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feat: add support of Uptime Kuma (#600)
This reverts the previous removal caused by undertesting.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| package monitor | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "net/http" | ||
| "net/url" | ||
| "slices" | ||
| "time" | ||
|
|
||
| "github.com/google/go-querystring/query" | ||
|
|
||
| "github.com/favonia/cloudflare-ddns/internal/pp" | ||
| ) | ||
|
|
||
| // UptimeKuma provides basic support of Uptime Kuma. | ||
| // | ||
| // - ExitStatus, Start, and Log will be no-op. | ||
| // - Success/Fail will be translated to status=up/down | ||
| // - Messages will be sent along with Success/Fail, | ||
| // but it seems Uptime Kuma will only display the first one. | ||
| // - ping will always be empty | ||
| type UptimeKuma struct { | ||
| // The endpoint | ||
| BaseURL *url.URL | ||
|
|
||
| // Timeout for each ping | ||
| Timeout time.Duration | ||
| } | ||
|
|
||
| const ( | ||
| // UptimeKumaDefaultTimeout is the default timeout for a UptimeKuma ping. | ||
| UptimeKumaDefaultTimeout = 10 * time.Second | ||
| ) | ||
|
|
||
| // NewUptimeKuma creates a new UptimeKuma monitor. | ||
| func NewUptimeKuma(ppfmt pp.PP, rawURL string) (Monitor, bool) { | ||
| u, err := url.Parse(rawURL) | ||
| if err != nil { | ||
| ppfmt.Errorf(pp.EmojiUserError, "Failed to parse the Uptime Kuma URL (redacted)") | ||
| return nil, false | ||
| } | ||
|
|
||
| if !(u.IsAbs() && u.Opaque == "" && u.Host != "") { | ||
| ppfmt.Errorf(pp.EmojiUserError, `The Uptime Kuma URL (redacted) does not look like a valid URL`) | ||
| return nil, false | ||
| } | ||
|
|
||
| switch u.Scheme { | ||
| case "http": | ||
| ppfmt.Warningf(pp.EmojiUserWarning, "The Uptime Kuma URL (redacted) uses HTTP; please consider using HTTPS") | ||
|
|
||
| case "https": | ||
| // HTTPS is good! | ||
|
|
||
| default: | ||
| ppfmt.Errorf(pp.EmojiUserError, `The Uptime Kuma URL (redacted) does not look like a valid URL`) | ||
| return nil, false | ||
| } | ||
|
|
||
| // By default, the URL provided by Uptime Kuma has this: | ||
| // | ||
| // https://some.host.name/api/push/GFWB6vsHMg?status=up&msg=Ok&ping= | ||
| // | ||
| // The following will check the query part | ||
| if u.RawQuery != "" { | ||
| q, err := url.ParseQuery(u.RawQuery) | ||
| if err != nil { | ||
| ppfmt.Errorf(pp.EmojiUserError, `The Uptime Kuma URL (redacted) does not look like a valid URL`) | ||
| return nil, false | ||
| } | ||
|
|
||
| for k, vs := range q { | ||
| switch { | ||
| case k == "status" && slices.Equal(vs, []string{"up"}): // status=up | ||
| case k == "msg" && slices.Equal(vs, []string{"Ok"}): // msg=Ok | ||
| case k == "ping" && slices.Equal(vs, []string{""}): // ping= | ||
|
|
||
| default: // problematic case | ||
| ppfmt.Warningf(pp.EmojiUserError, | ||
| `The Uptime Kuma URL (redacted) contains an unexpected query %s=... and it will not be used`, | ||
| k) | ||
| } | ||
| } | ||
|
|
||
| // Clear all queries to obtain the base URL | ||
| u.RawQuery = "" | ||
| } | ||
|
|
||
| h := &UptimeKuma{ | ||
| BaseURL: u, | ||
| Timeout: UptimeKumaDefaultTimeout, | ||
| } | ||
|
|
||
| return h, true | ||
| } | ||
|
|
||
| // Describe calls the callback with the service name "Uptime Kuma". | ||
| func (h *UptimeKuma) Describe(callback func(service, params string)) { | ||
| callback("Uptime Kuma", "(URL redacted)") | ||
| } | ||
|
|
||
| // UptimeKumaResponse is for parsing the response from Uptime Kuma. | ||
| type UptimeKumaResponse struct { | ||
| Ok bool `json:"ok"` | ||
| Msg string `json:"msg"` | ||
| } | ||
|
|
||
| // UptimeKumaRequest is for assembling the request to Uptime Kuma. | ||
| type UptimeKumaRequest struct { | ||
| Status string `url:"status"` | ||
| Msg string `url:"msg"` | ||
| Ping string `url:"ping"` | ||
| } | ||
|
|
||
| func (h *UptimeKuma) ping(ctx context.Context, ppfmt pp.PP, param UptimeKumaRequest) bool { | ||
| ctx, cancel := context.WithTimeout(ctx, h.Timeout) | ||
| defer cancel() | ||
|
|
||
| url := *h.BaseURL | ||
| v, _ := query.Values(param) | ||
| url.RawQuery = v.Encode() | ||
|
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||
| req, err := http.NewRequestWithContext(ctx, http.MethodGet, url.String(), nil) | ||
| if err != nil { | ||
| ppfmt.Warningf(pp.EmojiImpossible, "Failed to prepare HTTP(S) request to Uptime Kuma: %v", err) | ||
| return false | ||
| } | ||
|
|
||
| resp, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| ppfmt.Warningf(pp.EmojiError, "Failed to send HTTP(S) request to Uptime Kuma: %v", err) | ||
| return false | ||
| } | ||
| defer resp.Body.Close() | ||
|
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||
| var parsedResp UptimeKumaResponse | ||
| if err = json.NewDecoder(resp.Body).Decode(&parsedResp); err != nil { | ||
| ppfmt.Warningf(pp.EmojiError, "Failed to parse the response from Uptime Kuma: %v", err) | ||
| return false | ||
| } | ||
| if !parsedResp.Ok { | ||
| ppfmt.Warningf(pp.EmojiError, "Failed to ping Uptime Kuma: %q", parsedResp.Msg) | ||
| return false | ||
| } | ||
|
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||
| ppfmt.Infof(pp.EmojiNotification, "Successfully pinged Uptime Kuma") | ||
| return true | ||
| } | ||
|
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||
| // Success pings the server with status=up. | ||
| func (h *UptimeKuma) Success(ctx context.Context, ppfmt pp.PP, message string) bool { | ||
| return h.ping(ctx, ppfmt, UptimeKumaRequest{Status: "up", Msg: message, Ping: ""}) | ||
| } | ||
|
|
||
| // Start does nothing. | ||
| func (h *UptimeKuma) Start(ctx context.Context, ppfmt pp.PP, message string) bool { | ||
| return true | ||
| } | ||
|
|
||
| // Failure pings the server with status=down. | ||
| func (h *UptimeKuma) Failure(ctx context.Context, ppfmt pp.PP, message string) bool { | ||
| return h.ping(ctx, ppfmt, UptimeKumaRequest{Status: "down", Msg: message, Ping: ""}) | ||
| } | ||
|
|
||
| // Log does nothing. | ||
| func (h *UptimeKuma) Log(ctx context.Context, ppfmt pp.PP, message string) bool { | ||
| return true | ||
| } | ||
|
|
||
| // ExitStatus does nothing. | ||
| func (h *UptimeKuma) ExitStatus(ctx context.Context, ppfmt pp.PP, code int, message string) bool { | ||
| if code != 0 { | ||
| return h.ping(ctx, ppfmt, UptimeKumaRequest{Status: "down", Msg: message, Ping: ""}) | ||
| } | ||
| return true | ||
| } |
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