dav: add new http IMPORT method

crates/dav/src/resource/axum_methods.rs

@@ -38,6 +38,11 @@ pub trait AxumMethods: Sized + Send + Sync + 'static {
         None
     }
 
+    #[inline]
+    fn import() -> Option<MethodFunction<Self>> {
+        None
+    }
+
     #[inline]
     fn allow_header() -> Allow {
         let mut allow = vec![
@@ -67,6 +72,9 @@ pub trait AxumMethods: Sized + Send + Sync + 'static {
         if Self::put().is_some() {
             allow.push(Method::PUT);
         }
+        if Self::import().is_some() {
+            allow.push(Method::from_str("IMPORT").unwrap());
+        }
 
         allow.into_iter().collect()
     }

crates/dav/src/resource/axum_service.rs

@@ -97,6 +97,11 @@ where
                     return svc(self.resource_service.clone(), req);
                 }
             }
+            "IMPORT" => {
+                if let Some(svc) = RS::import() {
+                    return svc(self.resource_service.clone(), req);
+                }
+            }
             _ => {}
         };
         Box::pin(async move {