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bug#15905: 24.3; url-copy-file sometimes silently downloads garbage or i

From: Ryan C. Thompson
Subject: bug#15905: 24.3; url-copy-file sometimes silently downloads garbage or incomplete file
Date: Mon, 18 Nov 2013 11:52:16 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0

On Mon 18 Nov 2013 11:13:18 AM PST, Ted Zlatanov wrote:
On Sat, 16 Nov 2013 20:53:41 -0800 Ryan <address@hidden> wrote:

R> On Sat Nov 16 15:27:18 2013, Ted Zlatanov wrote:
On Fri, 15 Nov 2013 08:13:13 -0800 Ryan <address@hidden> wrote:

R> In my experience, somewhere around 10% to 20% of the time the
R> downloaded file has some kind of anomaly. Anomalies that I have
R> observed so far include:

R> - the file is not completely retrieved;

R> - the file is complete, but has the following text appended:


- Peer has closed the GnuTLS connection

R> - the file contains only an HTTP header and nothing else:

HTTP/1.1 200 OK
Server: GitHub.com
Date: Thu, 14 Nov 2013 20:54:41 GMT
Content-Type: text/plain; charset=utf-8
Transfer-Encoding: chunked
Status: 200 OK
Strict-Transport-Security: max-age=31536000
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-UA-Compatible: chrome=1
Access-Control-Allow-Origin: https://render.github.com

R> In all cases, "url-copy-file" returns t as if the retrieval was
R> completely successful, so the only way to detect these anomalies is to
R> inspect the file's content.

It's hard to tell from the bug report; can you tell us if your Emacs is
compiled with the GnuTLS library?  (the output of `configure' would
help, or tell us where you got the binary).

R> I believe I got my Emacs from http://emacsformacosx.com/. I don't know
R> the configuration details of it.

That build doesn't have GnuTLS support, so you're running an external
binary (`gnutls-cli' or something similar).  I haven't seen the problems
you report on Mac OS X (tried with the emacsformacosx build), so it may
be something specific to your system.  Can you see if any other users of
the emacsformacosx build can confirm the bug?


So, I just ran my own test case on my work machine (Ubuntu 13.04, Emacs 24.2.1 lucid build from Ubuntu repos), and I did not see the issue. I'm going to try compiling Emacs with gnutls support on my OSX machine to see if that makes any difference.

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