yOn Mon, 17 May 2010, Alex Hudson wrote:

> I'm writing a program using PyCurl; however, my problem seems to relate to
> the underlying libcurl library, so I'll ask it on this list. I'm using the
> libcurl multi interface, and I need some way to determine if a given
> transfer has completed. It would be most convenient if I were able to supply
> a callback that would be called when the transfer completes; however, there
> doesn't seem to be an option for this.

curl_multi_info_read() is what you need. It is mentioned in the multi
interface overview[1] and in the curl_multi_perform man page[2]. I don't know
how we can document it better.

> The only thing that would seem to be of use is mentioned in the online docs:
> "curl_multi_perform(3) stores the number of still running transfers in one
> of its input arguments, and by reading that you can figure out when all the
> transfers in the multi handles are done." This doesn't give me the
> fine-grained level of control that I need, though. Am I missing something,
> or is the feature not there?

There's no callback for that, no.

[1] = http://curl.haxx.se/libcurl/c/libcurl-multi.html
[2] = http://curl.haxx.se/libcurl/c/curl_multi_perform.html

-- 
  / daniel.haxx.se
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