289
 290         if (cb->curl != NULL)
 291         {
 292                 curl_easy_cleanup (cb->curl);
 293                 cb->curl = NULL;
 294         }
 295         sfree (cb->name);
 296         sfree (cb->location);
 297         sfree (cb->user);
 298         sfree (cb->pass);
 299         sfree (cb->credentials);
 300         sfree (cb->cacert);
 301         sfree (cb->capath);
 302         sfree (cb->clientkey);
 303         sfree (cb->clientcert);
 304         sfree (cb->clientkeypass);
 305         sfree (cb->send_buffer);
 306
 307         sfree (cb);
 308 } /* }}} void wh_callback_free */
 309
 310 static int wh_write_command (const data_set_t *ds, const value_list_t *vl, /* {{{ */
 311                 wh_callback_t *cb)
 312 {
 313         char key[10*DATA_MAX_NAME_LEN];
 314         char values[512];
 315         char command[1024];
 316         size_t command_len;
 317
 318         int status;
 319
 320         if (0 != strcmp (ds->type, vl->type)) {
 321                 ERROR ("write_http plugin: DS type does not match "
 322                                 "value list type");
 323                 return -1;
 324         }
 325
 326         /* Copy the identifier to `key' and escape it. */
 327         status = FORMAT_VL (key, sizeof (key), vl);
 328         if (status != 0) {
 329                 ERROR ("write_http plugin: error with format_name");
 330                 return (status);
 331         }
 332         escape_string (key, sizeof (key));
 333
 334         /* Convert the values to an ASCII representation and put that into
 335          * `values'. */
 336         status = format_values (values, sizeof (values), ds, vl, cb->store_rates);
 337         if (status != 0) {
 338                 ERROR ("write_http plugin: error with "
 339                                 "wh_value_list_to_string");
 340                 return (status);
 341         }
 342
 343         command_len = (size_t) ssnprintf (command, sizeof (command),
 344                         "PUTVAL %s interval=%.3f %s\r\n",
 345                         key,
 346                         CDTIME_T_TO_DOUBLE (vl->interval),
 347                         values);
 348         if (command_len >= sizeof (command)) {
 349                 ERROR ("write_http plugin: Command buffer too small: "
 350                                 "Need %zu bytes.", command_len + 1);
 351                 return (-1);
 352         }
 353
 354         pthread_mutex_lock (&cb->send_lock);
 355
 356         if (cb->curl == NULL)
 357         {
 358                 status = wh_callback_init (cb);
 359                 if (status != 0)
 360                 {
 361                         ERROR ("write_http plugin: wh_callback_init failed.");
 362                         pthread_mutex_unlock (&cb->send_lock);
 363                         return (-1);
 364                 }
 365         }
 366
 367         if (command_len >= cb->send_buffer_free)
 368         {
 369                 status = wh_flush_nolock (/* timeout = */ 0, cb);
 370                 if (status != 0)
 371                 {
 372                         pthread_mutex_unlock (&cb->send_lock);
 373                         return (status);
 374                 }
 375         }
 376         assert (command_len < cb->send_buffer_free);
 377
 378         /* `command_len + 1' because `command_len' does not include the
 379          * trailing null byte. Neither does `send_buffer_fill'. */
 380         memcpy (cb->send_buffer + cb->send_buffer_fill,
 381                         command, command_len + 1);
 382         cb->send_buffer_fill += command_len;
 383         cb->send_buffer_free -= command_len;
 384
 385         DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%) \"%s\"",
 386                         cb->location,
 387                         cb->send_buffer_fill, cb->send_buffer_size,
 388                         100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size),
 389                         command);
 390
 391         /* Check if we have enough space for this command. */
 392         pthread_mutex_unlock (&cb->send_lock);
 393
 394         return (0);
 395 } /* }}} int wh_write_command */
 396
 397 static int wh_write_json (const data_set_t *ds, const value_list_t *vl, /* {{{ */
 398                 wh_callback_t *cb)
 399 {
 400         int status;
 401
 402         pthread_mutex_lock (&cb->send_lock);
 403
 404         if (cb->curl == NULL)
 405         {
 406                 status = wh_callback_init (cb);
 407                 if (status != 0)
 408                 {
 409                         ERROR ("write_http plugin: wh_callback_init failed.");
 410                         pthread_mutex_unlock (&cb->send_lock);
 411                         return (-1);
 412                 }
 413         }
 414
 415         status = format_json_value_list (cb->send_buffer,
 416                         &cb->send_buffer_fill,
 417                         &cb->send_buffer_free,
 418                         ds, vl, cb->store_rates);
 419         if (status == (-ENOMEM))
 420         {
 421                 status = wh_flush_nolock (/* timeout = */ 0, cb);
 422                 if (status != 0)
 423                 {
 424                         wh_reset_buffer (cb);
 425                         pthread_mutex_unlock (&cb->send_lock);
 426                         return (status);
 427                 }
 428
 429                 status = format_json_value_list (cb->send_buffer,
 430                                 &cb->send_buffer_fill,
 431                                 &cb->send_buffer_free,
 432                                 ds, vl, cb->store_rates);
 433         }
 434         if (status != 0)
 435         {
 436                 pthread_mutex_unlock (&cb->send_lock);
 437                 return (status);
 438         }
 439
 440         DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%)",
 441                         cb->location,
 442                         cb->send_buffer_fill, cb->send_buffer_size,
 443                         100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size));
 444
 445         /* Check if we have enough space for this command. */
 446         pthread_mutex_unlock (&cb->send_lock);
 447
 448         return (0);
 449 } /* }}} int wh_write_json */
 450
 451 static int wh_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
 452                 user_data_t *user_data)
 453 {
 454         wh_callback_t *cb;
 455         int status;
 456
 457         if (user_data == NULL)
 458                 return (-EINVAL);
 459
 460         cb = user_data->data;
 461
 462         if (cb->format == WH_FORMAT_JSON)
 463                 status = wh_write_json (ds, vl, cb);
 464         else
 465                 status = wh_write_command (ds, vl, cb);
 466
 467         return (status);
 468 } /* }}} int wh_write */
 469
 470 static int config_set_format (wh_callback_t *cb, /* {{{ */
 471                 oconfig_item_t *ci)
 472 {
 473         char *string;
 474
 475         if ((ci->values_num != 1)
 476                         || (ci->values[0].type != OCONFIG_TYPE_STRING))
 477         {
 478                 WARNING ("write_http plugin: The `%s' config option "
 479                                 "needs exactly one string argument.", ci->key);
 480                 return (-1);
 481         }
 482
 483         string = ci->values[0].value.string;
 484         if (strcasecmp ("Command", string) == 0)
 485                 cb->format = WH_FORMAT_COMMAND;
 486         else if (strcasecmp ("JSON", string) == 0)
 487                 cb->format = WH_FORMAT_JSON;
 488         else
 489         {
 490                 ERROR ("write_http plugin: Invalid format string: %s",
 491                                 string);
 492                 return (-1);
 493         }
 494
 495         return (0);
 496 } /* }}} int config_set_format */
 497
 498 static int wh_config_node (oconfig_item_t *ci) /* {{{ */
 499 {
 500         wh_callback_t *cb;
 501         int buffer_size = 0;
 502         user_data_t user_data;
 503         char callback_name[DATA_MAX_NAME_LEN];
 504         int i;
 505
 506         cb = malloc (sizeof (*cb));
 507         if (cb == NULL)
 508         {
 509                 ERROR ("write_http plugin: malloc failed.");
 510                 return (-1);
 511         }
 512         memset (cb, 0, sizeof (*cb));
 513         cb->verify_peer = 1;
 514         cb->verify_host = 1;
 515         cb->format = WH_FORMAT_COMMAND;
 516         cb->sslversion = CURL_SSLVERSION_DEFAULT;
 517
 518         pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
 519
 520         cf_util_get_string (ci, &cb->name);
 521
 522         /* FIXME: Remove this legacy mode in version 6. */
 523         if (strcasecmp ("URL", ci->key) == 0)
 524                 cf_util_get_string (ci, &cb->location);
 525
 526         for (i = 0; i < ci->children_num; i++)
 527         {
 528                 oconfig_item_t *child = ci->children + i;
 529
 530                 if (strcasecmp ("URL", child->key) == 0)
 531                         cf_util_get_string (child, &cb->location);
 532                 else if (strcasecmp ("User", child->key) == 0)
 533                         cf_util_get_string (child, &cb->user);
 534                 else if (strcasecmp ("Password", child->key) == 0)
 535                         cf_util_get_string (child, &cb->pass);
 536                 else if (strcasecmp ("VerifyPeer", child->key) == 0)
 537                         cf_util_get_boolean (child, &cb->verify_peer);
 538                 else if (strcasecmp ("VerifyHost", child->key) == 0)
 539                         cf_util_get_boolean (child, &cb->verify_host);
 540                 else if (strcasecmp ("CACert", child->key) == 0)
 541                         cf_util_get_string (child, &cb->cacert);
 542                 else if (strcasecmp ("CAPath", child->key) == 0)
 543                         cf_util_get_string (child, &cb->capath);
 544                 else if (strcasecmp ("ClientKey", child->key) == 0)
 545                         cf_util_get_string (child, &cb->clientkey);
 546                 else if (strcasecmp ("ClientCert", child->key) == 0)
 547                         cf_util_get_string (child, &cb->clientcert);
 548                 else if (strcasecmp ("ClientKeyPass", child->key) == 0)
 549                         cf_util_get_string (child, &cb->clientkeypass);
 550                 else if (strcasecmp ("SSLVersion", child->key) == 0)
 551                 {
 552                         char *value = NULL;
 553
 554                         cf_util_get_string (child, &value);
 555
 556                         if (value == NULL || strcasecmp ("default", value) == 0)
 557                                 cb->sslversion = CURL_SSLVERSION_DEFAULT;
 558                         else if (strcasecmp ("SSLv2", value) == 0)
 559                                 cb->sslversion = CURL_SSLVERSION_SSLv2;
 560                         else if (strcasecmp ("SSLv3", value) == 0)
 561                                 cb->sslversion = CURL_SSLVERSION_SSLv3;
 562                         else if (strcasecmp ("TLSv1", value) == 0)
 563                                 cb->sslversion = CURL_SSLVERSION_TLSv1;
 564 #if (LIBCURL_VERSION_MAJOR > 7) || (LIBCURL_VERSION_MAJOR == 7 && LIBCURL_VERSION_MINOR >= 34)
 565                         else if (strcasecmp ("TLSv1_0", value) == 0)
 566                                 cb->sslversion = CURL_SSLVERSION_TLSv1_0;
 567                         else if (strcasecmp ("TLSv1_1", value) == 0)
 568                                 cb->sslversion = CURL_SSLVERSION_TLSv1_1;
 569                         else if (strcasecmp ("TLSv1_2", value) == 0)
 570                                 cb->sslversion = CURL_SSLVERSION_TLSv1_2;
 571 #endif
 572                         else
 573                                 ERROR ("write_http plugin: Invalid SSLVersion "
 574                                                 "option: %s.", value);
 575
 576                         sfree(value);
 577                 }
 578                 else if (strcasecmp ("Format", child->key) == 0)
 579                         config_set_format (cb, child);
 580                 else if (strcasecmp ("StoreRates", child->key) == 0)
 581                         cf_util_get_boolean (child, &cb->store_rates);
 582                 else if (strcasecmp ("BufferSize", child->key) == 0)
 583                         cf_util_get_int (child, &buffer_size);
 584                 else
 585                 {
 586                         ERROR ("write_http plugin: Invalid configuration "
 587                                         "option: %s.", child->key);
 588                 }
 589         }
 590
 591         if (cb->location == NULL)
 592         {
 593                 ERROR ("write_http plugin: no URL defined for instance '%s'",
 594                         cb->name);
 595                 wh_callback_free (cb);
 596                 return (-1);
 597         }
 598
 599         /* Determine send_buffer_size. */
 600         cb->send_buffer_size = WRITE_HTTP_DEFAULT_BUFFER_SIZE;
 601         if (buffer_size >= 1024)
 602                 cb->send_buffer_size = (size_t) buffer_size;
 603         else if (buffer_size != 0)
 604                 ERROR ("write_http plugin: Ignoring invalid BufferSize setting (%d).",
 605                                 buffer_size);
 606
 607         /* Allocate the buffer. */
 608         cb->send_buffer = malloc (cb->send_buffer_size);
 609         if (cb->send_buffer == NULL)
 610         {
 611                 ERROR ("write_http plugin: malloc(%zu) failed.", cb->send_buffer_size);
 612                 wh_callback_free (cb);
 613                 return (-1);
 614         }
 615         /* Nulls the buffer and sets ..._free and ..._fill. */
 616         wh_reset_buffer (cb);
 617
 618         ssnprintf (callback_name, sizeof (callback_name), "write_http/%s",
 619                         cb->name);
 620         DEBUG ("write_http: Registering write callback '%s' with URL '%s'",
 621                         callback_name, 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 (callback_name, wh_flush, &user_data);
 627
 628         user_data.free_func = wh_callback_free;
 629         plugin_register_write (callback_name, wh_write, &user_data);
 630
 631         return (0);
 632 } /* }}} int wh_config_node */
 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 ("Node", child->key) == 0)
 643                         wh_config_node (child);
 644                 /* FIXME: Remove this legacy mode in version 6. */
 645                 else if (strcasecmp ("URL", child->key) == 0) {
 646                         WARNING ("write_http plugin: Legacy <URL> block found. "
 647                                 "Please use <Node> instead.");
 648                         wh_config_node (child);
 649                 }
 650                 else
 651                 {
 652                         ERROR ("write_http plugin: Invalid configuration "
 653                                         "option: %s.", child->key);
 654                 }
 655         }
 656
 657         return (0);
 658 } /* }}} int wh_config */
 659
 660 static int wh_init (void) /* {{{ */
 661 {
 662         /* Call this while collectd is still single-threaded to avoid
 663          * initialization issues in libgcrypt. */
 664         curl_global_init (CURL_GLOBAL_SSL);
 665         return (0);
 666 } /* }}} int wh_init */
 667
 668 void module_register (void) /* {{{ */
 669 {
 670         plugin_register_complex_config ("write_http", wh_config);
 671         plugin_register_init ("write_http", wh_init);
 672 } /* }}} void module_register */
 673
 674 /* vim: set fdm=marker sw=8 ts=8 tw=78 et : */