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| | # -*- encoding: binary -*-
# :enddoc:
# Writes a Rack response to your client using the HTTP/1.1 specification.
# You use it by simply doing:
#
# status, headers, body = rack_app.call(env)
# http_response_write(socket, status, headers, body)
#
# Most header correctness (including Content-Length and Content-Type)
# is the job of Rack, with the exception of the "Date" and "Status" header.
module Unicorn::HttpResponse
# Every standard HTTP code mapped to the appropriate message.
CODES = Rack::Utils::HTTP_STATUS_CODES.inject({}) { |hash,(code,msg)|
hash[code] = "#{code} #{msg}"
hash
}
CRLF = "\r\n"
def err_response(code, response_start_sent)
"#{response_start_sent ? '' : 'HTTP/1.1 '}#{CODES[code]}\r\n\r\n"
end
# writes the rack_response to socket as an HTTP response
def http_response_write(socket, status, headers, body,
response_start_sent=false)
status = CODES[status.to_i] || status
hijack = nil
http_response_start = response_start_sent ? '' : 'HTTP/1.1 '
if headers
buf = "#{http_response_start}#{status}\r\n" \
"Date: #{httpdate}\r\n" \
"Status: #{status}\r\n" \
"Connection: close\r\n"
headers.each do |key, value|
case key
when %r{\A(?:Date\z|Connection\z)}i
next
when "rack.hijack"
# this was an illegal key in Rack < 1.5, so it should be
# OK to silently discard it for those older versions
hijack = hijack_prepare(value)
else
if value =~ /\n/
# avoiding blank, key-only cookies with /\n+/
buf << value.split(/\n+/).map! { |v| "#{key}: #{v}\r\n" }.join
else
buf << "#{key}: #{value}\r\n"
end
end
end
socket.write(buf << CRLF)
end
if hijack
body = nil # ensure we do not close body
hijack.call(socket)
else
body.each { |chunk| socket.write(chunk) }
end
ensure
body.respond_to?(:close) and body.close
end
# Rack 1.5.0 (protocol version 1.2) adds response hijacking support
if ((Rack::VERSION[0] << 8) | Rack::VERSION[1]) >= 0x0102
def hijack_prepare(value)
value
end
else
def hijack_prepare(_)
end
end
end
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