Created
November 13, 2011 00:29
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proxymanager.rb by jake232 - refactoring
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class ProxyManager | |
class Proxy | |
attr_reader :address | |
attr_accessor :last_used | |
def initialize(address, last_used=nil) | |
@address = address | |
@last_used = last_used | |
end | |
def used_since?(time) | |
@last_used && @last_used > time | |
end | |
end | |
def self.from_proxy_file(path="proxies.txt", delay=10) | |
proxies = IO.readlines(path).map { |line| line.strip } | |
new(proxies, delay) | |
end | |
attr_reader :addresses, :proxies, :delay | |
def initialize(proxies, delay=10) | |
raise ArgumentError, "proxies must contain at least 1 proxy" if proxies.empty? | |
raise ArgumentError, "proxies must be unique, but duplicates were found: #{duplicates(proxies).join(', ')}" if proxies.size != proxies.uniq.size | |
@addresses = proxies | |
@delay = delay | |
@proxies = proxies.map { |address| Proxy.new(address) } | |
end | |
def size | |
@proxies.size | |
end | |
def duplicates(list) | |
list.group_by { |e| e }.select { |k,v| v.size > 1 }.map(&:first) | |
end | |
# @return [Proxy] | |
# A proxy that hasn't been used for at least #delay seconds. | |
# If none is available, the method will block until one becomes available | |
def available_proxy | |
proxy = @proxies.shift | |
@proxies << proxy | |
if proxy.last_used then | |
nap_time = @delay - (Time.now - proxy.last_used) | |
sleep(nap_time) if nap_time > 0 | |
end | |
proxy.last_used = Time.now | |
proxy | |
end | |
def available_proxies(n) | |
return nil if n > @proxies.size | |
proxies = @proxies.shift(n) | |
proxy = proxies.last | |
@proxies.concat(proxies) | |
if proxy.last_used then | |
nap_time = @delay - (Time.now - proxy.last_used) | |
sleep(nap_time) if nap_time > 0 | |
end | |
proxies.each do |proxy| | |
proxy.last_used = Time.now | |
end | |
proxies | |
end | |
def proxy_available? | |
!@proxies.first.used_since?(Time.now-@delay) | |
end | |
def available_count | |
time = Time.now-@delay | |
index = @proxies.find_index { |proxy| proxy.used_since?(time) } | |
index ? index : @proxies.size | |
end | |
end |
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