Added Proxy Feature to Ruby SDK

Author: sunil-lakshman

lib/contentstack/api.rb

@@ -7,7 +7,7 @@
 module Contentstack
   class API
     using Utility
-    def self.init_api(api_key, delivery_token, environment, host, branch, live_preview)
+    def self.init_api(api_key, delivery_token, environment, host, branch, live_preview, proxy)
       @host = host
       @api_version = '/v3'
       @environment = environment
@@ -16,6 +16,7 @@ def self.init_api(api_key, delivery_token, environment, host, branch, live_previ
       @branch = branch
       @headers = {environment: @environment}
       @live_preview = live_preview
+      @proxy_details = proxy
     end
 
     def self.live_preview_query(query= {})
@@ -117,7 +118,26 @@ def self.send_preview_request(path, q=nil)
       if !@branch.nil? && !@branch.empty?
         params["branch"] = @branch
       end
-      ActiveSupport::JSON.decode(URI.open("#{preview_host}#{@api_version}#{path}#{query}",params).read)
+      
+      if @proxy_details.empty?
+
+        ActiveSupport::JSON.decode(URI.open("#{preview_host}#{@api_version}#{path}#{query}",params).read)
+
+      elsif @proxy_details.present? && @proxy_details[:url].present? && @proxy_details[:port].present? && @proxy_details[:username].present? && @proxy_details[:password].present?
+          
+        proxy_uri = URI.parse("http://#{@proxy_details[:url]}:#{@proxy_details[:port]}")
+        proxy_username = @proxy_details[:username]
+        proxy_password = @proxy_details[:password]
+       
+        ActiveSupport::JSON.decode(URI.open("#{preview_host}#{@api_version}#{path}#{query}", :proxy_http_basic_authentication => [proxy_uri, proxy_username, proxy_password], "api_key" =>  @api_key, "authorization" => @live_preview[:management_token], "user_agent"=> "ruby-sdk/#{Contentstack::VERSION}", "x-user-agent" => "ruby-sdk/#{Contentstack::VERSION}").read)
+
+      elsif @proxy_details.present? && @proxy_details[:url].present? && @proxy_details[:port].present? && @proxy_details[:username].empty? && @proxy_details[:password].empty?
+        proxy_uri = URI.parse("http://#{@proxy_details[:url]}:#{@proxy_details[:port]}")
+        proxy_auth = {"proxy" => proxy_uri}
+        params_with_proxy = params.merge(proxy_auth)
+        ActiveSupport::JSON.decode(open("#{preview_host}#{@api_version}#{path}#{query}", params_with_proxy).read)
+
+        end
     end
   end
 end