mirror of
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90 lines
3.1 KiB
Go
90 lines
3.1 KiB
Go
package custom
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import (
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"bytes"
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"fmt"
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"github.com/TwinProduction/gatus/client"
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"github.com/TwinProduction/gatus/core"
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"io/ioutil"
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"net/http"
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"strings"
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)
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// AlertProvider is the configuration necessary for sending an alert using a custom HTTP request
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// Technically, all alert providers should be reachable using the custom alert provider
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type AlertProvider struct {
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Url string `yaml:"url"`
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Method string `yaml:"method,omitempty"`
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Body string `yaml:"body,omitempty"`
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Headers map[string]string `yaml:"headers,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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return len(provider.Url) > 0
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}
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// ToCustomAlertProvider converts the provider into a custom.AlertProvider
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func (provider *AlertProvider) ToCustomAlertProvider(service *core.Service, alert *core.Alert, result *core.Result, resolved bool) *AlertProvider {
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return provider
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}
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func (provider *AlertProvider) buildRequest(serviceName, alertDescription string, resolved bool) *http.Request {
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body := provider.Body
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providerUrl := provider.Url
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method := provider.Method
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if strings.Contains(body, "[ALERT_DESCRIPTION]") {
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body = strings.ReplaceAll(body, "[ALERT_DESCRIPTION]", alertDescription)
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}
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if strings.Contains(body, "[SERVICE_NAME]") {
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body = strings.ReplaceAll(body, "[SERVICE_NAME]", serviceName)
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}
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if strings.Contains(body, "[ALERT_TRIGGERED_OR_RESOLVED]") {
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if resolved {
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body = strings.ReplaceAll(body, "[ALERT_TRIGGERED_OR_RESOLVED]", "RESOLVED")
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} else {
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body = strings.ReplaceAll(body, "[ALERT_TRIGGERED_OR_RESOLVED]", "TRIGGERED")
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}
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}
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if strings.Contains(providerUrl, "[ALERT_DESCRIPTION]") {
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providerUrl = strings.ReplaceAll(providerUrl, "[ALERT_DESCRIPTION]", alertDescription)
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}
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if strings.Contains(providerUrl, "[SERVICE_NAME]") {
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providerUrl = strings.ReplaceAll(providerUrl, "[SERVICE_NAME]", serviceName)
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}
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if strings.Contains(providerUrl, "[ALERT_TRIGGERED_OR_RESOLVED]") {
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if resolved {
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providerUrl = strings.ReplaceAll(providerUrl, "[ALERT_TRIGGERED_OR_RESOLVED]", "RESOLVED")
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} else {
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providerUrl = strings.ReplaceAll(providerUrl, "[ALERT_TRIGGERED_OR_RESOLVED]", "TRIGGERED")
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}
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}
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if len(method) == 0 {
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method = "GET"
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}
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bodyBuffer := bytes.NewBuffer([]byte(body))
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request, _ := http.NewRequest(method, providerUrl, bodyBuffer)
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for k, v := range provider.Headers {
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request.Header.Set(k, v)
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}
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return request
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}
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// Send a request to the alert provider and return the body
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func (provider *AlertProvider) Send(serviceName, alertDescription string, resolved bool) ([]byte, error) {
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request := provider.buildRequest(serviceName, alertDescription, resolved)
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response, err := client.GetHttpClient().Do(request)
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if err != nil {
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return nil, err
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}
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if response.StatusCode > 399 {
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body, err := ioutil.ReadAll(response.Body)
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if err != nil {
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return nil, fmt.Errorf("call to provider alert returned status code %d", response.StatusCode)
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} else {
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return nil, fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
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}
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}
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return ioutil.ReadAll(response.Body)
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}
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