Throw error when attempting to http fetch local object

src/error.rs

@@ -78,6 +78,9 @@ pub enum Error {
     /// Attempted to fetch object but the response's id field doesn't match
     #[error("Attempted to fetch object from {0} but the response's id field doesn't match")]
     FetchWrongId(Url),
+    /// Object which has local domain cannot be fetched over HTTP
+    #[error("Object which has local domain cannot be fetched over HTTP")]
+    CannotDereferenceLocalObject,
     /// Other generic errors
     #[error("{0}")]
     Other(String),

src/fetch/object_id.rs

@@ -92,7 +92,7 @@ where
         // object found in database
         if let Some(object) = db_object {
             if let Some(last_refreshed_at) = object.last_refreshed_at() {
-                let is_local = data.config.is_local_url(&self.0);
+                let is_local = self.is_local(data);
                 if !is_local && should_refetch_object(last_refreshed_at) {
                     // object is outdated and should be refetched
                     return self.dereference_from_http(data, Some(object)).await;
@@ -158,6 +158,10 @@ where
     where
         <Kind as Object>::Error: From<Error>,
     {
+        if self.is_local(data) {
+            return Err(Error::CannotDereferenceLocalObject.into());
+        }
+
         let res = Box::pin(fetch_object_http(&self.0, data)).await;
 
         if let Err(Error::ObjectDeleted(url)) = res {
@@ -170,6 +174,10 @@ where
         let res = res?;
         let redirect_url = &res.url;
 
+        if data.config.is_local_url(&redirect_url) {
+            return Err(Error::CannotDereferenceLocalObject.into());
+        }
+
         Box::pin(Kind::verify(&res.object, redirect_url, data)).await?;
         Box::pin(Kind::from_json(res.object, data)).await
     }