Class: Utopia::Static::LocalFile

Inherits:
Object
  • Object
show all
Defined in:
lib/utopia/static/local_file.rb

Overview

Represents a local file on disk which can be served directly, or passed upstream to sendfile.

Constant Summary collapse

CONTENT_LENGTH = 
Rack::CONTENT_LENGTH
CONTENT_RANGE = 
'Content-Range'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(root, path) ⇒ LocalFile

Returns a new instance of LocalFile.



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# File 'lib/utopia/static/local_file.rb', line 14

def initialize(root, path)
	@root = root
	@path = path
	@etag = Digest::SHA1.hexdigest("#{File.size(full_path)}#{mtime_date}")

	@range = nil
end

Instance Attribute Details

#etag ⇒ Object (readonly)

Returns the value of attribute etag.



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# File 'lib/utopia/static/local_file.rb', line 24

def etag
  @etag
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/utopia/static/local_file.rb', line 23

def path
  @path
end

#range ⇒ Object (readonly)

Returns the value of attribute range.



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# File 'lib/utopia/static/local_file.rb', line 25

def range
  @range
end

#root ⇒ Object (readonly)

Returns the value of attribute root.



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# File 'lib/utopia/static/local_file.rb', line 22

def root
  @root
end

Instance Method Details

#bytesize ⇒ Object Also known as: size 



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# File 'lib/utopia/static/local_file.rb', line 40

def bytesize
	File.size(full_path)
end

#each ⇒ Object 



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# File 'lib/utopia/static/local_file.rb', line 51

def each
	File.open(full_path, "rb") do |file|
		file.seek(@range.begin)
		remaining = @range.end - @range.begin+1

		while remaining > 0
			break unless part = file.read([8192, remaining].min)

			remaining -= part.length

			yield part
		end
	end
end

#empty? ⇒ Boolean

This reflects whether calling each would yield anything.

Returns:

  • (Boolean) 


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# File 'lib/utopia/static/local_file.rb', line 45

def empty?
	bytesize == 0
end

#full_path ⇒ Object 



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# File 'lib/utopia/static/local_file.rb', line 32

def full_path
	File.join(@root, @path.components)
end

#modified?(env) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/utopia/static/local_file.rb', line 66

def modified?(env)
	if modified_since = env['HTTP_IF_MODIFIED_SINCE']
		return false if File.mtime(full_path) <= Time.parse(modified_since)
	end

	if etags = env['HTTP_IF_NONE_MATCH']
		etags = etags.split(/\s*,\s*/)
		return false if etags.include?(etag) || etags.include?('*')
	end

	return true
end

#mtime_date ⇒ Object 



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# File 'lib/utopia/static/local_file.rb', line 36

def mtime_date
	File.mtime(full_path).httpdate
end

#serve(env, response_headers) ⇒ Object 



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# File 'lib/utopia/static/local_file.rb', line 82

def serve(env, response_headers)
	ranges = Rack::Utils.get_byte_ranges(env['HTTP_RANGE'], size)
	response = [200, response_headers, self]

	# puts "Requesting ranges: #{ranges.inspect} (#{size})"

	if ranges == nil or ranges.size != 1
		# No ranges, or multiple ranges (which we don't support).
		# TODO: Support multiple byte-ranges, for now just send entire file:
		response[0] = 200
		response[1][CONTENT_LENGTH] = size.to_s
		@range = 0...size
	else
		# Partial content:
		@range = ranges[0]
		partial_size = @range.size
		
		response[0] = 206
		response[1][CONTENT_LENGTH] = partial_size.to_s
		response[1][CONTENT_RANGE] = "bytes #{@range.min}-#{@range.max}/#{size}"
	end
	
	return response
end

#to_path ⇒ Object

Fit in with Rack::Sendfile



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# File 'lib/utopia/static/local_file.rb', line 28

def to_path
	full_path
end