Support HTTP Basic auth in Rack adapter

lib/httpi/adapter/rack.rb

@@ -1,3 +1,4 @@
+require 'base64'
 require 'httpi/adapter/base'
 require 'httpi/response'
 
@@ -61,17 +62,18 @@ def request(method)
           raise NotSupportedError, "Rack adapter does not support custom HTTP methods"
         end
 
-        env = {}
-        @request.headers.each do |header, value|
-          env["HTTP_#{header.gsub('-', '_').upcase}"] = value
-        end
-
         if @request.proxy
           raise NotSupportedError, "Rack adapter does not support proxying"
         end
 
         if @request.auth.http?
-          raise NotSupportedError, "Rack adapter does not support HTTP auth"
+          if @request.auth.basic?
+            basic_auth = @request.auth.basic.join(':')
+            encoded = Base64.encode64(basic_auth).gsub('\n', '')
+            @request.headers['Authorization'] = "Basic #{encoded}"
+          else
+            raise NotSupportedError, "Rack adapter does not support HTTP #{@request.auth.type} auth"
+          end
         end
 
         if @request.auth.ssl?
@@ -82,6 +84,11 @@ def request(method)
           raise NotSupportedError, "Rack adapter does not support response streaming"
         end
 
+        env = {}
+        @request.headers.each do |header, value|
+          env["HTTP_#{header.gsub('-', '_').upcase}"] = value
+        end
+
         response = @client.request(method.to_s.upcase, @request.url.to_s,
               { :fatal => true, :input => @request.body.to_s }.merge(env))
 

spec/httpi/adapter/rack_spec.rb

@@ -82,14 +82,12 @@
         end
       end
 
-      describe "set_auth" do
-        before do
-          request.auth.basic "username", "password"
-        end
-
-        it "is not supported" do
-          expect { client.request(:get) }.
-            to raise_error(HTTPI::NotSupportedError, "Rack adapter does not support HTTP auth")
+      describe "basic auth" do
+        it "is supported" do
+          request = HTTPI::Request.new(@url + "basic-auth")
+          request.auth.basic("admin", "secret")
+          response = HTTPI.get(request, adapter)
+          expect(response.body).to eq("basic-auth")
         end
       end