Use content_disposition gem for :content_disposition create_multipart_upload option

README.md

@@ -280,14 +280,15 @@ options: {
 In that case a [`Rack::Request`] object is also passed to the block. The
 initial request to `POST /s3/multipart` will contain `type` and `filename`
 query parameters, so for example you could use that to make requesting the URL
-later force a download with the original filename:
+later force a download with the original filename (using the
+[content_disposition] gem):
 
 ```rb
 options: {
   create_multipart_upload: -> (request) do
     filename = request.params["filename"]
 
-    { content_disposition: "attachment; filename=\"#{CGI.escape(filename)}\"" }
+    { content_disposition: ContentDisposition.attachment(filename) }
   end
 }
 ```
@@ -477,6 +478,7 @@ License](https://opensource.org/licenses/MIT).
 [Adding Direct S3 Uploads]: https://github.com/shrinerb/shrine/wiki/Adding-Direct-S3-Uploads
 [Minio]: https://minio.io/
 [Client]: #client
+[content_disposition]: https://github.com/shrinerb/content_disposition
 [`Rack::Request`]: https://www.rubydoc.info/github/rack/rack/master/Rack/Request
 [`Aws::S3::Client#initialize`]: https://docs.aws.amazon.com/sdk-for-ruby/v3/api/Aws/S3/Client.html#initialize-instance_method
 [`Aws::S3::Client#create_multipart_upload`]: https://docs.aws.amazon.com/sdk-for-ruby/v3/api/Aws/S3/Client.html#create_multipart_upload-instance_method

lib/uppy/s3_multipart/app.rb

 require "uppy/s3_multipart/client"
 
 require "roda"
+require "content_disposition"
 
 require "securerandom"
-require "cgi"
 
 module Uppy
   module S3Multipart
@@ -40,8 +40,7 @@ module Uppy
             key       = SecureRandom.hex + extension
             key       = "#{opts[:prefix]}/#{key}" if opts[:prefix]
 
-            # CGI-escape the filename because aws-sdk's signature calculator trips on special characters
-            content_disposition = "inline; filename=\"#{CGI.escape(filename)}\"" if filename
+            content_disposition = ContentDisposition.inline(filename) if filename
 
             options = { content_type: content_type, content_disposition: content_disposition }
             options[:acl] = "public-read" if opts[:public]

test/app_test.rb

@@ -49,8 +49,10 @@ describe Uppy::S3Multipart::App do
     it "handles 'filename' JSON body parameter" do
       response = app.post "/s3/multipart", json: { filename: "nature.jpg" }
 
-      assert_equal :create_multipart_upload,          @s3.api_requests[0][:operation_name]
-      assert_equal "inline; filename=\"nature.jpg\"", @s3.api_requests[0][:params][:content_disposition]
+      expected_content_disposition = %(inline; filename="nature.jpg"; filename*=UTF-8''nature.jpg)
+
+      assert_equal :create_multipart_upload,     @s3.api_requests[0][:operation_name]
+      assert_equal expected_content_disposition, @s3.api_requests[0][:params][:content_disposition]
 
       assert_match /^\w{32}\.jpg$/, response.body_json["key"]
     end

uppy-s3_multipart.gemspec

 Gem::Specification.new do |gem|
-  gem.name          = "uppy-s3_multipart"
-  gem.version       = "0.2.0"
+  gem.name         = "uppy-s3_multipart"
+  gem.version      = "0.2.0"
 
   gem.required_ruby_version = ">= 2.2"
 
@@ -15,6 +15,7 @@ Gem::Specification.new do |gem|
 
   gem.add_dependency "roda", ">= 2.27", "< 4"
   gem.add_dependency "aws-sdk-s3", "~> 1.0"
+  gem.add_dependency "content_disposition", "~> 1.0"
 
   gem.add_development_dependency "rake"
   gem.add_development_dependency "minitest"