get the file size of a CFHTTPStream

Question

Hi,

How to get a file size of a CFHTTPStream. Suppose a file called "http://testserver.com/test.jpg " is available to read. Here I need to get the file size "test.jpg", this I need to display progress while using CFReadStreamRead.

Or in other words I need how many bytes are available in the server
before the start of the read process.

Thanks in advance

Mohsin