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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| // 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 googlechat | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "net/http" | ||
| "net/url" | ||
| "os" | ||
| "strings" | ||
|
|
||
| "github.com/go-kit/log" | ||
| 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" | ||
| ) | ||
|
|
||
| type Notifier struct { | ||
| conf *config.GoogleChatConfig | ||
| tmpl *template.Template | ||
| logger log.Logger | ||
| client *http.Client | ||
| retrier *notify.Retrier | ||
| } | ||
|
|
||
| func New(conf *config.GoogleChatConfig, t *template.Template, l log.Logger, httpOpts ...commoncfg.HTTPClientOption) (*Notifier, error) { | ||
| client, err := commoncfg.NewClientFromConfig(*conf.HTTPConfig, "googlechat", httpOpts...) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &Notifier{ | ||
| conf: conf, | ||
| tmpl: t, | ||
| logger: l, | ||
| client: client, | ||
| retrier: ¬ify.Retrier{}, | ||
| }, nil | ||
| } | ||
|
|
||
| // Message represents the structure for sending a | ||
| // Text message in Google Chat Webhook endpoint. | ||
| // https://developers.google.com/chat/api/guides/message-formats/basic | ||
| type Message struct { | ||
| Text string `json:"text"` | ||
| } | ||
|
|
||
| // Notify implements the Notifier interface. | ||
| func (n *Notifier) Notify(ctx context.Context, alert ...*types.Alert) (bool, error) { | ||
| key, err := notify.ExtractGroupKey(ctx) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
|
|
||
| var ( | ||
| data = notify.GetTemplateData(ctx, n.tmpl, alert, n.logger) | ||
| tmpl = notify.TmplText(n.tmpl, data, &err) | ||
| ) | ||
|
|
||
| message := tmpl(n.conf.Message) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
|
|
||
| msg := &Message{ | ||
| Text: message, | ||
| } | ||
|
|
||
| var buf bytes.Buffer | ||
| if err := json.NewEncoder(&buf).Encode(msg); err != nil { | ||
| return false, err | ||
| } | ||
|
|
||
| var webhookURL string | ||
| if n.conf.URL != nil { | ||
| webhookURL = n.conf.URL.String() | ||
| } else { | ||
| content, err := os.ReadFile(n.conf.URLFile) | ||
| if err != nil { | ||
| return false, fmt.Errorf("read url_file: %w", err) | ||
| } | ||
| webhookURL = strings.TrimSpace(string(content)) | ||
| } | ||
|
|
||
| // https://developers.google.com/chat/how-tos/webhooks#start_a_message_thread | ||
| // To post the first message of a thread with a webhook, | ||
| // append the threadKey and messageReplyOption parameters to the webhook URL. | ||
| // Set the threadKey to an arbitrary string, but remember what it is; | ||
| // you'll need to specify it again to post a reply to the thread. | ||
| // https://chat.googleapis.com/v1/spaces/SPACE_ID/messages?threadKey=ARBITRARY_STRING&messageReplyOption=REPLY_MESSAGE_FALLBACK_TO_NEW_THREAD | ||
|
|
||
| u, err := url.Parse(webhookURL) | ||
| if err != nil { | ||
| return false, fmt.Errorf("unable to parse googlechat url: %w", err) | ||
| } | ||
| q := u.Query() | ||
| if n.conf.Threading { | ||
| q.Set("threadKey", key.Hash()) | ||
| q.Set("messageReplyOption", "REPLY_MESSAGE_FALLBACK_TO_NEW_THREAD") | ||
| } | ||
| u.RawQuery = q.Encode() | ||
| webhookURL = u.String() | ||
|
|
||
| resp, err := notify.PostJSON(ctx, n.client, webhookURL, &buf) | ||
| if err != nil { | ||
| 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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