Rails邮件图像附件从数据uri

Question

我已经保存了一个签名，该签名以图像数据uri, png的形式存储在我的数据库中。

当发送电子邮件时，我想将其附加在内联，但图像一直显示为在Gmail中不工作。下面是我的代码:

梅勒:

attachments.inline['signature'] = {
  content: @project_addition.signature.split(',')[1],
  mime_type: 'image/png',
  encoding: 'base64'
}

视图:

<%= image_tag attachments.inline['signature'].url, width: '25%' %>

字符串的前几个字符:

"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABowAAAC4CA....

Answer 1

如果您没有图像数据uri，另一个解决方案是在您的帮助器

中的方法下面

app/帮助/email_helper.rb

  def email_data_uri(image, **options)
    code = File.open("#{Rails.root}/app/assets/images/#{image}", 'r').read
    data = Base64.strict_encode64(code)
    type = image.split('.')[-1]
    name = image.split('/')[-1]
    attachments.inline[name] = {
      content: Base64.decode64(data),
      mime_type: "image/#{type}"
    }
    image_tag attachments.inline[name].url, **options
  end

应用程序/视图/campaign_mailer

= email_data_uri 'email/livechat-logo.png', style: 'width: 34px'

添加样式选项

Answer 2

您需要调用Base64.decode64来解码base64编码的内容，而不指定编码

attachments.inline['signature'] = {
  content: Base64.decode64(@project_addition.signature.split(',')[1]),
  mime_type: 'image/png'
}