http://web.archive.org/web/20110529023841/http://devblog.muziboo.com/2008/06/17/attachment-fu-sanitize-filename-regex-and-unicode-gotcha/“rel=“nofollow noreferer” http://web.archive.org/web/20110529023841/http://devblog.muziboo.com/2008/06/17/attachment-fu-sanitize-filename-regex-and-unicode-gotcha/:

def sanitize_filename(filename)
  returning filename.strip do |name|
   # NOTE: File.basename doesn t work right with Windows paths on Unix
   # get only the filename, not the whole path
   name.gsub!(/^.*(\|/)/,   )

   # Strip out the non-ascii character
   name.gsub!(/[^0-9A-Za-z.-]/,  _ )
  end
end

我愿建议一种不同于旧的解决办法。 注:旧代码使用deprecated>。 顺便说一句,它向铁路(<>/strong>)倾斜,你在问题(仅作为tag)中明确提到铁路。 此外,现有的解决办法未能按照你的要求将<代码>.doc.pdf并入_doc.pdf。 当然,这并没有使强调崩溃。

我的解决办法是:

def sanitize_filename(filename)
  # Split the name when finding a period which is preceded by some
  # character, and is followed by some character other than a period,
  # if there is no following period that is followed by something
  # other than a period (yeah, confusing, I know)
  fn = filename.split /(?<=.).(?=[^.])(?!.*.[^.])/m

  # We now have one or two parts (depending on whether we could find
  # a suitable period). For each of these parts, replace any unwanted
  # sequence of characters with an underscore
  fn.map! { |s| s.gsub /[^a-z0-9-]+/i,  _  }

  # Finally, join the parts with a period and return the result
  return fn.join  . 
end

您没有具体说明有关转换的所有细节。 因此,我提出以下假设:

• There should be at most one filename extension, which means that there should be at most one period in the filename
• Trailing periods do not mark the start of an extension
• Leading periods do not mark the start of an extension
• Any sequence of characters beyond A–Z, a–z, 0–9 and - should be collapsed into a single _ (i.e. underscore is itself regarded as a disallowed character, and the string $%__°# would become _ – rather than ___ from the parts $% , __ and °# )

其复杂部分是,我把档案名称分为主要部分和延伸部分。 在定期表达的帮助下,我搜索了最后一段时期,之后是一段时期之外的东西,因此,在一段时期里没有达到同样的标准。 然而,在进行之前,必须具有某种特性,以确保它不至于扼杀的第一个特性。

我测试了这一职能:

1.9.3p125 :006 > sanitize_filename  my§document$is°°   very&interesting___thisIs%nice445.doc.pdf 
 => "my_document_is_very_interesting_thisIs_nice445_doc.pdf"

我认为,这是你的要求。 我希望这够了。

在铁路方面,你还可以使用ActiveStorage:Filename#sanitized:

ActiveStorage::Filename.new("foo:bar.jpg").sanitized # => "foo-bar.jpg"
ActiveStorage::Filename.new("foo/bar.jpg").sanitized # => "foo-bar.jpg"

如果你使用铁路,你也可以使用Sting#paraileize。 这不是特别打算这样做的,但你将获得满意的结果。

"my§document$is°°   very&interesting___thisIs%nice445.doc.pdf".parameterize

铁路 我发现自己想保留任何档案延期,但使用<编码>参数,以达到其余性质:

filename = "my§doc$is°° very&itng___thsIs%nie445.doc.pdf"
cleaned = filename.split(".").map(&:parameterize).join(".")

执行细节和想法见来源:https://github.com/rails/blob/master/support/active/inflector/transmol.rb。

def parameterize(string, separator: "-", preserve_case: false)
  # Turn unwanted chars into the separator.
  parameterized_string.gsub!(/[^a-z0-9-_]+/i, separator)
  #... some more stuff
end

如果你的目标只是产生一个在所有业务系统中使用“安全”的档案名称(而不是去除任何和所有非ASCII特性),那么我就建议zaru gem。 它没有做原始问题所具体规定的一切,但所制作的档案名称应当安全使用(并且仍然保持任何档案名称-安全单编码特性不受影响):

Zaru.sanitize! "  whatēver//wëird:user:înput:"
# => "whatēverwëirduserînput"
Zaru.sanitize! "my§docu*ment$is°°   very&interes:ting___thisIs%nice445.doc.pdf" 
# => "my§document$is°° very&interesting___thisIs%nice445.doc.pdf"

有一个可能有用的图书馆,特别是如果你有兴趣以ASCII取代超编的统法协会密码:unidecode 。

irb(main):001:0> require  unidecoder 
=> true
irb(main):004:0> "Grzegżółka".to_ascii
=> "Grzegzolka"