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@@ -145,11 +145,13 @@ module Sinatra
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     end
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     def invoke(request)
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+      params = {}
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       if options[:agent] 
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         return unless request.user_agent =~ options[:agent]
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+        params[:agent] = $~[1..-1]
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       end
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       return unless pattern =~ request.path_info.squeeze('/')
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-      params = param_keys.zip($~.captures.map(&:from_param)).to_hash
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+      params.merge!(param_keys.zip($~.captures.map(&:from_param)).to_hash)
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       Result.new(block, params, 200)
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     end
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@@ -142,6 +142,18 @@ context "Events in an app" do
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     should.not.be.ok
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   end
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+
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+  specify "can filters by agent" do
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+    
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+    get '/', :agent => /Windows (NT)/ do
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+      params[:agent].first
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+    end
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+    
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+    get_it '/', :agent => 'Windows NT'
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+
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+    body.should.equal 'NT'
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+
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+  end
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 end
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