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|
# encoding: binary
# Phusion Passenger - http://www.modrails.com/
# Copyright (c) 2010 Phusion
#
# "Phusion Passenger" is a trademark of Hongli Lai & Ninh Bui.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require 'socket'
require 'phusion_passenger/message_channel'
require 'phusion_passenger/utils'
require 'phusion_passenger/utils/tmpdir'
module PhusionPassenger
# A convenience class for communicating with MessageServer servers,
# for example the ApplicationPool server.
class MessageClient
include Utils
# Connect to the given server. By default it connects to the current
# generation's helper server.
def initialize(username, password, address = "unix:#{Utils.passenger_tmpdir}/socket")
@socket = connect_to_server(address)
begin
@channel = MessageChannel.new(@socket)
result = @channel.read
if result.nil?
raise EOFError
elsif result.size != 2 || result[0] != "version"
raise IOError, "The message server didn't sent a valid version identifier"
elsif result[1] != "1"
raise IOError, "Unsupported message server protocol version #{result[1]}"
end
@channel.write_scalar(username)
@channel.write_scalar(password)
result = @channel.read
if result.nil?
raise EOFError
elsif result[0] != "ok"
raise SecurityError, result[0]
end
rescue Exception
@socket.close
raise
end
end
def close
@socket.close if @socket
@channel = @socket = nil
end
def connected?
return !!@channel
end
### ApplicationPool::Server methods ###
def detach(detach_key)
write("detach", detach_key)
check_security_response
result = read
if result.nil?
raise EOFError
else
return result.first == "true"
end
end
def status
write("inspect")
check_security_response
return read_scalar
rescue
auto_disconnect
raise
end
def xml
write("toXml", true)
check_security_response
return read_scalar
end
### BacktracesServer methods ###
def backtraces
write("backtraces")
check_security_response
return read_scalar
end
### Low level I/O methods ###
def read
return @channel.read
rescue
auto_disconnect
raise
end
def write(*args)
@channel.write(*args)
rescue
auto_disconnect
raise
end
def write_scalar(*args)
@channel.write_scalar(*args)
rescue
auto_disconnect
raise
end
def read_scalar
return @channel.read_scalar
rescue
auto_disconnect
raise
end
def recv_io(klass = IO, negotiate = true)
return @channel.recv_io(klass, negotiate)
rescue
auto_disconnect
raise
end
def check_security_response
begin
result = @channel.read
rescue
auto_disconnect
raise
end
if result.nil?
raise EOFError
elsif result[0] != "Passed security"
raise SecurityError, result[0]
end
end
private
def auto_disconnect
if @channel
@socket.close rescue nil
@socket = @channel = nil
end
end
end
end # module PhusionPassenger
|
