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| | # -*- encoding: binary -*-
# :enddoc:
# base module for evented models like Rev and EventMachine
module Rainbows::EvCore
include Rainbows::Const
include Rainbows::Response
G = Rainbows::G
NULL_IO = Unicorn::HttpRequest::NULL_IO
HttpParser = Unicorn::HttpParser
# Apps may return this Rack response: AsyncResponse = [ -1, {}, [] ]
ASYNC_CALLBACK = "async.callback".freeze
ASYNC_CLOSE = "async.close".freeze
def post_init
@env = {}
@hp = HttpParser.new
@state = :headers # [ :body [ :trailers ] ] :app_call :close
@buf = ""
end
# graceful exit, like SIGQUIT
def quit
@state = :close
end
def handle_error(e)
msg = Rainbows::Error.response(e) and write(msg)
ensure
quit
end
# returns whether to enable response chunking for autochunk models
def stream_response_headers(status, headers)
if headers['Content-Length']
rv = false
else
rv = !!(headers['Transfer-Encoding'] =~ %r{\Achunked\z}i)
rv = false if headers.delete('X-Rainbows-Autochunk') == 'no'
end
write(response_header(status, headers))
rv
end
# TeeInput doesn't map too well to this right now...
def on_read(data)
case @state
when :headers
@hp.headers(@env, @buf << data) or return
@state = :body
len = @hp.content_length
if len == 0
@input = NULL_IO
app_call # common case
else # nil or len > 0
# since we don't do streaming input, we have no choice but
# to take over 100-continue handling from the Rack application
if @env[HTTP_EXPECT] =~ /\A100-continue\z/i
write(EXPECT_100_RESPONSE)
@env.delete(HTTP_EXPECT)
end
@input = CapInput.new(len, self)
@hp.filter_body(@buf2 = "", @buf)
@input << @buf2
on_read("")
end
when :body
if @hp.body_eof?
@state = :trailers
on_read(data)
elsif data.size > 0
@hp.filter_body(@buf2, @buf << data)
@input << @buf2
on_read("")
end
when :trailers
if @hp.trailers(@env, @buf << data)
@input.rewind
app_call
end
end
rescue => e
handle_error(e)
end
class CapInput < Struct.new(:io, :client, :bytes_left)
MAX_BODY = Unicorn::Const::MAX_BODY
TmpIO = Unicorn::TmpIO
def self.err(client, msg)
client.write(Rainbows::Const::ERROR_413_RESPONSE)
client.quit
# zip back up the stack
raise IOError, msg, []
end
def self.new(len, client)
max = Rainbows.max_bytes
if len
if max && (len > max)
err(client, "Content-Length too big: #{len} > #{max}")
end
len <= MAX_BODY ? StringIO.new("") : TmpIO.new
else
max ? super(TmpIO.new, client, max) : TmpIO.new
end
end
def <<(buf)
if (self.bytes_left -= buf.size) < 0
io.close
CapInput.err(client, "chunked request body too big")
end
io << buf
end
def gets; io.gets; end
def each(&block); io.each(&block); end
def size; io.size; end
def rewind; io.rewind; end
def read(*args); io.read(*args); end
end
end
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