Uploading image remotely using Rails 5 and Carrierwave

By : Herm
Source: Stackoverflow.com
Question!

When trying to remotely upload an image via Carrierwave and Rails 5, I'm presented with an encoding error:

Encoding::UndefinedConversionError - "\x89" from ASCII-8BIT to UTF-8

I have looked at this answer as well as the activesupport-json_encoder gem suggested by the answer, but no luck. The gem does not support rails 5 yet it would seem.

My form is a normal multipart rails form that looks like this:

= bootstrap_form_for @image, url: members_profile_path(current_user), remote: true, html: {  multipart: true } do |f|  
  = f.file_field :attachment
  = f.button "Save"

The field that contains the image, is called 'attachment'. In my controller my code looks like this:

def create_profile_image
  respond_to do |format|
    @image.entity_id = current_user.id
    if @image.validate(params[ :image ])
      @image.save
      format.json { render json: @image, status: :ok }
    else
      format.json { render json: @image.errors, status: :unprocessable_entity }
    end
  end
end

I'm using the reform gem to handle permitted params. I have made sure to allow the attachment param. Furthermore, I have also added the Remotipart gem to simplify remote file uploads via Rails.

Any ideas why I might be presented with this error?

UPDATE

This is what I can see in my log:

Started POST "/api/v1/private/members/profiles/94/create_profile_image" for 127.0.0.1 at 2016-09-17 17:58:06 +0200
Processing by Api::V1::Private::Members::ProfilesController#create_profile_image as JSON
  Parameters: {"utf8"=>"?", "image"=>{"attachment_cache"=>"", "attachment"=>#<ActionDispatch::Http::UploadedFile:0x007fce2adb25b8 @tempfile=#<Tempfile:/var/folders/f0/7p7mh8fj2rj18b49ysfvkgb40000gn/T/RackMultipart20160917-2713-rey3nb.png>, @original_filename="imageedit_3_8650415599.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"image[attachment]\"; filename=\"imageedit_3_8650415599.png\"\r\nContent-Type: image/png\r\n">}, "button"=>"", "remotipart_submitted"=>"true", "authenticity_token"=>"f7M86L+Xisve4pNwcniTy3QaUWakL0sMtODLDkEf6Q7kGXZGCHY3rbPYe0jzPFIVjS/k0Gv4M2csoAQ7cuzMgQ==", "X-Requested-With"=>"IFrame", "X-Http-Accept"=>"application/json, text/javascript, */*; q=0.01", "id"=>"94"}
  [1m[36mUser Load (1.3ms)[0m  [1m[34mSELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2[0m  [["id", 94], ["LIMIT", 1]]
  [1m[36mUser Load (0.3ms)[0m  [1m[34mSELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2[0m  [["id", 94], ["LIMIT", 1]]
  [1m[35m (1.1ms)[0m  [1m[34mSELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'super_admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'company') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))[0m  [["user_id", 94]]
  [1m[35m (0.3ms)[0m  [1m[35mBEGIN[0m
  [1m[35m (0.2ms)[0m  [1m[31mROLLBACK[0m
Completed 500 Internal Server Error in 31ms (ActiveRecord: 3.1ms)



Encoding::UndefinedConversionError - "\x89" from ASCII-8BIT to UTF-8:
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  /Users/hermannharris/.rbenv/versions/2.3.1/lib/ruby/2.3.0/json/common.rb:224:in `generate'
  /Users/hermannharris/.rbenv/versions/2.3.1/lib/ruby/2.3.0/json/common.rb:224:in `generate'
  activesupport (5.0.0) lib/active_support/json/encoding.rb:99:in `stringify'
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  /Users/hermannharris/.rbenv/versions/2.3.1/lib/ruby/2.3.0/set.rb:306:in `each_key'
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  rack (2.0.1) lib/rack/conditional_get.rb:38:in `call'
  rack (2.0.1) lib/rack/head.rb:12:in `call'
   () Users/hermannharris/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/bundler/gems/remotipart-7f7989db5729/lib/remotipart/middleware.rb:32:in `call'
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  actionpack (5.0.0) lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call'
  rack-contrib (1.2.0) lib/rack/contrib/response_headers.rb:17:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/headers.rb:16:in `call'
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  railties (5.0.0) lib/rails/rack/logger.rb:24:in `call'
  sprockets-rails (3.1.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
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  puma (3.6.0) lib/puma/configuration.rb:225:in `call'
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  puma (3.6.0) lib/puma/server.rb:415:in `process_client'
  puma (3.6.0) lib/puma/server.rb:275:in `block in run'
  puma (3.6.0) lib/puma/thread_pool.rb:116:in `block in spawn_thread'
By : Herm


Answers

Downgrade bson to 3.1.1 in your Gemfile.

It may help you.



You can try to install activesupport-json_encoder gem from github fork, which supports rails 5.

gem 'activesupport-json_encoder', git:'https://github.com/kongregate/activesupport-json_encoder.git', branch: 'rails-5.0'


Encode params[:image] into UTF-8 using, force_encoding("UTF-8")

By : APS


This video can help you solving your question :)
By: admin