fix issue #1 - remove tcp ping and add http-checking of proxy

Author: Kirill Platonov

lib/proxy_manager/proxy.rb

@@ -13,12 +13,35 @@ def initialize(proxies)
       end
     end
 
-    def connectable?(proxy)
-      proxy = proxy.chomp.split(':') if proxy.is_a? String
-      Net::Ping::TCP.new(proxy[0], proxy[1].to_i).ping
+    def get(count = 1)
+      raise 'List is empty' if @list.empty?
+
+      items = []
+      new_list = @list.clone
+
+      @list.each_with_index do |proxy, key|
+        new_list.shift
+        new_list << proxy
+
+        if count == 1
+          items = proxy
+          break
+        else
+          items << proxy
+          break if items.size == count
+        end
+      end
+
+      @list = new_list
+
+      raise 'There are no available proxy' if items.empty?
+
+      save_to_file(@list_file, @list) if @list_file
+
+      items
     end
 
-    def get(count = 1)
+    def get!(count = 1)
       raise 'List is empty' if @list.empty?
 
       items = []
@@ -27,7 +50,7 @@ def get(count = 1)
       @list.each_with_index do |proxy, key|
         new_list.shift
 
-        if connectable? proxy
+        if self.class.connectable? proxy
           new_list << proxy
 
           if count == 1
@@ -49,6 +72,22 @@ def get(count = 1)
       items
     end
 
+    def self.connectable?(proxy)
+      proxy = proxy.chomp.split(':') if proxy.is_a? String
+      ip, port = proxy
+      connection = Net::HTTP.new("http://google.com", nil, ip, port)
+      connection.open_timeout = 3
+      connection.read_timeout = 3
+
+      connection.start do |http|
+        return true if http.get('/')
+      end
+
+      false
+    rescue Exception => e
+      false
+    end
+
     private
 
     def load_list_from_array(proxies)