Program exiting from thread with infinite loop

[Steven Schveighoffer]

On 1/19/18 12:05 PM, Chris M. wrote:
> I have the following that is supposed to pull and store info from a 
> server every five minutes. It works if I move the body of 
> deviceDownloader into main(). However when I try to spawn it in another 
> thread it runs the function and then ends once it's done, like it's 
> ignoring the while(true). I tried with std.parallelism, core.thread, 
> vibe.d's concurrency library, but get the same result every time. Any 
> idea how to better accomplish this?
> 
> 
> import std.net.curl;
> import device;
> import std.datetime.systime;
> impor std.concurrency;
> 
> void deviceDownloader()
> {
>      auto APIServer = HTTP();
>      APIServer.addRequestHeader("X-Auth-Token:", AuthToken);
>      APIServer.onProgress = delegate int(size_t dl, size_t dln, size_t 
> ul, size_t uln)
>      {
>          if (dl != 0)
>              write("Progress: downloaded ", dln, " of ", dl, "\r");

What is this call doing? You aren't importing std.stdio, so it can't be 
D's normal write call.

-Steve