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 #define WH_DEFAULT_LOW_LIMIT_BYTES_PER_SEC 100
  43 /*
  44  * Private variables
  45  */
  46 struct wh_callback_s
  47 {
  48         char *name;
  49
  50         char *location;
  51         char *user;
  52         char *pass;
  53         char *credentials;
  54         _Bool verify_peer;
  55         _Bool verify_host;
  56         char *cacert;
  57         char *capath;
  58         char *clientkey;
  59         char *clientcert;
  60         char *clientkeypass;
  61         long sslversion;
  62         _Bool store_rates;
  63         _Bool abort_on_slow;
  64         int   low_limit_bytes;
  65         time_t interval;
  66         int post_timeout;
  67
  68 #define WH_FORMAT_COMMAND 0
  69 #define WH_FORMAT_JSON    1
  70         int format;
  71
  72         CURL *curl;
  73         char curl_errbuf[CURL_ERROR_SIZE];
  74
  75         char  *send_buffer;
  76         size_t send_buffer_size;
  77         size_t send_buffer_free;
  78         size_t send_buffer_fill;
  79         cdtime_t send_buffer_init_time;
  80
  81         pthread_mutex_t send_lock;
  82 };
  83 typedef struct wh_callback_s wh_callback_t;
  84
  85 static void wh_reset_buffer (wh_callback_t *cb)  /* {{{ */
  86 {
  87         memset (cb->send_buffer, 0, cb->send_buffer_size);
  88         cb->send_buffer_free = cb->send_buffer_size;
  89         cb->send_buffer_fill = 0;
  90         cb->send_buffer_init_time = cdtime ();
  91
  92         if (cb->format == WH_FORMAT_JSON)
  93         {
  94                 format_json_initialize (cb->send_buffer,
  95                                 &cb->send_buffer_fill,
  96                                 &cb->send_buffer_free);
  97         }
  98 } /* }}} wh_reset_buffer */
  99
 100 static int wh_send_buffer (wh_callback_t *cb) /* {{{ */
 101 {
 102         int status = 0;
 103
 104         curl_easy_setopt (cb->curl, CURLOPT_POSTFIELDS, cb->send_buffer);
 105         status = curl_easy_perform (cb->curl);
 106         if (status != CURLE_OK)
 107         {
 108                 ERROR ("write_http plugin: curl_easy_perform failed with "
 109                                 "status %i: %s",
 110                                 status, cb->curl_errbuf);
 111         }
 112         return (status);
 113 } /* }}} wh_send_buffer */
 114
 115 static int wh_callback_init (wh_callback_t *cb) /* {{{ */
 116 {
 117         struct curl_slist *headers;
 118
 119         if (cb->curl != NULL)
 120                 return (0);
 121
 122         cb->curl = curl_easy_init ();
 123         if (cb->curl == NULL)
 124         {
 125                 ERROR ("curl plugin: curl_easy_init failed.");
 126                 return (-1);
 127         }
 128
 129         if (cb->abort_on_slow && cb->interval > 0)
 130         {
 131                 curl_easy_setopt (cb->curl, CURLOPT_LOW_SPEED_LIMIT,
 132                                   (cb->low_limit_bytes ? cb->low_limit_bytes : WH_DEFAULT_LOW_LIMIT_BYTES_PER_SEC));
 133                 curl_easy_setopt (cb->curl, CURLOPT_LOW_SPEED_TIME, cb->interval);
 134         }
 135
 136         if (cb->post_timeout > 0)
 137                 curl_easy_setopt (cb->curl, CURLOPT_TIMEOUT, cb->post_timeout);
 138
 139         curl_easy_setopt (cb->curl, CURLOPT_NOSIGNAL, 1L);
 140         curl_easy_setopt (cb->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
 141
 142         headers = NULL;
 143         headers = curl_slist_append (headers, "Accept:  */*");
 144         if (cb->format == WH_FORMAT_JSON)
 145                 headers = curl_slist_append (headers, "Content-Type: application/json");
 146         else
 147                 headers = curl_slist_append (headers, "Content-Type: text/plain");
 148         headers = curl_slist_append (headers, "Expect:");
 149         curl_easy_setopt (cb->curl, CURLOPT_HTTPHEADER, headers);
 150
 151         curl_easy_setopt (cb->curl, CURLOPT_ERRORBUFFER, cb->curl_errbuf);
 152         curl_easy_setopt (cb->curl, CURLOPT_URL, cb->location);
 153         curl_easy_setopt (cb->curl, CURLOPT_FOLLOWLOCATION, 1L);
 154         curl_easy_setopt (cb->curl, CURLOPT_MAXREDIRS, 50L);
 155
 156         if (cb->user != NULL)
 157         {
 158 #ifdef HAVE_CURLOPT_USERNAME
 159                 curl_easy_setopt (cb->curl, CURLOPT_USERNAME, cb->user);
 160                 curl_easy_setopt (cb->curl, CURLOPT_PASSWORD,
 161                         (cb->pass == NULL) ? "" : cb->pass);
 162 #else
 163                 size_t credentials_size;
 164
 165                 credentials_size = strlen (cb->user) + 2;
 166                 if (cb->pass != NULL)
 167                         credentials_size += strlen (cb->pass);
 168
 169                 cb->credentials = (char *) malloc (credentials_size);
 170                 if (cb->credentials == NULL)
 171                 {
 172                         ERROR ("curl plugin: malloc failed.");
 173                         return (-1);
 174                 }
 175
 176                 ssnprintf (cb->credentials, credentials_size, "%s:%s",
 177                                 cb->user, (cb->pass == NULL) ? "" : cb->pass);
 178                 curl_easy_setopt (cb->curl, CURLOPT_USERPWD, cb->credentials);
 179 #endif
 180                 curl_easy_setopt (cb->curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 181         }
 182
 183         curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYPEER, (long) cb->verify_peer);
 184         curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYHOST,
 185                         cb->verify_host ? 2L : 0L);
 186         curl_easy_setopt (cb->curl, CURLOPT_SSLVERSION, cb->sslversion);
 187         if (cb->cacert != NULL)
 188                 curl_easy_setopt (cb->curl, CURLOPT_CAINFO, cb->cacert);
 189         if (cb->capath != NULL)
 190                 curl_easy_setopt (cb->curl, CURLOPT_CAPATH, cb->capath);
 191
 192         if (cb->clientkey != NULL && cb->clientcert != NULL)
 193         {
 194             curl_easy_setopt (cb->curl, CURLOPT_SSLKEY, cb->clientkey);
 195             curl_easy_setopt (cb->curl, CURLOPT_SSLCERT, cb->clientcert);
 196
 197             if (cb->clientkeypass != NULL)
 198                 curl_easy_setopt (cb->curl, CURLOPT_SSLKEYPASSWD, cb->clientkeypass);
 199         }
 200
 201         wh_reset_buffer (cb);
 202
 203         return (0);
 204 } /* }}} int wh_callback_init */
 205
 206 static int wh_flush_nolock (cdtime_t timeout, wh_callback_t *cb) /* {{{ */
 207 {
 208         int status;
 209
 210         DEBUG ("write_http plugin: wh_flush_nolock: timeout = %.3f; "
 211                         "send_buffer_fill = %zu;",
 212                         CDTIME_T_TO_DOUBLE (timeout),
 213                         cb->send_buffer_fill);
 214
 215         /* timeout == 0  => flush unconditionally */
 216         if (timeout > 0)
 217         {
 218                 cdtime_t now;
 219
 220                 now = cdtime ();
 221                 if ((cb->send_buffer_init_time + timeout) > now)
 222                         return (0);
 223         }
 224
 225         if (cb->format == WH_FORMAT_COMMAND)
 226         {
 227                 if (cb->send_buffer_fill <= 0)
 228                 {
 229                         cb->send_buffer_init_time = cdtime ();
 230                         return (0);
 231                 }
 232
 233                 status = wh_send_buffer (cb);
 234                 wh_reset_buffer (cb);
 235         }
 236         else if (cb->format == WH_FORMAT_JSON)
 237         {
 238                 if (cb->send_buffer_fill <= 2)
 239                 {
 240                         cb->send_buffer_init_time = cdtime ();
 241                         return (0);
 242                 }
 243
 244                 status = format_json_finalize (cb->send_buffer,
 245                                 &cb->send_buffer_fill,
 246                                 &cb->send_buffer_free);
 247                 if (status != 0)
 248                 {
 249                         ERROR ("write_http: wh_flush_nolock: "
 250                                         "format_json_finalize failed.");
 251                         wh_reset_buffer (cb);
 252                         return (status);
 253                 }
 254
 255                 status = wh_send_buffer (cb);
 256                 wh_reset_buffer (cb);
 257         }
 258         else
 259         {
 260                 ERROR ("write_http: wh_flush_nolock: "
 261                                 "Unknown format: %i",
 262                                 cb->format);
 263                 return (-1);
 264         }
 265
 266         return (status);
 267 } /* }}} wh_flush_nolock */
 268
 269 static int wh_flush (cdtime_t timeout, /* {{{ */
 270                 const char *identifier __attribute__((unused)),
 271                 user_data_t *user_data)
 272 {
 273         wh_callback_t *cb;
 274         int status;
 275
 276         if (user_data == NULL)
 277                 return (-EINVAL);
 278
 279         cb = user_data->data;
 280
 281         pthread_mutex_lock (&cb->send_lock);
 282
 283         if (cb->curl == NULL)
 284         {
 285                 status = wh_callback_init (cb);
 286                 if (status != 0)
 287                 {
 288                         ERROR ("write_http plugin: wh_callback_init failed.");
 289                         pthread_mutex_unlock (&cb->send_lock);
 290                         return (-1);
 291                 }
 292         }
 293
 294         status = wh_flush_nolock (timeout, cb);
 295         pthread_mutex_unlock (&cb->send_lock);
 296
 297         return (status);
 298 } /* }}} int wh_flush */
 299
 300 static void wh_callback_free (void *data) /* {{{ */
 301 {
 302         wh_callback_t *cb;
 303
 304         if (data == NULL)
 305                 return;
 306
 307         cb = data;
 308
 309         wh_flush_nolock (/* timeout = */ 0, cb);
 310
 311         if (cb->curl != NULL)
 312         {
 313                 curl_easy_cleanup (cb->curl);
 314                 cb->curl = NULL;
 315         }
 316         sfree (cb->name);
 317         sfree (cb->location);
 318         sfree (cb->user);
 319         sfree (cb->pass);
 320         sfree (cb->credentials);
 321         sfree (cb->cacert);
 322         sfree (cb->capath);
 323         sfree (cb->clientkey);
 324         sfree (cb->clientcert);
 325         sfree (cb->clientkeypass);
 326         sfree (cb->send_buffer);
 327
 328         sfree (cb);
 329 } /* }}} void wh_callback_free */
 330
 331 static int wh_write_command (const data_set_t *ds, const value_list_t *vl, /* {{{ */
 332                 wh_callback_t *cb)
 333 {
 334         char key[10*DATA_MAX_NAME_LEN];
 335         char values[512];
 336         char command[1024];
 337         size_t command_len;
 338
 339         int status;
 340
 341         if (0 != strcmp (ds->type, vl->type)) {
 342                 ERROR ("write_http plugin: DS type does not match "
 343                                 "value list type");
 344                 return -1;
 345         }
 346
 347         /* Copy the identifier to `key' and escape it. */
 348         status = FORMAT_VL (key, sizeof (key), vl);
 349         if (status != 0) {
 350                 ERROR ("write_http plugin: error with format_name");
 351                 return (status);
 352         }
 353         escape_string (key, sizeof (key));
 354
 355         /* Convert the values to an ASCII representation and put that into
 356          * `values'. */
 357         status = format_values (values, sizeof (values), ds, vl, cb->store_rates);
 358         if (status != 0) {
 359                 ERROR ("write_http plugin: error with "
 360                                 "wh_value_list_to_string");
 361                 return (status);
 362         }
 363
 364         command_len = (size_t) ssnprintf (command, sizeof (command),
 365                         "PUTVAL %s interval=%.3f %s\r\n",
 366                         key,
 367                         CDTIME_T_TO_DOUBLE (vl->interval),
 368                         values);
 369         if (command_len >= sizeof (command)) {
 370                 ERROR ("write_http plugin: Command buffer too small: "
 371                                 "Need %zu bytes.", command_len + 1);
 372                 return (-1);
 373         }
 374
 375         pthread_mutex_lock (&cb->send_lock);
 376
 377         if (cb->curl == NULL)
 378         {
 379                 cb->interval = CDTIME_T_TO_TIME_T(vl->interval);
 380                 status = wh_callback_init (cb);
 381                 if (status != 0)
 382                 {
 383                         ERROR ("write_http plugin: wh_callback_init failed.");
 384                         pthread_mutex_unlock (&cb->send_lock);
 385                         return (-1);
 386                 }
 387         }
 388
 389         if (command_len >= cb->send_buffer_free)
 390         {
 391                 status = wh_flush_nolock (/* timeout = */ 0, cb);
 392                 if (status != 0)
 393                 {
 394                         pthread_mutex_unlock (&cb->send_lock);
 395                         return (status);
 396                 }
 397         }
 398         assert (command_len < cb->send_buffer_free);
 399
 400         /* `command_len + 1' because `command_len' does not include the
 401          * trailing null byte. Neither does `send_buffer_fill'. */
 402         memcpy (cb->send_buffer + cb->send_buffer_fill,
 403                         command, command_len + 1);
 404         cb->send_buffer_fill += command_len;
 405         cb->send_buffer_free -= command_len;
 406
 407         DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%) \"%s\"",
 408                         cb->location,
 409                         cb->send_buffer_fill, cb->send_buffer_size,
 410                         100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size),
 411                         command);
 412
 413         /* Check if we have enough space for this command. */
 414         pthread_mutex_unlock (&cb->send_lock);
 415
 416         return (0);
 417 } /* }}} int wh_write_command */
 418
 419 static int wh_write_json (const data_set_t *ds, const value_list_t *vl, /* {{{ */
 420                 wh_callback_t *cb)
 421 {
 422         int status;
 423
 424         pthread_mutex_lock (&cb->send_lock);
 425
 426         if (cb->curl == NULL)
 427         {
 428                 cb->interval = CDTIME_T_TO_TIME_T(vl->interval);
 429
 430                 status = wh_callback_init (cb);
 431                 if (status != 0)
 432                 {
 433                         ERROR ("write_http plugin: wh_callback_init failed.");
 434                         pthread_mutex_unlock (&cb->send_lock);
 435                         return (-1);
 436                 }
 437         }
 438
 439         status = format_json_value_list (cb->send_buffer,
 440                         &cb->send_buffer_fill,
 441                         &cb->send_buffer_free,
 442                         ds, vl, cb->store_rates);
 443         if (status == (-ENOMEM))
 444         {
 445                 status = wh_flush_nolock (/* timeout = */ 0, cb);
 446                 if (status != 0)
 447                 {
 448                         wh_reset_buffer (cb);
 449                         pthread_mutex_unlock (&cb->send_lock);
 450                         return (status);
 451                 }
 452
 453                 status = format_json_value_list (cb->send_buffer,
 454                                 &cb->send_buffer_fill,
 455                                 &cb->send_buffer_free,
 456                                 ds, vl, cb->store_rates);
 457         }
 458         if (status != 0)
 459         {
 460                 pthread_mutex_unlock (&cb->send_lock);
 461                 return (status);
 462         }
 463
 464         DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%)",
 465                         cb->location,
 466                         cb->send_buffer_fill, cb->send_buffer_size,
 467                         100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size));
 468
 469         /* Check if we have enough space for this command. */
 470         pthread_mutex_unlock (&cb->send_lock);
 471
 472         return (0);
 473 } /* }}} int wh_write_json */
 474
 475 static int wh_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
 476                 user_data_t *user_data)
 477 {
 478         wh_callback_t *cb;
 479         int status;
 480
 481         if (user_data == NULL)
 482                 return (-EINVAL);
 483
 484         cb = user_data->data;
 485
 486         if (cb->format == WH_FORMAT_JSON)
 487                 status = wh_write_json (ds, vl, cb);
 488         else
 489                 status = wh_write_command (ds, vl, cb);
 490
 491         return (status);
 492 } /* }}} int wh_write */
 493
 494 static int config_set_format (wh_callback_t *cb, /* {{{ */
 495                 oconfig_item_t *ci)
 496 {
 497         char *string;
 498
 499         if ((ci->values_num != 1)
 500                         || (ci->values[0].type != OCONFIG_TYPE_STRING))
 501         {
 502                 WARNING ("write_http plugin: The `%s' config option "
 503                                 "needs exactly one string argument.", ci->key);
 504                 return (-1);
 505         }
 506
 507         string = ci->values[0].value.string;
 508         if (strcasecmp ("Command", string) == 0)
 509                 cb->format = WH_FORMAT_COMMAND;
 510         else if (strcasecmp ("JSON", string) == 0)
 511                 cb->format = WH_FORMAT_JSON;
 512         else
 513         {
 514                 ERROR ("write_http plugin: Invalid format string: %s",
 515                                 string);
 516                 return (-1);
 517         }
 518
 519         return (0);
 520 } /* }}} int config_set_format */
 521
 522 static int wh_config_node (oconfig_item_t *ci) /* {{{ */
 523 {
 524         wh_callback_t *cb;
 525         int buffer_size = 0;
 526         user_data_t user_data;
 527         char callback_name[DATA_MAX_NAME_LEN];
 528         int i;
 529
 530         cb = malloc (sizeof (*cb));
 531         if (cb == NULL)
 532         {
 533                 ERROR ("write_http plugin: malloc failed.");
 534                 return (-1);
 535         }
 536         memset (cb, 0, sizeof (*cb));
 537         cb->verify_peer = 1;
 538         cb->verify_host = 1;
 539         cb->format = WH_FORMAT_COMMAND;
 540         cb->sslversion = CURL_SSLVERSION_DEFAULT;
 541         cb->low_limit_bytes = WH_DEFAULT_LOW_LIMIT_BYTES_PER_SEC;
 542         cb->post_timeout = 0;
 543
 544         pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
 545
 546         cf_util_get_string (ci, &cb->name);
 547
 548         /* FIXME: Remove this legacy mode in version 6. */
 549         if (strcasecmp ("URL", ci->key) == 0)
 550                 cf_util_get_string (ci, &cb->location);
 551
 552         for (i = 0; i < ci->children_num; i++)
 553         {
 554                 oconfig_item_t *child = ci->children + i;
 555
 556                 if (strcasecmp ("URL", child->key) == 0)
 557                         cf_util_get_string (child, &cb->location);
 558                 else if (strcasecmp ("User", child->key) == 0)
 559                         cf_util_get_string (child, &cb->user);
 560                 else if (strcasecmp ("Password", child->key) == 0)
 561                         cf_util_get_string (child, &cb->pass);
 562                 else if (strcasecmp ("VerifyPeer", child->key) == 0)
 563                         cf_util_get_boolean (child, &cb->verify_peer);
 564                 else if (strcasecmp ("VerifyHost", child->key) == 0)
 565                         cf_util_get_boolean (child, &cb->verify_host);
 566                 else if (strcasecmp ("CACert", child->key) == 0)
 567                         cf_util_get_string (child, &cb->cacert);
 568                 else if (strcasecmp ("CAPath", child->key) == 0)
 569                         cf_util_get_string (child, &cb->capath);
 570                 else if (strcasecmp ("ClientKey", child->key) == 0)
 571                         cf_util_get_string (child, &cb->clientkey);
 572                 else if (strcasecmp ("ClientCert", child->key) == 0)
 573                         cf_util_get_string (child, &cb->clientcert);
 574                 else if (strcasecmp ("ClientKeyPass", child->key) == 0)
 575                         cf_util_get_string (child, &cb->clientkeypass);
 576                 else if (strcasecmp ("SSLVersion", child->key) == 0)
 577                 {
 578                         char *value = NULL;
 579
 580                         cf_util_get_string (child, &value);
 581
 582                         if (value == NULL || strcasecmp ("default", value) == 0)
 583                                 cb->sslversion = CURL_SSLVERSION_DEFAULT;
 584                         else if (strcasecmp ("SSLv2", value) == 0)
 585                                 cb->sslversion = CURL_SSLVERSION_SSLv2;
 586                         else if (strcasecmp ("SSLv3", value) == 0)
 587                                 cb->sslversion = CURL_SSLVERSION_SSLv3;
 588                         else if (strcasecmp ("TLSv1", value) == 0)
 589                                 cb->sslversion = CURL_SSLVERSION_TLSv1;
 590 #if (LIBCURL_VERSION_MAJOR > 7) || (LIBCURL_VERSION_MAJOR == 7 && LIBCURL_VERSION_MINOR >= 34)
 591                         else if (strcasecmp ("TLSv1_0", value) == 0)
 592                                 cb->sslversion = CURL_SSLVERSION_TLSv1_0;
 593                         else if (strcasecmp ("TLSv1_1", value) == 0)
 594                                 cb->sslversion = CURL_SSLVERSION_TLSv1_1;
 595                         else if (strcasecmp ("TLSv1_2", value) == 0)
 596                                 cb->sslversion = CURL_SSLVERSION_TLSv1_2;
 597 #endif
 598                         else
 599                                 ERROR ("write_http plugin: Invalid SSLVersion "
 600                                                 "option: %s.", value);
 601
 602                         sfree(value);
 603                 }
 604                 else if (strcasecmp ("Format", child->key) == 0)
 605                         config_set_format (cb, child);
 606                 else if (strcasecmp ("StoreRates", child->key) == 0)
 607                         cf_util_get_boolean (child, &cb->store_rates);
 608                 else if (strcasecmp ("BufferSize", child->key) == 0)
 609                         cf_util_get_int (child, &buffer_size);
 610                 else if (strcasecmp ("LowSpeedLimit", child->key) == 0)
 611                         cf_util_get_boolean (child,&cb->abort_on_slow);
 612                 else if (strcasecmp ("LowLimitBytesPerSec", child->key) == 0)
 613                         cf_util_get_int (child, &cb->low_limit_bytes);
 614                 else if (strcasecmp ("PostTimeoutSec", child->key) == 0)
 615                         cf_util_get_int (child, &cb->post_timeout);
 616                 else
 617                 {
 618                         ERROR ("write_http plugin: Invalid configuration "
 619                                         "option: %s.", child->key);
 620                 }
 621         }
 622
 623         if (cb->location == NULL)
 624         {
 625                 ERROR ("write_http plugin: no URL defined for instance '%s'",
 626                         cb->name);
 627                 wh_callback_free (cb);
 628                 return (-1);
 629         }
 630
 631         if (cb->abort_on_slow)
 632                 cb->interval = CDTIME_T_TO_TIME_T(plugin_get_interval());
 633
 634         if (cb->post_timeout == 0)
 635                 //setting default timeout to plugin interval.
 636                 cb->post_timeout = CDTIME_T_TO_TIME_T(plugin_get_interval());
 637
 638         /* Determine send_buffer_size. */
 639         cb->send_buffer_size = WRITE_HTTP_DEFAULT_BUFFER_SIZE;
 640         if (buffer_size >= 1024)
 641                 cb->send_buffer_size = (size_t) buffer_size;
 642         else if (buffer_size != 0)
 643                 ERROR ("write_http plugin: Ignoring invalid BufferSize setting (%d).",
 644                                 buffer_size);
 645
 646         /* Allocate the buffer. */
 647         cb->send_buffer = malloc (cb->send_buffer_size);
 648         if (cb->send_buffer == NULL)
 649         {
 650                 ERROR ("write_http plugin: malloc(%zu) failed.", cb->send_buffer_size);
 651                 wh_callback_free (cb);
 652                 return (-1);
 653         }
 654         /* Nulls the buffer and sets ..._free and ..._fill. */
 655         wh_reset_buffer (cb);
 656
 657         ssnprintf (callback_name, sizeof (callback_name), "write_http/%s",
 658                         cb->name);
 659         DEBUG ("write_http: Registering write callback '%s' with URL '%s'",
 660                         callback_name, cb->location);
 661
 662         memset (&user_data, 0, sizeof (user_data));
 663         user_data.data = cb;
 664         user_data.free_func = NULL;
 665         plugin_register_flush (callback_name, wh_flush, &user_data);
 666
 667         user_data.free_func = wh_callback_free;
 668         plugin_register_write (callback_name, wh_write, &user_data);
 669
 670         return (0);
 671 } /* }}} int wh_config_node */
 672
 673 static int wh_config (oconfig_item_t *ci) /* {{{ */
 674 {
 675         int i;
 676
 677         for (i = 0; i < ci->children_num; i++)
 678         {
 679                 oconfig_item_t *child = ci->children + i;
 680
 681                 if (strcasecmp ("Node", child->key) == 0)
 682                         wh_config_node (child);
 683                 /* FIXME: Remove this legacy mode in version 6. */
 684                 else if (strcasecmp ("URL", child->key) == 0) {
 685                         WARNING ("write_http plugin: Legacy <URL> block found. "
 686                                 "Please use <Node> instead.");
 687                         wh_config_node (child);
 688                 }
 689                 else
 690                 {
 691                         ERROR ("write_http plugin: Invalid configuration "
 692                                         "option: %s.", child->key);
 693                 }
 694         }
 695
 696         return (0);
 697 } /* }}} int wh_config */
 698
 699 static int wh_init (void) /* {{{ */
 700 {
 701         /* Call this while collectd is still single-threaded to avoid
 702          * initialization issues in libgcrypt. */
 703         curl_global_init (CURL_GLOBAL_SSL);
 704         return (0);
 705 } /* }}} int wh_init */
 706
 707 void module_register (void) /* {{{ */
 708 {
 709         plugin_register_complex_config ("write_http", wh_config);
 710         plugin_register_init ("write_http", wh_init);
 711 } /* }}} void module_register */
 712
 713 /* vim: set fdm=marker sw=8 ts=8 tw=78 et : */