src/rrd2json.c

   1 #include "common.h"
   2
   3 void rrd_stats_api_v1_chart_with_data(RRDSET *st, BUFFER *wb, size_t *dimensions_count, size_t *memory_used)
   4 {
   5     pthread_rwlock_rdlock(&st->rwlock);
   6
   7     buffer_sprintf(wb,
   8         "\t\t{\n"
   9         "\t\t\t\"id\": \"%s\",\n"
  10         "\t\t\t\"name\": \"%s\",\n"
  11         "\t\t\t\"type\": \"%s\",\n"
  12         "\t\t\t\"family\": \"%s\",\n"
  13         "\t\t\t\"context\": \"%s\",\n"
  14         "\t\t\t\"title\": \"%s\",\n"
  15         "\t\t\t\"priority\": %ld,\n"
  16         "\t\t\t\"enabled\": %s,\n"
  17         "\t\t\t\"units\": \"%s\",\n"
  18         "\t\t\t\"data_url\": \"/api/v1/data?chart=%s\",\n"
  19         "\t\t\t\"chart_type\": \"%s\",\n"
  20         "\t\t\t\"duration\": %ld,\n"
  21         "\t\t\t\"first_entry\": %ld,\n"
  22         "\t\t\t\"last_entry\": %ld,\n"
  23         "\t\t\t\"update_every\": %d,\n"
  24         "\t\t\t\"dimensions\": {\n"
  25         , st->id
  26         , st->name
  27         , st->type
  28         , st->family
  29         , st->context
  30         , st->title
  31         , st->priority
  32         , st->enabled?"true":"false"
  33         , st->units
  34         , st->name
  35         , rrdset_type_name(st->chart_type)
  36         , st->entries * st->update_every
  37         , rrdset_first_entry_t(st)
  38         , rrdset_last_entry_t(st)
  39         , st->update_every
  40         );
  41
  42     unsigned long memory = st->memsize;
  43
  44     size_t dimensions = 0;
  45     RRDDIM *rd;
  46     for(rd = st->dimensions; rd ; rd = rd->next) {
  47         if(rd->flags & RRDDIM_FLAG_HIDDEN) continue;
  48
  49         memory += rd->memsize;
  50
  51         buffer_sprintf(wb,
  52             "%s"
  53             "\t\t\t\t\"%s\": { \"name\": \"%s\" }"
  54             , dimensions?",\n":""
  55             , rd->id
  56             , rd->name
  57             );
  58
  59         dimensions++;
  60     }
  61
  62     if(dimensions_count) *dimensions_count += dimensions;
  63     if(memory_used) *memory_used += memory;
  64
  65     buffer_strcat(wb, "\n\t\t\t},\n\t\t\t\"green\": ");
  66     buffer_rrd_value(wb, st->green);
  67     buffer_strcat(wb, ",\n\t\t\t\"red\": ");
  68     buffer_rrd_value(wb, st->red);
  69
  70     buffer_sprintf(wb,
  71         "\n\t\t}"
  72         );
  73
  74     pthread_rwlock_unlock(&st->rwlock);
  75 }
  76
  77 void rrd_stats_api_v1_chart(RRDSET *st, BUFFER *wb) {
  78     rrd_stats_api_v1_chart_with_data(st, wb, NULL, NULL);
  79 }
  80
  81 void rrd_stats_api_v1_charts(BUFFER *wb)
  82 {
  83     size_t c, dimensions = 0, memory = 0, alarms = 0;
  84     RRDSET *st;
  85
  86     buffer_sprintf(wb, "{\n"
  87            "\t\"hostname\": \"%s\""
  88         ",\n\t\"version\": \"%s\""
  89         ",\n\t\"os\": \"%s\""
  90         ",\n\t\"update_every\": %d"
  91         ",\n\t\"history\": %d"
  92         ",\n\t\"charts\": {"
  93         , localhost.hostname
  94         , program_version
  95         , os_type
  96         , rrd_update_every
  97         , rrd_default_history_entries
  98         );
  99
 100     pthread_rwlock_rdlock(&localhost.rrdset_root_rwlock);
 101     for(st = localhost.rrdset_root, c = 0; st ; st = st->next) {
 102         if(st->enabled && st->dimensions) {
 103             if(c) buffer_strcat(wb, ",");
 104             buffer_strcat(wb, "\n\t\t\"");
 105             buffer_strcat(wb, st->id);
 106             buffer_strcat(wb, "\": ");
 107             rrd_stats_api_v1_chart_with_data(st, wb, &dimensions, &memory);
 108             c++;
 109         }
 110     }
 111
 112     RRDCALC *rc;
 113     for(rc = localhost.alarms; rc ; rc = rc->next) {
 114         if(rc->rrdset)
 115             alarms++;
 116     }
 117     pthread_rwlock_unlock(&localhost.rrdset_root_rwlock);
 118
 119     buffer_sprintf(wb, "\n\t}"
 120                     ",\n\t\"charts_count\": %zu"
 121                     ",\n\t\"dimensions_count\": %zu"
 122                     ",\n\t\"alarms_count\": %zu"
 123                     ",\n\t\"rrd_memory_bytes\": %zu"
 124                     "\n}\n"
 125                    , c
 126                    , dimensions
 127                    , alarms
 128                    , memory
 129     );
 130 }
 131
 132 // ----------------------------------------------------------------------------
 133 // PROMETHEUS
 134 // /api/v1/allmetrics?format=prometheus
 135
 136 static inline size_t prometheus_name_copy(char *d, const char *s, size_t usable) {
 137     size_t n;
 138
 139     for(n = 0; *s && n < usable ; d++, s++, n++) {
 140         register char c = *s;
 141
 142         if(unlikely(!isalnum(c))) *d = '_';
 143         else *d = c;
 144     }
 145     *d = '\0';
 146
 147     return n;
 148 }
 149
 150 #define PROMETHEUS_ELEMENT_MAX 256
 151
 152 void rrd_stats_api_v1_charts_allmetrics_prometheus(BUFFER *wb)
 153 {
 154     pthread_rwlock_rdlock(&localhost.rrdset_root_rwlock);
 155
 156     char host[PROMETHEUS_ELEMENT_MAX + 1];
 157     prometheus_name_copy(host, config_get("global", "hostname", "localhost"), PROMETHEUS_ELEMENT_MAX);
 158
 159     // for each chart
 160     RRDSET *st;
 161     for(st = localhost.rrdset_root; st ; st = st->next) {
 162         char chart[PROMETHEUS_ELEMENT_MAX + 1];
 163         prometheus_name_copy(chart, st->id, PROMETHEUS_ELEMENT_MAX);
 164
 165         buffer_strcat(wb, "\n");
 166         if(st->enabled && st->dimensions) {
 167             pthread_rwlock_rdlock(&st->rwlock);
 168
 169             // for each dimension
 170             RRDDIM *rd;
 171             for(rd = st->dimensions; rd ; rd = rd->next) {
 172                 if(rd->counter) {
 173                     char dimension[PROMETHEUS_ELEMENT_MAX + 1];
 174                     prometheus_name_copy(dimension, rd->id, PROMETHEUS_ELEMENT_MAX);
 175
 176                     // buffer_sprintf(wb, "# HELP %s.%s %s\n", st->id, rd->id, st->units);
 177
 178                     switch(rd->algorithm) {
 179                         case RRDDIM_INCREMENTAL:
 180                         case RRDDIM_PCENT_OVER_DIFF_TOTAL:
 181                             buffer_sprintf(wb, "# TYPE %s_%s counter\n", chart, dimension);
 182                             break;
 183
 184                         default:
 185                             buffer_sprintf(wb, "# TYPE %s_%s gauge\n", chart, dimension);
 186                             break;
 187                     }
 188
 189                     // calculated_number n = (calculated_number)rd->last_collected_value * (calculated_number)(abs(rd->multiplier)) / (calculated_number)(abs(rd->divisor));
 190                     // buffer_sprintf(wb, "%s.%s " CALCULATED_NUMBER_FORMAT " %llu\n", st->id, rd->id, n,
 191                     //        (unsigned long long)((rd->last_collected_time.tv_sec * 1000) + (rd->last_collected_time.tv_usec / 1000)));
 192
 193                     buffer_sprintf(wb, "%s_%s{instance=\"%s\"} " COLLECTED_NUMBER_FORMAT " %llu\n",
 194                             chart, dimension, host, rd->last_collected_value,
 195                             (unsigned long long)((rd->last_collected_time.tv_sec * 1000) + (rd->last_collected_time.tv_usec / 1000)));
 196
 197                 }
 198             }
 199
 200             pthread_rwlock_unlock(&st->rwlock);
 201         }
 202     }
 203
 204     pthread_rwlock_unlock(&localhost.rrdset_root_rwlock);
 205 }
 206
 207 // ----------------------------------------------------------------------------
 208 // BASH
 209 // /api/v1/allmetrics?format=bash
 210
 211 static inline size_t shell_name_copy(char *d, const char *s, size_t usable) {
 212     size_t n;
 213
 214     for(n = 0; *s && n < usable ; d++, s++, n++) {
 215         register char c = *s;
 216
 217         if(unlikely(!isalnum(c))) *d = '_';
 218         else *d = (char)toupper(c);
 219     }
 220     *d = '\0';
 221
 222     return n;
 223 }
 224
 225 #define SHELL_ELEMENT_MAX 100
 226
 227 void rrd_stats_api_v1_charts_allmetrics_shell(BUFFER *wb)
 228 {
 229     pthread_rwlock_rdlock(&localhost.rrdset_root_rwlock);
 230
 231     char host[SHELL_ELEMENT_MAX + 1];
 232     shell_name_copy(host, config_get("global", "hostname", "localhost"), SHELL_ELEMENT_MAX);
 233
 234     // for each chart
 235     RRDSET *st;
 236     for(st = localhost.rrdset_root; st ; st = st->next) {
 237         calculated_number total = 0.0;
 238         char chart[SHELL_ELEMENT_MAX + 1];
 239         shell_name_copy(chart, st->id, SHELL_ELEMENT_MAX);
 240
 241         buffer_sprintf(wb, "\n# chart: %s (name: %s)\n", st->id, st->name);
 242         if(st->enabled && st->dimensions) {
 243             pthread_rwlock_rdlock(&st->rwlock);
 244
 245             // for each dimension
 246             RRDDIM *rd;
 247             for(rd = st->dimensions; rd ; rd = rd->next) {
 248                 if(rd->counter) {
 249                     char dimension[SHELL_ELEMENT_MAX + 1];
 250                     shell_name_copy(dimension, rd->id, SHELL_ELEMENT_MAX);
 251
 252                     calculated_number n = rd->last_stored_value;
 253
 254                     if(isnan(n) || isinf(n))
 255                         buffer_sprintf(wb, "NETDATA_%s_%s=\"\"      # %s\n", chart, dimension, st->units);
 256                     else {
 257                         if(rd->multiplier < 0 || rd->divisor < 0) n = -n;
 258                         n = roundl(n);
 259                         if(!(rd->flags & RRDDIM_FLAG_HIDDEN)) total += n;
 260                         buffer_sprintf(wb, "NETDATA_%s_%s=\"%0.0Lf\"      # %s\n", chart, dimension, n, st->units);
 261                     }
 262                 }
 263             }
 264
 265             total = roundl(total);
 266             buffer_sprintf(wb, "NETDATA_%s_VISIBLETOTAL=\"%0.0Lf\"      # %s\n", chart, total, st->units);
 267             pthread_rwlock_unlock(&st->rwlock);
 268         }
 269     }
 270
 271     buffer_strcat(wb, "\n# NETDATA ALARMS RUNNING\n");
 272
 273     RRDCALC *rc;
 274     for(rc = localhost.alarms; rc ;rc = rc->next) {
 275         if(!rc->rrdset) continue;
 276
 277         char chart[SHELL_ELEMENT_MAX + 1];
 278         shell_name_copy(chart, rc->rrdset->id, SHELL_ELEMENT_MAX);
 279
 280         char alarm[SHELL_ELEMENT_MAX + 1];
 281         shell_name_copy(alarm, rc->name, SHELL_ELEMENT_MAX);
 282
 283         calculated_number n = rc->value;
 284
 285         if(isnan(n) || isinf(n))
 286             buffer_sprintf(wb, "NETDATA_ALARM_%s_%s_VALUE=\"\"      # %s\n", chart, alarm, rc->units);
 287         else {
 288             n = roundl(n);
 289             buffer_sprintf(wb, "NETDATA_ALARM_%s_%s_VALUE=\"%0.0Lf\"      # %s\n", chart, alarm, n, rc->units);
 290         }
 291
 292         buffer_sprintf(wb, "NETDATA_ALARM_%s_%s_STATUS=\"%s\"\n", chart, alarm, rrdcalc_status2string(rc->status));
 293     }
 294
 295     pthread_rwlock_unlock(&localhost.rrdset_root_rwlock);
 296 }
 297
 298 // ----------------------------------------------------------------------------
 299
 300 unsigned long rrd_stats_one_json(RRDSET *st, char *options, BUFFER *wb)
 301 {
 302     time_t now = now_realtime_sec();
 303
 304     pthread_rwlock_rdlock(&st->rwlock);
 305
 306     buffer_sprintf(wb,
 307         "\t\t{\n"
 308         "\t\t\t\"id\": \"%s\",\n"
 309         "\t\t\t\"name\": \"%s\",\n"
 310         "\t\t\t\"type\": \"%s\",\n"
 311         "\t\t\t\"family\": \"%s\",\n"
 312         "\t\t\t\"context\": \"%s\",\n"
 313         "\t\t\t\"title\": \"%s\",\n"
 314         "\t\t\t\"priority\": %ld,\n"
 315         "\t\t\t\"enabled\": %d,\n"
 316         "\t\t\t\"units\": \"%s\",\n"
 317         "\t\t\t\"url\": \"/data/%s/%s\",\n"
 318         "\t\t\t\"chart_type\": \"%s\",\n"
 319         "\t\t\t\"counter\": %lu,\n"
 320         "\t\t\t\"entries\": %ld,\n"
 321         "\t\t\t\"first_entry_t\": %ld,\n"
 322         "\t\t\t\"last_entry\": %lu,\n"
 323         "\t\t\t\"last_entry_t\": %ld,\n"
 324         "\t\t\t\"last_entry_secs_ago\": %ld,\n"
 325         "\t\t\t\"update_every\": %d,\n"
 326         "\t\t\t\"isdetail\": %d,\n"
 327         "\t\t\t\"usec_since_last_update\": %llu,\n"
 328         "\t\t\t\"collected_total\": " TOTAL_NUMBER_FORMAT ",\n"
 329         "\t\t\t\"last_collected_total\": " TOTAL_NUMBER_FORMAT ",\n"
 330         "\t\t\t\"dimensions\": [\n"
 331         , st->id
 332         , st->name
 333         , st->type
 334         , st->family
 335         , st->context
 336         , st->title
 337         , st->priority
 338         , st->enabled
 339         , st->units
 340         , st->name, options?options:""
 341         , rrdset_type_name(st->chart_type)
 342         , st->counter
 343         , st->entries
 344         , rrdset_first_entry_t(st)
 345         , rrdset_last_slot(st)
 346         , rrdset_last_entry_t(st)
 347         , (now < rrdset_last_entry_t(st)) ? (time_t)0 : now - rrdset_last_entry_t(st)
 348         , st->update_every
 349         , st->isdetail
 350         , st->usec_since_last_update
 351         , st->collected_total
 352         , st->last_collected_total
 353         );
 354
 355     unsigned long memory = st->memsize;
 356
 357     RRDDIM *rd;
 358     for(rd = st->dimensions; rd ; rd = rd->next) {
 359
 360         memory += rd->memsize;
 361
 362         buffer_sprintf(wb,
 363             "\t\t\t\t{\n"
 364             "\t\t\t\t\t\"id\": \"%s\",\n"
 365             "\t\t\t\t\t\"name\": \"%s\",\n"
 366             "\t\t\t\t\t\"entries\": %ld,\n"
 367             "\t\t\t\t\t\"isHidden\": %d,\n"
 368             "\t\t\t\t\t\"algorithm\": \"%s\",\n"
 369             "\t\t\t\t\t\"multiplier\": %ld,\n"
 370             "\t\t\t\t\t\"divisor\": %ld,\n"
 371             "\t\t\t\t\t\"last_entry_t\": %ld,\n"
 372             "\t\t\t\t\t\"collected_value\": " COLLECTED_NUMBER_FORMAT ",\n"
 373             "\t\t\t\t\t\"calculated_value\": " CALCULATED_NUMBER_FORMAT ",\n"
 374             "\t\t\t\t\t\"last_collected_value\": " COLLECTED_NUMBER_FORMAT ",\n"
 375             "\t\t\t\t\t\"last_calculated_value\": " CALCULATED_NUMBER_FORMAT ",\n"
 376             "\t\t\t\t\t\"memory\": %lu\n"
 377             "\t\t\t\t}%s\n"
 378             , rd->id
 379             , rd->name
 380             , rd->entries
 381             , (rd->flags & RRDDIM_FLAG_HIDDEN)?1:0
 382             , rrddim_algorithm_name(rd->algorithm)
 383             , rd->multiplier
 384             , rd->divisor
 385             , rd->last_collected_time.tv_sec
 386             , rd->collected_value
 387             , rd->calculated_value
 388             , rd->last_collected_value
 389             , rd->last_calculated_value
 390             , rd->memsize
 391             , rd->next?",":""
 392             );
 393     }
 394
 395     buffer_sprintf(wb,
 396         "\t\t\t],\n"
 397         "\t\t\t\"memory\" : %lu\n"
 398         "\t\t}"
 399         , memory
 400         );
 401
 402     pthread_rwlock_unlock(&st->rwlock);
 403     return memory;
 404 }
 405
 406 #define RRD_GRAPH_JSON_HEADER "{\n\t\"charts\": [\n"
 407 #define RRD_GRAPH_JSON_FOOTER "\n\t]\n}\n"
 408
 409 void rrd_stats_graph_json(RRDSET *st, char *options, BUFFER *wb)
 410 {
 411     buffer_strcat(wb, RRD_GRAPH_JSON_HEADER);
 412     rrd_stats_one_json(st, options, wb);
 413     buffer_strcat(wb, RRD_GRAPH_JSON_FOOTER);
 414 }
 415
 416 void rrd_stats_all_json(BUFFER *wb)
 417 {
 418     unsigned long memory = 0;
 419     long c;
 420     RRDSET *st;
 421
 422     buffer_strcat(wb, RRD_GRAPH_JSON_HEADER);
 423
 424     pthread_rwlock_rdlock(&localhost.rrdset_root_rwlock);
 425     for(st = localhost.rrdset_root, c = 0; st ; st = st->next) {
 426         if(st->enabled && st->dimensions) {
 427             if(c) buffer_strcat(wb, ",\n");
 428             memory += rrd_stats_one_json(st, NULL, wb);
 429             c++;
 430         }
 431     }
 432     pthread_rwlock_unlock(&localhost.rrdset_root_rwlock);
 433
 434     buffer_sprintf(wb, "\n\t],\n"
 435         "\t\"hostname\": \"%s\",\n"
 436         "\t\"update_every\": %d,\n"
 437         "\t\"history\": %d,\n"
 438         "\t\"memory\": %lu\n"
 439         "}\n"
 440         , localhost.hostname
 441         , rrd_update_every
 442         , rrd_default_history_entries
 443         , memory
 444         );
 445 }
 446
 447
 448
 449 // ----------------------------------------------------------------------------
 450
 451 // RRDR dimension options
 452 #define RRDR_EMPTY      0x01 // the dimension contains / the value is empty (null)
 453 #define RRDR_RESET      0x02 // the dimension contains / the value is reset
 454 #define RRDR_HIDDEN     0x04 // the dimension contains / the value is hidden
 455 #define RRDR_NONZERO    0x08 // the dimension contains / the value is non-zero
 456 #define RRDR_SELECTED   0x10 // the dimension is selected
 457
 458 // RRDR result options
 459 #define RRDR_RESULT_OPTION_ABSOLUTE 0x00000001
 460 #define RRDR_RESULT_OPTION_RELATIVE 0x00000002
 461
 462 typedef struct rrdresult {
 463     RRDSET *st;         // the chart this result refers to
 464
 465     uint32_t result_options;    // RRDR_RESULT_OPTION_*
 466
 467     int d;                  // the number of dimensions
 468     long n;                 // the number of values in the arrays
 469     long rows;              // the number of rows used
 470
 471     uint8_t *od;            // the options for the dimensions
 472
 473     time_t *t;              // array of n timestamps
 474     calculated_number *v;   // array n x d values
 475     uint8_t *o;             // array n x d options
 476
 477     long c;                 // current line ( -1 ~ n ), ( -1 = none, use rrdr_rows() to get number of rows )
 478
 479     long group;             // how many collected values were grouped for each row
 480     int update_every;       // what is the suggested update frequency in seconds
 481
 482     calculated_number min;
 483     calculated_number max;
 484
 485     time_t before;
 486     time_t after;
 487
 488     int has_st_lock;        // if st is read locked by us
 489 } RRDR;
 490
 491 #define rrdr_rows(r) ((r)->rows)
 492
 493 /*
 494 static void rrdr_dump(RRDR *r)
 495 {
 496     long c, i;
 497     RRDDIM *d;
 498
 499     fprintf(stderr, "\nCHART %s (%s)\n", r->st->id, r->st->name);
 500
 501     for(c = 0, d = r->st->dimensions; d ;c++, d = d->next) {
 502         fprintf(stderr, "DIMENSION %s (%s), %s%s%s%s\n"
 503                 , d->id
 504                 , d->name
 505                 , (r->od[c] & RRDR_EMPTY)?"EMPTY ":""
 506                 , (r->od[c] & RRDR_RESET)?"RESET ":""
 507                 , (r->od[c] & RRDR_HIDDEN)?"HIDDEN ":""
 508                 , (r->od[c] & RRDR_NONZERO)?"NONZERO ":""
 509                 );
 510     }
 511
 512     if(r->rows <= 0) {
 513         fprintf(stderr, "RRDR does not have any values in it.\n");
 514         return;
 515     }
 516
 517     fprintf(stderr, "RRDR includes %d values in it:\n", r->rows);
 518
 519     // for each line in the array
 520     for(i = 0; i < r->rows ;i++) {
 521         calculated_number *cn = &r->v[ i * r->d ];
 522         uint8_t *co = &r->o[ i * r->d ];
 523
 524         // print the id and the timestamp of the line
 525         fprintf(stderr, "%ld %ld ", i + 1, r->t[i]);
 526
 527         // for each dimension
 528         for(c = 0, d = r->st->dimensions; d ;c++, d = d->next) {
 529             if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 530             if(unlikely(!(r->od[c] & RRDR_NONZERO))) continue;
 531
 532             if(co[c] & RRDR_EMPTY)
 533                 fprintf(stderr, "null ");
 534             else
 535                 fprintf(stderr, CALCULATED_NUMBER_FORMAT " %s%s%s%s "
 536                     , cn[c]
 537                     , (co[c] & RRDR_EMPTY)?"E":" "
 538                     , (co[c] & RRDR_RESET)?"R":" "
 539                     , (co[c] & RRDR_HIDDEN)?"H":" "
 540                     , (co[c] & RRDR_NONZERO)?"N":" "
 541                     );
 542         }
 543
 544         fprintf(stderr, "\n");
 545     }
 546 }
 547 */
 548
 549 void rrdr_disable_not_selected_dimensions(RRDR *r, uint32_t options, const char *dims)
 550 {
 551     if(unlikely(!dims || !*dims)) return;
 552
 553     char b[strlen(dims) + 1];
 554     char *o = b, *tok;
 555     strcpy(o, dims);
 556
 557     long c, dims_selected = 0, dims_not_hidden_not_zero = 0;
 558     RRDDIM *d;
 559
 560     // disable all of them
 561     for(c = 0, d = r->st->dimensions; d ;c++, d = d->next)
 562         r->od[c] |= RRDR_HIDDEN;
 563
 564     while(o && *o && (tok = mystrsep(&o, ",|"))) {
 565         if(!*tok) continue;
 566
 567         uint32_t hash = simple_hash(tok);
 568
 569         // find it and enable it
 570         for(c = 0, d = r->st->dimensions; d ;c++, d = d->next) {
 571             if(unlikely((hash == d->hash && !strcmp(d->id, tok)) || !strcmp(d->name, tok))) {
 572
 573                 if(likely(r->od[c] & RRDR_HIDDEN)) {
 574                     r->od[c] |= RRDR_SELECTED;
 575                     r->od[c] &= ~RRDR_HIDDEN;
 576                     dims_selected++;
 577                 }
 578
 579                 // since the user needs this dimension
 580                 // make it appear as NONZERO, to return it
 581                 // even if the dimension has only zeros
 582                 // unless option non_zero is set
 583                 if(likely(!(options & RRDR_OPTION_NONZERO)))
 584                     r->od[c] |= RRDR_NONZERO;
 585
 586                 // count the visible dimensions
 587                 if(likely(r->od[c] & RRDR_NONZERO))
 588                     dims_not_hidden_not_zero++;
 589             }
 590         }
 591     }
 592
 593     // check if all dimensions are hidden
 594     if(unlikely(!dims_not_hidden_not_zero && dims_selected)) {
 595         // there are a few selected dimensions
 596         // but they are all zero
 597         // enable the selected ones
 598         // to avoid returning an empty chart
 599         for(c = 0, d = r->st->dimensions; d ;c++, d = d->next)
 600             if(unlikely(r->od[c] & RRDR_SELECTED))
 601                 r->od[c] |= RRDR_NONZERO;
 602     }
 603 }
 604
 605 void rrdr_buffer_print_format(BUFFER *wb, uint32_t format)
 606 {
 607     switch(format) {
 608     case DATASOURCE_JSON:
 609         buffer_strcat(wb, DATASOURCE_FORMAT_JSON);
 610         break;
 611
 612     case DATASOURCE_DATATABLE_JSON:
 613         buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSON);
 614         break;
 615
 616     case DATASOURCE_DATATABLE_JSONP:
 617         buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSONP);
 618         break;
 619
 620     case DATASOURCE_JSONP:
 621         buffer_strcat(wb, DATASOURCE_FORMAT_JSONP);
 622         break;
 623
 624     case DATASOURCE_SSV:
 625         buffer_strcat(wb, DATASOURCE_FORMAT_SSV);
 626         break;
 627
 628     case DATASOURCE_CSV:
 629         buffer_strcat(wb, DATASOURCE_FORMAT_CSV);
 630         break;
 631
 632     case DATASOURCE_TSV:
 633         buffer_strcat(wb, DATASOURCE_FORMAT_TSV);
 634         break;
 635
 636     case DATASOURCE_HTML:
 637         buffer_strcat(wb, DATASOURCE_FORMAT_HTML);
 638         break;
 639
 640     case DATASOURCE_JS_ARRAY:
 641         buffer_strcat(wb, DATASOURCE_FORMAT_JS_ARRAY);
 642         break;
 643
 644     case DATASOURCE_SSV_COMMA:
 645         buffer_strcat(wb, DATASOURCE_FORMAT_SSV_COMMA);
 646         break;
 647
 648     default:
 649         buffer_strcat(wb, "unknown");
 650         break;
 651     }
 652 }
 653
 654 uint32_t rrdr_check_options(RRDR *r, uint32_t options, const char *dims)
 655 {
 656     (void)dims;
 657
 658     if(options & RRDR_OPTION_NONZERO) {
 659         long i;
 660
 661         // commented due to #1514
 662
 663         //if(dims && *dims) {
 664             // the caller wants specific dimensions
 665             // disable NONZERO option
 666             // to make sure we don't accidentally prevent
 667             // the specific dimensions from being returned
 668             // i = 0;
 669         //}
 670         //else {
 671             // find how many dimensions are not zero
 672             long c;
 673             RRDDIM *rd;
 674             for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ; c++, rd = rd->next) {
 675                 if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 676                 if(unlikely(!(r->od[c] & RRDR_NONZERO))) continue;
 677                 i++;
 678             }
 679         //}
 680
 681         // if with nonzero we get i = 0 (no dimensions will be returned)
 682         // disable nonzero to show all dimensions
 683         if(!i) options &= ~RRDR_OPTION_NONZERO;
 684     }
 685
 686     return options;
 687 }
 688
 689 void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, uint32_t options, int string_value)
 690 {
 691     long rows = rrdr_rows(r);
 692     long c, i;
 693     RRDDIM *rd;
 694
 695     //info("JSONWRAPPER(): %s: BEGIN", r->st->id);
 696     char kq[2] = "",                    // key quote
 697         sq[2] = "";                     // string quote
 698
 699     if( options & RRDR_OPTION_GOOGLE_JSON ) {
 700         kq[0] = '\0';
 701         sq[0] = '\'';
 702     }
 703     else {
 704         kq[0] = '"';
 705         sq[0] = '"';
 706     }
 707
 708     buffer_sprintf(wb, "{\n"
 709             "   %sapi%s: 1,\n"
 710             "   %sid%s: %s%s%s,\n"
 711             "   %sname%s: %s%s%s,\n"
 712             "   %sview_update_every%s: %d,\n"
 713             "   %supdate_every%s: %d,\n"
 714             "   %sfirst_entry%s: %u,\n"
 715             "   %slast_entry%s: %u,\n"
 716             "   %sbefore%s: %u,\n"
 717             "   %safter%s: %u,\n"
 718             "   %sdimension_names%s: ["
 719             , kq, kq
 720             , kq, kq, sq, r->st->id, sq
 721             , kq, kq, sq, r->st->name, sq
 722             , kq, kq, r->update_every
 723             , kq, kq, r->st->update_every
 724             , kq, kq, (uint32_t)rrdset_first_entry_t(r->st)
 725             , kq, kq, (uint32_t)rrdset_last_entry_t(r->st)
 726             , kq, kq, (uint32_t)r->before
 727             , kq, kq, (uint32_t)r->after
 728             , kq, kq);
 729
 730     for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 731         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 732         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 733
 734         if(i) buffer_strcat(wb, ", ");
 735         buffer_strcat(wb, sq);
 736         buffer_strcat(wb, rd->name);
 737         buffer_strcat(wb, sq);
 738         i++;
 739     }
 740     if(!i) {
 741 #ifdef NETDATA_INTERNAL_CHECKS
 742         error("RRDR is empty for %s (RRDR has %d dimensions, options is 0x%08x)", r->st->id, r->d, options);
 743 #endif
 744         rows = 0;
 745         buffer_strcat(wb, sq);
 746         buffer_strcat(wb, "no data");
 747         buffer_strcat(wb, sq);
 748     }
 749
 750     buffer_sprintf(wb, "],\n"
 751             "   %sdimension_ids%s: ["
 752             , kq, kq);
 753
 754     for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 755         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 756         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 757
 758         if(i) buffer_strcat(wb, ", ");
 759         buffer_strcat(wb, sq);
 760         buffer_strcat(wb, rd->id);
 761         buffer_strcat(wb, sq);
 762         i++;
 763     }
 764     if(!i) {
 765         rows = 0;
 766         buffer_strcat(wb, sq);
 767         buffer_strcat(wb, "no data");
 768         buffer_strcat(wb, sq);
 769     }
 770
 771     buffer_sprintf(wb, "],\n"
 772             "   %slatest_values%s: ["
 773             , kq, kq);
 774
 775     for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 776         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 777         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 778
 779         if(i) buffer_strcat(wb, ", ");
 780         i++;
 781
 782         storage_number n = rd->values[rrdset_last_slot(r->st)];
 783
 784         if(!does_storage_number_exist(n))
 785             buffer_strcat(wb, "null");
 786         else
 787             buffer_rrd_value(wb, unpack_storage_number(n));
 788     }
 789     if(!i) {
 790         rows = 0;
 791         buffer_strcat(wb, "null");
 792     }
 793
 794     buffer_sprintf(wb, "],\n"
 795             "   %sview_latest_values%s: ["
 796             , kq, kq);
 797
 798     i = 0;
 799     if(rows) {
 800         for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 801             if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 802             if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 803
 804             if(i) buffer_strcat(wb, ", ");
 805             i++;
 806
 807             calculated_number *cn = &r->v[ (0) * r->d ];
 808             uint8_t *co = &r->o[ (0) * r->d ];
 809
 810             if(co[c] & RRDR_EMPTY)
 811                 buffer_strcat(wb, "null");
 812             else
 813                 buffer_rrd_value(wb, cn[c]);
 814         }
 815     }
 816     if(!i) {
 817         rows = 0;
 818         buffer_strcat(wb, "null");
 819     }
 820
 821     buffer_sprintf(wb, "],\n"
 822             "   %sdimensions%s: %ld,\n"
 823             "   %spoints%s: %ld,\n"
 824             "   %sformat%s: %s"
 825             , kq, kq, i
 826             , kq, kq, rows
 827             , kq, kq, sq
 828             );
 829
 830     rrdr_buffer_print_format(wb, format);
 831
 832     buffer_sprintf(wb, "%s,\n"
 833             "   %sresult%s: "
 834             , sq
 835             , kq, kq
 836             );
 837
 838     if(string_value) buffer_strcat(wb, sq);
 839     //info("JSONWRAPPER(): %s: END", r->st->id);
 840 }
 841
 842 void rrdr_json_wrapper_end(RRDR *r, BUFFER *wb, uint32_t format, uint32_t options, int string_value)
 843 {
 844     (void)format;
 845
 846     char kq[2] = "",                    // key quote
 847         sq[2] = "";                     // string quote
 848
 849     if( options & RRDR_OPTION_GOOGLE_JSON ) {
 850         kq[0] = '\0';
 851         sq[0] = '\'';
 852     }
 853     else {
 854         kq[0] = '"';
 855         sq[0] = '"';
 856     }
 857
 858     if(string_value) buffer_strcat(wb, sq);
 859
 860     buffer_sprintf(wb, ",\n %smin%s: ", kq, kq);
 861     buffer_rrd_value(wb, r->min);
 862     buffer_sprintf(wb, ",\n %smax%s: ", kq, kq);
 863     buffer_rrd_value(wb, r->max);
 864     buffer_strcat(wb, "\n}\n");
 865 }
 866
 867 #define JSON_DATES_JS 1
 868 #define JSON_DATES_TIMESTAMP 2
 869
 870 static void rrdr2json(RRDR *r, BUFFER *wb, uint32_t options, int datatable)
 871 {
 872     //info("RRD2JSON(): %s: BEGIN", r->st->id);
 873     int row_annotations = 0, dates, dates_with_new = 0;
 874     char kq[2] = "",                    // key quote
 875         sq[2] = "",                     // string quote
 876         pre_label[101] = "",            // before each label
 877         post_label[101] = "",           // after each label
 878         pre_date[101] = "",             // the beginning of line, to the date
 879         post_date[101] = "",            // closing the date
 880         pre_value[101] = "",            // before each value
 881         post_value[101] = "",           // after each value
 882         post_line[101] = "",            // at the end of each row
 883         normal_annotation[201] = "",    // default row annotation
 884         overflow_annotation[201] = "",  // overflow row annotation
 885         data_begin[101] = "",           // between labels and values
 886         finish[101] = "";               // at the end of everything
 887
 888     if(datatable) {
 889         dates = JSON_DATES_JS;
 890         if( options & RRDR_OPTION_GOOGLE_JSON ) {
 891             kq[0] = '\0';
 892             sq[0] = '\'';
 893         }
 894         else {
 895             kq[0] = '"';
 896             sq[0] = '"';
 897         }
 898         row_annotations = 1;
 899         snprintfz(pre_date,   100, "        {%sc%s:[{%sv%s:%s", kq, kq, kq, kq, sq);
 900         snprintfz(post_date,  100, "%s}", sq);
 901         snprintfz(pre_label,  100, ",\n     {%sid%s:%s%s,%slabel%s:%s", kq, kq, sq, sq, kq, kq, sq);
 902         snprintfz(post_label, 100, "%s,%spattern%s:%s%s,%stype%s:%snumber%s}", sq, kq, kq, sq, sq, kq, kq, sq, sq);
 903         snprintfz(pre_value,  100, ",{%sv%s:", kq, kq);
 904         strcpy(post_value,         "}");
 905         strcpy(post_line,          "]}");
 906         snprintfz(data_begin, 100, "\n  ],\n    %srows%s:\n [\n", kq, kq);
 907         strcpy(finish,             "\n  ]\n}");
 908
 909         snprintfz(overflow_annotation, 200, ",{%sv%s:%sRESET OR OVERFLOW%s},{%sv%s:%sThe counters have been wrapped.%s}", kq, kq, sq, sq, kq, kq, sq, sq);
 910         snprintfz(normal_annotation,   200, ",{%sv%s:null},{%sv%s:null}", kq, kq, kq, kq);
 911
 912         buffer_sprintf(wb, "{\n %scols%s:\n [\n", kq, kq);
 913         buffer_sprintf(wb, "        {%sid%s:%s%s,%slabel%s:%stime%s,%spattern%s:%s%s,%stype%s:%sdatetime%s},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq);
 914         buffer_sprintf(wb, "        {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotation%s}},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
 915         buffer_sprintf(wb, "        {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotationText%s}}", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
 916
 917         // remove the valueobjects flag
 918         // google wants its own keys
 919         if(options & RRDR_OPTION_OBJECTSROWS)
 920             options &= ~RRDR_OPTION_OBJECTSROWS;
 921     }
 922     else {
 923         kq[0] = '"';
 924         sq[0] = '"';
 925         if(options & RRDR_OPTION_GOOGLE_JSON) {
 926             dates = JSON_DATES_JS;
 927             dates_with_new = 1;
 928         }
 929         else {
 930             dates = JSON_DATES_TIMESTAMP;
 931             dates_with_new = 0;
 932         }
 933         if( options & RRDR_OPTION_OBJECTSROWS )
 934             strcpy(pre_date, "      { ");
 935         else
 936             strcpy(pre_date, "      [ ");
 937         strcpy(pre_label,  ", \"");
 938         strcpy(post_label, "\"");
 939         strcpy(pre_value,  ", ");
 940         if( options & RRDR_OPTION_OBJECTSROWS )
 941             strcpy(post_line, "}");
 942         else
 943             strcpy(post_line, "]");
 944         snprintfz(data_begin, 100, "],\n    %sdata%s:\n [\n", kq, kq);
 945         strcpy(finish,             "\n  ]\n}");
 946
 947         buffer_sprintf(wb, "{\n %slabels%s: [", kq, kq);
 948         buffer_sprintf(wb, "%stime%s", sq, sq);
 949     }
 950
 951     // -------------------------------------------------------------------------
 952     // print the JSON header
 953
 954     long c, i;
 955     RRDDIM *rd;
 956
 957     // print the header lines
 958     for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
 959         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
 960         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
 961
 962         buffer_strcat(wb, pre_label);
 963         buffer_strcat(wb, rd->name);
 964         buffer_strcat(wb, post_label);
 965         i++;
 966     }
 967     if(!i) {
 968         buffer_strcat(wb, pre_label);
 969         buffer_strcat(wb, "no data");
 970         buffer_strcat(wb, post_label);
 971     }
 972
 973     // print the begin of row data
 974     buffer_strcat(wb, data_begin);
 975
 976     // if all dimensions are hidden, print a null
 977     if(!i) {
 978         buffer_strcat(wb, finish);
 979         return;
 980     }
 981
 982     long start = 0, end = rrdr_rows(r), step = 1;
 983     if((options & RRDR_OPTION_REVERSED)) {
 984         start = rrdr_rows(r) - 1;
 985         end = -1;
 986         step = -1;
 987     }
 988
 989     // for each line in the array
 990     calculated_number total = 1;
 991     for(i = start; i != end ;i += step) {
 992         calculated_number *cn = &r->v[ i * r->d ];
 993         uint8_t *co = &r->o[ i * r->d ];
 994
 995         time_t now = r->t[i];
 996
 997         if(dates == JSON_DATES_JS) {
 998             // generate the local date time
 999             struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
1000             if(!tm) { error("localtime_r() failed."); continue; }
1001
1002             if(likely(i != start)) buffer_strcat(wb, ",\n");
1003             buffer_strcat(wb, pre_date);
1004
1005             if( options & RRDR_OPTION_OBJECTSROWS )
1006                 buffer_sprintf(wb, "%stime%s: ", kq, kq);
1007
1008             if(dates_with_new)
1009                 buffer_strcat(wb, "new ");
1010
1011             buffer_jsdate(wb, tm->tm_year + 1900, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
1012
1013             buffer_strcat(wb, post_date);
1014
1015             if(row_annotations) {
1016                 // google supports one annotation per row
1017                 int annotation_found = 0;
1018                 for(c = 0, rd = r->st->dimensions; rd ;c++, rd = rd->next) {
1019                     if(co[c] & RRDR_RESET) {
1020                         buffer_strcat(wb, overflow_annotation);
1021                         annotation_found = 1;
1022                         break;
1023                     }
1024                 }
1025                 if(!annotation_found)
1026                     buffer_strcat(wb, normal_annotation);
1027             }
1028         }
1029         else {
1030             // print the timestamp of the line
1031             if(likely(i != start)) buffer_strcat(wb, ",\n");
1032             buffer_strcat(wb, pre_date);
1033
1034             if( options & RRDR_OPTION_OBJECTSROWS )
1035                 buffer_sprintf(wb, "%stime%s: ", kq, kq);
1036
1037             buffer_rrd_value(wb, (calculated_number)r->t[i]);
1038             // in ms
1039             if(options & RRDR_OPTION_MILLISECONDS) buffer_strcat(wb, "000");
1040
1041             buffer_strcat(wb, post_date);
1042         }
1043
1044         if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
1045             total = 0;
1046             for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
1047                 calculated_number n = cn[c];
1048
1049                 if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1050                     n = -n;
1051
1052                 total += n;
1053             }
1054             // prevent a division by zero
1055             if(total == 0) total = 1;
1056         }
1057
1058         // for each dimension
1059         for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
1060             if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
1061             if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
1062
1063             calculated_number n = cn[c];
1064
1065             buffer_strcat(wb, pre_value);
1066
1067             if( options & RRDR_OPTION_OBJECTSROWS )
1068                 buffer_sprintf(wb, "%s%s%s: ", kq, rd->name, kq);
1069
1070             if(co[c] & RRDR_EMPTY) {
1071                 if(options & RRDR_OPTION_NULL2ZERO)
1072                     buffer_strcat(wb, "0");
1073                 else
1074                     buffer_strcat(wb, "null");
1075             }
1076             else {
1077                 if(unlikely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1078                     n = -n;
1079
1080                 if(unlikely(options & RRDR_OPTION_PERCENTAGE))
1081                     n = n * 100 / total;
1082
1083                 buffer_rrd_value(wb, n);
1084             }
1085
1086             buffer_strcat(wb, post_value);
1087         }
1088
1089         buffer_strcat(wb, post_line);
1090     }
1091
1092     buffer_strcat(wb, finish);
1093     //info("RRD2JSON(): %s: END", r->st->id);
1094 }
1095
1096 static void rrdr2csv(RRDR *r, BUFFER *wb, uint32_t options, const char *startline, const char *separator, const char *endline, const char *betweenlines)
1097 {
1098     //info("RRD2CSV(): %s: BEGIN", r->st->id);
1099     long c, i;
1100     RRDDIM *d;
1101
1102     // print the csv header
1103     for(c = 0, i = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1104         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
1105         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
1106
1107         if(!i) {
1108             buffer_strcat(wb, startline);
1109             if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
1110             buffer_strcat(wb, "time");
1111             if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
1112         }
1113         buffer_strcat(wb, separator);
1114         if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
1115         buffer_strcat(wb, d->name);
1116         if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
1117         i++;
1118     }
1119     buffer_strcat(wb, endline);
1120
1121     if(!i) {
1122         // no dimensions present
1123         return;
1124     }
1125
1126     long start = 0, end = rrdr_rows(r), step = 1;
1127     if((options & RRDR_OPTION_REVERSED)) {
1128         start = rrdr_rows(r) - 1;
1129         end = -1;
1130         step = -1;
1131     }
1132
1133     // for each line in the array
1134     calculated_number total = 1;
1135     for(i = start; i != end ;i += step) {
1136         calculated_number *cn = &r->v[ i * r->d ];
1137         uint8_t *co = &r->o[ i * r->d ];
1138
1139         buffer_strcat(wb, betweenlines);
1140         buffer_strcat(wb, startline);
1141
1142         time_t now = r->t[i];
1143
1144         if((options & RRDR_OPTION_SECONDS) || (options & RRDR_OPTION_MILLISECONDS)) {
1145             // print the timestamp of the line
1146             buffer_rrd_value(wb, (calculated_number)now);
1147             // in ms
1148             if(options & RRDR_OPTION_MILLISECONDS) buffer_strcat(wb, "000");
1149         }
1150         else {
1151             // generate the local date time
1152             struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
1153             if(!tm) { error("localtime() failed."); continue; }
1154             buffer_date(wb, tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
1155         }
1156
1157         if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
1158             total = 0;
1159             for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1160                 calculated_number n = cn[c];
1161
1162                 if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1163                     n = -n;
1164
1165                 total += n;
1166             }
1167             // prevent a division by zero
1168             if(total == 0) total = 1;
1169         }
1170
1171         // for each dimension
1172         for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1173             if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
1174             if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
1175
1176             buffer_strcat(wb, separator);
1177
1178             calculated_number n = cn[c];
1179
1180             if(co[c] & RRDR_EMPTY) {
1181                 if(options & RRDR_OPTION_NULL2ZERO)
1182                     buffer_strcat(wb, "0");
1183                 else
1184                     buffer_strcat(wb, "null");
1185             }
1186             else {
1187                 if(unlikely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1188                     n = -n;
1189
1190                 if(unlikely(options & RRDR_OPTION_PERCENTAGE))
1191                     n = n * 100 / total;
1192
1193                 buffer_rrd_value(wb, n);
1194             }
1195         }
1196
1197         buffer_strcat(wb, endline);
1198     }
1199     //info("RRD2CSV(): %s: END", r->st->id);
1200 }
1201
1202 inline static calculated_number rrdr2value(RRDR *r, long i, uint32_t options, int *all_values_are_null) {
1203     long c;
1204     RRDDIM *d;
1205
1206     calculated_number *cn = &r->v[ i * r->d ];
1207     uint8_t *co = &r->o[ i * r->d ];
1208
1209     calculated_number sum = 0, min = 0, max = 0, v;
1210     int all_null = 1, init = 1;
1211
1212     calculated_number total = 1;
1213     if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
1214         total = 0;
1215         for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1216             calculated_number n = cn[c];
1217
1218             if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1219                 n = -n;
1220
1221             total += n;
1222         }
1223         // prevent a division by zero
1224         if(total == 0) total = 1;
1225     }
1226
1227     // for each dimension
1228     for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
1229         if(unlikely(r->od[c] & RRDR_HIDDEN)) continue;
1230         if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_NONZERO))) continue;
1231
1232         calculated_number n = cn[c];
1233
1234         if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
1235             n = -n;
1236
1237         if(unlikely(options & RRDR_OPTION_PERCENTAGE))
1238             n = n * 100 / total;
1239
1240         if(unlikely(init)) {
1241             if(n > 0) {
1242                 min = 0;
1243                 max = n;
1244             }
1245             else {
1246                 min = n;
1247                 max = 0;
1248             }
1249             init = 0;
1250         }
1251
1252         if(likely(!(co[c] & RRDR_EMPTY))) {
1253             all_null = 0;
1254             sum += n;
1255         }
1256
1257         if(n < min) min = n;
1258         if(n > max) max = n;
1259     }
1260
1261     if(unlikely(all_null)) {
1262         if(likely(all_values_are_null))
1263             *all_values_are_null = 1;
1264         return 0;
1265     }
1266     else {
1267         if(likely(all_values_are_null))
1268             *all_values_are_null = 0;
1269     }
1270
1271     if(options & RRDR_OPTION_MIN2MAX)
1272         v = max - min;
1273     else
1274         v = sum;
1275
1276     return v;
1277 }
1278
1279 static void rrdr2ssv(RRDR *r, BUFFER *wb, uint32_t options, const char *prefix, const char *separator, const char *suffix)
1280 {
1281     //info("RRD2SSV(): %s: BEGIN", r->st->id);
1282     long i;
1283
1284     buffer_strcat(wb, prefix);
1285     long start = 0, end = rrdr_rows(r), step = 1;
1286     if((options & RRDR_OPTION_REVERSED)) {
1287         start = rrdr_rows(r) - 1;
1288         end = -1;
1289         step = -1;
1290     }
1291
1292     // for each line in the array
1293     for(i = start; i != end ;i += step) {
1294         int all_values_are_null = 0;
1295         calculated_number v = rrdr2value(r, i, options, &all_values_are_null);
1296
1297         if(likely(i != start)) {
1298             if(r->min > v) r->min = v;
1299             if(r->max < v) r->max = v;
1300         }
1301         else {
1302             r->min = v;
1303             r->max = v;
1304         }
1305
1306         if(likely(i != start))
1307             buffer_strcat(wb, separator);
1308
1309         if(all_values_are_null) {
1310             if(options & RRDR_OPTION_NULL2ZERO)
1311                 buffer_strcat(wb, "0");
1312             else
1313                 buffer_strcat(wb, "null");
1314         }
1315         else
1316             buffer_rrd_value(wb, v);
1317     }
1318     buffer_strcat(wb, suffix);
1319     //info("RRD2SSV(): %s: END", r->st->id);
1320 }
1321
1322 inline static calculated_number *rrdr_line_values(RRDR *r)
1323 {
1324     return &r->v[ r->c * r->d ];
1325 }
1326
1327 inline static uint8_t *rrdr_line_options(RRDR *r)
1328 {
1329     return &r->o[ r->c * r->d ];
1330 }
1331
1332 inline static int rrdr_line_init(RRDR *r, time_t t)
1333 {
1334     r->c++;
1335
1336     if(unlikely(r->c >= r->n)) {
1337         error("requested to step above RRDR size for chart %s", r->st->name);
1338         r->c = r->n - 1;
1339     }
1340
1341     // save the time
1342     r->t[r->c] = t;
1343
1344     return 1;
1345 }
1346
1347 inline static void rrdr_lock_rrdset(RRDR *r) {
1348     if(unlikely(!r)) {
1349         error("NULL value given!");
1350         return;
1351     }
1352
1353     pthread_rwlock_rdlock(&r->st->rwlock);
1354     r->has_st_lock = 1;
1355 }
1356
1357 inline static void rrdr_unlock_rrdset(RRDR *r) {
1358     if(unlikely(!r)) {
1359         error("NULL value given!");
1360         return;
1361     }
1362
1363     if(likely(r->has_st_lock)) {
1364         pthread_rwlock_unlock(&r->st->rwlock);
1365         r->has_st_lock = 0;
1366     }
1367 }
1368
1369 inline static void rrdr_free(RRDR *r)
1370 {
1371     if(unlikely(!r)) {
1372         error("NULL value given!");
1373         return;
1374     }
1375
1376     rrdr_unlock_rrdset(r);
1377     freez(r->t);
1378     freez(r->v);
1379     freez(r->o);
1380     freez(r->od);
1381     freez(r);
1382 }
1383
1384 static inline void rrdr_done(RRDR *r)
1385 {
1386     r->rows = r->c + 1;
1387     r->c = 0;
1388 }
1389
1390 static RRDR *rrdr_create(RRDSET *st, long n)
1391 {
1392     if(unlikely(!st)) {
1393         error("NULL value given!");
1394         return NULL;
1395     }
1396
1397     RRDR *r = callocz(1, sizeof(RRDR));
1398     r->st = st;
1399
1400     rrdr_lock_rrdset(r);
1401
1402     RRDDIM *rd;
1403     for(rd = st->dimensions ; rd ; rd = rd->next) r->d++;
1404
1405     r->n = n;
1406
1407     r->t = mallocz(n * sizeof(time_t));
1408     r->v = mallocz(n * r->d * sizeof(calculated_number));
1409     r->o = mallocz(n * r->d * sizeof(uint8_t));
1410     r->od = mallocz(r->d * sizeof(uint8_t));
1411
1412     // set the hidden flag on hidden dimensions
1413     int c;
1414     for(c = 0, rd = st->dimensions ; rd ; c++, rd = rd->next) {
1415         if(unlikely(rd->flags & RRDDIM_FLAG_HIDDEN)) r->od[c] = RRDR_HIDDEN;
1416         else r->od[c] = 0;
1417     }
1418
1419     r->c = -1;
1420     r->group = 1;
1421     r->update_every = 1;
1422
1423     return r;
1424 }
1425
1426 RRDR *rrd2rrdr(RRDSET *st, long points, long long after, long long before, int group_method, int aligned)
1427 {
1428     int debug = st->debug;
1429     int absolute_period_requested = -1;
1430
1431     time_t first_entry_t = rrdset_first_entry_t(st);
1432     time_t last_entry_t  = rrdset_last_entry_t(st);
1433
1434     if(before == 0 && after == 0) {
1435         // dump the all the data
1436         before = last_entry_t;
1437         after = first_entry_t;
1438         absolute_period_requested = 0;
1439     }
1440
1441     // allow relative for before (smaller than API_RELATIVE_TIME_MAX)
1442     if(((before < 0)?-before:before) <= API_RELATIVE_TIME_MAX) {
1443         if(abs(before) % st->update_every) {
1444             // make sure it is multiple of st->update_every
1445             if(before < 0) before = before - st->update_every - before % st->update_every;
1446             else           before = before + st->update_every - before % st->update_every;
1447         }
1448         if(before > 0) before = first_entry_t + before;
1449         else           before = last_entry_t  + before;
1450         absolute_period_requested = 0;
1451     }
1452
1453     // allow relative for after (smaller than API_RELATIVE_TIME_MAX)
1454     if(((after < 0)?-after:after) <= API_RELATIVE_TIME_MAX) {
1455         if(after == 0) after = -st->update_every;
1456         if(abs(after) % st->update_every) {
1457             // make sure it is multiple of st->update_every
1458             if(after < 0) after = after - st->update_every - after % st->update_every;
1459             else          after = after + st->update_every - after % st->update_every;
1460         }
1461         after = before + after;
1462         absolute_period_requested = 0;
1463     }
1464
1465     if(absolute_period_requested == -1)
1466         absolute_period_requested = 1;
1467
1468     // make sure they are within our timeframe
1469     if(before > last_entry_t)  before = last_entry_t;
1470     if(before < first_entry_t) before = first_entry_t;
1471
1472     if(after > last_entry_t)  after = last_entry_t;
1473     if(after < first_entry_t) after = first_entry_t;
1474
1475     // check if they are upside down
1476     if(after > before) {
1477         time_t tmp = before;
1478         before = after;
1479         after = tmp;
1480     }
1481
1482     // the duration of the chart
1483     time_t duration = before - after;
1484     long available_points = duration / st->update_every;
1485
1486     if(duration <= 0 || available_points <= 0)
1487         return rrdr_create(st, 1);
1488
1489     // check the wanted points
1490     if(points < 0) points = -points;
1491     if(points > available_points) points = available_points;
1492     if(points == 0) points = available_points;
1493
1494     // calculate proper grouping of source data
1495     long group = available_points / points;
1496     if(group <= 0) group = 1;
1497
1498     // round group to the closest integer
1499     if(available_points % points > points / 2) group++;
1500
1501     time_t after_new  = (aligned) ? (after  - (after  % (group * st->update_every))) : after;
1502     time_t before_new = (aligned) ? (before - (before % (group * st->update_every))) : before;
1503     long points_new   = (before_new - after_new) / st->update_every / group;
1504
1505     // find the starting and ending slots in our round robin db
1506     long    start_at_slot = rrdset_time2slot(st, before_new),
1507             stop_at_slot  = rrdset_time2slot(st, after_new);
1508
1509 #ifdef NETDATA_INTERNAL_CHECKS
1510     if(after_new < first_entry_t) {
1511         error("after_new %u is too small, minimum %u", (uint32_t)after_new, (uint32_t)first_entry_t);
1512     }
1513     if(after_new > last_entry_t) {
1514         error("after_new %u is too big, maximum %u", (uint32_t)after_new, (uint32_t)last_entry_t);
1515     }
1516     if(before_new < first_entry_t) {
1517         error("before_new %u is too small, minimum %u", (uint32_t)before_new, (uint32_t)first_entry_t);
1518     }
1519     if(before_new > last_entry_t) {
1520         error("before_new %u is too big, maximum %u", (uint32_t)before_new, (uint32_t)last_entry_t);
1521     }
1522     if(start_at_slot < 0 || start_at_slot >= st->entries) {
1523         error("start_at_slot is invalid %ld, expected 0 to %ld", start_at_slot, st->entries - 1);
1524     }
1525     if(stop_at_slot < 0 || stop_at_slot >= st->entries) {
1526         error("stop_at_slot is invalid %ld, expected 0 to %ld", stop_at_slot, st->entries - 1);
1527     }
1528     if(points_new > (before_new - after_new) / group / st->update_every + 1) {
1529         error("points_new %ld is more than points %ld", points_new, (before_new - after_new) / group / st->update_every + 1);
1530     }
1531 #endif
1532
1533     //info("RRD2RRDR(): %s: wanted %ld points, got %ld - group=%ld, wanted duration=%u, got %u - wanted %ld - %ld, got %ld - %ld", st->id, points, points_new, group, before - after, before_new - after_new, after, before, after_new, before_new);
1534
1535     after = after_new;
1536     before = before_new;
1537     duration = before - after;
1538     points = points_new;
1539
1540     // Now we have:
1541     // before = the end time of the calculation
1542     // after = the start time of the calculation
1543     // duration = the duration of the calculation
1544     // group = the number of source points to aggregate / group together
1545     // method = the method of grouping source points
1546     // points = the number of points to generate
1547
1548
1549     // -------------------------------------------------------------------------
1550     // initialize our result set
1551
1552     RRDR *r = rrdr_create(st, points);
1553     if(!r) {
1554 #ifdef NETDATA_INTERNAL_CHECKS
1555         error("Cannot create RRDR for %s, after=%u, before=%u, duration=%u, points=%ld", st->id, (uint32_t)after, (uint32_t)before, (uint32_t)duration, points);
1556 #endif
1557         return NULL;
1558     }
1559     if(!r->d) {
1560 #ifdef NETDATA_INTERNAL_CHECKS
1561         error("Returning empty RRDR (no dimensions in RRDSET) for %s, after=%u, before=%u, duration=%u, points=%ld", st->id, (uint32_t)after, (uint32_t)before, (uint32_t)duration, points);
1562 #endif
1563         return r;
1564     }
1565
1566     if(absolute_period_requested == 1)
1567         r->result_options |= RRDR_RESULT_OPTION_ABSOLUTE;
1568     else
1569         r->result_options |= RRDR_RESULT_OPTION_RELATIVE;
1570
1571     // find how many dimensions we have
1572     long dimensions = r->d;
1573
1574
1575     // -------------------------------------------------------------------------
1576     // checks for debugging
1577
1578     if(debug) debug(D_RRD_STATS, "INFO %s first_t: %u, last_t: %u, all_duration: %u, after: %u, before: %u, duration: %u, points: %ld, group: %ld"
1579             , st->id
1580             , (uint32_t)first_entry_t
1581             , (uint32_t)last_entry_t
1582             , (uint32_t)(last_entry_t - first_entry_t)
1583             , (uint32_t)after
1584             , (uint32_t)before
1585             , (uint32_t)duration
1586             , points
1587             , group
1588             );
1589
1590
1591     // -------------------------------------------------------------------------
1592     // temp arrays for keeping values per dimension
1593
1594     calculated_number   last_values[dimensions]; // keep the last value of each dimension
1595     calculated_number   group_values[dimensions]; // keep sums when grouping
1596     long                group_counts[dimensions]; // keep the number of values added to group_values
1597     uint8_t             group_options[dimensions];
1598     uint8_t             found_non_zero[dimensions];
1599
1600
1601     // initialize them
1602     RRDDIM *rd;
1603     long c;
1604     for( rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1605         last_values[c] = 0;
1606         group_values[c] = (group_method == GROUP_MAX || group_method == GROUP_MIN)?NAN:0;
1607         group_counts[c] = 0;
1608         group_options[c] = 0;
1609         found_non_zero[c] = 0;
1610     }
1611
1612
1613     // -------------------------------------------------------------------------
1614     // the main loop
1615
1616     time_t  now = rrdset_slot2time(st, start_at_slot),
1617             dt = st->update_every,
1618             group_start_t = 0;
1619
1620     if(unlikely(debug)) debug(D_RRD_STATS, "BEGIN %s after_t: %u (stop_at_t: %ld), before_t: %u (start_at_t: %ld), start_t(now): %u, current_entry: %ld, entries: %ld"
1621             , st->id
1622             , (uint32_t)after
1623             , stop_at_slot
1624             , (uint32_t)before
1625             , start_at_slot
1626             , (uint32_t)now
1627             , st->current_entry
1628             , st->entries
1629             );
1630
1631     r->group = group;
1632     r->update_every = group * st->update_every;
1633     r->before = now;
1634     r->after = now;
1635
1636     //info("RRD2RRDR(): %s: STARTING", st->id);
1637
1638     long slot = start_at_slot, counter = 0, stop_now = 0, added = 0, group_count = 0, add_this = 0;
1639     for(; !stop_now ; now -= dt, slot--, counter++) {
1640         if(unlikely(slot < 0)) slot = st->entries - 1;
1641         if(unlikely(slot == stop_at_slot)) stop_now = counter;
1642
1643         if(unlikely(debug)) debug(D_RRD_STATS, "ROW %s slot: %ld, entries_counter: %ld, group_count: %ld, added: %ld, now: %ld, %s %s"
1644                 , st->id
1645                 , slot
1646                 , counter
1647                 , group_count + 1
1648                 , added
1649                 , now
1650                 , (group_count + 1 == group)?"PRINT":"  -  "
1651                 , (now >= after && now <= before)?"RANGE":"  -  "
1652                 );
1653
1654         // make sure we return data in the proper time range
1655         if(unlikely(now > before)) continue;
1656         if(unlikely(now < after)) break;
1657
1658         if(unlikely(group_count == 0)) {
1659             group_start_t = now;
1660         }
1661         group_count++;
1662
1663         if(unlikely(group_count == group)) {
1664             if(unlikely(added >= points)) break;
1665             add_this = 1;
1666         }
1667
1668         // do the calculations
1669         for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1670             storage_number n = rd->values[slot];
1671             if(unlikely(!does_storage_number_exist(n))) continue;
1672
1673             group_counts[c]++;
1674
1675             calculated_number value = unpack_storage_number(n);
1676             if(likely(value != 0.0)) {
1677                 group_options[c] |= RRDR_NONZERO;
1678                 found_non_zero[c] = 1;
1679             }
1680
1681             if(unlikely(did_storage_number_reset(n)))
1682                 group_options[c] |= RRDR_RESET;
1683
1684             switch(group_method) {
1685                 case GROUP_MIN:
1686                     if(unlikely(isnan(group_values[c])) ||
1687                             fabsl(value) < fabsl(group_values[c]))
1688                         group_values[c] = value;
1689                     break;
1690
1691                 case GROUP_MAX:
1692                     if(unlikely(isnan(group_values[c])) ||
1693                             fabsl(value) > fabsl(group_values[c]))
1694                         group_values[c] = value;
1695                     break;
1696
1697                 default:
1698                 case GROUP_SUM:
1699                 case GROUP_AVERAGE:
1700                 case GROUP_UNDEFINED:
1701                     group_values[c] += value;
1702                     break;
1703
1704                 case GROUP_INCREMENTAL_SUM:
1705                     if(unlikely(slot == start_at_slot))
1706                         last_values[c] = value;
1707
1708                     group_values[c] += last_values[c] - value;
1709                     last_values[c] = value;
1710                     break;
1711             }
1712         }
1713
1714         // added it
1715         if(unlikely(add_this)) {
1716             if(unlikely(!rrdr_line_init(r, group_start_t))) break;
1717
1718             r->after = now;
1719
1720             calculated_number *cn = rrdr_line_values(r);
1721             uint8_t *co = rrdr_line_options(r);
1722
1723             for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
1724
1725                 // update the dimension options
1726                 if(likely(found_non_zero[c])) r->od[c] |= RRDR_NONZERO;
1727
1728                 // store the specific point options
1729                 co[c] = group_options[c];
1730
1731                 // store the value
1732                 if(unlikely(group_counts[c] == 0)) {
1733                     cn[c] = 0.0;
1734                     co[c] |= RRDR_EMPTY;
1735                     group_values[c] = (group_method == GROUP_MAX || group_method == GROUP_MIN)?NAN:0;
1736                 }
1737                 else {
1738                     switch(group_method) {
1739                         case GROUP_MIN:
1740                         case GROUP_MAX:
1741                             if(unlikely(isnan(group_values[c])))
1742                                 cn[c] = 0;
1743                             else {
1744                                 cn[c] = group_values[c];
1745                                 group_values[c] = NAN;
1746                             }
1747                             break;
1748
1749                         case GROUP_SUM:
1750                         case GROUP_INCREMENTAL_SUM:
1751                             cn[c] = group_values[c];
1752                             group_values[c] = 0;
1753                             break;
1754
1755                         default:
1756                         case GROUP_AVERAGE:
1757                         case GROUP_UNDEFINED:
1758                             cn[c] = group_values[c] / group_counts[c];
1759                             group_values[c] = 0;
1760                             break;
1761                     }
1762
1763                     if(cn[c] < r->min) r->min = cn[c];
1764                     if(cn[c] > r->max) r->max = cn[c];
1765                 }
1766
1767                 // reset for the next loop
1768                 group_counts[c] = 0;
1769                 group_options[c] = 0;
1770             }
1771
1772             added++;
1773             group_count = 0;
1774             add_this = 0;
1775         }
1776     }
1777
1778     rrdr_done(r);
1779     //info("RRD2RRDR(): %s: END %ld loops made, %ld points generated", st->id, counter, rrdr_rows(r));
1780     //error("SHIFT: %s: wanted %ld points, got %ld", st->id, points, rrdr_rows(r));
1781     return r;
1782 }
1783
1784 int rrd2value(RRDSET *st, BUFFER *wb, calculated_number *n, const char *dimensions, long points, long long after, long long before, int group_method, uint32_t options, time_t *db_after, time_t *db_before, int *value_is_null)
1785 {
1786     RRDR *r = rrd2rrdr(st, points, after, before, group_method, !(options & RRDR_OPTION_NOT_ALIGNED));
1787     if(!r) {
1788         if(value_is_null) *value_is_null = 1;
1789         return 500;
1790     }
1791
1792     if(rrdr_rows(r) == 0) {
1793         rrdr_free(r);
1794
1795         if(db_after)  *db_after  = 0;
1796         if(db_before) *db_before = 0;
1797         if(value_is_null) *value_is_null = 1;
1798
1799         return 400;
1800     }
1801
1802     if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
1803         buffer_no_cacheable(wb);
1804     else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
1805         buffer_cacheable(wb);
1806
1807     options = rrdr_check_options(r, options, dimensions);
1808
1809     if(dimensions)
1810         rrdr_disable_not_selected_dimensions(r, options, dimensions);
1811
1812     if(db_after)  *db_after  = r->after;
1813     if(db_before) *db_before = r->before;
1814
1815     long i = (options & RRDR_OPTION_REVERSED)?rrdr_rows(r) - 1:0;
1816     *n = rrdr2value(r, i, options, value_is_null);
1817
1818     rrdr_free(r);
1819     return 200;
1820 }
1821
1822 int rrd2format(RRDSET *st, BUFFER *wb, BUFFER *dimensions, uint32_t format, long points, long long after, long long before, int group_method, uint32_t options, time_t *latest_timestamp)
1823 {
1824     RRDR *r = rrd2rrdr(st, points, after, before, group_method, !(options & RRDR_OPTION_NOT_ALIGNED));
1825     if(!r) {
1826         buffer_strcat(wb, "Cannot generate output with these parameters on this chart.");
1827         return 500;
1828     }
1829
1830     if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
1831         buffer_no_cacheable(wb);
1832     else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
1833         buffer_cacheable(wb);
1834
1835     options = rrdr_check_options(r, options, (dimensions)?buffer_tostring(dimensions):NULL);
1836
1837     if(dimensions)
1838         rrdr_disable_not_selected_dimensions(r, options, buffer_tostring(dimensions));
1839
1840     if(latest_timestamp && rrdr_rows(r) > 0)
1841         *latest_timestamp = r->before;
1842
1843     switch(format) {
1844     case DATASOURCE_SSV:
1845         if(options & RRDR_OPTION_JSON_WRAP) {
1846             wb->contenttype = CT_APPLICATION_JSON;
1847             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1848             rrdr2ssv(r, wb, options, "", " ", "");
1849             rrdr_json_wrapper_end(r, wb, format, options, 1);
1850         }
1851         else {
1852             wb->contenttype = CT_TEXT_PLAIN;
1853             rrdr2ssv(r, wb, options, "", " ", "");
1854         }
1855         break;
1856
1857     case DATASOURCE_SSV_COMMA:
1858         if(options & RRDR_OPTION_JSON_WRAP) {
1859             wb->contenttype = CT_APPLICATION_JSON;
1860             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1861             rrdr2ssv(r, wb, options, "", ",", "");
1862             rrdr_json_wrapper_end(r, wb, format, options, 1);
1863         }
1864         else {
1865             wb->contenttype = CT_TEXT_PLAIN;
1866             rrdr2ssv(r, wb, options, "", ",", "");
1867         }
1868         break;
1869
1870     case DATASOURCE_JS_ARRAY:
1871         if(options & RRDR_OPTION_JSON_WRAP) {
1872             wb->contenttype = CT_APPLICATION_JSON;
1873             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1874             rrdr2ssv(r, wb, options, "[", ",", "]");
1875             rrdr_json_wrapper_end(r, wb, format, options, 0);
1876         }
1877         else {
1878             wb->contenttype = CT_APPLICATION_JSON;
1879             rrdr2ssv(r, wb, options, "[", ",", "]");
1880         }
1881         break;
1882
1883     case DATASOURCE_CSV:
1884         if(options & RRDR_OPTION_JSON_WRAP) {
1885             wb->contenttype = CT_APPLICATION_JSON;
1886             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1887             rrdr2csv(r, wb, options, "", ",", "\\n", "");
1888             rrdr_json_wrapper_end(r, wb, format, options, 1);
1889         }
1890         else {
1891             wb->contenttype = CT_TEXT_PLAIN;
1892             rrdr2csv(r, wb, options, "", ",", "\r\n", "");
1893         }
1894         break;
1895
1896     case DATASOURCE_CSV_JSON_ARRAY:
1897         wb->contenttype = CT_APPLICATION_JSON;
1898         if(options & RRDR_OPTION_JSON_WRAP) {
1899             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1900             buffer_strcat(wb, "[\n");
1901             rrdr2csv(r, wb, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
1902             buffer_strcat(wb, "\n]");
1903             rrdr_json_wrapper_end(r, wb, format, options, 0);
1904         }
1905         else {
1906             wb->contenttype = CT_TEXT_PLAIN;
1907             buffer_strcat(wb, "[\n");
1908             rrdr2csv(r, wb, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
1909             buffer_strcat(wb, "\n]");
1910         }
1911         break;
1912
1913     case DATASOURCE_TSV:
1914         if(options & RRDR_OPTION_JSON_WRAP) {
1915             wb->contenttype = CT_APPLICATION_JSON;
1916             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1917             rrdr2csv(r, wb, options, "", "\t", "\\n", "");
1918             rrdr_json_wrapper_end(r, wb, format, options, 1);
1919         }
1920         else {
1921             wb->contenttype = CT_TEXT_PLAIN;
1922             rrdr2csv(r, wb, options, "", "\t", "\r\n", "");
1923         }
1924         break;
1925
1926     case DATASOURCE_HTML:
1927         if(options & RRDR_OPTION_JSON_WRAP) {
1928             wb->contenttype = CT_APPLICATION_JSON;
1929             rrdr_json_wrapper_begin(r, wb, format, options, 1);
1930             buffer_strcat(wb, "<html>\\n<center>\\n<table border=\\\"0\\\" cellpadding=\\\"5\\\" cellspacing=\\\"5\\\">\\n");
1931             rrdr2csv(r, wb, options, "<tr><td>", "</td><td>", "</td></tr>\\n", "");
1932             buffer_strcat(wb, "</table>\\n</center>\\n</html>\\n");
1933             rrdr_json_wrapper_end(r, wb, format, options, 1);
1934         }
1935         else {
1936             wb->contenttype = CT_TEXT_HTML;
1937             buffer_strcat(wb, "<html>\n<center>\n<table border=\"0\" cellpadding=\"5\" cellspacing=\"5\">\n");
1938             rrdr2csv(r, wb, options, "<tr><td>", "</td><td>", "</td></tr>\n", "");
1939             buffer_strcat(wb, "</table>\n</center>\n</html>\n");
1940         }
1941         break;
1942
1943     case DATASOURCE_DATATABLE_JSONP:
1944         wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
1945
1946         if(options & RRDR_OPTION_JSON_WRAP)
1947             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1948
1949         rrdr2json(r, wb, options, 1);
1950
1951         if(options & RRDR_OPTION_JSON_WRAP)
1952             rrdr_json_wrapper_end(r, wb, format, options, 0);
1953         break;
1954
1955     case DATASOURCE_DATATABLE_JSON:
1956         wb->contenttype = CT_APPLICATION_JSON;
1957
1958         if(options & RRDR_OPTION_JSON_WRAP)
1959             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1960
1961         rrdr2json(r, wb, options, 1);
1962
1963         if(options & RRDR_OPTION_JSON_WRAP)
1964             rrdr_json_wrapper_end(r, wb, format, options, 0);
1965         break;
1966
1967     case DATASOURCE_JSONP:
1968         wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
1969         if(options & RRDR_OPTION_JSON_WRAP)
1970             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1971
1972         rrdr2json(r, wb, options, 0);
1973
1974         if(options & RRDR_OPTION_JSON_WRAP)
1975             rrdr_json_wrapper_end(r, wb, format, options, 0);
1976         break;
1977
1978     case DATASOURCE_JSON:
1979     default:
1980         wb->contenttype = CT_APPLICATION_JSON;
1981
1982         if(options & RRDR_OPTION_JSON_WRAP)
1983             rrdr_json_wrapper_begin(r, wb, format, options, 0);
1984
1985         rrdr2json(r, wb, options, 0);
1986
1987         if(options & RRDR_OPTION_JSON_WRAP)
1988             rrdr_json_wrapper_end(r, wb, format, options, 0);
1989         break;
1990     }
1991
1992     rrdr_free(r);
1993     return 200;
1994 }
1995
1996 time_t rrd_stats_json(int type, RRDSET *st, BUFFER *wb, long points, long group, int group_method, time_t after, time_t before, int only_non_zero)
1997 {
1998     int c;
1999     pthread_rwlock_rdlock(&st->rwlock);
2000
2001
2002     // -------------------------------------------------------------------------
2003     // switch from JSON to google JSON
2004
2005     char kq[2] = "\"";
2006     char sq[2] = "\"";
2007     switch(type) {
2008         case DATASOURCE_DATATABLE_JSON:
2009         case DATASOURCE_DATATABLE_JSONP:
2010             kq[0] = '\0';
2011             sq[0] = '\'';
2012             break;
2013
2014         case DATASOURCE_JSON:
2015         default:
2016             break;
2017     }
2018
2019
2020     // -------------------------------------------------------------------------
2021     // validate the parameters
2022
2023     if(points < 1) points = 1;
2024     if(group < 1) group = 1;
2025
2026     if(before == 0 || before > rrdset_last_entry_t(st)) before = rrdset_last_entry_t(st);
2027     if(after  == 0 || after < rrdset_first_entry_t(st)) after = rrdset_first_entry_t(st);
2028
2029     // ---
2030
2031     // our return value (the last timestamp printed)
2032     // this is required to detect re-transmit in google JSONP
2033     time_t last_timestamp = 0;
2034
2035
2036     // -------------------------------------------------------------------------
2037     // find how many dimensions we have
2038
2039     int dimensions = 0;
2040     RRDDIM *rd;
2041     for( rd = st->dimensions ; rd ; rd = rd->next) dimensions++;
2042     if(!dimensions) {
2043         pthread_rwlock_unlock(&st->rwlock);
2044         buffer_strcat(wb, "No dimensions yet.");
2045         return 0;
2046     }
2047
2048
2049     // -------------------------------------------------------------------------
2050     // prepare various strings, to speed up the loop
2051
2052     char overflow_annotation[201]; snprintfz(overflow_annotation, 200, ",{%sv%s:%sRESET OR OVERFLOW%s},{%sv%s:%sThe counters have been wrapped.%s}", kq, kq, sq, sq, kq, kq, sq, sq);
2053     char normal_annotation[201];   snprintfz(normal_annotation,   200, ",{%sv%s:null},{%sv%s:null}", kq, kq, kq, kq);
2054     char pre_date[51];             snprintfz(pre_date,             50, "        {%sc%s:[{%sv%s:%s", kq, kq, kq, kq, sq);
2055     char post_date[21];            snprintfz(post_date,            20, "%s}", sq);
2056     char pre_value[21];            snprintfz(pre_value,            20, ",{%sv%s:", kq, kq);
2057     char post_value[21];           strcpy(post_value,                  "}");
2058
2059
2060     // -------------------------------------------------------------------------
2061     // checks for debugging
2062
2063     if(st->debug) {
2064         debug(D_RRD_STATS, "%s first_entry_t = %ld, last_entry_t = %ld, duration = %ld, after = %ld, before = %ld, duration = %ld, entries_to_show = %ld, group = %ld"
2065             , st->id
2066             , rrdset_first_entry_t(st)
2067             , rrdset_last_entry_t(st)
2068             , rrdset_last_entry_t(st) - rrdset_first_entry_t(st)
2069             , after
2070             , before
2071             , before - after
2072             , points
2073             , group
2074             );
2075
2076         if(before < after)
2077             debug(D_RRD_STATS, "WARNING: %s The newest value in the database (%ld) is earlier than the oldest (%ld)", st->name, before, after);
2078
2079         if((before - after) > st->entries * st->update_every)
2080             debug(D_RRD_STATS, "WARNING: %s The time difference between the oldest and the newest entries (%ld) is higher than the capacity of the database (%ld)", st->name, before - after, st->entries * st->update_every);
2081     }
2082
2083
2084     // -------------------------------------------------------------------------
2085     // temp arrays for keeping values per dimension
2086
2087     calculated_number group_values[dimensions]; // keep sums when grouping
2088     int               print_hidden[dimensions]; // keep hidden flags
2089     int               found_non_zero[dimensions];
2090     int               found_non_existing[dimensions];
2091
2092     // initialize them
2093     for( rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
2094         group_values[c] = 0;
2095         print_hidden[c] = (rd->flags & RRDDIM_FLAG_HIDDEN)?1:0;
2096         found_non_zero[c] = 0;
2097         found_non_existing[c] = 0;
2098     }
2099
2100
2101     // error("OLD: points=%d after=%d before=%d group=%d, duration=%d", entries_to_show, before - (st->update_every * group * entries_to_show), before, group, before - after + 1);
2102     // rrd2array(st, entries_to_show, before - (st->update_every * group * entries_to_show), before, group_method, only_non_zero);
2103     // rrd2rrdr(st, entries_to_show, before - (st->update_every * group * entries_to_show), before, group_method);
2104
2105     // -------------------------------------------------------------------------
2106     // remove dimensions that contain only zeros
2107
2108     int max_loop = 1;
2109     if(only_non_zero) max_loop = 2;
2110
2111     for(; max_loop ; max_loop--) {
2112
2113         // -------------------------------------------------------------------------
2114         // print the JSON header
2115
2116         buffer_sprintf(wb, "{\n %scols%s:\n [\n", kq, kq);
2117         buffer_sprintf(wb, "        {%sid%s:%s%s,%slabel%s:%stime%s,%spattern%s:%s%s,%stype%s:%sdatetime%s},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq);
2118         buffer_sprintf(wb, "        {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotation%s}},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
2119         buffer_sprintf(wb, "        {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotationText%s}}", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
2120
2121         // print the header for each dimension
2122         // and update the print_hidden array for the dimensions that should be hidden
2123         int pc = 0;
2124         for( rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
2125             if(!print_hidden[c]) {
2126                 pc++;
2127                 buffer_sprintf(wb, ",\n     {%sid%s:%s%s,%slabel%s:%s%s%s,%spattern%s:%s%s,%stype%s:%snumber%s}", kq, kq, sq, sq, kq, kq, sq, rd->name, sq, kq, kq, sq, sq, kq, kq, sq, sq);
2128             }
2129         }
2130         if(!pc) {
2131             buffer_sprintf(wb, ",\n     {%sid%s:%s%s,%slabel%s:%s%s%s,%spattern%s:%s%s,%stype%s:%snumber%s}", kq, kq, sq, sq, kq, kq, sq, "no data", sq, kq, kq, sq, sq, kq, kq, sq, sq);
2132         }
2133
2134         // print the begin of row data
2135         buffer_sprintf(wb, "\n  ],\n    %srows%s:\n [\n", kq, kq);
2136
2137
2138         // -------------------------------------------------------------------------
2139         // the main loop
2140
2141         int annotate_reset = 0;
2142         int annotation_count = 0;
2143
2144         long    t = rrdset_time2slot(st, before),
2145                 stop_at_t = rrdset_time2slot(st, after),
2146                 stop_now = 0;
2147
2148         t -= t % group;
2149
2150         time_t  now = rrdset_slot2time(st, t),
2151                 dt = st->update_every;
2152
2153         long count = 0, printed = 0, group_count = 0;
2154         last_timestamp = 0;
2155
2156         if(st->debug) debug(D_RRD_STATS, "%s: REQUEST after:%u before:%u, points:%ld, group:%ld, CHART cur:%ld first: %u last:%u, CALC start_t:%ld, stop_t:%ld"
2157                     , st->id
2158                     , (uint32_t)after
2159                     , (uint32_t)before
2160                     , points
2161                     , group
2162                     , st->current_entry
2163                     , (uint32_t)rrdset_first_entry_t(st)
2164                     , (uint32_t)rrdset_last_entry_t(st)
2165                     , t
2166                     , stop_at_t
2167                     );
2168
2169         long counter = 0;
2170         for(; !stop_now ; now -= dt, t--, counter++) {
2171             if(t < 0) t = st->entries - 1;
2172             if(t == stop_at_t) stop_now = counter;
2173
2174             int print_this = 0;
2175
2176             if(st->debug) debug(D_RRD_STATS, "%s t = %ld, count = %ld, group_count = %ld, printed = %ld, now = %ld, %s %s"
2177                     , st->id
2178                     , t
2179                     , count + 1
2180                     , group_count + 1
2181                     , printed
2182                     , now
2183                     , (group_count + 1 == group)?"PRINT":"  -  "
2184                     , (now >= after && now <= before)?"RANGE":"  -  "
2185                     );
2186
2187
2188             // make sure we return data in the proper time range
2189             if(now > before) continue;
2190             if(now < after) break;
2191
2192             //if(rrdset_slot2time(st, t) != now)
2193             //  error("%s: slot=%ld, now=%ld, slot2time=%ld, diff=%ld, last_entry_t=%ld, rrdset_last_slot=%ld", st->id, t, now, rrdset_slot2time(st,t), now - rrdset_slot2time(st,t), rrdset_last_entry_t(st), rrdset_last_slot(st));
2194
2195             count++;
2196             group_count++;
2197
2198             // check if we have to print this now
2199             if(group_count == group) {
2200                 if(printed >= points) {
2201                     // debug(D_RRD_STATS, "Already printed all rows. Stopping.");
2202                     break;
2203                 }
2204
2205                 // generate the local date time
2206                 struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
2207                 if(!tm) { error("localtime() failed."); continue; }
2208                 if(now > last_timestamp) last_timestamp = now;
2209
2210                 if(printed) buffer_strcat(wb, "]},\n");
2211                 buffer_strcat(wb, pre_date);
2212                 buffer_jsdate(wb, tm->tm_year + 1900, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
2213                 buffer_strcat(wb, post_date);
2214
2215                 print_this = 1;
2216             }
2217
2218             // do the calculations
2219             for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
2220                 storage_number n = rd->values[t];
2221                 calculated_number value = unpack_storage_number(n);
2222
2223                 if(!does_storage_number_exist(n)) {
2224                     value = 0.0;
2225                     found_non_existing[c]++;
2226                 }
2227                 if(did_storage_number_reset(n)) annotate_reset = 1;
2228
2229                 switch(group_method) {
2230                     case GROUP_MAX:
2231                         if(abs(value) > abs(group_values[c])) group_values[c] = value;
2232                         break;
2233
2234                     case GROUP_SUM:
2235                         group_values[c] += value;
2236                         break;
2237
2238                     default:
2239                     case GROUP_AVERAGE:
2240                         group_values[c] += value;
2241                         if(print_this) group_values[c] /= ( group_count - found_non_existing[c] );
2242                         break;
2243                 }
2244             }
2245
2246             if(print_this) {
2247                 if(annotate_reset) {
2248                     annotation_count++;
2249                     buffer_strcat(wb, overflow_annotation);
2250                     annotate_reset = 0;
2251                 }
2252                 else
2253                     buffer_strcat(wb, normal_annotation);
2254
2255                 pc = 0;
2256                 for(c = 0 ; c < dimensions ; c++) {
2257                     if(found_non_existing[c] == group_count) {
2258                         // all entries are non-existing
2259                         pc++;
2260                         buffer_strcat(wb, pre_value);
2261                         buffer_strcat(wb, "null");
2262                         buffer_strcat(wb, post_value);
2263                     }
2264                     else if(!print_hidden[c]) {
2265                         pc++;
2266                         buffer_strcat(wb, pre_value);
2267                         buffer_rrd_value(wb, group_values[c]);
2268                         buffer_strcat(wb, post_value);
2269
2270                         if(group_values[c]) found_non_zero[c]++;
2271                     }
2272
2273                     // reset them for the next loop
2274                     group_values[c] = 0;
2275                     found_non_existing[c] = 0;
2276                 }
2277
2278                 // if all dimensions are hidden, print a null
2279                 if(!pc) {
2280                     buffer_strcat(wb, pre_value);
2281                     buffer_strcat(wb, "null");
2282                     buffer_strcat(wb, post_value);
2283                 }
2284
2285                 printed++;
2286                 group_count = 0;
2287             }
2288         }
2289
2290         if(printed) buffer_strcat(wb, "]}");
2291         buffer_strcat(wb, "\n   ]\n}\n");
2292
2293         if(only_non_zero && max_loop > 1) {
2294             int changed = 0;
2295             for(rd = st->dimensions, c = 0 ; rd && c < dimensions ; rd = rd->next, c++) {
2296                 group_values[c] = 0;
2297                 found_non_existing[c] = 0;
2298
2299                 if(!print_hidden[c] && !found_non_zero[c]) {
2300                     changed = 1;
2301                     print_hidden[c] = 1;
2302                 }
2303             }
2304
2305             if(changed) buffer_flush(wb);
2306             else break;
2307         }
2308         else break;
2309
2310     } // max_loop
2311
2312     debug(D_RRD_STATS, "RRD_STATS_JSON: %s total %zu bytes", st->name, wb->len);
2313
2314     pthread_rwlock_unlock(&st->rwlock);
2315     return last_timestamp;
2316 }