Check bam file existence in Shiny app

[clbenoit]

Hi !

Is there a way to check if a file exists on the server from R ? I tried RCurl::url.exists methods which never end on a JBrowseR::serve_data server...

RCurl::url.exists("http://127.0.0.1:5000/19A0470_min.bam")

Thanks a lot for your advice,