Don't fetch metadata in background for local API requests.

crates/api_common/src/request.rs

@@ -66,22 +66,21 @@ pub async fn fetch_link_metadata(url: &Url, context: &LemmyContext) -> LemmyResu
   })
 }
 
-/// Generate post thumbnail in background task, because some sites can be very slow to respond.
+/// Generates and saves a post thumbnail and metadata.
 ///
 /// Takes a callback to generate a send activity task, so that post can be federated with metadata.
 ///
 /// TODO: `federated_thumbnail` param can be removed once we federate full metadata and can
 ///       write it to db directly, without calling this function.
 ///       https://github.com/LemmyNet/lemmy/issues/4598
-pub fn generate_post_link_metadata(
+pub async fn generate_post_link_metadata(
   post: Post,
   custom_thumbnail: Option<Url>,
   federated_thumbnail: Option<Url>,
   send_activity: impl FnOnce(Post) -> Option<SendActivityData> + Send + 'static,
   local_site: Option<LocalSite>,
   context: Data<LemmyContext>,
-) {
-  spawn_try_task(async move {
+) -> LemmyResult<()> {
   let metadata = match &post.url {
     Some(url) => fetch_link_metadata(url, &context).await.unwrap_or_default(),
     _ => Default::default(),
@@ -146,7 +145,28 @@ pub fn generate_post_link_metadata(
     ActivityChannel::submit_activity(send_activity, &context).await?;
   }
   Ok(())
-  });
+}
+
+/// Generates a post thumbnail in background task, because some sites can be very slow to respond.
+pub fn generate_post_link_metadata_background(
+  post: Post,
+  custom_thumbnail: Option<Url>,
+  federated_thumbnail: Option<Url>,
+  send_activity: impl FnOnce(Post) -> Option<SendActivityData> + Send + 'static,
+  local_site: Option<LocalSite>,
+  context: Data<LemmyContext>,
+) {
+  spawn_try_task(async move {
+    generate_post_link_metadata(
+      post,
+      custom_thumbnail,
+      federated_thumbnail,
+      send_activity,
+      local_site,
+      context,
+    )
+    .await
+  })
 }
 
 /// Extract site metadata from HTML Opengraph attributes.

crates/api_crud/src/post/create.rs

@@ -161,7 +161,8 @@ pub async fn create_post(
     |post| Some(SendActivityData::CreatePost(post)),
     Some(local_site),
     context.reset_request_count(),
-  );
+  )
+  .await?;
 
   // They like their own post by default
   let person_id = local_user_view.person.id;

crates/api_crud/src/post/update.rs

@@ -116,7 +116,8 @@ pub async fn update_post(
     |post| Some(SendActivityData::UpdatePost(post)),
     Some(local_site),
     context.reset_request_count(),
-  );
+  )
+  .await?;
 
   build_post_response(
     context.deref(),

crates/apub/src/objects/post.rs

@@ -24,7 +24,7 @@ use chrono::{DateTime, Utc};
 use html2text::{from_read_with_decorator, render::text_renderer::TrivialDecorator};
 use lemmy_api_common::{
   context::LemmyContext,
-  request::generate_post_link_metadata,
+  request::generate_post_link_metadata_background,
   utils::{
     get_url_blocklist,
     local_site_opt_to_slur_regex,
@@ -278,7 +278,7 @@ impl Object for ApubPost {
     let timestamp = page.updated.or(page.published).unwrap_or_else(naive_now);
     let post = Post::insert_apub(&mut context.pool(), timestamp, &form).await?;
 
-    generate_post_link_metadata(
+    generate_post_link_metadata_background(
       post.clone(),
       None,
       page.image.map(|i| i.url),