Add x-gitlab-feature-category header to startup gql calls

app/helpers/startupjs_helper.rb

@@ -5,6 +5,13 @@ module StartupjsHelper
     @graphql_startup_calls
   end
 
+  def page_startup_graphql_headers
+    {
+      'X-CSRF-Token' => form_authenticity_token,
+      'x-gitlab-feature-category' => ::Gitlab::ApplicationContext.current_context_attribute(:feature_category).presence || ''
+    }
+  end
+
   def add_page_startup_graphql_call(query, variables = {})
     @graphql_startup_calls ||= []
     file_location = File.join(Rails.root, "app/graphql/queries/#{query}.query.graphql")

app/views/layouts/_startup_js.html.haml

@@ -17,11 +17,14 @@
       });
     }
     if (gl.startup_graphql_calls && window.fetch) {
+      const headers = #{page_startup_graphql_headers.to_json};
       const url = `#{api_graphql_url}`
 
       const opts = {
         method: "POST",
-        headers: { "Content-Type": "application/json", 'X-CSRF-Token': "#{form_authenticity_token}" },
+        headers: {
+          "Content-Type": "application/json",
+          ...headers,
       };
 
       gl.startup_graphql_calls = gl.startup_graphql_calls.map(call => ({

spec/helpers/startupjs_helper_spec.rb

@@ -3,6 +3,8 @@
 require 'spec_helper'
 
 RSpec.describe StartupjsHelper do
+  using RSpec::Parameterized::TableSyntax
+
   describe '#page_startup_graphql_calls' do
     let(:query_location) { 'repository/path_last_commit' }
     let(:query_content) do
@@ -17,4 +19,24 @@ RSpec.describe StartupjsHelper do
       expect(startup_graphql_calls).to include({ query: query_content, variables: { ref: 'foo' } })
     end
   end
+
+  describe '#page_startup_graphql_headers' do
+    where(:csrf_token, :feature_category, :expected) do
+      'abc'       | 'web_ide' | { 'X-CSRF-Token' => 'abc', 'x-gitlab-feature-category' => 'web_ide' }
+      ''          | ''        | { 'X-CSRF-Token' => '', 'x-gitlab-feature-category' => '' }
+      'abc'       | nil       | { 'X-CSRF-Token' => 'abc', 'x-gitlab-feature-category' => '' }
+      'something' | '   '     | { 'X-CSRF-Token' => 'something', 'x-gitlab-feature-category' => '' }
+    end
+
+    with_them do
+      before do
+        allow(helper).to receive(:form_authenticity_token).and_return(csrf_token)
+        ::Gitlab::ApplicationContext.push(feature_category: feature_category)
+      end
+
+      it 'returns hash of headers for GraphQL requests' do
+        expect(helper.page_startup_graphql_headers).to eq(expected)
+      end
+    end
+  end
 end