diff options
| -rw-r--r-- | plugins/carddav/plugin.go | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/plugins/carddav/plugin.go b/plugins/carddav/plugin.go index 45e447e..5f51069 100644 --- a/plugins/carddav/plugin.go +++ b/plugins/carddav/plugin.go @@ -11,6 +11,25 @@ import ( "github.com/emersion/go-webdav/carddav" ) +func sanityCheckURL(u *url.URL) error { + req, err := http.NewRequest(http.MethodOptions, u.String(), nil) + if err != nil { + return err + } + + resp, err := http.DefaultClient.Do(req) + if err != nil { + return err + } + resp.Body.Close() + + // Servers might require authentication to perform an OPTIONS request + if resp.StatusCode/100 != 2 && resp.StatusCode != http.StatusUnauthorized { + return fmt.Errorf("HTTP request failed: %v %v", resp.StatusCode, resp.Status) + } + return nil +} + type authRoundTripper struct { upstream http.RoundTripper session *koushin.Session @@ -43,6 +62,11 @@ func newPlugin(srv *koushin.Server) (koushin.Plugin, error) { return nil, fmt.Errorf("carddav: Discover returned an invalid URL: %v", err) } } + + if err := sanityCheckURL(u); err != nil { + return nil, fmt.Errorf("carddav: failed to connect to CardDAV server %q: %v", u, err) + } + srv.Logger().Printf("Configured upstream CardDAV server: %v", u) p := koushin.GoPlugin{Name: "carddav"} |