Hi,

I try to get some cUrl measurements like name lookup time.

pragma(lib, "curl");
import std.stdio, std.net.curl, etc.c.curl;

void main()
{
	Curl curl;
	curl.initialize();
	curl.set(CurlOption.url, "https://www.google.com");
	curl.perform();
	
	double d;
	curl_easy_getinfo(&curl, CurlInfo.namelookup_time, &d);
	writeln(d);
}

While the cUrl console application return values like "0,015",
this coding returns values like "9.71874e-311".

Where is the bug?

Kind regards
André

On Wednesday, 23 November 2016 at 08:24:46 UTC, Andre Pany wrote:
> 	Curl curl;
> 	curl_easy_getinfo(&curl, CurlInfo.namelookup_time, &d);


curl_easy_getinfo expects the C handle, CURL*, but you are passing it the D struct, Curl.

I don't understand why this even compiles, it should give an invalid argument type error.... let me guess, it has `alias void CURL`... hey look, there it is:

http://dpldocs.info/experimental-docs/source/etc.c.curl.d.html#L110

thanks, zero typechecks. It really should be an opaque struct. Lemme guess too, it was a typedef in C.

https://github.com/curl/curl/blob/master/include/curl/curl.h#L102

gee, typedef and alias aren't the same! This is a bug. A REALLY common bug.



Anyway, as to your specific instance, the D Curl struct has no public function to return the underlying C handle. To use the C functions, you'll have to create them using C functions too.

On Wednesday, 23 November 2016 at 13:59:29 UTC, Adam D. Ruppe wrote:
> On Wednesday, 23 November 2016 at 08:24:46 UTC, Andre Pany wrote:
>> [...]
>
>
> curl_easy_getinfo expects the C handle, CURL*, but you are passing it the D struct, Curl.
>
> [...]

Thank you Adam. I will create a bug report and also an enhancement request.
Getting the the time values is quite cumbersome:)

Kind regards
André