On Sat, 7 Nov 2009, ×óÒã wrote:

> curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, &buff);
>
> throughout the function, i can not find some sentens to allocate memery for
> buff.

That's your app's problem.

> more strange, i find author call function to free buff.

Then it is likely to crash there, or at least ruin the heap.

> So what my question is that do we need to allocate memery for buff by
> ouerselves or curl has allocate by itself?

We already answered this. You provide a pointer to *something* that is then
passed to your callback. libcurl doesn't know what the pointer is and it
doesn't do *anything* with it other than passing it along.

You can allocate it, you can have it on the stack or you can have it as a
global. libcurl doesn't care and doesn't know!

-- 
  / daniel.haxx.se

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Received on 2009-11-07