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|
# -*- frozen-string-literal: true -*-
module Plum
class Client
DEFAULT_CONFIG = {
https: true
}.freeze
attr_reader :host, :port, :config
attr_reader :socket
def self.start(host, port, config = {}, &block)
client = self.new(host, port, config)
client.start(&block)
end
def initialize(host, port, config = {})
@host = host
@port = port
@config = DEFAULT_CONFIG.merge(config)
@response_handlers = {}
@responses = {}
end
def start
raise IOError, "Session already started" if @started
_start
if block_given?
begin
ret = yield(self)
wait
return ret
ensure
close
end
end
self
end
def wait
while !@responses.empty?
_succ
end
end
def close
begin
@plum.close if @plum
ensure
@socket.close if @socket
end
end
def request_async(headers, body = nil, &block)
stream = @plum.open_stream
response = Response.new
@responses[stream] = response
if body
stream.send_headers(headers, end_stream: false)
stream.send_data(body, end_stream: true)
else
stream.send_headers(headers, end_stream: true)
end
if block_given?
@response_handlers[stream] = block
end
response
end
def request(headers, body = nil)
response = request_async(headers, body)
_succ while !response.finished?
response
end
%w(GET POST HEAD PUT DELETE).each { |method|
define_method(method.downcase.to_sym) do |headers = {}|
request(headers)
end
define_method(:"#{method.downcase}_async") do |headers = {}, &block|
request_async(headers, &block)
end
}
def https?
!!@config[:https]
end
private
def _start
@started = true
sock = TCPSocket.open(host, port)
if https?
ctx = @config[:ssl_context] || new_ssl_ctx
sock = OpenSSL::SSL::SSLSocket.new(sock, ctx)
sock.sync_close = true
sock.connect
if ctx.verify_mode != OpenSSL::SSL::VERIFY_NONE
sock.post_connection_check(@config[:hostname] || @host)
end
end
@socket = sock
@plum = setup_plum(sock)
end
def setup_plum(sock)
local_settings = {
enable_push: 0,
initial_window_size: (1 << 30) - 1,
}
plum = ClientConnection.new(sock.method(:write), local_settings)
plum.on(:protocol_error) { |ex| raise ex }
plum.on(:stream_error) { |stream, ex| raise ex }
plum.on(:headers) { |stream, headers|
response = @responses[stream]
response._headers(headers)
}
plum.on(:data) { |stream, chunk|
response = @responses[stream]
response._chunk(chunk)
}
plum.on(:end_stream) { |stream|
response = @responses.delete(stream)
response._finish
if handler = @response_handlers.delete(stream)
handler.call(response)
end
}
plum
end
def _succ
@plum << @socket.readpartial(1024)
end
def new_ssl_ctx
ctx = OpenSSL::SSL::SSLContext.new
ctx.ssl_version = :TLSv1_2
if ctx.respond_to?(:hostname=)
ctx.hostname = @config[:hostname] || @host
end
if ctx.respond_to?(:alpn_protocols)
ctx.alpn_protocols = ["h2", "http/1.1"]
end
if ctx.respond_to?(:npn_select_cb)
ctx.alpn_select_cb = -> protocols {
protocols.include?("h2") ? "h2" : protocols.first
}
end
ctx
end
end
end
|
