1 files changed, 96 insertions, 0 deletions
diff --git a/src/go/plugin/go.d/modules/clickhouse/collect.go b/src/go/plugin/go.d/modules/clickhouse/collect.go
new file mode 100644
index 000000000..8bb756528
--- /dev/null
+++ b/src/go/plugin/go.d/modules/clickhouse/collect.go
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package clickhouse
+
+import (
+	"encoding/csv"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"slices"
+)
+
+const precision = 1000
+
+func (c *ClickHouse) collect() (map[string]int64, error) {
+	mx := make(map[string]int64)
+
+	if err := c.collectSystemEvents(mx); err != nil {
+		return nil, err
+	}
+	if err := c.collectSystemMetrics(mx); err != nil {
+		return nil, err
+	}
+	if err := c.collectSystemAsyncMetrics(mx); err != nil {
+		return nil, err
+	}
+	if err := c.collectSystemParts(mx); err != nil {
+		return nil, err
+	}
+	if err := c.collectSystemDisks(mx); err != nil {
+		return nil, err
+	}
+	if err := c.collectLongestRunningQueryTime(mx); err != nil {
+		return nil, err
+	}
+
+	return mx, nil
+}
+
+func (c *ClickHouse) doOKDecodeCSV(req *http.Request, assign func(column, value string, lineEnd bool)) error {
+	resp, err := c.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)
+	}
+
+	return readCSVResponseData(resp.Body, assign)
+}
+
+func readCSVResponseData(reader io.Reader, assign func(column, value string, lineEnd bool)) error {
+	r := csv.NewReader(reader)
+	r.ReuseRecord = true
+
+	var columns []string
+
+	for {
+		record, err := r.Read()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			return err
+		}
+
+		if len(columns) == 0 {
+			columns = slices.Clone(record)
+			continue
+		}
+
+		if len(columns) != len(record) {
+			return fmt.Errorf("column count mismatch: %d vs %d", len(columns), len(record))
+		}
+
+		for i, l := 0, len(record); i < l; i++ {
+			assign(columns[i], record[i], i == l-1)
+		}
+	}
+
+	return nil
+}
+
+func makeURLQuery(q string) string {
+	return url.Values{"query": {q}}.Encode()
+}
+
+func closeBody(resp *http.Response) {
+	if resp != nil && resp.Body != nil {
+		_, _ = io.Copy(io.Discard, resp.Body)
+		_ = resp.Body.Close()
+	}
+}