On Fri, Oct 19, 2012 at 07:10:46AM -0700, Shawn O. Pearce wrote:
> > IOW, it seems like we are _already_ following the advice referenced in
> > curl's manpage. Is there some case I am missing? Confused...
>
> The issue with the current code is sometimes when libcurl is opening a
> CONNECT style connection through an HTTP proxy it returns a crazy high
> timeout (>240 seconds) and no fds. In this case Git waits forever.
> Stefan observed that using a timeout of 50 ms in this situation to
> poll libcurl is better, as it figures out a lot more quickly that it
> is connected to the proxy and can issue the request.
Ah. That sounds like a bug in curl to me. But either way, if we want to
work around it, wouldn't the right thing be to override curl's timeout
in that instance? Like:
diff --git a/http.c b/http.c
index df9bb71..cd07cdf 100644
--- a/http.c
+++ b/http.c
@@ -631,6 +631,19 @@ void run_active_slot(struct active_request_slot *slot)
FD_ZERO(&excfds);
curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
+ /*
+ * Sometimes curl will give a really long timeout for a
+ * CONNECT when there are no fds to read, but we can
+ * get better results by running curl_multi_perform
+ * more frequently.
+ */
+ if (maxfd < 0 &&
+ (select_timeout.tv_sec > 0 ||
+ select_timeout.tv_usec > 50000)) {
+ select_timeout.tv_sec = 0;
+ select_timeout.tv_usec = 50000;
+ }
+
select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
}
}
-Peff
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