Rails：文件名中的 image_tag 助手/元音变音会在生产中引发错误

发布于 2024-12-04 18:15:52 字数 662 浏览 1 评论 0原文

我正在 Heroku 上的 Rails 3 应用程序中通过 dragonfly 上传文件名包含元音变音的图像。然后我尝试使用在开发中显示图像，

image_tag @model.image.url, …

一切正常，但在生产中我得到：

incompatible character encodings: UTF-8 and ASCII-8BIT
.bundle/gems/ruby/1.9.1/gems/actionpack-3.0.7/lib/action_view/helpers/tag_helper.rb:129:in `*'

阅读了一些内容后，我

Encoding.default_external = Encoding::UTF_8
Encoding.default_internal = Encoding::UTF_8

在 environment.rb 中添加了内容，但问题仍然存在。

解决这个问题的正确方法是什么？上传时我必须修正文件名吗？我的印象是这在 Rails 3 中应该可以正常工作？

原文

I am uploading an image with a file name containing an umlaut via dragonfly in a Rails 3 app on Heroku. Then I'm trying to display the image using

image_tag @model.image.url, …

In development everything works just fine, but in production I'm getting:

incompatible character encodings: UTF-8 and ASCII-8BIT
.bundle/gems/ruby/1.9.1/gems/actionpack-3.0.7/lib/action_view/helpers/tag_helper.rb:129:in `*'

After reading a bit I've added

Encoding.default_external = Encoding::UTF_8
Encoding.default_internal = Encoding::UTF_8

in environment.rb but the problem remains.

What is the proper way to go about this? Do I have to fix the file name when uploading? I was under the impression this should work just fine in Rails 3?

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舂唻埖巳落 2024-12-11 18:15:52

好吧，您可以尝试类似 url.force_encoding('utf8')

您也可以在将模型保存到数据库之前简单地清理模型中的 url - 这就是我所做的。是的，我有时也会在最奇怪的地方偶然发现这一点。

这就是我的模型的样子：

# encoding: UTF-8
class Page < ActiveRecord::Base
  before_save :sanitize_title

  private
  def sanitize_title
    self.title = self.title.force_encoding('UTF-8').downcase.gsub(/[ \-äöüß]/, ' ' => '_', '-' => '_', 'ä' => 'ae', 'ö' => 'oe', 'ü' => 'ue', 'ß' => 'ss').gsub(/[^a-z_]/,'')
  end
end

这将用 ASCII 对应项替换德语变音符号，将空格转换为下划线并删除其他所有内容。
第一行 #encoding: UTF-8 很重要，否则 ruby 会抱怨 model.rb 文件中存在非 ASCII 字符...

Well, you could try something like url.force_encoding('utf8')

You could also simply sanitize the url in the model before saving it to the database - that's what I did. And, yes, I sometimes stumble over this in the weirdest places, too.

This is what my model looked like:

# encoding: UTF-8
class Page < ActiveRecord::Base
  before_save :sanitize_title

  private
  def sanitize_title
    self.title = self.title.force_encoding('UTF-8').downcase.gsub(/[ \-äöüß]/, ' ' => '_', '-' => '_', 'ä' => 'ae', 'ö' => 'oe', 'ü' => 'ue', 'ß' => 'ss').gsub(/[^a-z_]/,'')
  end
end

This will replace the German umlaute with their ASCII counterparts, convert spaces to underscores and drop everything else.
The first line # encoding: UTF-8 is important or ruby will complain of non-ASCII characters in the model.rb file...

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寒冷纷飞旳雪 2024-12-11 18:15:52

除了 @Rhywden 的答案之外，这里还有我针对 Dragonfly 的解决方案：

image_accessor :image do :after_assign
  after_assign{|i| i.name = sanitize_filename(image.name) }
end

def sanitize_filename(filename)
  filename.strip.tap do |name|
    name.sub! /\A.*(\\|\/)/, ''
    name.gsub! /[^\w\.\-]/, '_'
  end
end

详细信息请参见 http://markevans .github.com/dragonfly/file.Models.html 和此处 http://guides.rubyonrails.org/security.html#file-uploads 。

In addition to @Rhywden's answer, here my solution specific for Dragonfly:

image_accessor :image do :after_assign
  after_assign{|i| i.name = sanitize_filename(image.name) }
end

def sanitize_filename(filename)
  filename.strip.tap do |name|
    name.sub! /\A.*(\\|\/)/, ''
    name.gsub! /[^\w\.\-]/, '_'
  end
end

Details here http://markevans.github.com/dragonfly/file.Models.html and here http://guides.rubyonrails.org/security.html#file-uploads .

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