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# -*- frozen-string-literal: true -*-
module Plum
# HTTP/1.x client session.
class LegacyClientSession
# Creates a new HTTP/1.1 client session
def initialize(socket, config)
require "http/parser"
@socket = socket
@config = config
@parser = setup_parser
@requests = []
@response = nil
@headers_callback = nil
end
def succ
@parser << @socket.readpartial(16384)
rescue => e # including HTTP::Parser::Error
fail(e)
end
def empty?
!@response
end
def close
@closed = true
@response._fail if @response
end
def request(headers, body, options, &headers_cb)
headers["host"] = headers[":authority"] || headers["host"] || @config[:hostname]
if body
if headers["content-length"] || headers["transfer-encoding"]
chunked = false
else
chunked = true
headers["transfer-encoding"] = "chunked"
end
end
response = Response.new
@requests << [response, headers, body, chunked, headers_cb]
consume_queue
response
end
private
def fail(exception)
close
raise exception
end
def consume_queue
return if @response || @requests.empty?
response, headers, body, chunked, cb = @requests.shift
@response = response
@headers_callback = cb
@socket << construct_request(headers)
if body
if chunked
read_object(body) { |chunk|
@socket << chunk.bytesize.to_s(16) << "\r\n" << chunk << "\r\n"
}
else
read_object(body) { |chunk| @socket << chunk }
end
end
end
def construct_request(headers)
out = String.new
out << "%s %s HTTP/1.1\r\n" % [headers[":method"], headers[":path"]]
headers.each { |key, value|
next if key.start_with?(":") # HTTP/2 psuedo headers
out << "%s: %s\r\n" % [key, value]
}
out << "\r\n"
end
def read_object(body)
if body.is_a?(String)
yield body
else # IO
until body.eof?
yield body.readpartial(1024)
end
end
end
def setup_parser
parser = HTTP::Parser.new
parser.on_headers_complete = proc {
resp_headers = parser.headers.map { |key, value| [key.downcase, value] }.to_h
@response._headers({ ":status" => parser.status_code.to_s }.merge(resp_headers))
@headers_callback.call(@response) if @headers_callback
}
parser.on_body = proc { |chunk|
@response._chunk(chunk)
}
parser.on_message_complete = proc { |env|
@response._finish
@response = nil
@headers_callback = nil
close unless parser.keep_alive?
consume_queue
}
parser
end
end
end
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