cloudflare/cloudflared
Publicmirrored from https://github.com/cloudflare/cloudflaredAvailable
origin/cloudflare_status_page.go
117lines · modecode
| 1 | package origin |
| 2 | |
| 3 | import ( |
| 4 | "encoding/json" |
| 5 | "io/ioutil" |
| 6 | "net/http" |
| 7 | "strings" |
| 8 | "time" |
| 9 | |
| 10 | "github.com/cloudflare/golibs/lrucache" |
| 11 | ) |
| 12 | |
| 13 | // StatusPage.io API docs: |
| 14 | // https://www.cloudflarestatus.com/api/v2/#incidents-unresolved |
| 15 | const ( |
| 16 | activeIncidentsURL = "https://yh6f0r4529hb.statuspage.io/api/v2/incidents/unresolved.json" |
| 17 | argoTunnelKeyword = "argo tunnel" |
| 18 | incidentDetailsPrefix = "https://www.cloudflarestatus.com/incidents/" |
| 19 | ) |
| 20 | |
| 21 | // IncidentLookup is an object that checks for active incidents in |
| 22 | // the Cloudflare infrastructure. |
| 23 | type IncidentLookup interface { |
| 24 | ActiveIncidents() []Incident |
| 25 | } |
| 26 | |
| 27 | // NewIncidentLookup returns a new IncidentLookup instance that caches its |
| 28 | // results with a 1-minute TTL. |
| 29 | func NewIncidentLookup() IncidentLookup { |
| 30 | return newCachedIncidentLookup(fetchActiveIncidents) |
| 31 | } |
| 32 | |
| 33 | type IncidentUpdate struct { |
| 34 | Body string |
| 35 | } |
| 36 | |
| 37 | type Incident struct { |
| 38 | Name string |
| 39 | ID string `json:"id"` |
| 40 | Updates []IncidentUpdate `json:"incident_updates"` |
| 41 | } |
| 42 | |
| 43 | type StatusPage struct { |
| 44 | Incidents []Incident |
| 45 | } |
| 46 | |
| 47 | func (i Incident) URL() string { |
| 48 | return incidentDetailsPrefix + i.ID |
| 49 | } |
| 50 | |
| 51 | func parseStatusPage(data []byte) (*StatusPage, error) { |
| 52 | var result StatusPage |
| 53 | err := json.Unmarshal(data, &result) |
| 54 | return &result, err |
| 55 | } |
| 56 | |
| 57 | func isArgoTunnelIncident(i Incident) bool { |
| 58 | if strings.Contains(strings.ToLower(i.Name), argoTunnelKeyword) { |
| 59 | return true |
| 60 | } |
| 61 | for _, u := range i.Updates { |
| 62 | if strings.Contains(strings.ToLower(u.Body), argoTunnelKeyword) { |
| 63 | return true |
| 64 | } |
| 65 | } |
| 66 | return false |
| 67 | } |
| 68 | |
| 69 | func fetchActiveIncidents() (incidents []Incident) { |
| 70 | resp, err := http.Get(activeIncidentsURL) |
| 71 | if err != nil { |
| 72 | return |
| 73 | } |
| 74 | defer resp.Body.Close() |
| 75 | body, err := ioutil.ReadAll(resp.Body) |
| 76 | if err != nil { |
| 77 | return |
| 78 | } |
| 79 | statusPage, err := parseStatusPage(body) |
| 80 | if err != nil { |
| 81 | return |
| 82 | } |
| 83 | for _, i := range statusPage.Incidents { |
| 84 | if isArgoTunnelIncident(i) { |
| 85 | incidents = append(incidents, i) |
| 86 | } |
| 87 | } |
| 88 | return incidents |
| 89 | } |
| 90 | |
| 91 | type cachedIncidentLookup struct { |
| 92 | cache *lrucache.LRUCache |
| 93 | ttl time.Duration |
| 94 | uncachedLookup func() []Incident |
| 95 | } |
| 96 | |
| 97 | func newCachedIncidentLookup(uncachedLookup func() []Incident) *cachedIncidentLookup { |
| 98 | return &cachedIncidentLookup{ |
| 99 | cache: lrucache.NewLRUCache(1), |
| 100 | ttl: time.Minute, |
| 101 | uncachedLookup: uncachedLookup, |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | // We only need one cache entry. Always use the empty string as its key. |
| 106 | const cacheKey = "" |
| 107 | |
| 108 | func (c *cachedIncidentLookup) ActiveIncidents() []Incident { |
| 109 | if cached, ok := c.cache.GetNotStale(cacheKey); ok { |
| 110 | if incidents, ok := cached.([]Incident); ok { |
| 111 | return incidents |
| 112 | } |
| 113 | } |
| 114 | incidents := c.uncachedLookup() |
| 115 | c.cache.Set(cacheKey, incidents, time.Now().Add(c.ttl)) |
| 116 | return incidents |
| 117 | } |
| 118 | |