AnsweredAssumed Answered

Estimating Size of files downloaded from portal

Question asked by jaarons47 on Jul 14, 2016
Latest reply on Jul 15, 2016 by ANohe-esristaff

Using the Runtime SDK there appears to only be one way to ascertain the size of a portal item for download (in this case I am downloading a TPK or GeoTIFF file for use in our application).  So essentially this forces you to cycle through the InputStream twice.  Once to get the size of the file and then a second time to download.  Obviously this is a waste of time and resources.  Anyone know of a way to access portal items and get content-length as you might do with an httpconnection?  I guess the complication is that if you go outside of the runtime sdk it is using Rest and you would have to provide credentials a second time, even though you are already doing this via the SDK.  It would be a lot nicer if you could just use the "item" to ascertain the file size.  Anybody out there have any ideas?


PortalItem item = PortalItem.fetchItem(portal, itemID);

InputStream inputStream = item.fetchData();

long fileLength;

byte[] buf = new byte[16384];

int len, size = 0;

while ((len = != -1) {

  size += len;



fileLength = size;