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-rw-r--r--app/lib/activitypub/tag_manager.rb4
-rw-r--r--app/services/activitypub/fetch_remote_status_service.rb1
-rw-r--r--app/services/activitypub/process_collection_service.rb3
3 files changed, 8 insertions, 0 deletions
diff --git a/app/lib/activitypub/tag_manager.rb b/app/lib/activitypub/tag_manager.rb
index 908ea9639..95d1cf9f3 100644
--- a/app/lib/activitypub/tag_manager.rb
+++ b/app/lib/activitypub/tag_manager.rb
@@ -86,6 +86,8 @@ class ActivityPub::TagManager
   end
 
   def local_uri?(uri)
+    return false if uri.nil?
+
     uri  = Addressable::URI.parse(uri)
     host = uri.normalized_host
     host = "#{host}:#{uri.port}" if uri.port
@@ -99,6 +101,8 @@ class ActivityPub::TagManager
   end
 
   def uri_to_resource(uri, klass)
+    return if uri.nil?
+
     if local_uri?(uri)
       case klass.name
       when 'Account'
diff --git a/app/services/activitypub/fetch_remote_status_service.rb b/app/services/activitypub/fetch_remote_status_service.rb
index 930fbad1f..b6c00a9e7 100644
--- a/app/services/activitypub/fetch_remote_status_service.rb
+++ b/app/services/activitypub/fetch_remote_status_service.rb
@@ -34,6 +34,7 @@ class ActivityPub::FetchRemoteStatusService < BaseService
   end
 
   def trustworthy_attribution?(uri, attributed_to)
+    return false if uri.nil? || attributed_to.nil?
     Addressable::URI.parse(uri).normalized_host.casecmp(Addressable::URI.parse(attributed_to).normalized_host).zero?
   end
 
diff --git a/app/services/activitypub/process_collection_service.rb b/app/services/activitypub/process_collection_service.rb
index eb93329e9..79cdca297 100644
--- a/app/services/activitypub/process_collection_service.rb
+++ b/app/services/activitypub/process_collection_service.rb
@@ -45,5 +45,8 @@ class ActivityPub::ProcessCollectionService < BaseService
 
   def verify_account!
     @account = ActivityPub::LinkedDataSignature.new(@json).verify_account!
+  rescue JSON::LD::JsonLdError => e
+    Rails.logger.debug "Could not verify LD-Signature for #{value_or_id(@json['actor'])}: #{e.message}"
+    nil
   end
 end