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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| // Copyright 2019 Prometheus Team | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package webhook_template | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "log/slog" | ||
| "net/http" | ||
| "os" | ||
| "strings" | ||
|
|
||
| commoncfg "github.com/prometheus/common/config" | ||
|
|
||
| "github.com/prometheus/alertmanager/config" | ||
| "github.com/prometheus/alertmanager/notify" | ||
| "github.com/prometheus/alertmanager/template" | ||
| "github.com/prometheus/alertmanager/types" | ||
| ) | ||
|
|
||
| // Notifier implements a Notifier for generic webhooks. | ||
| type Notifier struct { | ||
| conf *config.WebhookTemplateConfig | ||
| tmpl *template.Template | ||
| logger *slog.Logger | ||
| client *http.Client | ||
| retrier *notify.Retrier | ||
| } | ||
|
|
||
| // New returns a new Webhook. | ||
| func New(conf *config.WebhookTemplateConfig, t *template.Template, l *slog.Logger, httpOpts ...commoncfg.HTTPClientOption) (*Notifier, error) { | ||
| client, err := commoncfg.NewClientFromConfig(*conf.HTTPConfig, "webhook_template", httpOpts...) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &Notifier{ | ||
| conf: conf, | ||
| tmpl: t, | ||
| logger: l, | ||
| client: client, | ||
| // Webhooks are assumed to respond with 2xx response codes on a successful | ||
| // request and 5xx response codes are assumed to be recoverable. | ||
| retrier: ¬ify.Retrier{}, | ||
| }, nil | ||
| } | ||
|
|
||
| // Notify implements the Notifier interface. | ||
| func (n *Notifier) Notify(ctx context.Context, alerts ...*types.Alert) (bool, error) { | ||
| key, err := notify.ExtractGroupKey(ctx) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| n.logger.Debug("extracted group key", "key", key) | ||
|
|
||
| data := notify.GetTemplateData(ctx, n.tmpl, alerts, n.logger) | ||
| tmpl := notify.TmplText(n.tmpl, data, &err) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
|
|
||
| body := tmpl(n.conf.Template) | ||
|
|
||
| var buf bytes.Buffer | ||
| if err := json.NewEncoder(&buf).Encode(body); err != nil { | ||
| return false, err | ||
| } | ||
|
|
||
| var url string | ||
| if n.conf.URL != nil { | ||
| url = n.conf.URL.String() | ||
| } else { | ||
| content, err := os.ReadFile(n.conf.URLFile) | ||
| if err != nil { | ||
| return false, fmt.Errorf("read url_file: %w", err) | ||
| } | ||
| url = strings.TrimSpace(string(content)) | ||
| } | ||
|
|
||
| if n.conf.Timeout > 0 { | ||
| postCtx, cancel := context.WithTimeoutCause(ctx, n.conf.Timeout, fmt.Errorf("configured webhook template timeout reached (%s)", n.conf.Timeout)) | ||
| defer cancel() | ||
| ctx = postCtx | ||
| } | ||
|
|
||
| resp, err := notify.PostJSON(ctx, n.client, url, &buf) | ||
| if err != nil { | ||
| if ctx.Err() != nil { | ||
| err = fmt.Errorf("%w: %w", err, context.Cause(ctx)) | ||
| } | ||
| return true, notify.RedactURL(err) | ||
| } | ||
| defer notify.Drain(resp) | ||
|
|
||
| shouldRetry, err := n.retrier.Check(resp.StatusCode, resp.Body) | ||
| if err != nil { | ||
| return shouldRetry, notify.NewErrorWithReason(notify.GetFailureReasonFromStatusCode(resp.StatusCode), err) | ||
| } | ||
| return shouldRetry, err | ||
| } |
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