proxy links received over federation

crates/api/src/local_user/save_settings.rs

@@ -5,7 +5,7 @@ use lemmy_api_common::{
   utils::{
     local_site_to_slur_regex,
     process_markdown_opt,
-    proxy_image_link_opt,
+    proxy_image_link_opt_api,
     send_verification_email,
   },
   SuccessResponse,
@@ -36,8 +36,8 @@ pub async fn save_user_settings(
   let slur_regex = local_site_to_slur_regex(&site_view.local_site);
   let bio = process_markdown_opt(&data.bio, &slur_regex, &context).await?;
 
-  let avatar = proxy_image_link_opt(&data.avatar, &context).await?;
-  let banner = proxy_image_link_opt(&data.banner, &context).await?;
+  let avatar = proxy_image_link_opt_api(&data.avatar, &context).await?;
+  let banner = proxy_image_link_opt_api(&data.banner, &context).await?;
   let bio = diesel_option_overwrite(bio);
   let display_name = diesel_option_overwrite(data.display_name.clone());
   let matrix_user_id = diesel_option_overwrite(data.matrix_user_id.clone());

crates/api_common/src/utils.rs

@@ -828,20 +828,29 @@ pub async fn proxy_image_link(link: Url, context: &LemmyContext) -> LemmyResult<
   Ok(Url::parse(&proxied)?.into())
 }
 
-pub async fn proxy_image_link_opt(
+pub async fn proxy_image_link_opt_api(
   link: &Option<String>,
   context: &LemmyContext,
 ) -> LemmyResult<Option<Option<DbUrl>>> {
   let link = diesel_option_overwrite_to_url(link)?;
-  if let Some(Some(l)) = link {
-    proxy_image_link(l.into(), context)
+  if let Some(l) = link {
+    proxy_image_link_opt_apub(l.map(Into::into), context)
       .await
       .map(Some)
-      .map(Some)
   } else {
     Ok(link)
   }
 }
+pub async fn proxy_image_link_opt_apub(
+  link: Option<Url>,
+  context: &LemmyContext,
+) -> LemmyResult<Option<DbUrl>> {
+  if let Some(l) = link {
+    proxy_image_link(l.clone(), context).await.map(Some)
+  } else {
+    Ok(None)
+  }
+}
 
 #[cfg(test)]
 mod tests {

crates/api_crud/src/community/create.rs

@@ -12,7 +12,7 @@ use lemmy_api_common::{
     is_admin,
     local_site_to_slur_regex,
     process_markdown_opt,
-    proxy_image_link_opt,
+    proxy_image_link_opt_api,
     EndpointType,
   },
 };
@@ -56,8 +56,12 @@ pub async fn create_community(
   check_slurs(&data.name, &slur_regex)?;
   check_slurs(&data.title, &slur_regex)?;
   let description = process_markdown_opt(&data.description, &slur_regex, &context).await?;
-  let icon = proxy_image_link_opt(&data.icon, &context).await?.unwrap();
-  let banner = proxy_image_link_opt(&data.banner, &context).await?.unwrap();
+  let icon = proxy_image_link_opt_api(&data.icon, &context)
+    .await?
+    .unwrap();
+  let banner = proxy_image_link_opt_api(&data.banner, &context)
+    .await?
+    .unwrap();
 
   is_valid_actor_name(&data.name, local_site.actor_name_max_length as usize)?;
   is_valid_body_field(&data.description, false)?;

crates/api_crud/src/community/update.rs

@@ -9,7 +9,7 @@ use lemmy_api_common::{
     check_community_mod_action,
     local_site_to_slur_regex,
     process_markdown_opt,
-    proxy_image_link_opt,
+    proxy_image_link_opt_api,
   },
 };
 use lemmy_db_schema::{
@@ -41,8 +41,8 @@ pub async fn update_community(
   is_valid_body_field(&data.description, false)?;
 
   let description = diesel_option_overwrite(description);
-  let icon = proxy_image_link_opt(&data.icon, &context).await?;
-  let banner = proxy_image_link_opt(&data.banner, &context).await?;
+  let icon = proxy_image_link_opt_api(&data.icon, &context).await?;
+  let banner = proxy_image_link_opt_api(&data.banner, &context).await?;
 
   // Verify its a mod (only mods can edit it)
   check_community_mod_action(

crates/api_crud/src/site/create.rs

@@ -10,7 +10,7 @@ use lemmy_api_common::{
     local_site_rate_limit_to_rate_limit_config,
     local_site_to_slur_regex,
     process_markdown_opt,
-    proxy_image_link_opt,
+    proxy_image_link_opt_api,
   },
 };
 use lemmy_db_schema::{
@@ -59,8 +59,8 @@ pub async fn create_site(
 
   let slur_regex = local_site_to_slur_regex(&local_site);
   let sidebar = process_markdown_opt(&data.sidebar, &slur_regex, &context).await?;
-  let icon = proxy_image_link_opt(&data.icon, &context).await?;
-  let banner = proxy_image_link_opt(&data.banner, &context).await?;
+  let icon = proxy_image_link_opt_api(&data.icon, &context).await?;
+  let banner = proxy_image_link_opt_api(&data.banner, &context).await?;
 
   let site_form = SiteUpdateForm {
     name: Some(data.name.clone()),

crates/api_crud/src/site/update.rs

@@ -8,7 +8,7 @@ use lemmy_api_common::{
     local_site_rate_limit_to_rate_limit_config,
     local_site_to_slur_regex,
     process_markdown_opt,
-    proxy_image_link_opt,
+    proxy_image_link_opt_api,
   },
 };
 use lemmy_db_schema::{
@@ -62,8 +62,8 @@ pub async fn update_site(
 
   let slur_regex = local_site_to_slur_regex(&local_site);
   let sidebar = process_markdown_opt(&data.sidebar, &slur_regex, &context).await?;
-  let icon = proxy_image_link_opt(&data.icon, &context).await?;
-  let banner = proxy_image_link_opt(&data.banner, &context).await?;
+  let icon = proxy_image_link_opt_api(&data.icon, &context).await?;
+  let banner = proxy_image_link_opt_api(&data.banner, &context).await?;
 
   let site_form = SiteUpdateForm {
     name: data.name.clone(),

crates/apub/src/objects/comment.rs

@@ -161,7 +161,7 @@ impl Object for ApubComment {
 
     let local_site = LocalSite::read(&mut context.pool()).await.ok();
     let slur_regex = &local_site_opt_to_slur_regex(&local_site);
-    let content = process_markdown(&content, slur_regex, &context).await?;
+    let content = process_markdown(&content, slur_regex, context).await?;
     let language_id =
       LanguageTag::to_language_id_single(note.language, &mut context.pool()).await?;
 

crates/apub/src/objects/community.rs

@@ -23,6 +23,7 @@ use lemmy_api_common::{
     generate_outbox_url,
     local_site_opt_to_slur_regex,
     process_markdown_opt,
+    proxy_image_link_opt_apub,
   },
 };
 use lemmy_db_schema::{
@@ -142,7 +143,9 @@ impl Object for ApubCommunity {
     let local_site = LocalSite::read(&mut context.pool()).await.ok();
     let slur_regex = &local_site_opt_to_slur_regex(&local_site);
     let description = read_from_string_or_source_opt(&group.summary, &None, &group.source);
-    let description = process_markdown_opt(&description, slur_regex, &context).await?;
+    let description = process_markdown_opt(&description, slur_regex, context).await?;
+    let icon = proxy_image_link_opt_apub(group.icon.map(|i| i.url), context).await?;
+    let banner = proxy_image_link_opt_apub(group.image.map(|i| i.url), context).await?;
 
     let form = CommunityInsertForm {
       name: group.preferred_username.clone(),
@@ -159,8 +162,8 @@ impl Object for ApubCommunity {
       hidden: None,
       public_key: group.public_key.public_key_pem,
       last_refreshed_at: Some(naive_now()),
-      icon: group.icon.map(|i| i.url.into()),
-      banner: group.image.map(|i| i.url.into()),
+      icon,
+      banner,
       followers_url: Some(group.followers.clone().into()),
       inbox_url: Some(group.inbox.into()),
       shared_inbox_url: group.endpoints.map(|e| e.shared_inbox.into()),

crates/apub/src/objects/instance.rs

@@ -19,7 +19,7 @@ use activitypub_federation::{
 use chrono::{DateTime, Utc};
 use lemmy_api_common::{
   context::LemmyContext,
-  utils::{local_site_opt_to_slur_regex, process_markdown_opt},
+  utils::{local_site_opt_to_slur_regex, process_markdown_opt, proxy_image_link_opt_apub},
 };
 use lemmy_db_schema::{
   newtypes::InstanceId,
@@ -137,14 +137,16 @@ impl Object for ApubSite {
     let local_site = LocalSite::read(&mut context.pool()).await.ok();
     let slur_regex = &local_site_opt_to_slur_regex(&local_site);
     let sidebar = read_from_string_or_source_opt(&apub.content, &None, &apub.source);
-    let sidebar = process_markdown_opt(&sidebar, slur_regex, &context).await?;
+    let sidebar = process_markdown_opt(&sidebar, slur_regex, context).await?;
+    let icon = proxy_image_link_opt_apub(apub.icon.map(|i| i.url), context).await?;
+    let banner = proxy_image_link_opt_apub(apub.image.map(|i| i.url), context).await?;
 
     let site_form = SiteInsertForm {
       name: apub.name.clone(),
       sidebar,
       updated: apub.updated,
-      icon: apub.icon.clone().map(|i| i.url.into()),
-      banner: apub.image.clone().map(|i| i.url.into()),
+      icon,
+      banner,
       description: apub.summary,
       actor_id: Some(apub.id.clone().into()),
       last_refreshed_at: Some(naive_now()),

crates/apub/src/objects/person.rs

@@ -20,7 +20,12 @@ use activitypub_federation::{
 use chrono::{DateTime, Utc};
 use lemmy_api_common::{
   context::LemmyContext,
-  utils::{generate_outbox_url, local_site_opt_to_slur_regex, process_markdown_opt},
+  utils::{
+    generate_outbox_url,
+    local_site_opt_to_slur_regex,
+    process_markdown_opt,
+    proxy_image_link_opt_apub,
+  },
 };
 use lemmy_db_schema::{
   source::{
@@ -148,7 +153,9 @@ impl Object for ApubPerson {
     let local_site = LocalSite::read(&mut context.pool()).await.ok();
     let slur_regex = &local_site_opt_to_slur_regex(&local_site);
     let bio = read_from_string_or_source_opt(&person.summary, &None, &person.source);
-    let bio = process_markdown_opt(&bio, slur_regex, &context).await?;
+    let bio = process_markdown_opt(&bio, slur_regex, context).await?;
+    let avatar = proxy_image_link_opt_apub(person.icon.map(|i| i.url), context).await?;
+    let banner = proxy_image_link_opt_apub(person.image.map(|i| i.url), context).await?;
 
     // Some Mastodon users have `name: ""` (empty string), need to convert that to `None`
     // https://github.com/mastodon/mastodon/issues/25233
@@ -160,8 +167,8 @@ impl Object for ApubPerson {
       banned: None,
       ban_expires: None,
       deleted: Some(false),
-      avatar: person.icon.map(|i| i.url.into()),
-      banner: person.image.map(|i| i.url.into()),
+      avatar,
+      banner,
       published: person.published.map(Into::into),
       updated: person.updated.map(Into::into),
       actor_id: Some(person.id.into()),

crates/apub/src/objects/post.rs

@@ -237,7 +237,7 @@ impl Object for ApubPost {
       let slur_regex = &local_site_opt_to_slur_regex(&local_site);
 
       let body = read_from_string_or_source_opt(&page.content, &page.media_type, &page.source);
-      let body = process_markdown_opt(&body, slur_regex, &context).await?;
+      let body = process_markdown_opt(&body, slur_regex, context).await?;
       let language_id =
         LanguageTag::to_language_id_single(page.language, &mut context.pool()).await?;
 

crates/apub/src/objects/private_message.rs

@@ -128,7 +128,7 @@ impl Object for ApubPrivateMessage {
     let local_site = LocalSite::read(&mut context.pool()).await.ok();
     let slur_regex = &local_site_opt_to_slur_regex(&local_site);
     let content = read_from_string_or_source(&note.content, &None, &note.source);
-    let content = process_markdown(&content, slur_regex, &context).await?;
+    let content = process_markdown(&content, slur_regex, context).await?;
 
     let form = PrivateMessageInsertForm {
       creator_id: creator.id,

crates/utils/src/utils/markdown/mod.rs

@@ -42,6 +42,8 @@ pub fn markdown_rewrite_image_links(mut src: String) -> (String, Vec<Url>) {
   // Walk the syntax tree to find positions of image links
   ast.walk(|node, _depth| {
     if let Some(image) = node.cast::<Image>() {
+      // srcmap is always present for image
+      // https://github.com/markdown-it-rust/markdown-it/issues/36#issuecomment-1777844387
       let node_offsets = node.srcmap.expect("srcmap is none").get_byte_offsets();
       let start_offset = node_offsets.1 - image.url.len() - 1;
       let end_offset = node_offsets.1 - 1;