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package channel
import (
"errors"
"net/http"
"time"
"gitlab.com/gitlab-org/gitlab/workhorse/internal/api"
)
type AuthCheckerFunc func() *api.ChannelSettings
// Regularly checks that authorization is still valid for a channel, outputting
// to the stopper when it isn't
type AuthChecker struct {
Checker AuthCheckerFunc
Template *api.ChannelSettings
StopCh chan error
Done chan struct{}
Count int64
}
var ErrAuthChanged = errors.New("connection closed: authentication changed or endpoint unavailable")
func NewAuthChecker(f AuthCheckerFunc, template *api.ChannelSettings, stopCh chan error) *AuthChecker {
return &AuthChecker{
Checker: f,
Template: template,
StopCh: stopCh,
Done: make(chan struct{}),
}
}
func (c *AuthChecker) Loop(interval time.Duration) {
for {
select {
case <-time.After(interval):
settings := c.Checker()
if !c.Template.IsEqual(settings) {
c.StopCh <- ErrAuthChanged
return
}
c.Count = c.Count + 1
case <-c.Done:
return
}
}
}
func (c *AuthChecker) Close() error {
close(c.Done)
return nil
}
// Generates a CheckerFunc from an *api.API + request needing authorization
func authCheckFunc(myAPI *api.API, r *http.Request, suffix string) AuthCheckerFunc {
return func() *api.ChannelSettings {
httpResponse, authResponse, err := myAPI.PreAuthorize(suffix, r)
if err != nil {
return nil
}
defer httpResponse.Body.Close()
if httpResponse.StatusCode != http.StatusOK || authResponse == nil {
return nil
}
return authResponse.Channel
}
}
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