On Sat, 8 Aug 2015, lu wrote:

> I want to upload large binary file to http server via post method I want to
> use callback function, supports breakpoint and supports multi thread while
> reading the same file I tried several methods, both failed.

You need to tell us *exactly* what you want, what you did and in what ways
your attempts failed or we can't help you.

-- 
  / daniel.haxx.se
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