| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package squid |
| 4 | |
| 5 | import ( |
| 6 | "bufio" |
| 7 | "fmt" |
| 8 | "io" |
| 9 | "strconv" |
| 10 | "strings" |
| 11 | |
| 12 | "github.com/netdata/netdata/go/plugins/pkg/web" |
| 13 | ) |
| 14 | |
| 15 | const ( |
| 16 | // https://wiki.squid-cache.org/Features/CacheManager/Index#controlling-access-to-the-cache-manager |
| 17 | urlPathServerStats = "/squid-internal-mgr/counters" |
| 18 | ) |
| 19 | |
| 20 | var statsCounters = map[string]bool{ |
| 21 | "client_http.kbytes_in": true, |
| 22 | "client_http.kbytes_out": true, |
| 23 | "server.all.errors": true, |
| 24 | "server.all.requests": true, |
| 25 | "server.all.kbytes_out": true, |
| 26 | "server.all.kbytes_in": true, |
| 27 | "client_http.errors": true, |
| 28 | "client_http.hits": true, |
| 29 | "client_http.requests": true, |
| 30 | "client_http.hit_kbytes_out": true, |
| 31 | } |
| 32 | |
| 33 | func (c *Collector) collect() (map[string]int64, error) { |
| 34 | mx := make(map[string]int64) |
| 35 | |
| 36 | if err := c.collectCounters(mx); err != nil { |
| 37 | return nil, err |
| 38 | } |
| 39 | |
| 40 | return mx, nil |
| 41 | } |
| 42 | |
| 43 | func (c *Collector) collectCounters(mx map[string]int64) error { |
| 44 | req, err := web.NewHTTPRequestWithPath(c.RequestConfig, urlPathServerStats) |
| 45 | if err != nil { |
| 46 | return fmt.Errorf("failed to create '%s' request: %w", urlPathServerStats, err) |
| 47 | } |
| 48 | |
| 49 | return web.DoHTTP(c.httpClient).Request(req, func(body io.Reader) error { |
| 50 | sc := bufio.NewScanner(body) |
| 51 | |
| 52 | for sc.Scan() { |
| 53 | key, value, ok := strings.Cut(sc.Text(), "=") |
| 54 | if !ok { |
| 55 | continue |
| 56 | } |
| 57 | |
| 58 | key, value = strings.TrimSpace(key), strings.TrimSpace(value) |
| 59 | |
| 60 | if !statsCounters[key] { |
| 61 | continue |
| 62 | } |
| 63 | |
| 64 | v, err := strconv.ParseInt(value, 10, 64) |
| 65 | if err != nil { |
| 66 | c.Debugf("failed to parse key %s value %s: %v", key, value, err) |
| 67 | continue |
| 68 | } |
| 69 | |
| 70 | mx[key] = v |
| 71 | } |
| 72 | |
| 73 | if len(mx) == 0 { |
| 74 | return fmt.Errorf("unexpected response from '%s': no metrics found", req.URL) |
| 75 | } |
| 76 | return nil |
| 77 | }) |
| 78 | } |