From: Magnus Henoch <mange@freemail.hu>
Subject: Re: url-retrieve may cause hang
Date: Tue, 17 Oct 2006 02:42:44 +0200 [thread overview]
Message-ID: <878xjfydq3.fsf@freemail.hu> (raw)
In-Reply-To: E7F43645-4FE6-4103-8879-F554E28C8DD9@gmail.com
David Reitter <david.reitter@gmail.com> writes:
> url-retrieve may cause Emacs to hang for around 3 minutes when the
> firewall is configured to delay packets. This is unwanted behavior,
> as url-retrieve claims to work asynchronously.
>
> Example:
>
> Configure firewall to delay (rather than deny) packets:
>
> sudo ipfw add 1 pipe 7 tcp from any to any 80
>
> (url-retrieve "http://www.google.com" 'print)
> % or use url-http for this
>
> -> Hang until time-out (several minutes).
The problem is in url-open-stream in url-gw.el. The URL library uses
open-network-stream, which blocks until the connection is established
(or times out, in this case). url-retrieve is indeed asynchronous
when the connection is established.
It should use make-network-process with appropriate arguments, and set
up sentinels and such, which is the first thing I intend to do after
the release, as it might be tricky to get it right. Or should I
change my plan and do it now?
Magnus
next prev parent reply other threads:[~2006-10-17 0:42 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-16 22:33 url-retrieve may cause hang David Reitter
2006-10-17 0:42 ` Magnus Henoch [this message]
2006-10-17 8:05 ` Kim F. Storm
2006-10-17 14:57 ` Magnus Henoch
2006-10-17 15:38 ` Stefan Monnier
2006-10-23 2:01 ` Magnus Henoch
2006-10-23 11:45 ` Richard Stallman
2006-10-25 14:22 ` Chong Yidong
2006-10-25 23:00 ` Magnus Henoch
2006-10-26 5:23 ` Richard Stallman
2006-10-17 16:24 ` Magnus Henoch
2006-10-17 17:48 ` David Reitter
2006-10-18 16:23 ` Michaël Cadilhac
2006-10-18 5:12 ` Richard Stallman
2006-10-18 9:03 ` Magnus Henoch
2006-10-18 14:01 ` Stefan Monnier
2006-10-18 17:54 ` Richard Stallman
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