4 files changed, 52 insertions, 2 deletions
diff --git a/lib/carrier_wave_string_file.rb b/lib/carrier_wave_string_file.rb
new file mode 100644
index 00000000000..6c848902e4a
--- /dev/null
+++ b/lib/carrier_wave_string_file.rb
@@ -0,0 +1,5 @@
+class CarrierWaveStringFile < StringIO
+  def original_filename
+    ""
+  end
+end
diff --git a/lib/gitlab/ci/trace.rb b/lib/gitlab/ci/trace.rb
index baf55b1fa07..f2e5124c8a8 100644
--- a/lib/gitlab/ci/trace.rb
+++ b/lib/gitlab/ci/trace.rb
@@ -52,12 +52,14 @@ module Gitlab
       end
 
       def exist?
-        current_path.present? || old_trace.present?
+        trace_artifact&.exists? || current_path.present? || old_trace.present?
       end
 
       def read
         stream = Gitlab::Ci::Trace::Stream.new do
-          if current_path
+          if trace_artifact
+            trace_artifact.open
+          elsif current_path
             File.open(current_path, "rb")
           elsif old_trace
             StringIO.new(old_trace)
@@ -82,6 +84,8 @@ module Gitlab
       end
 
       def erase!
+        trace_artifact&.destroy
+
         paths.each do |trace_path|
           FileUtils.rm(trace_path, force: true)
         end
@@ -137,6 +141,10 @@ module Gitlab
           "#{job.id}.log"
         ) if job.project&.ci_id
       end
+
+      def trace_artifact
+        job.job_artifacts_trace
+      end
     end
   end
 end
diff --git a/lib/gitlab/git/lfs_pointer_file.rb b/lib/gitlab/git/lfs_pointer_file.rb
new file mode 100644
index 00000000000..da12ed7d125
--- /dev/null
+++ b/lib/gitlab/git/lfs_pointer_file.rb
@@ -0,0 +1,25 @@
+module Gitlab
+  module Git
+    class LfsPointerFile
+      def initialize(data)
+        @data = data
+      end
+
+      def pointer
+        @pointer ||= <<~FILE
+          version https://git-lfs.github.com/spec/v1
+          oid sha256:#{sha256}
+          size #{size}
+        FILE
+      end
+
+      def size
+        @size ||= @data.bytesize
+      end
+
+      def sha256
+        @sha256 ||= Digest::SHA256.hexdigest(@data)
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/workhorse.rb b/lib/gitlab/workhorse.rb
index b3f8b0d174d..823df67ea39 100644
--- a/lib/gitlab/workhorse.rb
+++ b/lib/gitlab/workhorse.rb
@@ -161,6 +161,18 @@ module Gitlab
         ]
       end
 
+      def send_url(url, allow_redirects: false)
+        params = {
+          'URL' => url,
+          'AllowRedirects' => allow_redirects
+        }
+
+        [
+          SEND_DATA_HEADER,
+          "send-url:#{encode(params)}"
+        ]
+      end
+
       def terminal_websocket(terminal)
         details = {
           'Terminal' => {