Fix ui download file handler. (#1949)
Fix ui download file handler. (#1949)

Adds a constructor that accepts a baseUrl.
tomncooper/heron,tomncooper/heron,lucperkins/heron,mycFelix/heron,lucperkins/heron,srkukarni/heron,mycFelix/heron,streamlio/heron,srkukarni/heron,twitter/heron,nlu90/heron,twitter/heron,mycFelix/heron,lucperkins/heron,streamlio/heron,tomncooper/heron,streamlio/heron,huijunwu/heron,ashvina/heron,tomncooper/heron,twitter/heron,twitter/heron,mycFelix/heron,nlu90/heron,srkukarni/heron,ashvina/heron,streamlio/heron,mycFelix/heron,ashvina/heron,ashvina/heron,mycFelix/heron,streamlio/heron,streamlio/heron,huijunwu/heron,srkukarni/heron,nlu90/heron,lucperkins/heron,huijunwu/heron,lucperkins/heron,mycFelix/heron,huijunwu/heron,nlu90/heron,ashvina/heron,tomncooper/heron,ashvina/heron,ashvina/heron,twitter/heron,huijunwu/heron,tomncooper/heron,nlu90/heron,streamlio/heron,tomncooper/heron,tomncooper/heron,lucperkins/heron,mycFelix/heron,nlu90/heron,ashvina/heron,mycFelix/heron,ashvina/heron,twitter/heron,lucperkins/heron,huijunwu/heron,srkukarni/heron,srkukarni/heron,nlu90/heron,huijunwu/heron,huijunwu/heron,streamlio/heron,srkukarni/heron,twitter/heron,tomncooper/heron,srkukarni/heron,nlu90/heron,streamlio/heron,lucperkins/heron,twitter/heron,nlu90/heron