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require 'test/spec'
require 'rack/mock'
require 'rack/deflater'
require 'stringio'
require 'time' # for Time#httpdate
context "Rack::Deflater" do
def build_response(status, body, accept_encoding, headers = {})
app = lambda { |env| [status, {}, body] }
request = Rack::MockRequest.env_for("", headers.merge("HTTP_ACCEPT_ENCODING" => accept_encoding))
response = Rack::Deflater.new(app).call(request)
return response
end
specify "should be able to deflate bodies that respond to each" do
body = Object.new
class << body; def each; yield("foo"); yield("bar"); end; end
response = build_response(200, body, "deflate")
response[0].should.equal(200)
response[1].should.equal({ "Content-Encoding" => "deflate", "Vary" => "Accept-Encoding" })
response[2].to_s.should.equal("K\313\317OJ,\002\000")
end
# TODO: This is really just a special case of the above...
specify "should be able to deflate String bodies" do
response = build_response(200, "Hello world!", "deflate")
response[0].should.equal(200)
response[1].should.equal({ "Content-Encoding" => "deflate", "Vary" => "Accept-Encoding" })
response[2].to_s.should.equal("\363H\315\311\311W(\317/\312IQ\004\000")
end
specify "should be able to gzip bodies that respond to each" do
body = Object.new
class << body; def each; yield("foo"); yield("bar"); end; end
response = build_response(200, body, "gzip")
response[0].should.equal(200)
response[1].should.equal({ "Content-Encoding" => "gzip", "Vary" => "Accept-Encoding" })
io = StringIO.new(response[2].to_s)
gz = Zlib::GzipReader.new(io)
gz.read.should.equal("foobar")
gz.close
end
specify "should be able to fallback to no deflation" do
response = build_response(200, "Hello world!", "superzip")
response[0].should.equal(200)
response[1].should.equal({ "Vary" => "Accept-Encoding" })
response[2].should.equal("Hello world!")
end
specify "should be able to skip when there is no response entity body" do
response = build_response(304, [], "gzip")
response[0].should.equal(304)
response[1].should.equal({})
response[2].should.equal([])
end
specify "should handle the lack of an acceptable encoding" do
response1 = build_response(200, "Hello world!", "identity;q=0", "PATH_INFO" => "/")
response1[0].should.equal(406)
response1[1].should.equal({"Content-Type" => "text/plain"})
response1[2].should.equal(["An acceptable encoding for the requested resource / could not be found."])
response2 = build_response(200, "Hello world!", "identity;q=0", "SCRIPT_NAME" => "/foo", "PATH_INFO" => "/bar")
response2[0].should.equal(406)
response2[1].should.equal({"Content-Type" => "text/plain"})
response2[2].should.equal(["An acceptable encoding for the requested resource /foo/bar could not be found."])
end
specify "should handle gzip response with Last-Modified header" do
last_modified = Time.now.httpdate
app = lambda { |env| [200, { "Last-Modified" => last_modified }, "Hello World!"] }
request = Rack::MockRequest.env_for("", "HTTP_ACCEPT_ENCODING" => "gzip")
response = Rack::Deflater.new(app).call(request)
response[0].should.equal(200)
response[1].should.equal({ "Content-Encoding" => "gzip", "Vary" => "Accept-Encoding", "Last-Modified" => last_modified })
io = StringIO.new(response[2].to_s)
gz = Zlib::GzipReader.new(io)
gz.read.should.equal("Hello World!")
gz.close
end
specify "should do nothing when no-transform Cache-Control directive present" do
app = lambda { |env| [200, {'Cache-Control' => 'no-transform'}, ['Hello World!']] }
request = Rack::MockRequest.env_for("", "HTTP_ACCEPT_ENCODING" => "gzip")
response = Rack::Deflater.new(app).call(request)
response[0].should.equal(200)
response[1].should.not.include "Content-Encoding"
response[2].join.should.equal("Hello World!")
end
end
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