feat(alerting): Add Google Chat alerting provider (#234)
This commit is contained in:
Kostiantyn Polischuk
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GitHub
GitHub
parent
3a7977d086
commit
51a4b63fb5
124
alerting/provider/googlechat/googlechat.go
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124
alerting/provider/googlechat/googlechat.go
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package googlechat
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import (
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"bytes"
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"fmt"
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"io"
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"net/http"
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"github.com/TwiN/gatus/v3/alerting/alert"
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"github.com/TwiN/gatus/v3/client"
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"github.com/TwiN/gatus/v3/core"
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)
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// AlertProvider is the configuration necessary for sending an alert using Google chat
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type AlertProvider struct {
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WebhookURL string `yaml:"webhook-url"`
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// ClientConfig is the configuration of the client used to communicate with the provider's target
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ClientConfig *client.Config `yaml:"client,omitempty"`
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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 provider.ClientConfig == nil {
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provider.ClientConfig = client.GetDefaultConfig()
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}
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return len(provider.WebhookURL) > 0
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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([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
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request, err := http.NewRequest(http.MethodPost, provider.WebhookURL, 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(provider.ClientConfig).Do(request)
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if err != nil {
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return err
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}
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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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// 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) string {
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var message, color string
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if resolved {
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color = "#36A64F"
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message = fmt.Sprintf("<font color='%s'>An alert has been resolved after passing successfully %d time(s) in a row</font>", color, alert.SuccessThreshold)
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} else {
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color = "#DD0000"
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message = fmt.Sprintf("<font color='%s'>An alert has been triggered due to having failed %d time(s) in a row</font>", color, alert.FailureThreshold)
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}
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var results string
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for _, conditionResult := range result.ConditionResults {
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var prefix string
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if conditionResult.Success {
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prefix = "✅"
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} else {
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prefix = "❌"
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}
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results += fmt.Sprintf("%s %s<br>", prefix, conditionResult.Condition)
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}
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var description string
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if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
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description = ":: " + alertDescription
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}
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return fmt.Sprintf(`{
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"cards": [
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{
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"sections": [
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{
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"widgets": [
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{
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"keyValue": {
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"topLabel": "%s [%s]",
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"content": "%s",
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"contentMultiline": "true",
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"bottomLabel": "%s",
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"icon": "BOOKMARK"
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}
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},
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{
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"keyValue": {
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"topLabel": "Condition results",
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"content": "%s",
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"contentMultiline": "true",
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"icon": "DESCRIPTION"
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}
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},
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{
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"buttons": [
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{
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"textButton": {
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"text": "URL",
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"onClick": {
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"openLink": {
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"url": "%s"
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}
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}
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}
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}
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]
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}
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]
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}
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]
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}
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]
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}`, endpoint.Name, endpoint.Group, message, description, results, endpoint.URL)
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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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160
alerting/provider/googlechat/googlechat_test.go
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160
alerting/provider/googlechat/googlechat_test.go
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package googlechat
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import (
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"encoding/json"
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"net/http"
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"testing"
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"github.com/TwiN/gatus/v3/alerting/alert"
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"github.com/TwiN/gatus/v3/client"
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"github.com/TwiN/gatus/v3/core"
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"github.com/TwiN/gatus/v3/test"
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)
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func TestAlertProvider_IsValid(t *testing.T) {
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invalidProvider := AlertProvider{WebhookURL: ""}
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if invalidProvider.IsValid() {
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t.Error("provider shouldn't have been valid")
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}
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validProvider := AlertProvider{WebhookURL: "http://example.com"}
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if !validProvider.IsValid() {
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t.Error("provider should've been valid")
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}
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}
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func TestAlertProvider_Send(t *testing.T) {
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defer client.InjectHTTPClient(nil)
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firstDescription := "description-1"
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secondDescription := "description-2"
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scenarios := []struct {
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Name string
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Provider AlertProvider
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Alert alert.Alert
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Resolved bool
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MockRoundTripper test.MockRoundTripper
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ExpectedError bool
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}{
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{
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Name: "triggered",
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Provider: AlertProvider{},
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Alert: alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
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Resolved: false,
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MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
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return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
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}),
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ExpectedError: false,
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},
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{
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Name: "triggered-error",
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Provider: AlertProvider{},
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Alert: alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
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Resolved: false,
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MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
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return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
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}),
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ExpectedError: true,
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},
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{
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Name: "resolved",
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Provider: AlertProvider{},
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Alert: alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
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Resolved: true,
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MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
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return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
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}),
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ExpectedError: false,
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},
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{
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Name: "resolved-error",
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Provider: AlertProvider{},
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Alert: alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
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Resolved: true,
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MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
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return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
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}),
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ExpectedError: true,
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},
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}
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for _, scenario := range scenarios {
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t.Run(scenario.Name, func(t *testing.T) {
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client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
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err := scenario.Provider.Send(
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&core.Endpoint{Name: "endpoint-name", Group: "endpoint-group"},
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&scenario.Alert,
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&core.Result{
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ConditionResults: []*core.ConditionResult{
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{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
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{Condition: "[STATUS] == 200", Success: scenario.Resolved},
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},
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},
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scenario.Resolved,
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)
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if scenario.ExpectedError && err == nil {
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t.Error("expected error, got none")
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}
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if !scenario.ExpectedError && err != nil {
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t.Error("expected no error, got", err.Error())
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}
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})
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}
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}
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func TestAlertProvider_buildRequestBody(t *testing.T) {
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firstDescription := "description-1"
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secondDescription := "description-2"
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scenarios := []struct {
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Name string
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Provider AlertProvider
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Alert alert.Alert
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Resolved bool
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ExpectedBody string
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}{
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{
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Name: "triggered",
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Provider: AlertProvider{},
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Alert: alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
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Resolved: false,
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ExpectedBody: "{\n \"cards\": [\n {\n \"sections\": [\n {\n \"widgets\": [\n {\n \"keyValue\": {\n \"topLabel\": \"endpoint-name []\",\n \"content\": \"\u003cfont color='#DD0000'\u003eAn alert has been triggered due to having failed 3 time(s) in a row\u003c/font\u003e\",\n \"contentMultiline\": \"true\",\n \"bottomLabel\": \":: description-1\",\n \"icon\": \"BOOKMARK\"\n }\n },\n {\n \"keyValue\": {\n \"topLabel\": \"Condition results\",\n \"content\": \"❌ [CONNECTED] == true\u003cbr\u003e❌ [STATUS] == 200\u003cbr\u003e\",\n \"contentMultiline\": \"true\",\n \"icon\": \"DESCRIPTION\"\n }\n },\n {\n \"buttons\": [\n {\n \"textButton\": {\n \"text\": \"URL\",\n \"onClick\": {\n \"openLink\": {\n \"url\": \"\"\n }\n }\n }\n }\n ]\n }\n ]\n }\n ]\n }\n]\n}",
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},
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{
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Name: "resolved",
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Provider: AlertProvider{},
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Alert: alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
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Resolved: true,
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ExpectedBody: "{\n \"cards\": [\n {\n \"sections\": [\n {\n \"widgets\": [\n {\n \"keyValue\": {\n \"topLabel\": \"endpoint-name []\",\n \"content\": \"\u003cfont color='#36A64F'\u003eAn alert has been resolved after passing successfully 5 time(s) in a row\u003c/font\u003e\",\n \"contentMultiline\": \"true\",\n \"bottomLabel\": \":: description-2\",\n \"icon\": \"BOOKMARK\"\n }\n },\n {\n \"keyValue\": {\n \"topLabel\": \"Condition results\",\n \"content\": \"✅ [CONNECTED] == true\u003cbr\u003e✅ [STATUS] == 200\u003cbr\u003e\",\n \"contentMultiline\": \"true\",\n \"icon\": \"DESCRIPTION\"\n }\n },\n {\n \"buttons\": [\n {\n \"textButton\": {\n \"text\": \"URL\",\n \"onClick\": {\n \"openLink\": {\n \"url\": \"\"\n }\n }\n }\n }\n ]\n }\n ]\n }\n ]\n }\n]\n}",
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},
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}
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for _, scenario := range scenarios {
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t.Run(scenario.Name, func(t *testing.T) {
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body := scenario.Provider.buildRequestBody(
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&core.Endpoint{Name: "endpoint-name"},
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&scenario.Alert,
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&core.Result{
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ConditionResults: []*core.ConditionResult{
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{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
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{Condition: "[STATUS] == 200", Success: scenario.Resolved},
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},
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},
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scenario.Resolved,
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)
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b, _ := json.Marshal(body)
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e, _ := json.Marshal(scenario.ExpectedBody)
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if body != scenario.ExpectedBody {
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t.Errorf("expected %s, got %s", e, b)
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}
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out := make(map[string]interface{})
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if err := json.Unmarshal([]byte(body), &out); err != nil {
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t.Error("expected body to be valid JSON, got error:", err.Error())
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}
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})
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}
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}
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func TestAlertProvider_GetDefaultAlert(t *testing.T) {
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if (AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
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t.Error("expected default alert to be not nil")
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}
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if (AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
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t.Error("expected default alert to be nil")
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}
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}
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