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| | # -*- encoding: binary -*-
module Rainbows
# base class for Rainbows concurrency models
module Base
include Unicorn
include Rainbows::Const
# write a response without caring if it went out or not for error
# messages.
# TODO: merge into Unicorn::HttpServer
def emergency_response(client, response_str)
client.write_nonblock(response_str) rescue nil
client.close rescue nil
end
# once a client is accepted, it is processed in its entirety here
# in 3 easy steps: read request, call app, write app response
def process_client(client)
buf = client.readpartial(CHUNK_SIZE)
hp = HttpParser.new
env = {}
remote_addr = TCPSocket === client ? client.peeraddr.last : LOCALHOST
begin # loop
Thread.current[:t] = Time.now
while ! hp.headers(env, buf)
buf << client.readpartial(CHUNK_SIZE)
end
env[RACK_INPUT] = 0 == hp.content_length ?
HttpRequest::NULL_IO :
Unicorn::TeeInput.new(client, env, hp, buf)
env[REMOTE_ADDR] = remote_addr
response = app.call(env.update(RACK_DEFAULTS))
if 100 == response.first.to_i
client.write(EXPECT_100_RESPONSE)
env.delete(HTTP_EXPECT)
response = app.call(env)
end
out = [ hp.keepalive? ? CONN_ALIVE : CONN_CLOSE ] if hp.headers?
HttpResponse.write(client, response, out)
end while hp.keepalive? and hp.reset.nil? and env.clear
client.close
# if we get any error, try to write something back to the client
# assuming we haven't closed the socket, but don't get hung up
# if the socket is already closed or broken. We'll always ensure
# the socket is closed at the end of this function
rescue EOFError,Errno::ECONNRESET,Errno::EPIPE,Errno::EINVAL,Errno::EBADF
emergency_response(client, ERROR_500_RESPONSE)
rescue HttpParserError # try to tell the client they're bad
buf.empty? or emergency_response(client, ERROR_400_RESPONSE)
rescue Object => e
emergency_response(client, ERROR_500_RESPONSE)
logger.error "Read error: #{e.inspect}"
logger.error e.backtrace.join("\n")
end
def self.included(klass)
klass.const_set :LISTENERS, HttpServer::LISTENERS
end
end
end
|