New upstream version 1.11.0+dfsgupstream/1.11.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

31 files changed, 4388 insertions, 0 deletions

diff --git a/web/api/formatters/Makefile.am b/web/api/formatters/Makefile.am
new file mode 100644
index 000000000..324575906
--- /dev/null
+++ b/web/api/formatters/Makefile.am
@@ -0,0 +1,15 @@
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diff --git a/web/api/formatters/Makefile.in b/web/api/formatters/Makefile.in
new file mode 100644
index 000000000..a2ea0e53c
--- /dev/null
+++ b/web/api/formatters/Makefile.in
@@ -0,0 +1,651 @@
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+	    $(am__make_dryrun) \
+	      || test -d "$(distdir)/$$subdir" \
+	      || $(MKDIR_P) "$(distdir)/$$subdir" \
+	      || exit 1; \
+	    dir1=$$subdir; dir2="$(distdir)/$$subdir"; \
+	    $(am__relativize); \
+	    new_distdir=$$reldir; \
+	    dir1=$$subdir; dir2="$(top_distdir)"; \
+	    $(am__relativize); \
+	    new_top_distdir=$$reldir; \
+	    echo " (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) top_distdir="$$new_top_distdir" distdir="$$new_distdir" \\"; \
+	    echo "     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)"; \
+	    ($(am__cd) $$subdir && \
+	      $(MAKE) $(AM_MAKEFLAGS) \
+	        top_distdir="$$new_top_distdir" \
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+		am__remove_distdir=: \
+		am__skip_length_check=: \
+		am__skip_mode_fix=: \
+	        distdir) \
+	      || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-recursive
+all-am: Makefile $(DATA)
+installdirs: installdirs-recursive
+installdirs-am:
+install: install-recursive
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+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-recursive
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+clean: clean-recursive
+
+clean-am: clean-generic mostlyclean-am
+
+distclean: distclean-recursive
+	-rm -f Makefile
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+dvi: dvi-recursive
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+
+html: html-recursive
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+	distclean distclean-generic distclean-tags distdir dvi dvi-am \
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diff --git a/web/api/formatters/README.md b/web/api/formatters/README.md
new file mode 100644
index 000000000..ad0df2d46
--- /dev/null
+++ b/web/api/formatters/README.md
@@ -0,0 +1,72 @@
+# Query formatting
+
+API data queries need to be formatted before returned to the caller.
+Using API parameters, the caller may define the format he/she wishes to get back.
+
+The following formats are supported:
+
+format|module|content type|description
+:---:|:---:|:---:|:-----
+`array`|[ssv](ssv)|application/json|a JSON array
+`csv`|[csv](csv)|text/plain|a text table, comma separated, with a header line (dimension names) and `\r\n` at the end of the lines
+`csvjsonarray`|[csv](csv)|application/json|a JSON array, with each row as another array (the first row has the dimension names)
+`datasource`|[json](json)|application/json|a Google Visualization Provider `datasource` javascript callback
+`datatable`|[json](json)|application/json|a Google `datatable`
+`html`|[csv](csv)|text/html|an html table
+`json`|[json](json)|application/json|a JSON object
+`jsonp`|[json](json)|application/json|a JSONP javascript callback
+`markdown`|[csv](csv)|text/plain|a markdown table
+`ssv`|[ssv](ssv)|text/plain|a space separated list of values
+`ssvcomma`|[ssv](ssv)|text/plain|a comma separated list of values
+`tsv`|[csv](csv)|text/plain|a TAB delimited `csv` (MS Excel flavor)
+
+For examples of each format, check the relative module documentation.
+
+## Metadata with the `jsonwrap` option
+
+All data queries can be encapsulated to JSON object having metadata about the query and the results.
+
+This is done by adding the `options=jsonwrap` to the API URL (if there are other `options` append
+`,jsonwrap` to the existing ones).
+
+This is such an object:
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=system.cpu&after=-3600&points=6&group=average&format=csv&options=nonzero,jsonwrap'
+{
+   "api": 1,
+   "id": "system.cpu",
+   "name": "system.cpu",
+   "view_update_every": 600,
+   "update_every": 1,
+   "first_entry": 1540387074,
+   "last_entry": 1540647070,
+   "before": 1540647000,
+   "after": 1540644000,
+   "dimension_names": ["steal", "softirq", "user", "system", "iowait"],
+   "dimension_ids": ["steal", "softirq", "user", "system", "iowait"],
+   "latest_values": [0, 0.2493766, 1.745636, 0.4987531, 0],
+   "view_latest_values": [0.0158314, 0.0516506, 0.866549, 0.7196127, 0.0050002],
+   "dimensions": 5,
+   "points": 6,
+   "format": "csv",
+   "result": "time,steal,softirq,user,system,iowait\n2018-10-27 13:30:00,0.0158314,0.0516506,0.866549,0.7196127,0.0050002\n2018-10-27 13:20:00,0.0149856,0.0529183,0.8673155,0.7121144,0.0049979\n2018-10-27 13:10:00,0.0137501,0.053315,0.8578097,0.7197613,0.0054209\n2018-10-27 13:00:00,0.0154252,0.0554688,0.899432,0.7200638,0.0067252\n2018-10-27 12:50:00,0.0145866,0.0495922,0.8404341,0.7011141,0.0041688\n2018-10-27 12:40:00,0.0162366,0.0595954,0.8827475,0.7020573,0.0041636\n",
+ "min": 0,
+ "max": 0
+}
+```
+
+## Downloading data query result files
+
+Following the [Google Visualization Provider guidelines](https://developers.google.com/chart/interactive/docs/dev/implementing_data_source),
+netdata supports parsing `tqx` options.
+
+Using these options, any netdata data query can instruct the web browser to download
+the result and save it under a given filename.
+
+For example, to download a CSV file with CPU utilization of the last hour,
+[click here](https://registry.my-netdata.io/api/v1/data?chart=system.cpu&after=-3600&format=csv&options=nonzero&tqx=outFileName:system+cpu+utilization+of+the+last_hour.csv).
+
+
+This is done by appending `&tqx=outFileName:FILENAME` to any data query.
+The output will be in the format given with `&format=`.
diff --git a/web/api/formatters/charts2json.c b/web/api/formatters/charts2json.c
new file mode 100644
index 000000000..f60f7f540
--- /dev/null
+++ b/web/api/formatters/charts2json.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "charts2json.h"
+
+// generate JSON for the /api/v1/charts API call
+
+void charts2json(RRDHOST *host, BUFFER *wb) {
+    static char *custom_dashboard_info_js_filename = NULL;
+    size_t c, dimensions = 0, memory = 0, alarms = 0;
+    RRDSET *st;
+
+    time_t now = now_realtime_sec();
+
+    if(unlikely(!custom_dashboard_info_js_filename))
+        custom_dashboard_info_js_filename = config_get(CONFIG_SECTION_WEB, "custom dashboard_info.js", "");
+
+    buffer_sprintf(wb, "{\n"
+                       "\t\"hostname\": \"%s\""
+                       ",\n\t\"version\": \"%s\""
+                       ",\n\t\"os\": \"%s\""
+                       ",\n\t\"timezone\": \"%s\""
+                       ",\n\t\"update_every\": %d"
+                       ",\n\t\"history\": %ld"
+                       ",\n\t\"custom_info\": \"%s\""
+                       ",\n\t\"charts\": {"
+                   , host->hostname
+                   , host->program_version
+                   , host->os
+                   , host->timezone
+                   , host->rrd_update_every
+                   , host->rrd_history_entries
+                   , custom_dashboard_info_js_filename
+    );
+
+    c = 0;
+    rrdhost_rdlock(host);
+    rrdset_foreach_read(st, host) {
+        if(rrdset_is_available_for_viewers(st)) {
+            if(c) buffer_strcat(wb, ",");
+            buffer_strcat(wb, "\n\t\t\"");
+            buffer_strcat(wb, st->id);
+            buffer_strcat(wb, "\": ");
+            rrdset2json(st, wb, &dimensions, &memory);
+
+            c++;
+            st->last_accessed_time = now;
+        }
+    }
+
+    RRDCALC *rc;
+    for(rc = host->alarms; rc ; rc = rc->next) {
+        if(rc->rrdset)
+            alarms++;
+    }
+    rrdhost_unlock(host);
+
+    buffer_sprintf(wb
+                   , "\n\t}"
+                     ",\n\t\"charts_count\": %zu"
+                     ",\n\t\"dimensions_count\": %zu"
+                     ",\n\t\"alarms_count\": %zu"
+                     ",\n\t\"rrd_memory_bytes\": %zu"
+                     ",\n\t\"hosts_count\": %zu"
+                     ",\n\t\"hosts\": ["
+                   , c
+                   , dimensions
+                   , alarms
+                   , memory
+                   , rrd_hosts_available
+    );
+
+    if(unlikely(rrd_hosts_available > 1)) {
+        rrd_rdlock();
+
+        size_t found = 0;
+        RRDHOST *h;
+        rrdhost_foreach_read(h) {
+            if(!rrdhost_should_be_removed(h, host, now)) {
+                buffer_sprintf(wb
+                               , "%s\n\t\t{"
+                                 "\n\t\t\t\"hostname\": \"%s\""
+                                 "\n\t\t}"
+                               , (found > 0) ? "," : ""
+                               , h->hostname
+                );
+
+                found++;
+            }
+        }
+
+        rrd_unlock();
+    }
+    else {
+        buffer_sprintf(wb
+                       , "\n\t\t{"
+                         "\n\t\t\t\"hostname\": \"%s\""
+                         "\n\t\t}"
+                       , host->hostname
+        );
+    }
+
+    buffer_sprintf(wb, "\n\t]\n}\n");
+}
diff --git a/web/api/formatters/charts2json.h b/web/api/formatters/charts2json.h
new file mode 100644
index 000000000..5d6d80060
--- /dev/null
+++ b/web/api/formatters/charts2json.h
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_API_FORMATTER_CHARTS2JSON_H
+#define NETDATA_API_FORMATTER_CHARTS2JSON_H
+
+#include "rrd2json.h"
+
+extern void charts2json(RRDHOST *host, BUFFER *wb);
+
+#endif //NETDATA_API_FORMATTER_CHARTS2JSON_H
diff --git a/web/api/formatters/csv/Makefile.am b/web/api/formatters/csv/Makefile.am
new file mode 100644
index 000000000..19554bed8
--- /dev/null
+++ b/web/api/formatters/csv/Makefile.am
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+AUTOMAKE_OPTIONS = subdir-objects
+MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
+
+dist_noinst_DATA = \
+	README.md \
+	$(NULL)
diff --git a/web/api/formatters/csv/Makefile.in b/web/api/formatters/csv/Makefile.in
new file mode 100644
index 000000000..9ba808443
--- /dev/null
+++ b/web/api/formatters/csv/Makefile.in
@@ -0,0 +1,464 @@
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+
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+
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+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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+webdir = @webdir@
+AUTOMAKE_OPTIONS = subdir-objects
+MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
+dist_noinst_DATA = \
+	README.md \
+	$(NULL)
+
+all: all-am
+
+.SUFFIXES:
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu web/api/formatters/csv/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu web/api/formatters/csv/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+tags TAGS:
+
+ctags CTAGS:
+
+cscope cscopelist:
+
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(DATA)
+installdirs:
+install: install-am
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+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
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+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+clean: clean-am
+
+clean-am: clean-generic mostlyclean-am
+
+distclean: distclean-am
+	-rm -f Makefile
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+dvi: dvi-am
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+html: html-am
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+install-dvi-am:
+
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+install-html: install-html-am
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+
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+
+maintainer-clean: maintainer-clean-am
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
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+.PHONY: all all-am check check-am clean clean-generic cscopelist-am \
+	ctags-am distclean distclean-generic distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
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+	install-info-am install-man install-pdf install-pdf-am \
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+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/web/api/formatters/csv/README.md b/web/api/formatters/csv/README.md
new file mode 100644
index 000000000..4711dcbd1
--- /dev/null
+++ b/web/api/formatters/csv/README.md
@@ -0,0 +1,139 @@
+# CSV formatter
+
+The CSV formatter presents [results of database queries](../../queries) in the following formats:
+
+format|content type|description
+:---:|:---:|:-----
+`csv`|text/plain|a text table, comma separated, with a header line (dimension names) and `\r\n` at the end of the lines
+`csvjsonarray`|application/json|a JSON array, with each row as another array (the first row has the dimension names)
+`tsv`|text/plain|like `csv` but TAB is used instead of comma to separate values (MS Excel flavor)
+`html`|text/html|an html table
+`markdown`|text/plain|markdown table
+
+In all formats the date and time is the first column.
+
+The CSV formatter respects the following API `&options=`:
+
+option|supported|description
+:---:|:---:|:---
+`nonzero`|yes|to return only the dimensions that have at least a non-zero value
+`flip`|yes|to return the rows older to newer (the default is newer to older)
+`seconds`|yes|to return the date and time in unix timestamp
+`ms`|yes|to return the date and time in unit timestamp as milliseconds
+`percent`|yes|to replace all values with their percentage over the row total
+`abs`|yes|to turn all values positive
+`null2zero`|yes|to replace gaps with zeros (the default prints the string `null`
+
+
+## Examples
+
+Get the system total bandwidth for all physical network interfaces, over the last hour,
+in 6 rows (one for every 10 minutes), in `csv` format:
+
+Netdata always returns bandwidth in `kilobits`.
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=system.net&format=csv&after=-3600&group=sum&points=6&options=abs'
+time,received,sent
+2018-10-26 23:50:00,90214.67847,215137.79762
+2018-10-26 23:40:00,90126.32286,238587.57522
+2018-10-26 23:30:00,86061.22688,213389.23526
+2018-10-26 23:20:00,85590.75164,206129.01608
+2018-10-26 23:10:00,83163.30691,194311.77384
+2018-10-26 23:00:00,85167.29657,197538.07773
+```
+
+---
+
+Get the max RAM used by the SQL server and any cron jobs, over the last hour, in 2 rows (one for every 30
+minutes), in `tsv` format, and format the date and time as unix timestamp:
+
+Netdata always returns memory in `MB`.
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=apps.mem&format=tsv&after=-3600&group=max&points=2&options=nonzero,seconds&dimensions=sql,cron'
+time	sql	cron
+1540598400	61.95703	0.25
+1540596600	61.95703	0.25
+```
+
+---
+
+Get an HTML table of the last 4 values (4 seconds) of system CPU utilization:
+
+Netdata always returns CPU utilization as `%`.
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=system.cpu&format=html&after=-4&options=nonzero'
+<html>
+<center>
+<table border="0" cellpadding="5" cellspacing="5">
+<tr><td>time</td><td>softirq</td><td>user</td><td>system</td></tr>
+<tr><td>2018-10-27 00:16:07</td><td>0.25</td><td>1</td><td>0.75</td></tr>
+<tr><td>2018-10-27 00:16:06</td><td>0</td><td>1.0025063</td><td>0.5012531</td></tr>
+<tr><td>2018-10-27 00:16:05</td><td>0</td><td>1</td><td>0.75</td></tr>
+<tr><td>2018-10-27 00:16:04</td><td>0</td><td>1.0025063</td><td>0.7518797</td></tr>
+</table>
+</center>
+</html>
+```
+
+This is how it looks when rendered by a web browser:
+
+![image](https://user-images.githubusercontent.com/2662304/47597887-bafbf480-d99c-11e8-864a-d880bb8d2e5b.png)
+
+
+---
+
+Get a JSON array with the average bandwidth rate of the mysql server, over the last hour, in 6 values
+(one every 10 minutes), and return the date and time in milliseconds:
+
+Netdata always returns bandwidth rates in `kilobits/s`.
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=mysql_local.net&format=csvjsonarray&after=-3600&points=6&group=average&options=abs,ms'
+[
+["time","in","out"],
+[1540599600000,0.7499986,120.2810185],
+[1540599000000,0.7500019,120.2815509],
+[1540598400000,0.7499999,120.2812319],
+[1540597800000,0.7500044,120.2819634],
+[1540597200000,0.7499968,120.2807337],
+[1540596600000,0.7499988,120.2810527]
+]
+``` 
+
+---
+
+Get the number of processes started per minute, for the last 10 minutes, in `markdown` format:
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=system.forks&format=markdown&after=-600&points=10&group=sum'
+time|started
+:---:|:---:
+2018-10-27 03:52:00|245.1706149
+2018-10-27 03:51:00|152.6654636
+2018-10-27 03:50:00|163.1755789
+2018-10-27 03:49:00|176.1574766
+2018-10-27 03:48:00|178.0137076
+2018-10-27 03:47:00|183.8306543
+2018-10-27 03:46:00|264.1635621
+2018-10-27 03:45:00|205.001551
+2018-10-27 03:44:00|7026.9852167
+2018-10-27 03:43:00|205.9904794
+```
+
+And this is how it looks when formatted:
+
+time|started
+:---:|:---:
+2018-10-27 03:52:00|245.1706149
+2018-10-27 03:51:00|152.6654636
+2018-10-27 03:50:00|163.1755789
+2018-10-27 03:49:00|176.1574766
+2018-10-27 03:48:00|178.0137076
+2018-10-27 03:47:00|183.8306543
+2018-10-27 03:46:00|264.1635621
+2018-10-27 03:45:00|205.001551
+2018-10-27 03:44:00|7026.9852167
+2018-10-27 03:43:00|205.9904794
diff --git a/web/api/formatters/csv/csv.c b/web/api/formatters/csv/csv.c
new file mode 100644
index 000000000..53bf29828
--- /dev/null
+++ b/web/api/formatters/csv/csv.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "libnetdata/libnetdata.h"
+#include "csv.h"
+
+void rrdr2csv(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS options, const char *startline, const char *separator, const char *endline, const char *betweenlines) {
+    rrdset_check_rdlock(r->st);
+
+    //info("RRD2CSV(): %s: BEGIN", r->st->id);
+    long c, i;
+    RRDDIM *d;
+
+    // print the csv header
+    for(c = 0, i = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
+        if(unlikely(r->od[c] & RRDR_DIMENSION_HIDDEN)) continue;
+        if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_DIMENSION_NONZERO))) continue;
+
+        if(!i) {
+            buffer_strcat(wb, startline);
+            if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
+            buffer_strcat(wb, "time");
+            if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
+        }
+        buffer_strcat(wb, separator);
+        if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
+        buffer_strcat(wb, d->name);
+        if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
+        i++;
+    }
+    buffer_strcat(wb, endline);
+
+    if(format == DATASOURCE_CSV_MARKDOWN) {
+        // print the --- line after header
+        for(c = 0, i = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
+            if(unlikely(r->od[c] & RRDR_DIMENSION_HIDDEN)) continue;
+            if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_DIMENSION_NONZERO))) continue;
+
+            if(!i) {
+                buffer_strcat(wb, startline);
+                if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
+                buffer_strcat(wb, ":---:");
+                if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
+            }
+            buffer_strcat(wb, separator);
+            if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
+            buffer_strcat(wb, ":---:");
+            if(options & RRDR_OPTION_LABEL_QUOTES) buffer_strcat(wb, "\"");
+            i++;
+        }
+        buffer_strcat(wb, endline);
+    }
+
+    if(!i) {
+        // no dimensions present
+        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 ];
+
+        buffer_strcat(wb, betweenlines);
+        buffer_strcat(wb, startline);
+
+        time_t now = r->t[i];
+
+        if((options & RRDR_OPTION_SECONDS) || (options & RRDR_OPTION_MILLISECONDS)) {
+            // print the timestamp of the line
+            buffer_rrd_value(wb, (calculated_number)now);
+            // in ms
+            if(options & RRDR_OPTION_MILLISECONDS) buffer_strcat(wb, "000");
+        }
+        else {
+            // generate the local date time
+            struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
+            if(!tm) { error("localtime() failed."); continue; }
+            buffer_date(wb, tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
+        }
+
+        int set_min_max = 0;
+        if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
+            total = 0;
+            for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->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, d = r->st->dimensions; d && c < r->d ;c++, d = d->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, separator);
+
+            calculated_number n = cn[c];
+
+            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, endline);
+    }
+    //info("RRD2CSV(): %s: END", r->st->id);
+}
diff --git a/web/api/formatters/csv/csv.h b/web/api/formatters/csv/csv.h
new file mode 100644
index 000000000..a89742d34
--- /dev/null
+++ b/web/api/formatters/csv/csv.h
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_API_FORMATTER_CSV_H
+#define NETDATA_API_FORMATTER_CSV_H
+
+#include "web/api/queries/rrdr.h"
+
+extern void rrdr2csv(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS options, const char *startline, const char *separator, const char *endline, const char *betweenlines);
+
+#include "../rrd2json.h"
+
+#endif //NETDATA_API_FORMATTER_CSV_H
diff --git a/web/api/formatters/json/Makefile.am b/web/api/formatters/json/Makefile.am
new file mode 100644
index 000000000..19554bed8
--- /dev/null
+++ b/web/api/formatters/json/Makefile.am
@@ -0,0 +1,8 @@
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new file mode 100644
index 000000000..5289347d0
--- /dev/null
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diff --git a/web/api/formatters/json/README.md b/web/api/formatters/json/README.md
new file mode 100644
index 000000000..4f0bad5ca
--- /dev/null
+++ b/web/api/formatters/json/README.md
@@ -0,0 +1,150 @@
+# JSON formatter
+
+The CSV formatter presents [results of database queries](../../queries) in the following formats:
+
+format|content type|description
+:---:|:---:|:-----
+`json`|application/json|return the query result as a json object
+`jsonp`|application/json|return the query result as a JSONP javascript callback
+`datatable`|application/json|return the query result as a Google `datatable`
+`datasource`|application/json|return the query result as a Google Visualization Provider `datasource` javascript callback
+
+The CSV formatter respects the following API `&options=`:
+
+option|supported|description
+:---:|:---:|:---
+`google_json`|yes|enable the Google flavor of JSON (using double quotes for strings and `Date()` function for dates
+`objectrows`|yes|return each row as an object, instead of an array
+`nonzero`|yes|to return only the dimensions that have at least a non-zero value
+`flip`|yes|to return the rows older to newer (the default is newer to older)
+`seconds`|yes|to return the date and time in unix timestamp
+`ms`|yes|to return the date and time in unit timestamp as milliseconds
+`percent`|yes|to replace all values with their percentage over the row total
+`abs`|yes|to turn all values positive
+`null2zero`|yes|to replace gaps with zeros (the default prints the string `null`
+
+## Examples
+
+To show the differences between each format, in the following examples we query the same
+chart (having just one dimension called `active`), changing only the query `format` and its `options`.
+
+> Using `format=json` and `options=`
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=nginx_local.connections&after=-3600&points=6&group=average&format=json&options='
+{
+ "labels": ["time", "active"],
+    "data":
+ [
+      [ 1540644600, 224.2516667],
+      [ 1540644000, 229.29],
+      [ 1540643400, 222.41],
+      [ 1540642800, 226.6816667],
+      [ 1540642200, 246.4083333],
+      [ 1540641600, 241.0966667]
+  ]
+}
+```
+
+> Using `format=json` and `options=objectrows`
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=nginx_local.connections&after=-3600&points=6&group=average&format=json&options=objectrows'
+{
+ "labels": ["time", "active"],
+    "data":
+ [
+      { "time": 1540644600, "active": 224.2516667},
+      { "time": 1540644000, "active": 229.29},
+      { "time": 1540643400, "active": 222.41},
+      { "time": 1540642800, "active": 226.6816667},
+      { "time": 1540642200, "active": 246.4083333},
+      { "time": 1540641600, "active": 241.0966667}
+  ]
+}
+```
+
+> Using `format=json` and `options=objectrows,google_json`
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=nginx_local.connections&after=-3600&points=6&group=average&formatjson&options=objectrows,google_json'
+{
+ "labels": ["time", "active"],
+    "data":
+ [
+      { "time": new Date(2018,9,27,12,50,0), "active": 224.2516667},
+      { "time": new Date(2018,9,27,12,40,0), "active": 229.29},
+      { "time": new Date(2018,9,27,12,30,0), "active": 222.41},
+      { "time": new Date(2018,9,27,12,20,0), "active": 226.6816667},
+      { "time": new Date(2018,9,27,12,10,0), "active": 246.4083333},
+      { "time": new Date(2018,9,27,12,0,0), "active": 241.0966667}
+  ]
+}
+```
+
+> Using `format=jsonp` and `options=`
+
+```bash
+curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=nginx_local.connections&after=-3600&points=6&group=average&formjsonp&options='
+callback({
+ "labels": ["time", "active"],
+    "data":
+ [
+      [ 1540645200, 235.885],
+      [ 1540644600, 224.2516667],
+      [ 1540644000, 229.29],
+      [ 1540643400, 222.41],
+      [ 1540642800, 226.6816667],
+      [ 1540642200, 246.4083333]
+  ]
+});
+```
+
+> Using `format=datatable` and `options=`
+
+```bash
+$ curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=nginx_local.connections&after=-3600&points=6&group=average&formdatatable&options='
+{
+ "cols":
+ [
+        {"id":"","label":"time","pattern":"","type":"datetime"},
+        {"id":"","label":"","pattern":"","type":"string","p":{"role":"annotation"}},
+        {"id":"","label":"","pattern":"","type":"string","p":{"role":"annotationText"}},
+     {"id":"","label":"active","pattern":"","type":"number"}
+  ],
+    "rows":
+ [
+        {"c":[{"v":"Date(2018,9,27,13,0,0)"},{"v":null},{"v":null},{"v":235.885}]},
+        {"c":[{"v":"Date(2018,9,27,12,50,0)"},{"v":null},{"v":null},{"v":224.2516667}]},
+        {"c":[{"v":"Date(2018,9,27,12,40,0)"},{"v":null},{"v":null},{"v":229.29}]},
+        {"c":[{"v":"Date(2018,9,27,12,30,0)"},{"v":null},{"v":null},{"v":222.41}]},
+        {"c":[{"v":"Date(2018,9,27,12,20,0)"},{"v":null},{"v":null},{"v":226.6816667}]},
+        {"c":[{"v":"Date(2018,9,27,12,10,0)"},{"v":null},{"v":null},{"v":246.4083333}]}
+  ]
+}
+```
+
+> Using `format=datasource` and `options=`
+
+```bash
+curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=nginx_local.connections&after=-3600&points=6&group=average&format=datasource&options='
+google.visualization.Query.setResponse({version:'0.6',reqId:'0',status:'ok',sig:'1540645368',table:{
+ "cols":
+ [
+        {"id":"","label":"time","pattern":"","type":"datetime"},
+        {"id":"","label":"","pattern":"","type":"string","p":{"role":"annotation"}},
+        {"id":"","label":"","pattern":"","type":"string","p":{"role":"annotationText"}},
+     {"id":"","label":"active","pattern":"","type":"number"}
+  ],
+    "rows":
+ [
+        {"c":[{"v":"Date(2018,9,27,13,0,0)"},{"v":null},{"v":null},{"v":235.885}]},
+        {"c":[{"v":"Date(2018,9,27,12,50,0)"},{"v":null},{"v":null},{"v":224.2516667}]},
+        {"c":[{"v":"Date(2018,9,27,12,40,0)"},{"v":null},{"v":null},{"v":229.29}]},
+        {"c":[{"v":"Date(2018,9,27,12,30,0)"},{"v":null},{"v":null},{"v":222.41}]},
+        {"c":[{"v":"Date(2018,9,27,12,20,0)"},{"v":null},{"v":null},{"v":226.6816667}]},
+        {"c":[{"v":"Date(2018,9,27,12,10,0)"},{"v":null},{"v":null},{"v":246.4083333}]}
+  ]
+}});
+```
+
diff --git a/web/api/formatters/json/json.c b/web/api/formatters/json/json.c
new file mode 100644
index 000000000..66b3b9c83
--- /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);
+}
diff --git a/web/api/formatters/json/json.h b/web/api/formatters/json/json.h
new file mode 100644
index 000000000..01363ce01
--- /dev/null
+++ b/web/api/formatters/json/json.h
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_API_FORMATTER_JSON_H
+#define NETDATA_API_FORMATTER_JSON_H
+
+#include "../rrd2json.h"
+
+extern void rrdr2json(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, int datatable);
+
+#endif //NETDATA_API_FORMATTER_JSON_H
diff --git a/web/api/formatters/json_wrapper.c b/web/api/formatters/json_wrapper.c
new file mode 100644
index 000000000..253883568
--- /dev/null
+++ b/web/api/formatters/json_wrapper.c
@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "json_wrapper.h"
+
+void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS options, int string_value) {
+    rrdset_check_rdlock(r->st);
+
+    long rows = rrdr_rows(r);
+    long c, i;
+    RRDDIM *rd;
+
+    //info("JSONWRAPPER(): %s: BEGIN", r->st->id);
+    char kq[2] = "",                    // key quote
+            sq[2] = "";                     // string quote
+
+    if( options & RRDR_OPTION_GOOGLE_JSON ) {
+        kq[0] = '\0';
+        sq[0] = '\'';
+    }
+    else {
+        kq[0] = '"';
+        sq[0] = '"';
+    }
+
+    buffer_sprintf(wb, "{\n"
+                       "   %sapi%s: 1,\n"
+                       "   %sid%s: %s%s%s,\n"
+                       "   %sname%s: %s%s%s,\n"
+                       "   %sview_update_every%s: %d,\n"
+                       "   %supdate_every%s: %d,\n"
+                       "   %sfirst_entry%s: %u,\n"
+                       "   %slast_entry%s: %u,\n"
+                       "   %sbefore%s: %u,\n"
+                       "   %safter%s: %u,\n"
+                       "   %sdimension_names%s: ["
+                   , kq, kq
+                   , kq, kq, sq, r->st->id, sq
+                   , kq, kq, sq, r->st->name, sq
+                   , kq, kq, r->update_every
+                   , kq, kq, r->st->update_every
+                   , kq, kq, (uint32_t)rrdset_first_entry_t(r->st)
+                   , kq, kq, (uint32_t)rrdset_last_entry_t(r->st)
+                   , kq, kq, (uint32_t)r->before
+                   , kq, kq, (uint32_t)r->after
+                   , kq, kq);
+
+    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;
+
+        if(i) buffer_strcat(wb, ", ");
+        buffer_strcat(wb, sq);
+        buffer_strcat(wb, rd->name);
+        buffer_strcat(wb, sq);
+        i++;
+    }
+    if(!i) {
+#ifdef NETDATA_INTERNAL_CHECKS
+        error("RRDR is empty for %s (RRDR has %d dimensions, options is 0x%08x)", r->st->id, r->d, options);
+#endif
+        rows = 0;
+        buffer_strcat(wb, sq);
+        buffer_strcat(wb, "no data");
+        buffer_strcat(wb, sq);
+    }
+
+    buffer_sprintf(wb, "],\n"
+                       "   %sdimension_ids%s: ["
+                   , kq, kq);
+
+    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;
+
+        if(i) buffer_strcat(wb, ", ");
+        buffer_strcat(wb, sq);
+        buffer_strcat(wb, rd->id);
+        buffer_strcat(wb, sq);
+        i++;
+    }
+    if(!i) {
+        rows = 0;
+        buffer_strcat(wb, sq);
+        buffer_strcat(wb, "no data");
+        buffer_strcat(wb, sq);
+    }
+
+    buffer_sprintf(wb, "],\n"
+                       "   %slatest_values%s: ["
+                   , kq, kq);
+
+    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;
+
+        if(i) buffer_strcat(wb, ", ");
+        i++;
+
+        storage_number n = rd->values[rrdset_last_slot(r->st)];
+
+        if(!does_storage_number_exist(n))
+            buffer_strcat(wb, "null");
+        else
+            buffer_rrd_value(wb, unpack_storage_number(n));
+    }
+    if(!i) {
+        rows = 0;
+        buffer_strcat(wb, "null");
+    }
+
+    buffer_sprintf(wb, "],\n"
+                       "   %sview_latest_values%s: ["
+                   , kq, kq);
+
+    i = 0;
+    if(rows) {
+        calculated_number total = 1;
+
+        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 *cn = &r->v[ (rrdr_rows(r) - 1) * r->d ];
+                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;
+        }
+
+        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;
+
+            if(i) buffer_strcat(wb, ", ");
+            i++;
+
+            calculated_number *cn = &r->v[ (rrdr_rows(r) - 1) * r->d ];
+            RRDR_VALUE_FLAGS *co = &r->o[ (rrdr_rows(r) - 1) * r->d ];
+            calculated_number n = cn[c];
+
+            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;
+
+                buffer_rrd_value(wb, n);
+            }
+        }
+    }
+    if(!i) {
+        rows = 0;
+        buffer_strcat(wb, "null");
+    }
+
+    buffer_sprintf(wb, "],\n"
+                       "   %sdimensions%s: %ld,\n"
+                       "   %spoints%s: %ld,\n"
+                       "   %sformat%s: %s"
+                   , kq, kq, i
+                   , kq, kq, rows
+                   , kq, kq, sq
+    );
+
+    rrdr_buffer_print_format(wb, format);
+
+    buffer_sprintf(wb, "%s,\n"
+                       "   %sresult%s: "
+                   , sq
+                   , kq, kq
+    );
+
+    if(string_value) buffer_strcat(wb, sq);
+    //info("JSONWRAPPER(): %s: END", r->st->id);
+}
+
+void rrdr_json_wrapper_end(RRDR *r, BUFFER *wb, uint32_t format, uint32_t options, int string_value) {
+    (void)format;
+
+    char kq[2] = "",                    // key quote
+            sq[2] = "";                     // string quote
+
+    if( options & RRDR_OPTION_GOOGLE_JSON ) {
+        kq[0] = '\0';
+        sq[0] = '\'';
+    }
+    else {
+        kq[0] = '"';
+        sq[0] = '"';
+    }
+
+    if(string_value) buffer_strcat(wb, sq);
+
+    buffer_sprintf(wb, ",\n %smin%s: ", kq, kq);
+    buffer_rrd_value(wb, r->min);
+    buffer_sprintf(wb, ",\n %smax%s: ", kq, kq);
+    buffer_rrd_value(wb, r->max);
+    buffer_strcat(wb, "\n}\n");
+}
diff --git a/web/api/formatters/json_wrapper.h b/web/api/formatters/json_wrapper.h
new file mode 100644
index 000000000..7cb7d3453
--- /dev/null
+++ b/web/api/formatters/json_wrapper.h
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_API_FORMATTER_JSON_WRAPPER_H
+#define NETDATA_API_FORMATTER_JSON_WRAPPER_H
+
+#include "rrd2json.h"
+
+extern void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS options, int string_value);
+extern void rrdr_json_wrapper_end(RRDR *r, BUFFER *wb, uint32_t format, uint32_t options, int string_value);
+
+#endif //NETDATA_API_FORMATTER_JSON_WRAPPER_H
diff --git a/web/api/formatters/rrd2json.c b/web/api/formatters/rrd2json.c
new file mode 100644
index 000000000..5cdcc80ff
--- /dev/null
+++ b/web/api/formatters/rrd2json.c
@@ -0,0 +1,298 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "web/api/web_api_v1.h"
+
+void rrd_stats_api_v1_chart(RRDSET *st, BUFFER *wb) {
+    rrdset2json(st, wb, NULL, NULL);
+}
+
+void rrdr_buffer_print_format(BUFFER *wb, uint32_t format)  {
+    switch(format) {
+        case DATASOURCE_JSON:
+            buffer_strcat(wb, DATASOURCE_FORMAT_JSON);
+            break;
+
+        case DATASOURCE_DATATABLE_JSON:
+            buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSON);
+            break;
+
+        case DATASOURCE_DATATABLE_JSONP:
+            buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSONP);
+            break;
+
+        case DATASOURCE_JSONP:
+            buffer_strcat(wb, DATASOURCE_FORMAT_JSONP);
+            break;
+
+        case DATASOURCE_SSV:
+            buffer_strcat(wb, DATASOURCE_FORMAT_SSV);
+            break;
+
+        case DATASOURCE_CSV:
+            buffer_strcat(wb, DATASOURCE_FORMAT_CSV);
+            break;
+
+        case DATASOURCE_TSV:
+            buffer_strcat(wb, DATASOURCE_FORMAT_TSV);
+            break;
+
+        case DATASOURCE_HTML:
+            buffer_strcat(wb, DATASOURCE_FORMAT_HTML);
+            break;
+
+        case DATASOURCE_JS_ARRAY:
+            buffer_strcat(wb, DATASOURCE_FORMAT_JS_ARRAY);
+            break;
+
+        case DATASOURCE_SSV_COMMA:
+            buffer_strcat(wb, DATASOURCE_FORMAT_SSV_COMMA);
+            break;
+
+        default:
+            buffer_strcat(wb, "unknown");
+            break;
+    }
+}
+
+int rrdset2value_api_v1(
+          RRDSET *st
+        , BUFFER *wb
+        , calculated_number *n
+        , const char *dimensions
+        , long points
+        , long long after
+        , long long before
+        , int group_method
+        , long group_time
+        , uint32_t options
+        , time_t *db_after
+        , time_t *db_before
+        , int *value_is_null
+) {
+    RRDR *r = rrd2rrdr(st, points, after, before, group_method, group_time, options, dimensions);
+    if(!r) {
+        if(value_is_null) *value_is_null = 1;
+        return 500;
+    }
+
+    if(rrdr_rows(r) == 0) {
+        rrdr_free(r);
+
+        if(db_after)  *db_after  = 0;
+        if(db_before) *db_before = 0;
+        if(value_is_null) *value_is_null = 1;
+
+        return 400;
+    }
+
+    if(wb) {
+        if (r->result_options & RRDR_RESULT_OPTION_RELATIVE)
+            buffer_no_cacheable(wb);
+        else if (r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
+            buffer_cacheable(wb);
+    }
+
+    if(db_after)  *db_after  = r->after;
+    if(db_before) *db_before = r->before;
+
+    long i = (!(options & RRDR_OPTION_REVERSED))?rrdr_rows(r) - 1:0;
+    *n = rrdr2value(r, i, options, value_is_null);
+
+    rrdr_free(r);
+    return 200;
+}
+
+int rrdset2anything_api_v1(
+          RRDSET *st
+        , BUFFER *wb
+        , BUFFER *dimensions
+        , uint32_t format
+        , long points
+        , long long after
+        , long long before
+        , int group_method
+        , long group_time
+        , uint32_t options
+        , time_t *latest_timestamp
+) {
+    st->last_accessed_time = now_realtime_sec();
+
+    RRDR *r = rrd2rrdr(st, points, after, before, group_method, group_time, options, dimensions?buffer_tostring(dimensions):NULL);
+    if(!r) {
+        buffer_strcat(wb, "Cannot generate output with these parameters on this chart.");
+        return 500;
+    }
+
+    if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
+        buffer_no_cacheable(wb);
+    else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
+        buffer_cacheable(wb);
+
+    if(latest_timestamp && rrdr_rows(r) > 0)
+        *latest_timestamp = r->before;
+
+    switch(format) {
+    case DATASOURCE_SSV:
+        if(options & RRDR_OPTION_JSON_WRAP) {
+            wb->contenttype = CT_APPLICATION_JSON;
+            rrdr_json_wrapper_begin(r, wb, format, options, 1);
+            rrdr2ssv(r, wb, options, "", " ", "");
+            rrdr_json_wrapper_end(r, wb, format, options, 1);
+        }
+        else {
+            wb->contenttype = CT_TEXT_PLAIN;
+            rrdr2ssv(r, wb, options, "", " ", "");
+        }
+        break;
+
+    case DATASOURCE_SSV_COMMA:
+        if(options & RRDR_OPTION_JSON_WRAP) {
+            wb->contenttype = CT_APPLICATION_JSON;
+            rrdr_json_wrapper_begin(r, wb, format, options, 1);
+            rrdr2ssv(r, wb, options, "", ",", "");
+            rrdr_json_wrapper_end(r, wb, format, options, 1);
+        }
+        else {
+            wb->contenttype = CT_TEXT_PLAIN;
+            rrdr2ssv(r, wb, options, "", ",", "");
+        }
+        break;
+
+    case DATASOURCE_JS_ARRAY:
+        if(options & RRDR_OPTION_JSON_WRAP) {
+            wb->contenttype = CT_APPLICATION_JSON;
+            rrdr_json_wrapper_begin(r, wb, format, options, 0);
+            rrdr2ssv(r, wb, options, "[", ",", "]");
+            rrdr_json_wrapper_end(r, wb, format, options, 0);
+        }
+        else {
+            wb->contenttype = CT_APPLICATION_JSON;
+            rrdr2ssv(r, wb, options, "[", ",", "]");
+        }
+        break;
+
+    case DATASOURCE_CSV:
+        if(options & RRDR_OPTION_JSON_WRAP) {
+            wb->contenttype = CT_APPLICATION_JSON;
+            rrdr_json_wrapper_begin(r, wb, format, options, 1);
+            rrdr2csv(r, wb, format, options, "", ",", "\\n", "");
+            rrdr_json_wrapper_end(r, wb, format, options, 1);
+        }
+        else {
+            wb->contenttype = CT_TEXT_PLAIN;
+            rrdr2csv(r, wb, format, options, "", ",", "\r\n", "");
+        }
+        break;
+
+    case DATASOURCE_CSV_MARKDOWN:
+        if(options & RRDR_OPTION_JSON_WRAP) {
+            wb->contenttype = CT_APPLICATION_JSON;
+            rrdr_json_wrapper_begin(r, wb, format, options, 1);
+            rrdr2csv(r, wb, format, options, "", "|", "\\n", "");
+            rrdr_json_wrapper_end(r, wb, format, options, 1);
+        }
+        else {
+            wb->contenttype = CT_TEXT_PLAIN;
+            rrdr2csv(r, wb, format, options, "", "|", "\r\n", "");
+        }
+        break;
+
+    case DATASOURCE_CSV_JSON_ARRAY:
+        wb->contenttype = CT_APPLICATION_JSON;
+        if(options & RRDR_OPTION_JSON_WRAP) {
+            rrdr_json_wrapper_begin(r, wb, format, options, 0);
+            buffer_strcat(wb, "[\n");
+            rrdr2csv(r, wb, format, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
+            buffer_strcat(wb, "\n]");
+            rrdr_json_wrapper_end(r, wb, format, options, 0);
+        }
+        else {
+            wb->contenttype = CT_APPLICATION_JSON;
+            buffer_strcat(wb, "[\n");
+            rrdr2csv(r, wb, format, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
+            buffer_strcat(wb, "\n]");
+        }
+        break;
+
+    case DATASOURCE_TSV:
+        if(options & RRDR_OPTION_JSON_WRAP) {
+            wb->contenttype = CT_APPLICATION_JSON;
+            rrdr_json_wrapper_begin(r, wb, format, options, 1);
+            rrdr2csv(r, wb, format, options, "", "\t", "\\n", "");
+            rrdr_json_wrapper_end(r, wb, format, options, 1);
+        }
+        else {
+            wb->contenttype = CT_TEXT_PLAIN;
+            rrdr2csv(r, wb, format, options, "", "\t", "\r\n", "");
+        }
+        break;
+
+    case DATASOURCE_HTML:
+        if(options & RRDR_OPTION_JSON_WRAP) {
+            wb->contenttype = CT_APPLICATION_JSON;
+            rrdr_json_wrapper_begin(r, wb, format, options, 1);
+            buffer_strcat(wb, "<html>\\n<center>\\n<table border=\\\"0\\\" cellpadding=\\\"5\\\" cellspacing=\\\"5\\\">\\n");
+            rrdr2csv(r, wb, format, options, "<tr><td>", "</td><td>", "</td></tr>\\n", "");
+            buffer_strcat(wb, "</table>\\n</center>\\n</html>\\n");
+            rrdr_json_wrapper_end(r, wb, format, options, 1);
+        }
+        else {
+            wb->contenttype = CT_TEXT_HTML;
+            buffer_strcat(wb, "<html>\n<center>\n<table border=\"0\" cellpadding=\"5\" cellspacing=\"5\">\n");
+            rrdr2csv(r, wb, format, options, "<tr><td>", "</td><td>", "</td></tr>\n", "");
+            buffer_strcat(wb, "</table>\n</center>\n</html>\n");
+        }
+        break;
+
+    case DATASOURCE_DATATABLE_JSONP:
+        wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
+
+        if(options & RRDR_OPTION_JSON_WRAP)
+            rrdr_json_wrapper_begin(r, wb, format, options, 0);
+
+        rrdr2json(r, wb, options, 1);
+
+        if(options & RRDR_OPTION_JSON_WRAP)
+            rrdr_json_wrapper_end(r, wb, format, options, 0);
+        break;
+
+    case DATASOURCE_DATATABLE_JSON:
+        wb->contenttype = CT_APPLICATION_JSON;
+
+        if(options & RRDR_OPTION_JSON_WRAP)
+            rrdr_json_wrapper_begin(r, wb, format, options, 0);
+
+        rrdr2json(r, wb, options, 1);
+
+        if(options & RRDR_OPTION_JSON_WRAP)
+            rrdr_json_wrapper_end(r, wb, format, options, 0);
+        break;
+
+    case DATASOURCE_JSONP:
+        wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
+        if(options & RRDR_OPTION_JSON_WRAP)
+            rrdr_json_wrapper_begin(r, wb, format, options, 0);
+
+        rrdr2json(r, wb, options, 0);
+
+        if(options & RRDR_OPTION_JSON_WRAP)
+            rrdr_json_wrapper_end(r, wb, format, options, 0);
+        break;
+
+    case DATASOURCE_JSON:
+    default:
+        wb->contenttype = CT_APPLICATION_JSON;
+
+        if(options & RRDR_OPTION_JSON_WRAP)
+            rrdr_json_wrapper_begin(r, wb, format, options, 0);
+
+        rrdr2json(r, wb, options, 0);
+
+        if(options & RRDR_OPTION_JSON_WRAP)
+            rrdr_json_wrapper_end(r, wb, format, options, 0);
+        break;
+    }
+
+    rrdr_free(r);
+    return 200;
+}
diff --git a/web/api/formatters/rrd2json.h b/web/api/formatters/rrd2json.h
new file mode 100644
index 000000000..bac6130de
--- /dev/null
+++ b/web/api/formatters/rrd2json.h
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_RRD2JSON_H
+#define NETDATA_RRD2JSON_H 1
+
+#include "web/api/web_api_v1.h"
+#include "web/api/exporters/allmetrics.h"
+#include "web/api/queries/rrdr.h"
+
+#include "web/api/formatters/csv/csv.h"
+#include "web/api/formatters/ssv/ssv.h"
+#include "web/api/formatters/json/json.h"
+#include "web/api/formatters/value/value.h"
+
+#include "web/api/formatters/rrdset2json.h"
+#include "web/api/formatters/charts2json.h"
+#include "web/api/formatters/json_wrapper.h"
+
+#define HOSTNAME_MAX 1024
+
+#define API_RELATIVE_TIME_MAX (3 * 365 * 86400)
+
+// type of JSON generations
+#define DATASOURCE_INVALID (-1)
+#define DATASOURCE_JSON 0
+#define DATASOURCE_DATATABLE_JSON 1
+#define DATASOURCE_DATATABLE_JSONP 2
+#define DATASOURCE_SSV 3
+#define DATASOURCE_CSV 4
+#define DATASOURCE_JSONP 5
+#define DATASOURCE_TSV 6
+#define DATASOURCE_HTML 7
+#define DATASOURCE_JS_ARRAY 8
+#define DATASOURCE_SSV_COMMA 9
+#define DATASOURCE_CSV_JSON_ARRAY 10
+#define DATASOURCE_CSV_MARKDOWN 11
+
+#define DATASOURCE_FORMAT_JSON "json"
+#define DATASOURCE_FORMAT_DATATABLE_JSON "datatable"
+#define DATASOURCE_FORMAT_DATATABLE_JSONP "datasource"
+#define DATASOURCE_FORMAT_JSONP "jsonp"
+#define DATASOURCE_FORMAT_SSV "ssv"
+#define DATASOURCE_FORMAT_CSV "csv"
+#define DATASOURCE_FORMAT_TSV "tsv"
+#define DATASOURCE_FORMAT_HTML "html"
+#define DATASOURCE_FORMAT_JS_ARRAY "array"
+#define DATASOURCE_FORMAT_SSV_COMMA "ssvcomma"
+#define DATASOURCE_FORMAT_CSV_JSON_ARRAY "csvjsonarray"
+#define DATASOURCE_FORMAT_CSV_MARKDOWN "markdown"
+
+extern void rrd_stats_api_v1_chart(RRDSET *st, BUFFER *wb);
+extern void rrdr_buffer_print_format(BUFFER *wb, uint32_t format);
+
+extern int rrdset2anything_api_v1(
+          RRDSET *st
+        , BUFFER *wb
+        , BUFFER *dimensions
+        , uint32_t format
+        , long points
+        , long long after
+        , long long before
+        , int group_method
+        , long group_time
+        , uint32_t options
+        , time_t *latest_timestamp
+);
+
+extern int rrdset2value_api_v1(
+          RRDSET *st
+        , BUFFER *wb
+        , calculated_number *n
+        , const char *dimensions
+        , long points
+        , long long after
+        , long long before
+        , int group_method
+        , long group_time
+        , uint32_t options
+        , time_t *db_after
+        , time_t *db_before
+        , int *value_is_null
+);
+
+#endif /* NETDATA_RRD2JSON_H */
diff --git a/web/api/formatters/rrdset2json.c b/web/api/formatters/rrdset2json.c
new file mode 100644
index 000000000..6d57e34cf
--- /dev/null
+++ b/web/api/formatters/rrdset2json.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "rrdset2json.h"
+
+// generate JSON for the /api/v1/chart API call
+
+void rrdset2json(RRDSET *st, BUFFER *wb, size_t *dimensions_count, size_t *memory_used) {
+    rrdset_rdlock(st);
+
+    buffer_sprintf(wb,
+            "\t\t{\n"
+            "\t\t\t\"id\": \"%s\",\n"
+            "\t\t\t\"name\": \"%s\",\n"
+            "\t\t\t\"type\": \"%s\",\n"
+            "\t\t\t\"family\": \"%s\",\n"
+            "\t\t\t\"context\": \"%s\",\n"
+            "\t\t\t\"title\": \"%s (%s)\",\n"
+            "\t\t\t\"priority\": %ld,\n"
+            "\t\t\t\"plugin\": \"%s\",\n"
+            "\t\t\t\"module\": \"%s\",\n"
+            "\t\t\t\"enabled\": %s,\n"
+            "\t\t\t\"units\": \"%s\",\n"
+            "\t\t\t\"data_url\": \"/api/v1/data?chart=%s\",\n"
+            "\t\t\t\"chart_type\": \"%s\",\n"
+            "\t\t\t\"duration\": %ld,\n"
+            "\t\t\t\"first_entry\": %ld,\n"
+            "\t\t\t\"last_entry\": %ld,\n"
+            "\t\t\t\"update_every\": %d,\n"
+            "\t\t\t\"dimensions\": {\n"
+                   , st->id
+                   , st->name
+                   , st->type
+                   , st->family
+                   , st->context
+                   , st->title, st->name
+                   , st->priority
+                   , st->plugin_name?st->plugin_name:""
+                   , st->module_name?st->module_name:""
+                   , rrdset_flag_check(st, RRDSET_FLAG_ENABLED)?"true":"false"
+                   , st->units
+                   , st->name
+                   , rrdset_type_name(st->chart_type)
+                   , st->entries * st->update_every
+                   , rrdset_first_entry_t(st)
+                   , rrdset_last_entry_t(st)
+                   , st->update_every
+    );
+
+    unsigned long memory = st->memsize;
+
+    size_t dimensions = 0;
+    RRDDIM *rd;
+    rrddim_foreach_read(rd, st) {
+        if(rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)) continue;
+
+        memory += rd->memsize;
+
+        buffer_sprintf(
+                wb
+                , "%s"
+                  "\t\t\t\t\"%s\": { \"name\": \"%s\" }"
+                , dimensions ? ",\n" : ""
+                , rd->id
+                , rd->name
+        );
+
+        dimensions++;
+    }
+
+    if(dimensions_count) *dimensions_count += dimensions;
+    if(memory_used) *memory_used += memory;
+
+    buffer_strcat(wb, "\n\t\t\t},\n\t\t\t\"green\": ");
+    buffer_rrd_value(wb, st->green);
+    buffer_strcat(wb, ",\n\t\t\t\"red\": ");
+    buffer_rrd_value(wb, st->red);
+
+    buffer_strcat(wb, ",\n\t\t\t\"alarms\": {\n");
+    size_t alarms = 0;
+    RRDCALC *rc;
+    for(rc = st->alarms; rc ; rc = rc->rrdset_next) {
+
+        buffer_sprintf(
+                wb
+                , "%s"
+                  "\t\t\t\t\"%s\": {\n"
+                  "\t\t\t\t\t\"id\": %u,\n"
+                  "\t\t\t\t\t\"status\": \"%s\",\n"
+                  "\t\t\t\t\t\"units\": \"%s\",\n"
+                  "\t\t\t\t\t\"update_every\": %d\n"
+                  "\t\t\t\t}"
+                , (alarms) ? ",\n" : ""
+                , rc->name
+                , rc->id
+                , rrdcalc_status2string(rc->status)
+                , rc->units
+                , rc->update_every
+        );
+
+        alarms++;
+    }
+
+    buffer_sprintf(wb,
+            "\n\t\t\t}\n\t\t}"
+    );
+
+    rrdset_unlock(st);
+}
diff --git a/web/api/formatters/rrdset2json.h b/web/api/formatters/rrdset2json.h
new file mode 100644
index 000000000..b2669ec0a
--- /dev/null
+++ b/web/api/formatters/rrdset2json.h
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_API_FORMATTER_RRDSET2JSON_H
+#define NETDATA_API_FORMATTER_RRDSET2JSON_H
+
+#include "rrd2json.h"
+
+extern void rrdset2json(RRDSET *st, BUFFER *wb, size_t *dimensions_count, size_t *memory_used);
+
+#endif //NETDATA_API_FORMATTER_RRDSET2JSON_H
diff --git a/web/api/formatters/ssv/Makefile.am b/web/api/formatters/ssv/Makefile.am
new file mode 100644
index 000000000..19554bed8
--- /dev/null
+++ b/web/api/formatters/ssv/Makefile.am
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+AUTOMAKE_OPTIONS = subdir-objects
+MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
+
+dist_noinst_DATA = \
+	README.md \
+	$(NULL)
diff --git a/web/api/formatters/ssv/Makefile.in b/web/api/formatters/ssv/Makefile.in
new file mode 100644
index 000000000..c7c8c3fa9
--- /dev/null
+++ b/web/api/formatters/ssv/Makefile.in
@@ -0,0 +1,464 @@
+# Makefile.in generated by automake 1.14.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+VPATH = @srcdir@
+am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)'
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
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diff --git a/web/api/formatters/ssv/README.md b/web/api/formatters/ssv/README.md
new file mode 100644
index 000000000..74f0d3189
--- /dev/null
+++ b/web/api/formatters/ssv/README.md
@@ -0,0 +1,52 @@
+# SSV formatter
+
+The SSV formatter sums all dimensions in [results of database queries](../../queries)
+to a single value and returns a list of such values showing how it changes through time.
+
+It supports the following formats:
+
+format|content type|description
+:---:|:---:|:-----
+`ssv`|text/plain|a space separated list of values
+`ssvcomma`|text/plain|a comma separated list of values
+`array`|application/json|a JSON array
+
+The CSV formatter respects the following API `&options=`:
+
+option|supported|description
+:---:|:---:|:---
+`nonzero`|yes|to return only the dimensions that have at least a non-zero value
+`flip`|yes|to return the numbers older to newer (the default is newer to older)
+`percent`|yes|to replace all values with their percentage over the row total
+`abs`|yes|to turn all values positive, before using them
+`min2max`|yes|to return the delta from the minimum value to the maximum value (across dimensions)
+
+## Examples
+
+Get the average system CPU utilization of the last hour, in 6 values (one every 10 minutes):
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=system.cpu&format=ssv&after=-3600&points=6&group=average'
+1.741352 1.6800467 1.769411 1.6761112 1.629862 1.6807968
+```
+
+---
+
+Get the total mysql bandwidth (in + out) for the last hour, in 6 values (one every 10 minutes):
+
+Netdata returns bandwidth in `kilobits`.
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=mysql_local.net&format=ssvcomma&after=-3600&points=6&group=sum&options=abs'
+72618.7936215,72618.778889,72618.788084,72618.9195918,72618.7760612,72618.6712421
+```
+
+---
+
+Get the web server max connections for the last hour, in 12 values (one every 5 minutes)
+in a JSON array:
+
+```bash
+# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=nginx_local.connections&format=array&after=-3600&points=12&group=max'
+[278,258,268,239,259,260,243,266,278,318,264,258]
+```
diff --git a/web/api/formatters/ssv/ssv.c b/web/api/formatters/ssv/ssv.c
new file mode 100644
index 000000000..eeba0283d
--- /dev/null
+++ b/web/api/formatters/ssv/ssv.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "ssv.h"
+
+void rrdr2ssv(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, const char *prefix, const char *separator, const char *suffix) {
+    //info("RRD2SSV(): %s: BEGIN", r->st->id);
+    long i;
+
+    buffer_strcat(wb, prefix);
+    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
+    for(i = start; i != end ;i += step) {
+        int all_values_are_null = 0;
+        calculated_number v = rrdr2value(r, i, options, &all_values_are_null);
+
+        if(likely(i != start)) {
+            if(r->min > v) r->min = v;
+            if(r->max < v) r->max = v;
+        }
+        else {
+            r->min = v;
+            r->max = v;
+        }
+
+        if(likely(i != start))
+            buffer_strcat(wb, separator);
+
+        if(all_values_are_null) {
+            if(options & RRDR_OPTION_NULL2ZERO)
+                buffer_strcat(wb, "0");
+            else
+                buffer_strcat(wb, "null");
+        }
+        else
+            buffer_rrd_value(wb, v);
+    }
+    buffer_strcat(wb, suffix);
+    //info("RRD2SSV(): %s: END", r->st->id);
+}
diff --git a/web/api/formatters/ssv/ssv.h b/web/api/formatters/ssv/ssv.h
new file mode 100644
index 000000000..6963dcf6e
--- /dev/null
+++ b/web/api/formatters/ssv/ssv.h
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_API_FORMATTER_SSV_H
+#define NETDATA_API_FORMATTER_SSV_H
+
+#include "../rrd2json.h"
+
+extern void rrdr2ssv(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, const char *prefix, const char *separator, const char *suffix);
+
+#endif //NETDATA_API_FORMATTER_SSV_H
diff --git a/web/api/formatters/value/Makefile.am b/web/api/formatters/value/Makefile.am
new file mode 100644
index 000000000..19554bed8
--- /dev/null
+++ b/web/api/formatters/value/Makefile.am
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+AUTOMAKE_OPTIONS = subdir-objects
+MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
+
+dist_noinst_DATA = \
+	README.md \
+	$(NULL)
diff --git a/web/api/formatters/value/Makefile.in b/web/api/formatters/value/Makefile.in
new file mode 100644
index 000000000..eb0b2bddf
--- /dev/null
+++ b/web/api/formatters/value/Makefile.in
@@ -0,0 +1,464 @@
+# Makefile.in generated by automake 1.14.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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diff --git a/web/api/formatters/value/README.md b/web/api/formatters/value/README.md
new file mode 100644
index 000000000..5024e74ee
--- /dev/null
+++ b/web/api/formatters/value/README.md
@@ -0,0 +1,17 @@
+# Value formatter
+
+The Value formatter presents [results of database queries](../../queries) as a single value.
+
+To calculate the single value to be returned, it sums the values of all dimensions.
+
+The Value formatter respects the following API `&options=`:
+
+option|supported|description
+:---:|:---:|:---
+`percent`|yes|to replace all values with their percentage over the row total
+`abs`|yes|to turn all values positive, before using them
+`min2max`|yes|to return the delta from the minimum value to the maximum value (across dimensions)
+
+The Value formatter is not exposed by the API by itself.
+Instead it is used by the [`ssv`](../ssv) formatter
+and [health monitoring queries](../../../../health).
diff --git a/web/api/formatters/value/value.c b/web/api/formatters/value/value.c
new file mode 100644
index 000000000..aea6c162b
--- /dev/null
+++ b/web/api/formatters/value/value.c
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "value.h"
+
+
+inline calculated_number rrdr2value(RRDR *r, long i, RRDR_OPTIONS options, int *all_values_are_null) {
+    rrdset_check_rdlock(r->st);
+
+    long c;
+    RRDDIM *d;
+
+    calculated_number *cn = &r->v[ i * r->d ];
+    RRDR_VALUE_FLAGS *co = &r->o[ i * r->d ];
+
+    calculated_number sum = 0, min = 0, max = 0, v;
+    int all_null = 1, init = 1;
+
+    calculated_number total = 1;
+    int set_min_max = 0;
+    if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
+        total = 0;
+        for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->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, d = r->st->dimensions; d && c < r->d ;c++, d = d->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];
+
+        if(likely((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;
+        }
+
+        if(unlikely(init)) {
+            if(n > 0) {
+                min = 0;
+                max = n;
+            }
+            else {
+                min = n;
+                max = 0;
+            }
+            init = 0;
+        }
+
+        if(likely(!(co[c] & RRDR_VALUE_EMPTY))) {
+            all_null = 0;
+            sum += n;
+        }
+
+        if(n < min) min = n;
+        if(n > max) max = n;
+    }
+
+    if(unlikely(all_null)) {
+        if(likely(all_values_are_null))
+            *all_values_are_null = 1;
+        return 0;
+    }
+    else {
+        if(likely(all_values_are_null))
+            *all_values_are_null = 0;
+    }
+
+    if(options & RRDR_OPTION_MIN2MAX)
+        v = max - min;
+    else
+        v = sum;
+
+    return v;
+}
diff --git a/web/api/formatters/value/value.h b/web/api/formatters/value/value.h
new file mode 100644
index 000000000..d9e981f88
--- /dev/null
+++ b/web/api/formatters/value/value.h
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_API_FORMATTER_VALUE_H
+#define NETDATA_API_FORMATTER_VALUE_H
+
+#include "../rrd2json.h"
+
+extern calculated_number rrdr2value(RRDR *r, long i, RRDR_OPTIONS options, int *all_values_are_null);
+
+#endif //NETDATA_API_FORMATTER_VALUE_H