add option for content_disposition (#24)

README.md

@@ -32,6 +32,7 @@ CarrierWave.configure do |config|
   config.gcloud_bucket                       = 'your-bucket-name'
   config.gcloud_bucket_is_public             = true
   config.gcloud_authenticated_url_expiration = 600
+  config.gcloud_content_disposition          = 'attachment' // or you can skip this
   
   config.gcloud_attributes = {
     expires: 600

lib/carrierwave-google-storage.rb

@@ -17,6 +17,7 @@ class Base
       add_config :gcloud_bucket_is_public
       add_config :gcloud_credentials
       add_config :gcloud_authenticated_url_expiration
+      add_config :gcloud_content_disposition
 
       configure do |config|
         config.storage_engines[:gcloud] = 'CarrierWave::Storage::Gcloud'

lib/carrierwave/storage/gcloud_file.rb

@@ -8,7 +8,7 @@ class GcloudFile
       attr_writer :file
       attr_accessor :uploader, :connection, :path, :gcloud_options, :file_exists
 
-      delegate :content_type, :size, to: :file
+      delegate :content_disposition, :content_type, :size, to: :file
 
       def initialize(uploader, connection, path)
         @uploader   = uploader
@@ -60,7 +60,10 @@ def read
       def store(new_file)
         new_file_path = uploader.filename ? uploader.filename : new_file.filename
         bucket_file = bucket.create_file(
-          new_file.path, path, content_type: new_file.content_type
+          new_file.path,
+          path,
+          content_type: new_file.content_type,
+          content_disposition: uploader.gcloud_content_disposition
         )
         bucket_file.acl.public! if uploader.gcloud_bucket_is_public
         self

spec/features/storing_files_spec.rb

@@ -105,6 +105,7 @@ def filename
 
     before(:each) do
       uploader.gcloud_bucket_is_public = false
+      uploader.gcloud_content_disposition = 'attachment'
       uploader.store!(image)
       uploader.retrieve_from_store!('image3.png')
     end
@@ -126,6 +127,7 @@ def filename
 
       expect(uploader.file.content_type).to eq('image/png')
       expect(uploader.file.filename).to eq('image3.png')
+      expect(uploader.file.content_disposition).to eq('attachment')
 
       image.close
       uploader.file.delete