| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package tor |
| 4 | |
| 5 | import ( |
| 6 | "bufio" |
| 7 | "bytes" |
| 8 | "context" |
| 9 | "fmt" |
| 10 | "strconv" |
| 11 | "strings" |
| 12 | ) |
| 13 | |
| 14 | func (c *Collector) collect() (map[string]int64, error) { |
| 15 | if c.conn == nil { |
| 16 | conn, err := c.establishConnection() |
| 17 | if err != nil { |
| 18 | return nil, err |
| 19 | } |
| 20 | c.conn = conn |
| 21 | } |
| 22 | |
| 23 | mx := make(map[string]int64) |
| 24 | if err := c.collectServerInfo(mx); err != nil { |
| 25 | c.Cleanup(context.Background()) |
| 26 | return nil, err |
| 27 | } |
| 28 | |
| 29 | return mx, nil |
| 30 | } |
| 31 | |
| 32 | func (c *Collector) collectServerInfo(mx map[string]int64) error { |
| 33 | resp, err := c.conn.getInfo("traffic/read", "traffic/written", "uptime") |
| 34 | if err != nil { |
| 35 | return err |
| 36 | } |
| 37 | |
| 38 | sc := bufio.NewScanner(bytes.NewReader(resp)) |
| 39 | |
| 40 | for sc.Scan() { |
| 41 | line := sc.Text() |
| 42 | |
| 43 | key, value, ok := strings.Cut(line, "=") |
| 44 | if !ok { |
| 45 | return fmt.Errorf("failed to parse metric: %s", line) |
| 46 | } |
| 47 | |
| 48 | v, err := strconv.ParseInt(value, 10, 64) |
| 49 | if err != nil { |
| 50 | return fmt.Errorf("failed to parse metric %s value: %v", line, err) |
| 51 | } |
| 52 | mx[key] = v |
| 53 | } |
| 54 | |
| 55 | return nil |
| 56 | } |
| 57 | |
| 58 | func (c *Collector) establishConnection() (controlConn, error) { |
| 59 | conn := c.newConn(c.Config) |
| 60 | |
| 61 | if err := conn.connect(); err != nil { |
| 62 | return nil, err |
| 63 | } |
| 64 | |
| 65 | return conn, nil |
| 66 | } |