Class: Wsv::PathResolver

Inherits:
Object
  • Object
show all
Defined in:
lib/wsv/path_resolver.rb

Defined Under Namespace

Classes: Result

Instance Method Summary collapse

Constructor Details

#initialize(root) ⇒ PathResolver

Returns a new instance of PathResolver.



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# File 'lib/wsv/path_resolver.rb', line 41

def initialize(root)
  @root = root
end

Instance Method Details

#resolve(raw_path) ⇒ Object 



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# File 'lib/wsv/path_resolver.rb', line 45

def resolve(raw_path)
  decoded = decode(raw_path)
  return Result.error(400) unless decoded

  relative = decoded.sub(%r{\A/+}, "")
  return Result.error(403) if hidden_segment?(relative)

  candidate = File.expand_path(relative, @root)
  return Result.error(403) unless within?(candidate)
  return Result.error(404) unless File.exist?(candidate)

  real = File.realpath(candidate)
  return Result.error(403) unless within?(real)
  return Result.error(403) if hidden_under_root?(real)

  if File.directory?(real)
    return Result.redirect unless decoded.end_with?("/")

    index = File.join(real, "index.html")
    return Result.error(404) unless File.file?(index)

    return Result.file(index)
  end

  return Result.error(404) unless File.file?(real)

  Result.file(real)
rescue Errno::ENOENT, Errno::ELOOP, Errno::EACCES
  Result.error(404)
end