Catch possible Addressable::URI::InvalidURIError

changelogs/unreleased/57227-absolute-uri-missing-hierarchical-segment.yml

+---
+title: Fix potential Addressable::URI::InvalidURIError
+merge_request: 24908
+author:
+type: fixed

lib/banzai/filter/autolink_filter.rb

@@ -114,7 +114,11 @@ module Banzai
         # Since this came from a Text node, make sure the new href is encoded.
         # `commonmarker` percent encodes the domains of links it handles, so
         # do the same (instead of using `normalized_encode`).
-        href_safe = Addressable::URI.encode(match).html_safe
+        begin
+          href_safe = Addressable::URI.encode(match).html_safe
+        rescue Addressable::URI::InvalidURIError
+          return uri.to_s
+        end
 
         html_safe_match = match.html_safe
         options         = link_options.merge(href: href_safe)

spec/lib/banzai/filter/autolink_filter_spec.rb

@@ -121,6 +121,13 @@ describe Banzai::Filter::AutolinkFilter do
       expect(doc.to_s).to eq("See #{link}")
     end
 
+    it 'does not autolink bad URLs after we remove trailing punctuation' do
+      link = 'http://]'
+      doc = filter("See #{link}")
+
+      expect(doc.to_s).to eq("See #{link}")
+    end
+
     it 'does not include trailing punctuation' do
       ['.', ', ok?', '...', '?', '!', ': is that ok?'].each do |trailing_punctuation|
         doc = filter("See #{link}#{trailing_punctuation}")