Thanks for the reply, Dan,

There are two issues with CURLOPT_OPENSOCKETFUNCTION:

(1) If it happens that an existing connection is reused, then
CURLOPT_OPENSOCKETFUNCTION would not be called, would it?
(2) We try to be low-level socket agnostic, so we are reluctant to call
low-level socket functions directly.

Bin

On Feb 22, 2011 10:38am, Dan Fandrich <dan_at_coneharvesters.com> wrote:
> On Tue, Feb 22, 2011 at 10:00:45AM -0800, Bin Wang wrote:

> > We use libcurl with CURLOPT_FOLLOWLOCATION option turned on. We have a
> need to

> > obtain the IP addresses of all the servers libcurl tries to connect
> along the

> > whole redirection process.

> >

> > Since libcurl currently does not provide this, I am thinking about
> extending

> Methinks you haven't read the documentation closely enough...

> > libcurl. I can think of two approaches of doing this:

> >

> > (1) Add a new user provided callback function. Every time when libcurl
> tries to

> > connect to a server, the callback function is called with the server IP

> > address.

> The CURLOPT_OPENSOCKETFUNCTION does exactly this.

> >>> Dan

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Received on 2011-02-22