start work on outbound proxy stuff

lib/diaspora_federation.rb

@@ -47,6 +47,7 @@ module DiasporaFederation
   @http_verbose = false
   @http_redirect_limit = 4
   @http_user_agent = "DiasporaFederation/#{DiasporaFederation::VERSION}"
+  @http_proxy = nil
 
   class << self
     # {Callbacks} instance with defined callbacks
@@ -128,6 +129,13 @@ module DiasporaFederation
     # @return [String] user agent
     attr_reader :http_user_agent
 
+    # HTTP proxy address
+    # @overload http_proxy
+    #   @return [String] http proxy address
+    # @overload http_proxy=
+    #   @param [String] value http proxy address
+    attr_accessor :http_proxy
+
     # Configure the federation library
     #
     # @example

lib/diaspora_federation/federation/sender/hydra_wrapper.rb

@@ -20,7 +20,8 @@ module DiasporaFederation
             method:         :post,
             verbose:        DiasporaFederation.http_verbose,
             cainfo:         DiasporaFederation.certificate_authorities,
-            forbid_reuse:   true
+            forbid_reuse:   true,
+            proxy:          DiasporaFederation.http_proxy
           }
         end
 

lib/diaspora_federation/http_client.rb

@@ -28,7 +28,8 @@ module DiasporaFederation
     private_class_method def self.create_default_connection
       options = {
         request: {timeout: DiasporaFederation.http_timeout},
-        ssl:     {ca_file: DiasporaFederation.certificate_authorities}
+        ssl:     {ca_file: DiasporaFederation.certificate_authorities},
+        proxy:   {uri: DiasporaFederation.http_proxy}
       }
 
       @connection = Faraday::Connection.new(options) do |builder|