1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
| | # -*- encoding: binary -*-
require "zlib"
# allows storing pre-deflated data on disk and serving it
# as-is for clients that accept that deflate encoding
module Metropolis::Deflate
include Metropolis::Constants
Compression = "deflate"
def get(key, env)
status, headers, body = r = super
if 200 == status && /\bdeflate\b/ !~ env[HTTP_ACCEPT_ENCODING]
inflater = Zlib::Inflate.new(-Zlib::MAX_WBITS)
body[0] = inflater.inflate(body[0]) << inflater.finish
inflater.end
headers[Content_Length] = body[0].size.to_s
headers.delete(Content_Encoding)
headers.delete(Vary)
end
r
end
def put(key, env)
Wrapper.new(env) if Compression != env[HTTP_CONTENT_ENCODING]
super(key, env)
end
def self.extended(obj)
obj.instance_eval do
@headers[Content_Encoding] = Compression
@headers[Vary] = Accept_Encoding
end
end
class Wrapper < Metropolis::InputWrapper
def read_all
deflater = Zlib::Deflate.new(
Zlib::DEFAULT_COMPRESSION,
# drop the zlib header which causes both Safari and IE to choke
-Zlib::MAX_WBITS,
Zlib::DEF_MEM_LEVEL,
Zlib::DEFAULT_STRATEGY
)
deflater.deflate(@input.read) << deflater.finish
end
end
end
|