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# frozen_string_literal: true
require_relative 'helper'
describe Rack::Chunked do
def chunked(app)
proc do |env|
app = Rack::Chunked.new(app)
response = Rack::Lint.new(app).call(env)
# we want to use body like an array, but it only has #each
response[2] = response[2].to_enum.to_a
response
end
end
before do
@env = Rack::MockRequest.
env_for('/', 'SERVER_PROTOCOL' => 'HTTP/1.1', 'REQUEST_METHOD' => 'GET')
end
class TrailerBody
def each(&block)
['Hello', ' ', 'World!'].each(&block)
end
def trailers
{ "Expires" => "tomorrow" }
end
end
it 'yields trailer headers after the response' do
app = lambda { |env|
[200, { "Content-Type" => "text/plain", "Trailer" => "Expires" }, TrailerBody.new]
}
response = Rack::MockResponse.new(*chunked(app).call(@env))
response.headers.wont_include 'Content-Length'
response.headers['Transfer-Encoding'].must_equal 'chunked'
response.body.must_equal "5\r\nHello\r\n1\r\n \r\n6\r\nWorld!\r\n0\r\nExpires: tomorrow\r\n\r\n"
end
it 'chunk responses with no Content-Length' do
app = lambda { |env| [200, { "Content-Type" => "text/plain" }, ['Hello', ' ', 'World!']] }
response = Rack::MockResponse.new(*chunked(app).call(@env))
response.headers.wont_include 'Content-Length'
response.headers['Transfer-Encoding'].must_equal 'chunked'
response.body.must_equal "5\r\nHello\r\n1\r\n \r\n6\r\nWorld!\r\n0\r\n\r\n"
end
it 'chunks empty bodies properly' do
app = lambda { |env| [200, { "Content-Type" => "text/plain" }, []] }
response = Rack::MockResponse.new(*chunked(app).call(@env))
response.headers.wont_include 'Content-Length'
response.headers['Transfer-Encoding'].must_equal 'chunked'
response.body.must_equal "0\r\n\r\n"
end
it 'chunks encoded bodies properly' do
body = ["\uFFFEHello", " ", "World"].map {|t| t.encode("UTF-16LE") }
app = lambda { |env| [200, { "Content-Type" => "text/plain" }, body] }
response = Rack::MockResponse.new(*chunked(app).call(@env))
response.headers.wont_include 'Content-Length'
response.headers['Transfer-Encoding'].must_equal 'chunked'
response.body.encoding.to_s.must_equal "ASCII-8BIT"
response.body.must_equal "c\r\n\xFE\xFFH\x00e\x00l\x00l\x00o\x00\r\n2\r\n \x00\r\na\r\nW\x00o\x00r\x00l\x00d\x00\r\n0\r\n\r\n".dup.force_encoding("BINARY")
response.body.must_equal "c\r\n\xFE\xFFH\x00e\x00l\x00l\x00o\x00\r\n2\r\n \x00\r\na\r\nW\x00o\x00r\x00l\x00d\x00\r\n0\r\n\r\n".dup.force_encoding(Encoding::BINARY)
end
it 'not modify response when Content-Length header present' do
app = lambda { |env|
[200, { "Content-Type" => "text/plain", 'Content-Length' => '12' }, ['Hello', ' ', 'World!']]
}
status, headers, body = chunked(app).call(@env)
status.must_equal 200
headers.wont_include 'Transfer-Encoding'
headers.must_include 'Content-Length'
body.join.must_equal 'Hello World!'
end
it 'not modify response when client is HTTP/1.0' do
app = lambda { |env| [200, { "Content-Type" => "text/plain" }, ['Hello', ' ', 'World!']] }
@env['SERVER_PROTOCOL'] = 'HTTP/1.0'
status, headers, body = chunked(app).call(@env)
status.must_equal 200
headers.wont_include 'Transfer-Encoding'
body.join.must_equal 'Hello World!'
end
it 'not modify response when client is ancient, pre-HTTP/1.0' do
app = lambda { |env| [200, { "Content-Type" => "text/plain" }, ['Hello', ' ', 'World!']] }
check = lambda do
status, headers, body = chunked(app).call(@env.dup)
status.must_equal 200
headers.wont_include 'Transfer-Encoding'
body.join.must_equal 'Hello World!'
end
@env.delete('SERVER_PROTOCOL') # unicorn will do this on pre-HTTP/1.0 requests
check.call
@env['SERVER_PROTOCOL'] = 'HTTP/0.9' # not sure if this happens in practice
check.call
end
it 'not modify response when Transfer-Encoding header already present' do
app = lambda { |env|
[200, { "Content-Type" => "text/plain", 'Transfer-Encoding' => 'identity' }, ['Hello', ' ', 'World!']]
}
status, headers, body = chunked(app).call(@env)
status.must_equal 200
headers['Transfer-Encoding'].must_equal 'identity'
body.join.must_equal 'Hello World!'
end
[100, 204, 304].each do |status_code|
it "not modify response when status code is #{status_code}" do
app = lambda { |env| [status_code, {}, []] }
status, headers, _ = chunked(app).call(@env)
status.must_equal status_code
headers.wont_include 'Transfer-Encoding'
end
end
end
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