Class: Rack::File

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/file.rb,
lib/rack/sendfile.rb

Overview

:nodoc:

Constant Summary collapse

F =
::File

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(root) ⇒ File

Returns a new instance of File.


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# File 'lib/rack/file.rb', line 20

def initialize(root)
  @root = root
end

Instance Attribute Details

#pathObject Also known as: to_path

Returns the value of attribute path


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# File 'lib/rack/file.rb', line 16

def path
  @path
end

#rootObject

Returns the value of attribute root


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# File 'lib/rack/file.rb', line 15

def root
  @root
end

Instance Method Details

#_call(env) ⇒ Object


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# File 'lib/rack/file.rb', line 30

def _call(env)
  @path_info = Utils.unescape(env["PATH_INFO"])
  return forbidden  if @path_info.include? ".."

  @path = F.join(@root, @path_info)

  begin
    if F.file?(@path) && F.readable?(@path)
      serving
    else
      raise Errno::EPERM
    end
  rescue SystemCallError
    not_found
  end
end

#call(env) ⇒ Object


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# File 'lib/rack/file.rb', line 24

def call(env)
  dup._call(env)
end

#eachObject


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# File 'lib/rack/file.rb', line 84

def each
  F.open(@path, "rb") { |file|
    while part = file.read(8192)
      yield part
    end
  }
end

#forbiddenObject


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# File 'lib/rack/file.rb', line 47

def forbidden
  body = "Forbidden\n"
  [403, {"Content-Type" => "text/plain",
         "Content-Length" => body.size.to_s,
         "X-Cascade" => "pass"},
   [body]]
end

#not_foundObject


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# File 'lib/rack/file.rb', line 76

def not_found
  body = "File not found: #{@path_info}\n"
  [404, {"Content-Type" => "text/plain",
     "Content-Length" => body.size.to_s,
     "X-Cascade" => "pass"},
   [body]]
end

#servingObject

NOTE:

We check via File::size? whether this file provides size info
via stat (e.g. /proc files often don't), otherwise we have to
figure it out by reading the whole file into memory. And while
we're at it we also use this as body then.

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# File 'lib/rack/file.rb', line 61

def serving
  if size = F.size?(@path)
    body = self
  else
    body = [F.read(@path)]
    size = Utils.bytesize(body.first)
  end

  [200, {
    "Last-Modified"  => F.mtime(@path).httpdate,
    "Content-Type"   => Mime.mime_type(F.extname(@path), 'text/plain'),
    "Content-Length" => size.to_s
  }, body]
end