Add direct upload support to GCS service

lib/active_storage/service/gcs_service.rb

@@ -53,6 +53,17 @@ def url(key, expires_in:, disposition:, filename:)
     end
   end
 
+  def url_for_direct_upload(key, expires_in:, content_type:, content_length:)
+    instrument :url, key do |payload|
+      generated_url = bucket.signed_url key, method: "PUT", expires: expires_in,
+        content_type: content_type
+
+      payload[:url] = generated_url
+
+      generated_url
+    end
+  end
+
   private
     def file_for(key)
       bucket.file(key)

test/direct_uploads_controller_test.rb

@@ -7,7 +7,7 @@
 require "active_storage/direct_uploads_controller"
 
 if SERVICE_CONFIGURATIONS[:s3]
-  class ActiveStorage::DirectUploadsControllerTest < ActionController::TestCase
+  class ActiveStorage::S3DirectUploadsControllerTest < ActionController::TestCase
     setup do
       @blob = create_blob
       @routes = Routes
@@ -32,5 +32,35 @@ class ActiveStorage::DirectUploadsControllerTest < ActionController::TestCase
     end
   end
 else
-  puts "Skipping Direct Upload tests because no S3 configuration was supplied"
+  puts "Skipping S3 Direct Upload tests because no S3 configuration was supplied"
+end
+
+if SERVICE_CONFIGURATIONS[:gcs]
+  class ActiveStorage::GCSDirectUploadsControllerTest < ActionController::TestCase
+    setup do
+      @blob = create_blob
+      @routes = Routes
+      @controller = ActiveStorage::DirectUploadsController.new
+      @config = SERVICE_CONFIGURATIONS[:gcs]
+
+      @old_service = ActiveStorage::Blob.service
+      ActiveStorage::Blob.service = ActiveStorage::Service.configure(:gcs, SERVICE_CONFIGURATIONS)
+    end
+
+    teardown do
+      ActiveStorage::Blob.service = @old_service
+    end
+
+    test "creating new direct upload" do
+      post :create, params: { blob: {
+          filename: "hello.txt", byte_size: 6, checksum: Digest::MD5.base64digest("Hello"), content_type: "text/plain" } }
+
+      details = JSON.parse(@response.body)
+
+      assert_match %r{storage\.googleapis\.com/#{@config[:bucket]}}, details["url"]
+      assert_equal "hello.txt", GlobalID::Locator.locate_signed(details["sgid"]).filename.to_s
+    end
+  end
+else
+  puts "Skipping GCS Direct Upload tests because no GCS configuration was supplied"
 end

test/service/gcs_service_test.rb

 require "service/shared_service_tests"
+require "httparty"
 
 if SERVICE_CONFIGURATIONS[:gcs]
   class ActiveStorage::Service::GCSServiceTest < ActiveSupport::TestCase
@@ -6,6 +7,25 @@ class ActiveStorage::Service::GCSServiceTest < ActiveSupport::TestCase
 
     include ActiveStorage::Service::SharedServiceTests
 
+    test "direct upload" do
+      begin
+        key = SecureRandom.base58(24)
+        data = "Something else entirely!"
+        direct_upload_url = @service.url_for_direct_upload(key, expires_in: 5.minutes, content_type: "text/plain", content_length: data.size)
+
+        HTTParty.put(
+          direct_upload_url,
+          body: data,
+          headers: { "Content-Type" => "text/plain" },
+          debug_output: STDOUT
+        )
+
+        assert_equal data, @service.download(key)
+      ensure
+        @service.delete key
+      end
+    end
+
     test "signed URL generation" do
       travel_to Time.now do
         url = SERVICE.bucket.signed_url(FIXTURE_KEY, expires: 120) +