Creating a varible with a range - ruby

Question

I have a program that attempts to generate open proxies, I will be using this program as a pentesting tool and have recently come across an error:
proxygen.rb:134:in `<=': comparison of Fixnum with nil failed (ArgumentError)
from proxygen.rb:134:in `check_for_amount_of_proxies'
from proxygen.rb:153:in `<main>'
What is happening is I have a variable #file_size and a variable #amount, the #amount variable is used to determine how many possible IP addresses are created and the #file_size is used to determine if the program has found the required amount of proxies and saved them to a file.
Source:
#!/usr/local/bin/env ruby
require 'colored'
require 'timeout'
require 'net/ping'
require 'proxies-scanner'
require 'etc'
LOGIN = Etc.getlogin
PATH = Dir.pwd
def fatal(input)
t = Time.now
puts "\n[[#{t.hour}:#{t.min}:#{t.sec} FATAL]]#{input}".red.bold
end
def notice(input)
t = Time.now
puts "\n[#{t.hour}:#{t.min}:#{t.sec} NOTICE]#{input}\n".blue.bold
end
def err(input)
t = Time.now
puts "[#{t.hour}:#{t.min}:#{t.sec} ERROR]#{input}".red.bold
end
def info(input)
t = Time.now
puts "[#{t.hour}:#{t.min}:#{t.sec} INFO]#{input}".green.bold
end
def success(input)
t= Time.now
puts "[#{t.hour}:#{t.min}:#{t.sec} [SUCCESS]#{input}".green.bold
end
def warn(input)
t = Time.now
puts "[#{t.hour}:#{t.min}:#{t.sec} WARNING]#{input}".yellow.bold
end
def self.windows?
return File.exist? "c:/WINDOWS" if RUBY_PLATFORM == 'java'
RUBY_PLATFORM =~ /mingw32/ || RUBY_PLATFORM =~ /mswin32/
end
def self.linux?
return File.exist? "/usr" if RUBY_PLATFORM == 'java'
RUBY_PLATFORM =~ /linux/
end
def self.os
return :linux if self.linux?
return :windows if self.windows?
nil
end
def check_os
notice("Hello #{LOGIN}, it appears that #{os.capitalize} is your OS, path has been switched to #{PATH}")
end
def check_file
if File.exist?("proxies.txt")
File.truncate("proxies.txt", 0)
notice("File exists in system, resuming process.")
else
notice("File proxies.txt created successfully.")
File.new("proxies.txt")
end
end
def choose_proxy_amount
print "Enter proxy amount: ".yellow.bold
#amount = gets.chomp.to_i
notice("Amount is measure in KB")
case #amount
when #amount >= 100
#file_size = 0..2154
when #amount <= 101
#file_size = 2166..21618
else
end
end
def create_possibles
notice("Attempting to ping generated IP addresses.")
ports = %w(80 443 1935 2222 3128 3130 7808 8080 8081 8085 8089
8090 8102 8104 8106 8118 8119 8123 8888 8898 9000
9090 9797 9999 10000 10052 10053 10059 10088 12345
18000 18001 18008 37564 40080 55336 59998
)
#amount.times do
#ip = Array.new(4){rand(256)}.join('.')
begin
Timeout::timeout(5) do
if Net::Ping::ICMP.new(#ip).ping?# == true
success("Possible proxies created for IP: #{#ip}")
File.open("proxies.txt", "a+") do |proxy|
ports.each { |port| proxy.puts("#{#ip}:#{port}") }
end
else
err("IP failed to ping: #{#ip}")
end
end
rescue Timeout::Error
warn("IP timed out: #{#ip}")
next
end
end
end
def check_for_amount_of_proxies
if File.size("proxies.txt") <= #file_size
notice("Proxies created, attempting connection")
system("proxies-scanner -f proxies.txt")
warn("Truncating file: proxies.txt")
else
notice("File doesn't contain enough proxies, restarting IP finding proccess.")
create_possibles
end
end
begin
check_file
check_os
choose_proxy_amount
create_possibles
check_for_amount_of_proxies
rescue RuntimeError => e
fatal("This program requires Adminstration access to run, please switch to admin terminal.")
end
So the program is failing when it tries to compare the size of the file to the variable #file_size. My question being is there a way to create this variable into a range?

Answer 1

The way you're assigning ranges is fine. Try assigning a range to a variable in IRB or Pry:
[3] (pry) main: 0> foo = 1..2
1..2
[4] (pry) main: 0> foo.class
Range < Object
You can't use <= #file_size if #file_size is a range:
5 <= 1..6
ArgumentError: bad value for range
or
5 <= (1..6)
ArgumentError: comparison of Fixnum with Range failed
You can use === instead:
(1..6) === 5
true
or:
#file_size === File.size("proxies.txt")
You can't reverse the order of the above. The range MUST be on the left:
5 === (1..6)
false
There's lots of pages explaining why.