diff options
Diffstat (limited to 'web/api/formatters/json/json.c')
| -rw-r--r-- | web/api/formatters/json/json.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/web/api/formatters/json/json.c b/web/api/formatters/json/json.c new file mode 100644 index 0000000..66b3b9c --- /dev/null +++ b/web/api/formatters/json/json.c @@ -0,0 +1,246 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "json.h" + +#define JSON_DATES_JS 1 +#define JSON_DATES_TIMESTAMP 2 + +void rrdr2json(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, int datatable) { + rrdset_check_rdlock(r->st); + + //info("RRD2JSON(): %s: BEGIN", r->st->id); + int row_annotations = 0, dates, dates_with_new = 0; + char kq[2] = "", // key quote + sq[2] = "", // string quote + pre_label[101] = "", // before each label + post_label[101] = "", // after each label + pre_date[101] = "", // the beginning of line, to the date + post_date[101] = "", // closing the date + pre_value[101] = "", // before each value + post_value[101] = "", // after each value + post_line[101] = "", // at the end of each row + normal_annotation[201] = "", // default row annotation + overflow_annotation[201] = "", // overflow row annotation + data_begin[101] = "", // between labels and values + finish[101] = ""; // at the end of everything + + if(datatable) { + dates = JSON_DATES_JS; + if( options & RRDR_OPTION_GOOGLE_JSON ) { + kq[0] = '\0'; + sq[0] = '\''; + } + else { + kq[0] = '"'; + sq[0] = '"'; + } + row_annotations = 1; + snprintfz(pre_date, 100, " {%sc%s:[{%sv%s:%s", kq, kq, kq, kq, sq); + snprintfz(post_date, 100, "%s}", sq); + snprintfz(pre_label, 100, ",\n {%sid%s:%s%s,%slabel%s:%s", kq, kq, sq, sq, kq, kq, sq); + snprintfz(post_label, 100, "%s,%spattern%s:%s%s,%stype%s:%snumber%s}", sq, kq, kq, sq, sq, kq, kq, sq, sq); + snprintfz(pre_value, 100, ",{%sv%s:", kq, kq); + strcpy(post_value, "}"); + strcpy(post_line, "]}"); + snprintfz(data_begin, 100, "\n ],\n %srows%s:\n [\n", kq, kq); + strcpy(finish, "\n ]\n}"); + + 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); + snprintfz(normal_annotation, 200, ",{%sv%s:null},{%sv%s:null}", kq, kq, kq, kq); + + buffer_sprintf(wb, "{\n %scols%s:\n [\n", kq, kq); + 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); + 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); + 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); + + // remove the valueobjects flag + // google wants its own keys + if(options & RRDR_OPTION_OBJECTSROWS) + options &= ~RRDR_OPTION_OBJECTSROWS; + } + else { + kq[0] = '"'; + sq[0] = '"'; + if(options & RRDR_OPTION_GOOGLE_JSON) { + dates = JSON_DATES_JS; + dates_with_new = 1; + } + else { + dates = JSON_DATES_TIMESTAMP; + dates_with_new = 0; + } + if( options & RRDR_OPTION_OBJECTSROWS ) + strcpy(pre_date, " { "); + else + strcpy(pre_date, " [ "); + strcpy(pre_label, ", \""); + strcpy(post_label, "\""); + strcpy(pre_value, ", "); + if( options & RRDR_OPTION_OBJECTSROWS ) + strcpy(post_line, "}"); + else + strcpy(post_line, "]"); + snprintfz(data_begin, 100, "],\n %sdata%s:\n [\n", kq, kq); + strcpy(finish, "\n ]\n}"); + + buffer_sprintf(wb, "{\n %slabels%s: [", kq, kq); + buffer_sprintf(wb, "%stime%s", sq, sq); + } + + // ------------------------------------------------------------------------- + // print the JSON header + + long c, i; + RRDDIM *rd; + + // print the header lines + for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) { + if(unlikely(r->od[c] & RRDR_DIMENSION_HIDDEN)) continue; + if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_DIMENSION_NONZERO))) continue; + + buffer_strcat(wb, pre_label); + buffer_strcat(wb, rd->name); + buffer_strcat(wb, post_label); + i++; + } + if(!i) { + buffer_strcat(wb, pre_label); + buffer_strcat(wb, "no data"); + buffer_strcat(wb, post_label); + } + + // print the begin of row data + buffer_strcat(wb, data_begin); + + // if all dimensions are hidden, print a null + if(!i) { + buffer_strcat(wb, finish); + return; + } + + long start = 0, end = rrdr_rows(r), step = 1; + if(!(options & RRDR_OPTION_REVERSED)) { + start = rrdr_rows(r) - 1; + end = -1; + step = -1; + } + + // for each line in the array + calculated_number total = 1; + for(i = start; i != end ;i += step) { + calculated_number *cn = &r->v[ i * r->d ]; + RRDR_VALUE_FLAGS *co = &r->o[ i * r->d ]; + + time_t now = r->t[i]; + + if(dates == JSON_DATES_JS) { + // generate the local date time + struct tm tmbuf, *tm = localtime_r(&now, &tmbuf); + if(!tm) { error("localtime_r() failed."); continue; } + + if(likely(i != start)) buffer_strcat(wb, ",\n"); + buffer_strcat(wb, pre_date); + + if( options & RRDR_OPTION_OBJECTSROWS ) + buffer_sprintf(wb, "%stime%s: ", kq, kq); + + if(dates_with_new) + buffer_strcat(wb, "new "); + + buffer_jsdate(wb, tm->tm_year + 1900, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); + + buffer_strcat(wb, post_date); + + if(row_annotations) { + // google supports one annotation per row + int annotation_found = 0; + for(c = 0, rd = r->st->dimensions; rd ;c++, rd = rd->next) { + if(unlikely(!(r->od[c] & RRDR_DIMENSION_SELECTED))) continue; + + if(co[c] & RRDR_VALUE_RESET) { + buffer_strcat(wb, overflow_annotation); + annotation_found = 1; + break; + } + } + if(!annotation_found) + buffer_strcat(wb, normal_annotation); + } + } + else { + // print the timestamp of the line + if(likely(i != start)) buffer_strcat(wb, ",\n"); + buffer_strcat(wb, pre_date); + + if( options & RRDR_OPTION_OBJECTSROWS ) + buffer_sprintf(wb, "%stime%s: ", kq, kq); + + buffer_rrd_value(wb, (calculated_number)r->t[i]); + // in ms + if(options & RRDR_OPTION_MILLISECONDS) buffer_strcat(wb, "000"); + + buffer_strcat(wb, post_date); + } + + int set_min_max = 0; + if(unlikely(options & RRDR_OPTION_PERCENTAGE)) { + total = 0; + for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) { + calculated_number n = cn[c]; + + if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0)) + n = -n; + + total += n; + } + // prevent a division by zero + if(total == 0) total = 1; + set_min_max = 1; + } + + // for each dimension + for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) { + if(unlikely(r->od[c] & RRDR_DIMENSION_HIDDEN)) continue; + if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_DIMENSION_NONZERO))) continue; + + calculated_number n = cn[c]; + + buffer_strcat(wb, pre_value); + + if( options & RRDR_OPTION_OBJECTSROWS ) + buffer_sprintf(wb, "%s%s%s: ", kq, rd->name, kq); + + if(co[c] & RRDR_VALUE_EMPTY) { + if(options & RRDR_OPTION_NULL2ZERO) + buffer_strcat(wb, "0"); + else + buffer_strcat(wb, "null"); + } + else { + if(unlikely((options & RRDR_OPTION_ABSOLUTE) && n < 0)) + n = -n; + + if(unlikely(options & RRDR_OPTION_PERCENTAGE)) { + n = n * 100 / total; + + if(unlikely(set_min_max)) { + r->min = r->max = n; + set_min_max = 0; + } + + if(n < r->min) r->min = n; + if(n > r->max) r->max = n; + } + + buffer_rrd_value(wb, n); + } + + buffer_strcat(wb, post_value); + } + + buffer_strcat(wb, post_line); + } + + buffer_strcat(wb, finish); + //info("RRD2JSON(): %s: END", r->st->id); +} |