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| | # -*- encoding: binary -*-
# internal implementation details here, do not rely on this in your code
require "socket"
module MogileFS::SocketCommon
attr_reader :mogilefs_addr
def post_init(host, port)
@mogilefs_addr = "#{host}:#{port}"
Socket.const_defined?(:TCP_NODELAY) and
setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
self
end
def unreadable_socket!(timeout)
raise MogileFS::UnreadableSocketError,
"#@mogilefs_addr never became readable (timeout=#{timeout.inspect})"
end
def request_truncated!(written, expect, timeout)
timeout = timeout.inspect
raise MogileFS::RequestTruncatedError,
"request truncated (sent #{written} expected #{expect} timeout=#{timeout})"
end
def timed_gets(timeout = 5)
unless defined?(@rbuf) && @rbuf
@rbuf = timed_read(1024, "", timeout) or return # EOF
end
begin
@rbuf.sub!(/\A(.*\n)/, "".freeze) and return $1
tmp ||= ""
if timed_read(1024, tmp, timeout)
@rbuf << tmp
else
# EOF, return the last buffered bit even without separatar matching
# (not ideal for MogileFS, this is an error)
return @rbuf.empty? ? nil : @rbuf.slice!(0, @rbuf.size)
end
end while true
end
def read(size, buf = "", timeout = 5)
timed_read(size, buf, timeout) or return # nil/EOF
while (remaining = size - buf.bytesize) > 0
tmp ||= ""
timed_read(remaining, tmp, timeout) or return buf # truncated
buf << tmp
end
buf # full read
end
def readpartial(size, buf = "", timeout = 5)
timed_read(size, buf, timeout) or raise EOFError, "end of file reached"
end
# Workaround for https://bugs.ruby-lang.org/issues/13085
# (excessive garbage from IO#write)
# This regression was introduced in Ruby 2.0 (r34847)
# and it is fixed in Ruby 2.4.1+
# backport request: https://bugs.ruby-lang.org/issues/13299
if defined?(RUBY_ENGINE) && RUBY_ENGINE == 'ruby' &&
case RUBY_VERSION
when '2.0.0',
'2.1.0'..'2.1.9',
# we expect 2.2.7 and 2.3.4 to not need this
'2.2.0'..'2.2.6',
'2.3.0'..'2.3.3',
'2.4.0' # 2.4.1 is good!
def write(buf)
# Blocking TCP writes would error out long before one day,
# and MogileFS won't allow file creations which take over a day.
timed_write(buf, 86400)
end
end
end
end
|