Include expires_in for LFS authentication payload

When using git-lfs with SSH we weren't passing in
the expires_header header which is allows large
transfers to succeed in the event the current
default of 30 mins expires.

https://github.com/git-lfs/git-lfs/blob/master/docs/api/server-discovery.md#ssh

changelogs/unreleased/57353-git-push-fails-on-large-lfs-files-where-the-push-take-a-long-time.yml

+---
+title: Provide expires_in in LFS authentication payload
+merge_request: 25082
+author:
+type: fixed

lib/api/internal.rb

@@ -117,7 +117,7 @@ module API
           raise ActiveRecord::RecordNotFound.new("No key_id or user_id passed!")
         end
 
-        Gitlab::LfsToken.new(actor).for_gitlab_shell(project.http_url_to_repo)
+        Gitlab::LfsToken.new(actor).authentication_payload(project.http_url_to_repo)
       end
       # rubocop: enable CodeReuse/ActiveRecord
 

lib/gitlab/lfs_token.rb

@@ -47,11 +47,12 @@ module Gitlab
       user? ? :lfs_token : :lfs_deploy_token
     end
 
-    def for_gitlab_shell(repository_http_path)
+    def authentication_payload(repository_http_path)
       {
         username: actor_name,
         lfs_token: token,
-        repository_http_path: repository_http_path
+        repository_http_path: repository_http_path,
+        expires_in: DEFAULT_EXPIRE_TIME
       }
     end
 

spec/lib/gitlab/lfs_token_spec.rb

@@ -227,17 +227,17 @@ describe Gitlab::LfsToken, :clean_gitlab_redis_shared_state do
     end
   end
 
-  describe '#for_gitlab_shell' do
-    let(:actor) { create(:user) }
-    let(:lfs_token) { described_class.new(actor) }
-    let(:repo_http_path) { 'http://localhost/user/repo.git' }
-
-    it 'returns a Hash desgined for gitlab-shell' do
-      hash = lfs_token.for_gitlab_shell(repo_http_path)
-
-      expect(hash[:username]).to eq(actor.username)
-      expect(hash[:repository_http_path]).to eq(repo_http_path)
-      expect(hash[:lfs_token]).to be_a String
+  describe '#authentication_payload' do
+    it 'returns a Hash designed for gitlab-shell' do
+      actor = create(:user)
+      lfs_token = described_class.new(actor)
+      repo_http_path = 'http://localhost/user/repo.git'
+      authentication_payload = lfs_token.authentication_payload(repo_http_path)
+
+      expect(authentication_payload[:username]).to eq(actor.username)
+      expect(authentication_payload[:repository_http_path]).to eq(repo_http_path)
+      expect(authentication_payload[:lfs_token]).to be_a String
+      expect(authentication_payload[:expires_in]).to eq(described_class::DEFAULT_EXPIRE_TIME)
     end
   end
 end

spec/requests/api/internal_spec.rb

@@ -167,6 +167,7 @@ describe API::Internal do
         expect(response).to have_gitlab_http_status(200)
         expect(json_response['username']).to eq(user.username)
         expect(json_response['repository_http_path']).to eq(project.http_url_to_repo)
+        expect(json_response['expires_in']).to eq(Gitlab::LfsToken::DEFAULT_EXPIRE_TIME)
         expect(Gitlab::LfsToken.new(key).token_valid?(json_response['lfs_token'])).to be_truthy
       end