/usr/share/passenger/helper-scripts/prespawn is in ruby-passenger 4.0.37-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | #!/usr/bin/env ruby
# Phusion Passenger - https://www.phusionpassenger.com/
# Copyright (c) 2010, 2011 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.
STDOUT.sync = true
STDERR.sync = true
require 'uri'
require 'socket'
require 'timeout'
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)
location = if uri.host == 'unix'
UNIXPrespawnLocation.new(uri)
else
case uri.scheme
when 'http'
TCPPrespawnLocation.new(uri)
when 'https'
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
def head_request
socket.write("HEAD #{request_path} HTTP/1.1\r\n")
socket.write("Host: #{request_host}\r\n")
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('127.0.0.1', 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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