1 files changed, 30 insertions, 1 deletions
diff --git a/app/models/ci/artifact_blob.rb b/app/models/ci/artifact_blob.rb
index b35febc9ac5..ec56cc53aea 100644
--- a/app/models/ci/artifact_blob.rb
+++ b/app/models/ci/artifact_blob.rb
@@ -2,6 +2,8 @@ module Ci
   class ArtifactBlob
     include BlobLike
 
+    EXTENSIONS_SERVED_BY_PAGES = %w[.html .htm .txt .json].freeze
+
     attr_reader :entry
 
     def initialize(entry)
@@ -17,6 +19,7 @@ module Ci
     def size
       entry.metadata[:size]
     end
+    alias_method :external_size, :size
 
     def data
       "Build artifact #{path}"
@@ -30,6 +33,32 @@ module Ci
       :build_artifact
     end
 
-    alias_method :external_size, :size
+    def external_url(project, job)
+      return unless external_link?(job)
+
+      full_path_parts = project.full_path_components
+      top_level_group = full_path_parts.shift
+
+      artifact_path = [
+        '-', *full_path_parts, '-',
+        'jobs', job.id,
+        'artifacts', path
+      ].join('/')
+
+      "#{pages_config.protocol}://#{top_level_group}.#{pages_config.host}/#{artifact_path}"
+    end
+
+    def external_link?(job)
+      pages_config.enabled &&
+        pages_config.artifacts_server &&
+        EXTENSIONS_SERVED_BY_PAGES.include?(File.extname(name)) &&
+        job.project.public?
+    end
+
+    private
+
+    def pages_config
+      Gitlab.config.pages
+    end
   end
 end