Inflater handle empty streams

lib/http/response/inflater.rb

@@ -16,7 +16,7 @@ def readpartial(*args)
         if chunk
           chunk = zstream.inflate(chunk)
         elsif !zstream.closed?
-          zstream.finish
+          zstream.finish if zstream.total_in > 0
           zstream.close
         end
         chunk

spec/lib/http_spec.rb

@@ -438,6 +438,22 @@ def setsockopt(*args)
 
         expect(response.to_s).to eq("#{body}-deflated")
       end
+
+      it "returns empty body for no content response where Content-Encode is gzip" do
+        client   = HTTP.use(:auto_inflate).headers("Accept-Encoding" => "gzip")
+        body     = "Hello!"
+        response = client.post("#{dummy.endpoint}/no-content-204", :body => body)
+
+        expect(response.to_s).to eq("")
+      end
+
+      it "returns empty body for no content response where Content-Encode is deflate" do
+        client   = HTTP.use(:auto_inflate).headers("Accept-Encoding" => "deflate")
+        body     = "Hello!"
+        response = client.post("#{dummy.endpoint}/no-content-204", :body => body)
+
+        expect(response.to_s).to eq("")
+      end
     end
 
     context "with :normalize_uri" do

spec/support/dummy_server/servlet.rb

@@ -172,5 +172,20 @@ def do_#{method.upcase}(req, res)
                    "#{req.body}-raw"
                  end
     end
+
+    post "/no-content-204" do |req, res|
+      res.status = 204
+
+      res.body = case req["Accept-Encoding"]
+                 when "gzip" then
+                   res["Content-Encoding"] = "gzip"
+                   ""
+                 when "deflate" then
+                   res["Content-Encoding"] = "deflate"
+                   ""
+                 else
+                   ""
+                 end
+    end
   end
 end