Rails 4 - Paperclip - 使用DATA URI上传图像

时间:2014-08-27 07:31:38

标签: ruby-on-rails image paperclip uri data-uri

我的问题是,我使用Rails 4和paperclip处理图像上传到我的amazon s3服务器。 但是,我想允许用户使用他们自己的网络摄像头拍照而不是选择硬盘上的现有文件。

当我拍摄图片时,我得到的结果是图片数据URI

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAUAAAAFACAYAAADNkKWqAAAgAElEQVR4nDS7RXNj6bpuW/98xzkRZ8Paa62irMx0ZpptMTOzNMXMzAyWzGnNOW5DdRsOufFJzREPvb/wmkN6KiM9lhCf60gvbaTnJryUkF6LSE8FpLc00nME8SmF+FSEfQppHUF8LMA6i7SqIh36SA8FpHUUHlJIuwLsKkjzBGwCiNsAx6kDFkbEhQFx7EOcCEjrCNIsiDgKwFMZHrJIyzSsikjTKtJ8COs+H/M40tyEtAud3kwrSJsmx2EEaRFCnMVP31vGYGFHWl0ibe6Q9mHEcRpmRaRVDWkRg53A+yzI28ADDwXEWRhxZkRa+GGd5ufQizQLcpwKsC3DqoA0zSKN84jDLNI4wUfPiTR0w9yGNLYhTSOIkwofozzHeYqnoYOPmQ9pKiCOUjAt8d7OIc7CvPQdLMsqNjU1bwMnT10Pm6oPcZTivelkU5bx3FLwWLrlqXzJR+UcsSXnpani0FTzWFXy3DBxqMV46wq8tG3s8gr2RTPHZpxjNcax7ua9YuNQ0PNaM/He9PJUj/DaSPNU8/NStvNY9vBWcfNYMPBU1vBaM/NQMPFYsrNKaThUbOyqHhYFE5OMiklKyaZgZJYysipa2Nf8TJMeNsUA04KCSfYzg8QnVoVbVtkfTEP/YJv+k33uC5vUX8yFL+wKd4ziX5mk/6If/0I/fsM8b2AoKBnGTPQSDkYpFwPBwDStYVvVMcpc0o1c0BcUdGMaBnENVf8Z7fAZy6yKmaBkmpCzTt2zTHxmI1yyS2jZJdy85EJMo1YGUQ0TQcs0amKT9NKLKOgJl7SFc+rCJd2Mi27CRyfpo532U015KCbstNIWWuFresIdPUFLP+6gGbij7PxEP2qi4bAwCUfphRN0Qn46gp5+7IZe/IZeVMks4mPk9TCLuGmH9HSiZto+AwOfm14wRjcUoRH0UA2aybvkDDJmujEDNa+MbkhDx6+kFTDRibioh0yUg3JqYT15j4aqz0TeJSPvPSfv/UoroqQZ0lEPKmlELsn5/pNq4P/QCf0/Wt7f6Xr0dPxmWl4tBfsnMo7fyHjOyDn/Im35nWbknqxXTsFnpBt3UHHe0/Bekrf/k4LzK82AjIr7jGbgG1WfhozbRtLnI2EzUvbekzf9QcH8nZrzmpb7hpL7G0nHn+ScZxRt38kZP1F3fqfsvKDkuCduOCdrOads+0rJ8hcF8xkVxzVp0xkx3Tfylu8UjP9FVv8f5B1XJIwKyk4tWccVUf2/iBn+Tcz0mW7MTMZ8Rkr1n5RU/6BqOCetPiNm+I2g6v8S1/0XKeOvFIx/Ebv8D/KG/yVn/hdJ9T

我的问题是:如何在我的图像控制器中使用paperclip基于该数据URI上传该图像?

有没有办法可以将DATA URI直接传递给我的控制器,回形针会处理它吗? 或者我是否必须创建和编写临时文件来重建图像,然后将其传递给回形针?

非常感谢!!

1 个答案:

答案 0 :(得分:4)

Paperclip#io_adapters.for将尝试为作业找到合适的适配器,在本例中为Paperclip::DataUriAdapter。您当然也可以直接使用Paperclip::DataUriAdapter

def save_data_uri_to_attachment(data_uri)    

  # Instantiates Paperclip::DataUriAdapter attachment
  file = Paperclip.io_adapters.for(data_uri)
  file.original_filename = name

  # Save the model  
  model.attachment = file
  model.save!
end

来源:https://stackoverflow.com/a/28036282/545017