feat(alerting): Add Pushover provider (#405)

* Add a new Pushover provider (#129)
- Adds new provider named Pushover with corresponding tests
- Adds Pushover as a provider to the configuration and adjusts test accordingly
- Adds Pushover to alerting_test.go, provider.go and type.go
- Updates the readme with configuration details

* Correct import order

* Fix some missing pushover references

* Apply suggestions from code review

* Rename application-key to application-token for Pushover

---------

Co-authored-by: TwiN <twin@linux.com>
This commit is contained in:
Kevin Woblick
2023-01-29 23:32:16 +01:00
committed by GitHub
parent d75180c341
commit 21f62f362f
9 changed files with 454 additions and 8 deletions

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@ -13,6 +13,7 @@ import (
"github.com/TwiN/gatus/v5/alerting/provider/ntfy"
"github.com/TwiN/gatus/v5/alerting/provider/opsgenie"
"github.com/TwiN/gatus/v5/alerting/provider/pagerduty"
"github.com/TwiN/gatus/v5/alerting/provider/pushover"
"github.com/TwiN/gatus/v5/alerting/provider/slack"
"github.com/TwiN/gatus/v5/alerting/provider/teams"
"github.com/TwiN/gatus/v5/alerting/provider/telegram"
@ -67,6 +68,7 @@ var (
_ AlertProvider = (*ntfy.AlertProvider)(nil)
_ AlertProvider = (*opsgenie.AlertProvider)(nil)
_ AlertProvider = (*pagerduty.AlertProvider)(nil)
_ AlertProvider = (*pushover.AlertProvider)(nil)
_ AlertProvider = (*slack.AlertProvider)(nil)
_ AlertProvider = (*teams.AlertProvider)(nil)
_ AlertProvider = (*telegram.AlertProvider)(nil)

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@ -0,0 +1,106 @@
package pushover
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"github.com/TwiN/gatus/v5/alerting/alert"
"github.com/TwiN/gatus/v5/client"
"github.com/TwiN/gatus/v5/core"
)
const (
restAPIURL = "https://api.pushover.net/1/messages.json"
defaultPriority = 0
)
// AlertProvider is the configuration necessary for sending an alert using Pushover
type AlertProvider struct {
// Key used to authenticate the application sending
// See "Your Applications" on the dashboard, or add a new one: https://pushover.net/apps/build
ApplicationToken string `yaml:"application-token"`
// Key of the user or group the messages should be sent to
UserKey string `yaml:"user-key"`
// The title of your message, likely the application name
// default: the name of your application in Pushover
Title string `yaml:"title,omitempty"`
// Priority of all messages, ranging from -2 (very low) to 2 (Emergency)
// default: 0
Priority int `yaml:"priority,omitempty"`
// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
}
// IsValid returns whether the provider's configuration is valid
func (provider *AlertProvider) IsValid() bool {
if provider.Priority == 0 {
provider.Priority = defaultPriority
}
return len(provider.ApplicationToken) == 30 && len(provider.UserKey) == 30 && provider.Priority >= -2 && provider.Priority <= 2
}
// Send an alert using the provider
// Reference doc for pushover: https://pushover.net/api
func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
request, err := http.NewRequest(http.MethodPost, restAPIURL, buffer)
if err != nil {
return err
}
request.Header.Set("Content-Type", "application/json")
response, err := client.GetHTTPClient(nil).Do(request)
if err != nil {
return err
}
defer response.Body.Close()
if response.StatusCode > 399 {
body, _ := io.ReadAll(response.Body)
return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
}
return err
}
type Body struct {
Token string `json:"token"`
User string `json:"user"`
Title string `json:"title,omitempty"`
Message string `json:"message"`
Priority int `json:"priority"`
}
// buildRequestBody builds the request body for the provider
func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
var message string
if resolved {
message = fmt.Sprintf("RESOLVED: %s - %s", endpoint.DisplayName(), alert.GetDescription())
} else {
message = fmt.Sprintf("TRIGGERED: %s - %s", endpoint.DisplayName(), alert.GetDescription())
}
body, _ := json.Marshal(Body{
Token: provider.ApplicationToken,
User: provider.UserKey,
Title: provider.Title,
Message: message,
Priority: provider.priority(),
})
return body
}
func (provider *AlertProvider) priority() int {
if provider.Priority == 0 {
return defaultPriority
}
return provider.Priority
}
// GetDefaultAlert returns the provider's default alert configuration
func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
return provider.DefaultAlert
}

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@ -0,0 +1,174 @@
package pushover
import (
"encoding/json"
"net/http"
"testing"
"github.com/TwiN/gatus/v5/alerting/alert"
"github.com/TwiN/gatus/v5/client"
"github.com/TwiN/gatus/v5/core"
"github.com/TwiN/gatus/v5/test"
)
func TestPushoverAlertProvider_IsValid(t *testing.T) {
invalidProvider := AlertProvider{}
if invalidProvider.IsValid() {
t.Error("provider shouldn't have been valid")
}
validProvider := AlertProvider{
ApplicationToken: "aTokenWithLengthOf30characters",
UserKey: "aTokenWithLengthOf30characters",
Title: "Gatus Notification",
Priority: 1,
}
if !validProvider.IsValid() {
t.Error("provider should've been valid")
}
}
func TestPushoverAlertProvider_IsInvalid(t *testing.T) {
invalidProvider := AlertProvider{
ApplicationToken: "aTokenWithLengthOfMoreThan30characters",
UserKey: "aTokenWithLengthOfMoreThan30characters",
Priority: 5,
}
if invalidProvider.IsValid() {
t.Error("provider should've been invalid")
}
}
func TestAlertProvider_Send(t *testing.T) {
defer client.InjectHTTPClient(nil)
firstDescription := "description-1"
secondDescription := "description-2"
scenarios := []struct {
Name string
Provider AlertProvider
Alert alert.Alert
Resolved bool
MockRoundTripper test.MockRoundTripper
ExpectedError bool
}{
{
Name: "triggered",
Provider: AlertProvider{},
Alert: alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
Resolved: false,
MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
}),
ExpectedError: false,
},
{
Name: "triggered-error",
Provider: AlertProvider{},
Alert: alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
Resolved: false,
MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
}),
ExpectedError: true,
},
{
Name: "resolved",
Provider: AlertProvider{},
Alert: alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
Resolved: true,
MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
}),
ExpectedError: false,
},
{
Name: "resolved-error",
Provider: AlertProvider{},
Alert: alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
Resolved: true,
MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
}),
ExpectedError: true,
},
}
for _, scenario := range scenarios {
t.Run(scenario.Name, func(t *testing.T) {
client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
err := scenario.Provider.Send(
&core.Endpoint{Name: "endpoint-name"},
&scenario.Alert,
&core.Result{
ConditionResults: []*core.ConditionResult{
{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
{Condition: "[STATUS] == 200", Success: scenario.Resolved},
},
},
scenario.Resolved,
)
if scenario.ExpectedError && err == nil {
t.Error("expected error, got none")
}
if !scenario.ExpectedError && err != nil {
t.Error("expected no error, got", err.Error())
}
})
}
}
func TestAlertProvider_buildRequestBody(t *testing.T) {
firstDescription := "description-1"
secondDescription := "description-2"
scenarios := []struct {
Name string
Provider AlertProvider
Alert alert.Alert
Resolved bool
ExpectedBody string
}{
{
Name: "triggered",
Provider: AlertProvider{ApplicationToken: "TokenWithLengthOf30Characters1", UserKey: "TokenWithLengthOf30Characters4"},
Alert: alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
Resolved: false,
ExpectedBody: "{\"token\":\"TokenWithLengthOf30Characters1\",\"user\":\"TokenWithLengthOf30Characters4\",\"message\":\"TRIGGERED: endpoint-name - description-1\",\"priority\":0}",
},
{
Name: "resolved",
Provider: AlertProvider{ApplicationToken: "TokenWithLengthOf30Characters2", UserKey: "TokenWithLengthOf30Characters5", Title: "Gatus Notifications", Priority: 2},
Alert: alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
Resolved: true,
ExpectedBody: "{\"token\":\"TokenWithLengthOf30Characters2\",\"user\":\"TokenWithLengthOf30Characters5\",\"title\":\"Gatus Notifications\",\"message\":\"RESOLVED: endpoint-name - description-2\",\"priority\":2}",
},
}
for _, scenario := range scenarios {
t.Run(scenario.Name, func(t *testing.T) {
body := scenario.Provider.buildRequestBody(
&core.Endpoint{Name: "endpoint-name"},
&scenario.Alert,
&core.Result{
ConditionResults: []*core.ConditionResult{
{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
{Condition: "[STATUS] == 200", Success: scenario.Resolved},
},
},
scenario.Resolved,
)
if string(body) != scenario.ExpectedBody {
t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
}
out := make(map[string]interface{})
if err := json.Unmarshal([]byte(body), &out); err != nil {
t.Error("expected body to be valid JSON, got error:", err.Error())
}
})
}
}
func TestAlertProvider_GetDefaultAlert(t *testing.T) {
if (AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
t.Error("expected default alert to be not nil")
}
if (AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
t.Error("expected default alert to be nil")
}
}