Rails Carrierwave Base64图像上传
使用Carrierwave将图像从客户端上传到Rails后端的最佳方法是什么？ 现在我们的iOS开发人员将文件作为base64发送，所以请求如下：
"image_data"=>"/9j/4AAQSkZJRgABAQAAAQABAAD/4QBYRXhpZgAATU0AKgAAAAgAAgESAAMAAAABAAEAAIdpAAQAAAABAAAAJgAAAAAAA6ABAAMAAAABAAEAAKACAAQAAAABAAAAHqADAAQAAAABAAAAHgAAAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/2wBDAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/wAARCAAeAB4DAREAAhEBAxEB/8QAHwAAAQUBAQE.... 所以，我的问题实际上是两个问题。 我应该告诉他发送不同的文件格式吗？ 如果base64是发送这些文件的正确方法，那么我如何在carrierwave中处理它们？
我认为一种解决方案可以是将解码后的数据保存到文件中，然后将此文件分配给已安装的上传器。 然后摆脱那个文件。
另一个（内存中）解决方案可以是这个：
# define class that extends IO with methods that are required by carrierwave class CarrierStringIO < StringIO def original_filename # the real name does not matter "photo.jpeg" end def content_type # this should reflect real content type, but for this example it's ok "image/jpeg" end end # some model with carrierwave uploader class SomeModel # the uploader mount_uploader :photo, PhotoUploader # this method will be called during standard assignment in your controller # (like `update_attributes`) def image_data=(data) # decode data and create stream on them io = CarrierStringIO.new(Base64.decode64(data)) # this will do the thing (photo is mounted carrierwave uploader) self.photo = io end end
您可以使用Carrierwave-base64 Gem轻松实现这一点，您无需自己处理数据，您只需添加gem并更改模型
mount_uploader :file, FileUploader
至
mount_base64_uploader :file, FileUploader
就是这样，现在你可以很容易地说：
Attachment.create(file: params[:file])
老问题，但我不得不做类似的事情，从base64字符串上传图像，通过json请求传递。 这就是我最终做的事情：
#some_controller.rb def upload_image set_resource image = get_resource.decode_base64_image params[:image_string] begin if image && get_resource.update(avatar: image) render json: get_resource else render json: {success: false, message: "Failed to upload image. Please try after some time."} end ensure image.close image.unlink end end #some_model.rb def decode_base64_image(encoded_file) decoded_file = Base64.decode64(encoded_file) file = Tempfile.new(['image','.jpg']) file.binmode file.write decoded_file return file end