| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package spigotmc |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | "errors" |
| 8 | "fmt" |
| 9 | "regexp" |
| 10 | "strconv" |
| 11 | "strings" |
| 12 | ) |
| 13 | |
| 14 | const precision = 100 |
| 15 | |
| 16 | var ( |
| 17 | reTPS = regexp.MustCompile(`(?ms)(?P<tps_1min>\d+.\d+),.*?(?P<tps_5min>\d+.\d+),.*?(?P<tps_15min>\d+.\d+).*?$.*?(?P<mem_used>\d+)/(?P<mem_alloc>\d+)[^:]+:\s*(?P<mem_max>\d+)`) |
| 18 | reList = regexp.MustCompile(`(?P<players>\d+)/?(?P<hidden_players>\d+)?.*?(?P<total_players>\d+)`) |
| 19 | reCleanResp = regexp.MustCompile(`§.`) |
| 20 | ) |
| 21 | |
| 22 | func (c *Collector) collect() (map[string]int64, error) { |
| 23 | if c.conn == nil { |
| 24 | conn, err := c.establishConn() |
| 25 | if err != nil { |
| 26 | return nil, err |
| 27 | } |
| 28 | c.conn = conn |
| 29 | } |
| 30 | |
| 31 | mx := make(map[string]int64) |
| 32 | |
| 33 | if err := c.collectTPS(mx); err != nil { |
| 34 | c.Cleanup(context.Background()) |
| 35 | return nil, fmt.Errorf("failed to collect '%s': %v", cmdTPS, err) |
| 36 | } |
| 37 | if err := c.collectList(mx); err != nil { |
| 38 | c.Cleanup(context.Background()) |
| 39 | return nil, fmt.Errorf("failed to collect '%s': %v", cmdList, err) |
| 40 | } |
| 41 | |
| 42 | return mx, nil |
| 43 | } |
| 44 | |
| 45 | func (c *Collector) collectTPS(mx map[string]int64) error { |
| 46 | resp, err := c.conn.queryTps() |
| 47 | if err != nil { |
| 48 | return err |
| 49 | } |
| 50 | |
| 51 | c.Debugf("cmd '%s' response: %s", cmdTPS, resp) |
| 52 | |
| 53 | if err := parseResponse(resp, reTPS, func(s string, f float64) { |
| 54 | switch { |
| 55 | case strings.HasPrefix(s, "tps"): |
| 56 | f *= precision |
| 57 | case strings.HasPrefix(s, "mem"): |
| 58 | f *= 1024 * 1024 // mb to bytes |
| 59 | } |
| 60 | mx[s] = int64(f) |
| 61 | }); err != nil { |
| 62 | return err |
| 63 | } |
| 64 | |
| 65 | return nil |
| 66 | } |
| 67 | |
| 68 | func (c *Collector) collectList(mx map[string]int64) error { |
| 69 | resp, err := c.conn.queryList() |
| 70 | if err != nil { |
| 71 | return err |
| 72 | } |
| 73 | c.Debugf("cmd '%s' response: %s", cmdList, resp) |
| 74 | |
| 75 | var players int64 |
| 76 | if err := parseResponse(resp, reList, func(s string, f float64) { |
| 77 | switch s { |
| 78 | case "players", "hidden_players": |
| 79 | players += int64(f) |
| 80 | } |
| 81 | }); err != nil { |
| 82 | return err |
| 83 | } |
| 84 | |
| 85 | mx["players"] = players |
| 86 | |
| 87 | return nil |
| 88 | } |
| 89 | |
| 90 | func parseResponse(resp string, re *regexp.Regexp, fn func(string, float64)) error { |
| 91 | if resp == "" { |
| 92 | return errors.New("empty response") |
| 93 | } |
| 94 | |
| 95 | resp = reCleanResp.ReplaceAllString(resp, "") |
| 96 | |
| 97 | matches := re.FindStringSubmatch(resp) |
| 98 | if len(matches) == 0 { |
| 99 | return errors.New("regexp does not match") |
| 100 | } |
| 101 | |
| 102 | for i, name := range re.SubexpNames() { |
| 103 | if name == "" || len(matches) <= i || matches[i] == "" { |
| 104 | continue |
| 105 | } |
| 106 | val := matches[i] |
| 107 | |
| 108 | v, err := strconv.ParseFloat(val, 64) |
| 109 | if err != nil { |
| 110 | return fmt.Errorf("failed to parse key '%s' value '%s': %v", name, val, err) |
| 111 | } |
| 112 | |
| 113 | fn(name, v) |
| 114 | } |
| 115 | |
| 116 | return nil |
| 117 | } |
| 118 | |
| 119 | func (c *Collector) establishConn() (rconConn, error) { |
| 120 | conn := c.newConn(c.Config) |
| 121 | |
| 122 | if err := conn.connect(); err != nil { |
| 123 | return nil, err |
| 124 | } |
| 125 | |
| 126 | return conn, nil |
| 127 | } |