Adding CORS Proxy for remote files

[IshaGupta18]

When the user adds a link to a remote CSV file, we were getting CORS
Access to XMLHttpRequest at 'file url' from origin 'null' has been blocked by CORS policy: Request header field range is not allowed by Access-Control-Allow-Headers in preflight response.

To resolve this, I have used a CORS proxy

function receive(data){ console.log(data,"data"); } function func(){ var data=[] const proxyurl = "https://cors-anywhere.herokuapp.com/"; const url = "http://insight.dev.schoolwires.com/HelpAssets/C2Assets/C2Files/C2ImportCalEventSample.csv"; fetch(proxyurl + url) .then(response => response.text()) .then(contents => receive(contents)) .catch(() => console.log("Can’t access " + url + " response. Blocked by browser?")) }

This seems to work fine. What do you think, @jywarren ?