mirror of
https://github.com/TwiN/gatus.git
synced 2024-11-22 16:03:44 +01:00
97 lines
3.0 KiB
Go
97 lines
3.0 KiB
Go
package ntfy
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"strconv"
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"github.com/TwiN/gatus/v5/alerting/alert"
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"github.com/TwiN/gatus/v5/client"
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"github.com/TwiN/gatus/v5/core"
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)
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const (
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DefaultURL = "https://ntfy.sh"
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DefaultPriority = 3
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)
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// AlertProvider is the configuration necessary for sending an alert using Slack
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type AlertProvider struct {
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Topic string `yaml:"topic"`
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URL string `yaml:"url,omitempty"` // Defaults to DefaultURL
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Priority int `yaml:"priority,omitempty"` // Defaults to DefaultPriority
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// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
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DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
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}
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// IsValid returns whether the provider's configuration is valid
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func (provider *AlertProvider) IsValid() bool {
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if len(provider.URL) == 0 {
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provider.URL = DefaultURL
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}
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if provider.Priority == 0 {
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provider.Priority = DefaultPriority
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}
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return len(provider.URL) > 0 && len(provider.Topic) > 0 && provider.Priority > 0 && provider.Priority < 6
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}
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// Send an alert using the provider
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func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
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buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
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request, err := http.NewRequest(http.MethodPost, provider.URL, buffer)
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if err != nil {
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return err
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}
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request.Header.Set("Content-Type", "application/json")
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response, err := client.GetHTTPClient(nil).Do(request)
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if err != nil {
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return err
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}
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defer response.Body.Close()
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if response.StatusCode > 399 {
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body, _ := io.ReadAll(response.Body)
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return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
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}
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return err
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}
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type Body struct {
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Topic string `json:"topic"`
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Title string `json:"title"`
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Message string `json:"message"`
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Tags []string `json:"tags"`
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Priority int `json:"priority"`
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}
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// buildRequestBody builds the request body for the provider
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func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
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var message, tag string
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if resolved {
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tag = "white_check_mark"
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message = "An alert has been resolved after passing successfully " + strconv.Itoa(alert.SuccessThreshold) + " time(s) in a row"
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} else {
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tag = "x"
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message = "An alert has been triggered due to having failed " + strconv.Itoa(alert.FailureThreshold) + " time(s) in a row"
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}
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if len(alert.GetDescription()) > 0 {
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message += " with the following description: " + alert.GetDescription()
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}
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body, _ := json.Marshal(Body{
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Topic: provider.Topic,
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Title: "Gatus: " + endpoint.DisplayName(),
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Message: message,
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Tags: []string{tag},
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Priority: provider.Priority,
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})
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return body
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}
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// GetDefaultAlert returns the provider's default alert configuration
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func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
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return provider.DefaultAlert
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}
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