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#!/usr/bin/env ruby
# Phusion Passenger - https://www.phusionpassenger.com/
# Copyright (c) 2010-2017 Phusion Holding B.V.
#
# "Passenger", "Phusion Passenger" and "Union Station" are registered
# trademarks of Phusion Holding B.V.
#
# 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.
STDOUT.sync = true
STDERR.sync = true
require 'uri'
require 'socket'
require 'timeout'
require 'base64'
class PrespawnLocation
class InvalidURLError < RuntimeError
def initialize(url)
@url = url
end
def to_s
message
end
def message
"'#{@url}' is not a valid URL."
end
end
def self.parse(url)
uri = uri_for(url)
if uri.scheme == 'unix' || uri.host == 'unix'
location = UNIXPrespawnLocation.new(uri)
else
case uri.scheme
when 'http'
location = TCPPrespawnLocation.new(uri)
when 'https'
location = SSLPrespawnLocation.new(uri)
end
end
unless location
raise InvalidURLError, url
end
location
end
def self.uri_for(url)
URI.parse(url)
rescue URI::InvalidURIError
raise InvalidURLError, url
end
def initialize(uri)
@uri = uri
end
def request_path
@uri.path.empty? ? '/' : @uri.path
end
def request_host
@uri.host
end
def socket
@socket ||= connect
end
if Base64.respond_to?(:strict_encode64)
def base64(data)
Base64.strict_encode64(data)
end
else
# Base64-encodes the given data. Newlines are removed.
# This is like `Base64.strict_encode64`, but also works
# on Ruby 1.8 which doesn't have that method.
def base64(data)
result = Base64.encode64(data)
result.delete!("\n")
result
end
end
def head_request
socket.write("HEAD #{request_path} HTTP/1.1\r\n")
socket.write("Host: #{request_host}\r\n")
socket.write("User-Agent: Passenger Prespawn Script\r\n")
socket.write("Authorization: Basic " + base64(@uri.userinfo) + "\r\n") if @uri.userinfo
socket.write("Connection: close\r\n")
socket.write("\r\n")
begin
Timeout.timeout(10) do
socket.read
end
rescue Timeout::Error
end
end
end
class TCPPrespawnLocation < PrespawnLocation
def request_port
@uri.port
end
def connect
TCPSocket.new(request_host, request_port)
rescue Errno::ECONNREFUSED
TCPSocket.new('::1', request_port)
end
end
class SSLPrespawnLocation < TCPPrespawnLocation
def connect
require 'openssl'
socket = OpenSSL::SSL::SSLSocket.new(super)
socket.sync_close = true
socket.connect
socket
end
end
class UNIXPrespawnLocation < PrespawnLocation
def request_path
super.split(':', 2).last
end
def request_host
'_'
end
def socket_path
@uri.path.split(':', 2).first
end
def connect
UNIXSocket.new(socket_path)
end
end
url = ARGV[0]
begin
prespawn_location = PrespawnLocation.parse(url)
rescue PrespawnLocation::InvalidURLError => e
STDERR.puts "*** ERROR: #{e}"
exit 1
end
prespawn_location.head_request
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