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# encoding: ascii-8bit
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
require 'socket'
module Thrift
class Socket < BaseTransport
def initialize(host='localhost', port=9090, timeout=nil)
@host = host
@port = port
@timeout = timeout
@desc = "#{host}:#{port}"
@handle = nil
end
attr_accessor :handle, :timeout
def open
for addrinfo in ::Socket::getaddrinfo(@host, @port, nil, ::Socket::SOCK_STREAM) do
begin
socket = ::Socket.new(addrinfo[4], ::Socket::SOCK_STREAM, 0)
socket.setsockopt(::Socket::IPPROTO_TCP, ::Socket::TCP_NODELAY, 1)
sockaddr = ::Socket.sockaddr_in(addrinfo[1], addrinfo[3])
begin
socket.connect_nonblock(sockaddr)
rescue Errno::EINPROGRESS
unless IO.select(nil, [ socket ], nil, @timeout)
next
end
begin
socket.connect_nonblock(sockaddr)
rescue Errno::EISCONN
end
end
return @handle = socket
rescue StandardError => e
next
end
end
raise TransportException.new(TransportException::NOT_OPEN, "Could not connect to #{@desc}: #{e}")
end
def open?
!@handle.nil? and !@handle.closed?
end
def write(str)
raise IOError, "closed stream" unless open?
str = Bytes.force_binary_encoding(str)
begin
if @timeout.nil? or @timeout == 0
@handle.write(str)
else
len = 0
start = Time.now
while Time.now - start < @timeout
rd, wr, = IO.select(nil, [@handle], nil, @timeout)
if wr and not wr.empty?
len += @handle.write_nonblock(str[len..-1])
break if len >= str.length
end
end
if len < str.length
raise TransportException.new(TransportException::TIMED_OUT, "Socket: Timed out writing #{str.length} bytes to #{@desc}")
else
len
end
end
rescue TransportException => e
# pass this on
raise e
rescue StandardError => e
@handle.close
@handle = nil
raise TransportException.new(TransportException::NOT_OPEN, e.message)
end
end
def read(sz)
raise IOError, "closed stream" unless open?
begin
if @timeout.nil? or @timeout == 0
data = @handle.readpartial(sz)
else
# it's possible to interrupt select for something other than the timeout
# so we need to ensure we've waited long enough, but not too long
start = Time.now
timespent = 0
rd = loop do
rd, = IO.select([@handle], nil, nil, @timeout - timespent)
timespent = Time.now - start
break rd if (rd and not rd.empty?) or timespent >= @timeout
end
if rd.nil? or rd.empty?
raise TransportException.new(TransportException::TIMED_OUT, "Socket: Timed out reading #{sz} bytes from #{@desc}")
else
data = @handle.readpartial(sz)
end
end
rescue TransportException => e
# don't let this get caught by the StandardError handler
raise e
rescue StandardError => e
@handle.close unless @handle.closed?
@handle = nil
raise TransportException.new(TransportException::NOT_OPEN, e.message)
end
if (data.nil? or data.length == 0)
raise TransportException.new(TransportException::UNKNOWN, "Socket: Could not read #{sz} bytes from #{@desc}")
end
data
end
def close
@handle.close unless @handle.nil? or @handle.closed?
@handle = nil
end
alias to_io handle
def to_s
"socket(#{@host}:#{@port})"
end
end
end
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