116 lines
3 KiB
Go
116 lines
3 KiB
Go
package mattermost
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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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"errors"
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"fmt"
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"net/http"
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"net/url"
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"time"
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"github.com/nicholas-fedor/shoutrrr/pkg/format"
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"github.com/nicholas-fedor/shoutrrr/pkg/services/standard"
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"github.com/nicholas-fedor/shoutrrr/pkg/types"
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)
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// defaultHTTPTimeout is the default timeout for HTTP requests.
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const defaultHTTPTimeout = 10 * time.Second
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// ErrSendFailed indicates that the notification failed due to an unexpected response status code.
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var ErrSendFailed = errors.New(
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"failed to send notification to service, response status code unexpected",
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)
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// Service sends notifications to a pre-configured Mattermost channel or user.
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type Service struct {
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standard.Standard
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Config *Config
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pkr format.PropKeyResolver
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httpClient *http.Client
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}
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// GetHTTPClient returns the service's HTTP client for testing purposes.
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func (service *Service) GetHTTPClient() *http.Client {
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return service.httpClient
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}
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// Initialize configures the service with a URL and logger.
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func (service *Service) Initialize(configURL *url.URL, logger types.StdLogger) error {
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service.SetLogger(logger)
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service.Config = &Config{}
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service.pkr = format.NewPropKeyResolver(service.Config)
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err := service.Config.setURL(&service.pkr, configURL)
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if err != nil {
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return err
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}
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var transport *http.Transport
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if service.Config.DisableTLS {
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transport = &http.Transport{
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TLSClientConfig: nil, // Plain HTTP
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}
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} else {
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transport = &http.Transport{
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TLSClientConfig: &tls.Config{
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InsecureSkipVerify: false, // Explicitly safe when TLS is enabled
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MinVersion: tls.VersionTLS12, // Enforce TLS 1.2 or higher
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},
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}
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}
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service.httpClient = &http.Client{Transport: transport}
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return nil
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}
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// GetID returns the service identifier.
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func (service *Service) GetID() string {
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return Scheme
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}
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// Send delivers a notification message to Mattermost.
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func (service *Service) Send(message string, params *types.Params) error {
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config := service.Config
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apiURL := buildURL(config)
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if err := service.pkr.UpdateConfigFromParams(config, params); err != nil {
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return fmt.Errorf("updating config from params: %w", err)
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}
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json, _ := CreateJSONPayload(config, message, params)
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ctx, cancel := context.WithTimeout(context.Background(), defaultHTTPTimeout)
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defer cancel()
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, apiURL, bytes.NewReader(json))
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if err != nil {
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return fmt.Errorf("creating POST request: %w", err)
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}
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req.Header.Set("Content-Type", "application/json")
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res, err := service.httpClient.Do(req)
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if err != nil {
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return fmt.Errorf("executing POST request to Mattermost API: %w", err)
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}
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defer res.Body.Close()
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if res.StatusCode != http.StatusOK {
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return fmt.Errorf("%w: %s", ErrSendFailed, res.Status)
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}
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return nil
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}
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// buildURL constructs the API URL for Mattermost based on the Config.
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func buildURL(config *Config) string {
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scheme := "https"
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if config.DisableTLS {
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scheme = "http"
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}
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return fmt.Sprintf("%s://%s/hooks/%s", scheme, config.Host, config.Token)
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}
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