Configurable outcomes service protocol

refs OUT-3591

flag=none

test plan:
  - qa-cr

Change-Id: I3d21717cc8dcae686989c66b9a39ab7e45426354
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/234728
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Michael Brewer-Davis <mbd@instructure.com>
Reviewed-by: Pat Renner <prenner@instructure.com>
QA-Review: Brian Watson <bwatson@instructure.com>
Product-Review: Augusto Callejas <acallejas@instructure.com>

app/helpers/canvas_outcomes_helper.rb

@@ -22,7 +22,7 @@ module CanvasOutcomesHelper
     domain, jwt = extract_domain_jwt(context.root_account, 'outcome_alignment_sets.create')
     return if domain.nil? || jwt.nil?
 
-    _, protocol = get_host_and_protocol_from_request()
+    protocol = ENV.fetch('OUTCOMES_SERVICE_PROTOCOL', Rails.env.production? ? 'https' : 'http')
     host_url = "#{protocol}://#{domain}" if domain.present?
 
     js_env(

spec/helpers/canvas_outcomes_helper_spec.rb

@@ -34,25 +34,47 @@ describe CanvasOutcomesHelper do
   end
 
   describe '#set_outcomes_alignment_js_env' do
+    let(:wiki_page) { create_page title: "title text", body: "body text" }
+
     it 'raises error on invalid artifact type' do
       expect { subject.set_outcomes_alignment_js_env(account, account, {}) }.to raise_error('Unsupported artifact type: Account')
     end
 
-    it 'sets js_env values' do
-      wiki_page = create_page title: "title text", body: "body text"
-      expect(subject).to receive(:extract_domain_jwt).and_return ['domain', 'jwt']
-      expect(subject).to receive(:get_host_and_protocol_from_request).and_return ['host', 'https']
-      expect(subject).to receive(:js_env).with({
-        canvas_outcomes: {
-          artifact_type: 'canvas.page',
-          artifact_id: wiki_page.id,
-          context_uuid: account.uuid,
-          host: 'https://domain',
-          jwt: 'jwt',
-          extra_key: 'extra_value'
-        }
-      })
-      subject.set_outcomes_alignment_js_env(wiki_page, account, extra_key: 'extra_value')
+    shared_examples_for 'valid js_env settings' do
+      it 'sets js_env values' do
+        expect(subject).to receive(:extract_domain_jwt).and_return ['domain', 'jwt']
+        expect(subject).to receive(:js_env).with({
+          canvas_outcomes: {
+            artifact_type: 'canvas.page',
+            artifact_id: wiki_page.id,
+            context_uuid: account.uuid,
+            host: expected_host,
+            jwt: 'jwt',
+            extra_key: 'extra_value'
+          }
+        })
+        subject.set_outcomes_alignment_js_env(wiki_page, account, extra_key: 'extra_value')
+      end
+    end
+
+    context 'without overriding protocol' do
+      let(:expected_host) { 'http://domain' }
+
+      it_behaves_like 'valid js_env settings'
+    end
+
+    context 'overriding protocol' do
+      let(:expected_host) { 'https://domain' }
+
+      before do
+        ENV['OUTCOMES_SERVICE_PROTOCOL'] = 'https'
+      end
+
+      after do
+        ENV.delete('OUTCOMES_SERVICE_PROTOCOL')
+      end
+
+      it_behaves_like 'valid js_env settings'
     end
   end