maintain blocks passed to 'perform' in redirects

lib/httparty/request.rb

@@ -103,7 +103,7 @@ def perform(&block)
       end
 
       handle_deflation
-      handle_response(chunked_body)
+      handle_response(chunked_body, &block)
     end
 
     private
@@ -172,14 +172,14 @@ def query_string(uri)
       query_string_parts.size > 0 ? query_string_parts.join('&') : nil
     end
 
-    def handle_response(body)
+    def handle_response(body, &block)
       if response_redirects?
         options[:limit] -= 1
         self.path = last_response['location']
         self.redirect = true
         self.http_method = Net::HTTP::Get unless options[:maintain_method_across_redirects]
         capture_cookies(last_response)
-        perform
+        perform(&block)
       else
         body = body || last_response.body
         Response.new(self, last_response, lambda { parse_response(body) }, :body => body)

lib/httparty/response.rb

@@ -9,7 +9,7 @@ def self.underscore(string)
     def initialize(request, response, parsed_block, options={})
       @request      = request
       @response     = response
-      @body         = response.body || options[:body]
+      @body         = options[:body] || response.body
       @parsed_block = parsed_block
       @headers      = Headers.new(response.to_hash)
     end

spec/httparty/request_spec.rb

@@ -262,6 +262,15 @@
           response.should == {"hash" => {"foo" => "bar"}}
         end
 
+        it "calls block given to perform with each redirect" do
+          @request = HTTParty::Request.new(Net::HTTP::Get, 'http://test.com/redirect', :format => :xml)
+          FakeWeb.register_uri(:get, "http://test.com/redirect", :status => [300, "REDIRECT"], :location => "http://api.foo.com/v2")
+          FakeWeb.register_uri(:get, "http://api.foo.com/v2", :body => "<hash><foo>bar</foo></hash>")
+          body = ""
+          response = @request.perform { |chunk| body += chunk }
+          body.length.should == 27
+        end
+
         it "redirects if a 300 contains a relative location header" do
           redirect = stub_response '', 300
           redirect['location'] = '/foo/bar'