On Sun, 30 Jan 2011, CHENG LIANG wrote:

> 1) what kind of configutation should I use to make libcurl work for
> CURLOPT_CONNECTTIMEOUT_MS?

All configs work.

> I found follwoing from website but I didn't figure out how to compile
> libcurl to not use standard name resolver. Like CURLOPT_CONNECTTIMEOUT but
> takes the number of milliseconds instead. If libcurl is built to use the
> standard system name resolver, that portion of the connect will still use
> full-second resolution for timeouts with a minimum timeout allowed of one
> second.

That is correct that the name resolving phase with the synchronous name
resolver is full seconds, but it doesn't mean that CURLOPT_CONNECTTIMEOUT_MS
doesn't work. It just means that it has less resolution during the name
resolution part of the connection.

You build libcurl to use an alternative resolver by using c-ares or the
threaded resolver options.

> 2) does option CURLOPT_CONNECTTIMEOUT_MS/CURLOPT_TIMEOUT_MS only used for
> system name resolver?

No.

> does system name resolver is same as convertion from host name to IP
> address?

Converting name to IP is what name resolving means.

> How about if I use IP address instead of host name in the http request?

Then there is no name resolving done.

-- 
  / daniel.haxx.se
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