diff --git a/lib/raven/integrations/rack.rb b/lib/raven/integrations/rack.rb
index f1115f323..f6a411f33 100644
--- a/lib/raven/integrations/rack.rb
+++ b/lib/raven/integrations/rack.rb
@@ -66,4 +66,62 @@ def call(env)
       response
     end
   end
+
+  module RackInterface
+    def from_rack(env_hash)
+      req = ::Rack::Request.new(env_hash)
+
+      self.url = req.scheme && req.url.split('?').first
+      self.method = req.request_method
+      self.query_string = req.query_string
+      self.data = read_data_from(req)
+
+      self.headers = format_headers_for_sentry(env_hash)
+      self.env = format_env_for_sentry(env_hash)
+    end
+
+    private
+
+    def read_data_from(request)
+      if request.form_data?
+        request.POST
+      elsif request.body
+        data = request.body.read
+        request.body.rewind
+        data
+      end
+    end
+
+    def format_headers_for_sentry(env_hash)
+      env_hash.each_with_object({}) do |(key, value), memo|
+        key = key.to_s # rack env can contain symbols
+        value = value.to_s
+        next unless key.upcase == key # Non-upper case stuff isn't either
+        # Rack adds in an incorrect HTTP_VERSION key, which causes downstream
+        # to think this is a Version header. Instead, this is mapped to
+        # env['SERVER_PROTOCOL']. But we don't want to ignore a valid header
+        # if the request has legitimately sent a Version header themselves.
+        # See: https://github.com/rack/rack/blob/028438f/lib/rack/handler/cgi.rb#L29
+        next if key == 'HTTP_VERSION' && value == ENV['SERVER_PROTOCOL']
+        if key.start_with?('HTTP_')
+          # Header
+          http_key = key[5..key.length - 1].split('_').map(&:capitalize).join('-')
+          memo[http_key] = value
+        elsif %w(CONTENT_TYPE CONTENT_LENGTH).include? key
+          memo[key.capitalize] = value
+        end
+      end
+    end
+
+    def format_env_for_sentry(env_hash)
+      trimmed_hash = env_hash.select do |k, _v|
+        %w(REMOTE_ADDR SERVER_NAME SERVER_PORT).include? k.to_s
+      end
+      Hash[trimmed_hash] # select returns an Array in Ruby 1.8
+    end
+  end
+
+  class HttpInterface
+    include RackInterface
+  end
 end
diff --git a/lib/raven/interfaces/http.rb b/lib/raven/interfaces/http.rb
index 46ac5c599..ad89d2d18 100644
--- a/lib/raven/interfaces/http.rb
+++ b/lib/raven/interfaces/http.rb
@@ -17,43 +17,6 @@ def initialize(*arguments)
       self.cookies = nil
       super(*arguments)
     end
-
-    def from_rack(env)
-      req = ::Rack::Request.new(env)
-      self.url = req.scheme && req.url.split('?').first
-      self.method = req.request_method
-      self.query_string = req.query_string
-      server_protocol = env['SERVER_PROTOCOL']
-      env.each_pair do |key, value|
-        key = key.to_s #rack env can contain symbols
-        next unless key.upcase == key # Non-upper case stuff isn't either
-        # Rack adds in an incorrect HTTP_VERSION key, which causes downstream
-        # to think this is a Version header. Instead, this is mapped to
-        # env['SERVER_PROTOCOL']. But we don't want to ignore a valid header
-        # if the request has legitimately sent a Version header themselves.
-        # See: https://github.com/rack/rack/blob/028438f/lib/rack/handler/cgi.rb#L29
-        next if key == 'HTTP_VERSION' and value == server_protocol
-        if key.start_with?('HTTP_')
-          # Header
-          http_key = key[5..key.length - 1].split('_').map(&:capitalize).join('-')
-          self.headers[http_key] = value.to_s
-        elsif %w(CONTENT_TYPE CONTENT_LENGTH).include? key
-          self.headers[key.capitalize] = value.to_s
-        elsif %w(REMOTE_ADDR SERVER_NAME SERVER_PORT).include? key
-          # Environment
-          self.env[key] = value.to_s
-        end
-      end
-
-      self.data =
-        if req.form_data?
-          req.POST
-        elsif req.body
-          data = req.body.read
-          req.body.rewind
-          data
-        end
-    end
   end
 
   register_interface :http => HttpInterface