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Add optional error message on authentication fail #24

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Add optional error message on authentication fail #24

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7 changes: 5 additions & 2 deletions http.go
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ type service struct {
type Server struct {
config Config
services []service
AuthFunc func(Credential, *Request) (bool, error)
AuthFunc func(Credential, *Request) (bool, string, error)
}

type Request struct {
Expand Down Expand Up @@ -103,14 +103,17 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
return
}

allow, err := s.AuthFunc(cred, req)
allow, msg, err := s.AuthFunc(cred, req)
if !allow || err != nil {
if err != nil {
logError("auth", err)
}

logError("auth", fmt.Errorf("rejected user %s", cred.Username))
w.WriteHeader(http.StatusUnauthorized)
if msg != "" {
w.Write([]byte(msg))
}
return
}
}
Expand Down