1 files changed, 74 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/modules/dnsdist/collect.go b/src/go/collectors/go.d.plugin/modules/dnsdist/collect.go
new file mode 100644
index 000000000..650757479
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/dnsdist/collect.go
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package dnsdist
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+
+	"github.com/netdata/netdata/go/go.d.plugin/pkg/stm"
+	"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
+)
+
+const (
+	urlPathJSONStat = "/jsonstat"
+)
+
+func (d *DNSdist) collect() (map[string]int64, error) {
+	statistics, err := d.scrapeStatistics()
+	if err != nil {
+		return nil, err
+	}
+
+	collected := make(map[string]int64)
+	d.collectStatistic(collected, statistics)
+
+	return collected, nil
+}
+
+func (d *DNSdist) collectStatistic(collected map[string]int64, statistics *statisticMetrics) {
+	for metric, value := range stm.ToMap(statistics) {
+		collected[metric] = value
+	}
+}
+
+func (d *DNSdist) scrapeStatistics() (*statisticMetrics, error) {
+	req, _ := web.NewHTTPRequest(d.Request)
+	req.URL.Path = urlPathJSONStat
+	req.URL.RawQuery = url.Values{"command": []string{"stats"}}.Encode()
+
+	var statistics statisticMetrics
+	if err := d.doOKDecode(req, &statistics); err != nil {
+		return nil, err
+	}
+
+	return &statistics, nil
+}
+
+func (d *DNSdist) doOKDecode(req *http.Request, in interface{}) error {
+	resp, err := d.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("error on HTTP request '%s': %v", req.URL, err)
+	}
+	defer closeBody(resp)
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("'%s' returned HTTP status code: %d", req.URL, resp.StatusCode)
+	}
+
+	if err := json.NewDecoder(resp.Body).Decode(in); err != nil {
+		return fmt.Errorf("error on decoding response from '%s': %v", req.URL, err)
+	}
+
+	return nil
+}
+
+func closeBody(resp *http.Response) {
+	if resp != nil && resp.Body != nil {
+		_, _ = io.Copy(io.Discard, resp.Body)
+		_ = resp.Body.Close()
+	}
+}