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