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-rw-r--r--web/api/formatters/json/json.c246
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);
+}