| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package clickhouse |
| 4 | |
| 5 | import ( |
| 6 | "encoding/csv" |
| 7 | "fmt" |
| 8 | "io" |
| 9 | "net/http" |
| 10 | "net/url" |
| 11 | "slices" |
| 12 | |
| 13 | "github.com/netdata/netdata/go/plugins/pkg/web" |
| 14 | ) |
| 15 | |
| 16 | const precision = 1000 |
| 17 | |
| 18 | func (c *Collector) collect() (map[string]int64, error) { |
| 19 | mx := make(map[string]int64) |
| 20 | |
| 21 | if err := c.collectSystemEvents(mx); err != nil { |
| 22 | return nil, err |
| 23 | } |
| 24 | if err := c.collectSystemMetrics(mx); err != nil { |
| 25 | return nil, err |
| 26 | } |
| 27 | if err := c.collectSystemAsyncMetrics(mx); err != nil { |
| 28 | return nil, err |
| 29 | } |
| 30 | if err := c.collectSystemParts(mx); err != nil { |
| 31 | return nil, err |
| 32 | } |
| 33 | if err := c.collectSystemDisks(mx); err != nil { |
| 34 | return nil, err |
| 35 | } |
| 36 | if err := c.collectLongestRunningQueryTime(mx); err != nil { |
| 37 | return nil, err |
| 38 | } |
| 39 | |
| 40 | return mx, nil |
| 41 | } |
| 42 | |
| 43 | func (c *Collector) doHTTP(req *http.Request, assign func(column, value string, lineEnd bool)) error { |
| 44 | return web.DoHTTP(c.httpClient).Request(req, func(body io.Reader) error { |
| 45 | return readCSVResponseData(body, assign) |
| 46 | }) |
| 47 | } |
| 48 | |
| 49 | func readCSVResponseData(reader io.Reader, assign func(column, value string, lineEnd bool)) error { |
| 50 | r := csv.NewReader(reader) |
| 51 | r.ReuseRecord = true |
| 52 | |
| 53 | var columns []string |
| 54 | |
| 55 | for { |
| 56 | record, err := r.Read() |
| 57 | if err != nil { |
| 58 | if err == io.EOF { |
| 59 | break |
| 60 | } |
| 61 | return err |
| 62 | } |
| 63 | |
| 64 | if len(columns) == 0 { |
| 65 | columns = slices.Clone(record) |
| 66 | continue |
| 67 | } |
| 68 | |
| 69 | if len(columns) != len(record) { |
| 70 | return fmt.Errorf("column count mismatch: %d vs %d", len(columns), len(record)) |
| 71 | } |
| 72 | |
| 73 | for i, l := 0, len(record); i < l; i++ { |
| 74 | assign(columns[i], record[i], i == l-1) |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return nil |
| 79 | } |
| 80 | |
| 81 | func makeURLQuery(q string) string { |
| 82 | return url.Values{"query": {q}}.Encode() |
| 83 | } |