mirror of https://github.com/grafana/grafana.git
112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
package notifications
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import (
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"bytes"
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"context"
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"crypto/tls"
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"fmt"
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"io"
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"net"
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"net/http"
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"time"
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"github.com/grafana/grafana/pkg/util"
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)
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type Webhook struct {
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Url string
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User string
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Password string
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Body string
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HttpMethod string
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HttpHeader map[string]string
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ContentType string
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// Validation is a function that will validate the response body and statusCode of the webhook. Any returned error will cause the webhook request to be considered failed.
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// This can be useful when a webhook service communicates failures in creative ways, such as using the response body instead of the status code.
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Validation func(body []byte, statusCode int) error
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}
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// WebhookClient exists to mock the client in tests.
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type WebhookClient interface {
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Do(req *http.Request) (*http.Response, error)
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}
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var netTransport = &http.Transport{
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TLSClientConfig: &tls.Config{
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Renegotiation: tls.RenegotiateFreelyAsClient,
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},
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Proxy: http.ProxyFromEnvironment,
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Dial: (&net.Dialer{
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Timeout: 30 * time.Second,
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}).Dial,
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TLSHandshakeTimeout: 5 * time.Second,
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}
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var netClient WebhookClient = &http.Client{
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Timeout: time.Second * 30,
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Transport: netTransport,
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}
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func (ns *NotificationService) sendWebRequestSync(ctx context.Context, webhook *Webhook) error {
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if webhook.HttpMethod == "" {
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webhook.HttpMethod = http.MethodPost
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}
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ns.log.Debug("Sending webhook", "url", webhook.Url, "http method", webhook.HttpMethod)
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if webhook.HttpMethod != http.MethodPost && webhook.HttpMethod != http.MethodPut {
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return fmt.Errorf("webhook only supports HTTP methods PUT or POST")
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}
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request, err := http.NewRequestWithContext(ctx, webhook.HttpMethod, webhook.Url, bytes.NewReader([]byte(webhook.Body)))
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if err != nil {
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return err
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}
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if webhook.ContentType == "" {
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webhook.ContentType = "application/json"
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}
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request.Header.Set("Content-Type", webhook.ContentType)
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request.Header.Set("User-Agent", "Grafana")
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if webhook.User != "" && webhook.Password != "" {
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request.Header.Set("Authorization", util.GetBasicAuthHeader(webhook.User, webhook.Password))
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}
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for k, v := range webhook.HttpHeader {
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request.Header.Set(k, v)
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}
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resp, err := netClient.Do(request)
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if err != nil {
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return err
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}
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defer func() {
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if err := resp.Body.Close(); err != nil {
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ns.log.Warn("Failed to close response body", "err", err)
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}
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}()
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return err
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}
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if webhook.Validation != nil {
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err := webhook.Validation(body, resp.StatusCode)
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if err != nil {
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ns.log.Debug("Webhook failed validation", "url", webhook.Url, "statuscode", resp.Status, "body", string(body))
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return fmt.Errorf("webhook failed validation: %w", err)
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}
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}
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if resp.StatusCode/100 == 2 {
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ns.log.Debug("Webhook succeeded", "url", webhook.Url, "statuscode", resp.Status)
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return nil
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}
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ns.log.Debug("Webhook failed", "url", webhook.Url, "statuscode", resp.Status, "body", string(body))
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return fmt.Errorf("webhook response status %v", resp.Status)
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}
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