libcurl resume support

Using libcurl, does anybody knows how to determine if a web server supports resuming?

I'm trying to make a开发者_StackOverflow中文版 custom update software which needs to determine if the web server supports resuming.

Thanks.

I assume you mean HTTP and then there's really no good way to know until you try it.

you can send a HEAD request firstly with RANGE header, then determine with the response header.