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|
module Bundler
class Settings
class Mirrors
def initialize(prober = nil)
@all = Mirror.new
@prober = prober || TCPSocketProbe.new
@mirrors = Hash.new
end
def for(uri)
if @all.validate!(@prober).valid?
@all
else
fetch_valid_mirror_for(AbsoluteURI.normalize(uri))
end
end
def each
@mirrors.each do |k, v|
yield k, v.uri.to_s
end
end
def parse(key, value)
config = MirrorConfig.new(key, value)
if config.all?
mirror = @all
else
mirror = (@mirrors[config.uri] = @mirrors[config.uri] || Mirror.new)
end
config.update_mirror(mirror)
end
private
def fetch_valid_mirror_for(uri)
mirror = (@mirrors[uri] || Mirror.new(uri)).validate!(@prober)
mirror = Mirror.new(uri) unless mirror.valid?
mirror
end
end
class Mirror
DEFAULT_FALLBACK_TIMEOUT = 0.1
attr_reader :uri, :fallback_timeout
def initialize(uri = nil, fallback_timeout = 0)
self.uri = uri
self.fallback_timeout = fallback_timeout
@valid = nil
end
def uri=(uri)
@uri = if uri.nil?
uri = nil
else
URI(uri.to_s)
end
@valid = nil
end
def fallback_timeout=(timeout)
case timeout
when true, "true"
@fallback_timeout = DEFAULT_FALLBACK_TIMEOUT
when false, "false"
@fallback_timeout = 0
else
@fallback_timeout = timeout.to_i
end
@valid = nil
end
def ==(o)
o != nil && self.uri == o.uri && self.fallback_timeout == o.fallback_timeout
end
def valid?
return false if @uri.nil?
return @valid unless @valid.nil?
false
end
def validate!(probe = nil)
@valid = false if uri.nil?
if @valid.nil?
@valid = fallback_timeout == 0 || (probe || TCPSocketProbe.new).replies?(self)
end
self
end
end
private
class MirrorConfig
attr_accessor :uri, :value
def initialize(config_line, value)
uri, fallback =
config_line.match(/^mirror\.(all|.+?)(\.fallback_timeout)?\/?$/).captures
@fallback = !fallback.nil?
@all = false
if uri == "all"
@all = true
else
@uri = AbsoluteURI.normalize(uri)
end
@value = value
end
def all?
@all
end
def update_mirror(mirror)
if @fallback
mirror.fallback_timeout = @value
else
mirror.uri = AbsoluteURI.normalize(@value)
end
end
end
class TCPSocketProbe
def replies?(mirror)
MirrorSocket.new(mirror).with_socket do |socket, address, timeout|
begin
socket.connect_nonblock(address)
rescue IO::WaitWritable
wait_for_writtable_socket(socket, address, timeout)
rescue # Connection failed somehow, again
false
end
end
end
private
def wait_for_writtable_socket(socket, address, timeout)
if IO.select(nil, [socket], nil, timeout)
probe_writtable_socket(socket, address)
else # TCP Handshake timed out, or there is something dropping packets
false
end
end
def probe_writtable_socket(socket, address)
begin
socket.connect_nonblock(address)
rescue Errno::EISCONN
true
rescue => e # Connection failed
false
end
end
end
end
class MirrorSocket
def initialize(mirror)
addr_info = Socket.getaddrinfo(mirror.uri.host, mirror.uri.port)
@timeout = mirror.fallback_timeout
@type = addr_info[0][0]
@port = addr_info[0][1]
@host = addr_info[0][3]
end
def with_socket
socket = Socket.new(Socket.const_get(@type), Socket::SOCK_STREAM, 0)
socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
value = yield socket, socket_address, @timeout
socket.close unless socket.closed?
value
end
private
def socket_address
Socket.pack_sockaddr_in(@port, @host)
end
end
end
|
