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// 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()
}
}
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