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

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

[Ryan]

This bug report will be sent to the Bug-GNU-Emacs mailing list
and the GNU bug tracker at debbugs.gnu.org. Please check that
the From: line contains a valid email address. After a delay of up
to one day, you should receive an acknowledgment at that address.

Please write in English if possible, as the Emacs maintainers
usually do not have translators for other languages.

Please describe exactly what actions triggered the bug, and
the precise symptoms of the bug. If you can, give a recipe
starting from `emacs -Q':

Here is a link to code to reproduce the bug: 
https://www.dropbox.com/s/lpkdnfb3f9m3ge3/emacs-url-download-bug.el

This code downloads the same problematic file 50 times and tests the 
result each time. The "result" variable is set to a list of the results, 
and the "anomalies" variable is set to a list of strings representing 
the contents of anomalous downloads.

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

- the file is not completely retrieved;

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

 > 0
 >
 > - Peer has closed the GnuTLS connection

- 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

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

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
`bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/Applications/Emacs.app/Contents/Resources/etc/DEBUG.


In GNU Emacs 24.3.1 (x86_64-apple-darwin, NS apple-appkit-1038.36)
of 2013-03-12 on bob.porkrind.org
Windowing system distributor `Apple', version 10.3.1265
Configured using:
`configure '--host=x86_64-apple-darwin' '--build=i686-apple-darwin'
'--with-ns' 'build_alias=i686-apple-darwin'
'host_alias=x86_64-apple-darwin' 'CC=gcc -mmacosx-version-min=10.7
-isystem
/Users/david/Xcode-10.7_4.5.2/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/usr/include/
-F/Users/david/Xcode-10.7_4.5.2/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks''

Important settings:
locale-coding-system: nil
default enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
diff-auto-refine-mode: t
recentf-mode: t
global-pretty-mode: t
pretty-mode: t
sml-modeline-mode: t
show-paren-mode: t
savehist-mode: t
minibuffer-electric-default-mode: t
minibuffer-depth-indicate-mode: t
ido-yes-or-no-mode: t
ido-ubiquitous-mode: t
icomplete-mode: t
global-undo-tree-mode: t
undo-tree-mode: t
desktop-save-mode: t
delete-selection-mode: t
osx-pseudo-daemon-mode: t
lexbind-mode: t
ido-everywhere: t
shell-dirtrack-mode: t
eldoc-mode: t
autopair-global-mode: t
autopair-mode: t
global-auto-complete-mode: t
auto-complete-mode: t
override-global-mode: t
tooltip-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t

Recent input:
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <wheel-down> <double-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <down-mouse-1> <mouse-1> C-x k
<return> <down-mouse-1> <mouse-1> C-h v a n o m a l
<return> <down-mouse-1> <mouse-1> C-M-f C-M-f C-M-f
C-M-f C-x o <up> <up> C-e <left> <left> <left> <down>
C-x C-g C-g C-g <wheel-up> <double-wheel-up> <triple-wheel-up>
<triple-wheel-up> <wheel-up> <double-wheel-up> <triple-wheel-up>
<down-mouse-1> <mouse-1> <up> <up> <up> <up> <up> <up>
<wheel-down> <double-wheel-down> <down-mouse-1> <mouse-1>
<C-S-right> <S-right> <backspace> C-M-k C-k <tab> <C-right>
<right> ( c o n a <backspace> s SPC C-y M-^ <right>
<backspace> <return> <tab> C-x C-s <up> <left> <right>
<left> <left> <right> <C-S-left> <backspace> a p p
<backspace> <backspace> <backspace> n c o n c SPC (
l i s t SPC : u c f - r e t u r n SPC C-d C-d ) <backspace>
C-e ) <down> <tab> C-e ) C-x C-s <up> <down> <down>
<down> <down> C-x C-x C-e C-g C-g <down> <down> <down>
<down> C-x C-e <help-echo> <wheel-down> <double-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<wheel-up> <double-wheel-up> <wheel-up> <double-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <down-mouse-1> <mouse-1> <double-down-mouse-1>
<double-mouse-1> <triple-down-mouse-1> <triple-mouse-1>
<wheel-down> <double-wheel-down> <triple-wheel-down>
<triple-wheel-down> <down-mouse-1> <mouse-1> <wheel-up>
<double-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<down-mouse-1> <mouse-1> <left> C-x o <C-home> C-x
h C-g C-g <down-mouse-1> <mouse-1> C-x C-w ~ / D r
o p <return> C-j M-x r e p o r t - <return>

Recent messages:
(:ucf-return t :has-content t :has-http-header nil :has-tls-closing t 
:can-load nil)
(:ucf-return t :has-content t :has-http-header nil :has-tls-closing nil 
:can-load t)
(:ucf-return t :has-content t :has-http-header nil :has-tls-closing t 
:can-load nil))

"
scroll-down: Beginning of buffer [21 times]
Mark set [3 times]
Quit [2 times]
Saving file /Users/ryan/Dropbox/emacs-url-download-bug.el...
Wrote /Users/ryan/Dropbox/emacs-url-download-bug.el

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Features:
(shadow sort mail-extr sgml-mode pcvs pcvs-parse pcvs-info pcvs-defs
ewoc macros gitignore-mode conf-mode em-glob esh-util mule-util
ebuff-menu electric esup benchmark thisismyfeature dired-x ielm etags
flyspell ispell tramp tramp-compat tramp-loaddefs view dabbrev
reposition mm-archive timezone parse-time cus-edit dired-aux
network-stream starttls url-http tls url-gw url-cache url-auth
url-handlers finder lisp-mnt skeleton autoinsert bs url url-proxy
url-privacy url-expand url-methods url-history url-cookie url-domsuf
url-util url-parse auth-source gnus-util password-cache url-vars mailcap
cc-langs cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align
cc-engine rect smex debug misearch multi-isearch find-func async
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bug#15905: 24.3; url-copy-file sometimes silently downloads garbage or incomplete file

[Ted Zlatanov]

On Fri, 15 Nov 2013 08:13:13 -0800 Ryan <rct@thompsonclan.org> 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:

>> 0
>> 
>> - 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).

Ted

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

[Ryan]

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

On Sat Nov 16 15:27:18 2013, Ted Zlatanov wrote:
> On Fri, 15 Nov 2013 08:13:13 -0800 Ryan <rct@thompsonclan.org> 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:
>
>>> 0
>>>
>>> - 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).
>
> Ted

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

[Ted Zlatanov]

On Sat, 16 Nov 2013 20:53:41 -0800 Ryan <rct@thompsonclan.org> wrote: 

R> On Sat Nov 16 15:27:18 2013, Ted Zlatanov wrote:
>> On Fri, 15 Nov 2013 08:13:13 -0800 Ryan <rct@thompsonclan.org> 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:
>> 
>>>> 0
>>>> 
>>>> - 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?

Ted

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

[Ryan C. Thompson]

On Mon 18 Nov 2013 11:13:18 AM PST, Ted Zlatanov wrote:
> On Sat, 16 Nov 2013 20:53:41 -0800 Ryan <rct@thompsonclan.org> wrote:
>
> R> On Sat Nov 16 15:27:18 2013, Ted Zlatanov wrote:
>>> On Fri, 15 Nov 2013 08:13:13 -0800 Ryan <rct@thompsonclan.org> 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:
>>>
>>>>> 0
>>>>>
>>>>> - 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?
>
> Ted

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.

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

[Ryan]

On Mon Nov 18 11:52:16 2013, Ryan C. Thompson wrote:
> On Mon 18 Nov 2013 11:13:18 AM PST, Ted Zlatanov wrote:
>> On Sat, 16 Nov 2013 20:53:41 -0800 Ryan <rct@thompsonclan.org> wrote:
>>
>> R> On Sat Nov 16 15:27:18 2013, Ted Zlatanov wrote:
>>>> On Fri, 15 Nov 2013 08:13:13 -0800 Ryan <rct@thompsonclan.org> 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:
>>>>
>>>>>> 0
>>>>>>
>>>>>> - 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?
>>
>> Ted
>
> 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.

I ran my test case with Emacs built from Macports, which compiles Emacs 
with GnuTLS support. On this Emacs, the test did not trigger the bug. I 
think we can say that the bug manifests when using an external 
gnutls-cli or similar.

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

[Ted Zlatanov]

On Mon, 18 Nov 2013 12:30:49 -0800 Ryan <rct@thompsonclan.org> wrote: 

>> 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.

R> I ran my test case with Emacs built from Macports, which compiles
R> Emacs with GnuTLS support. On this Emacs, the test did not trigger the
R> bug. I think we can say that the bug manifests when using an external
R> gnutls-cli or similar.

Hi Ryan,

I can't help you much in that area, I don't know the url.el code well
and this may be something about Mac OS X specifically.

I'm glad we determined it's connected to the shell command, though, it
will make the bug fixing easier!

Ted

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

[Noam Postavsky]

[-- Attachment #1: Type: text/plain, Size: 283 bytes --]

> this may be something about Mac OS X specifically.

It's only gnutls-cli specific: I built Emacs 24.3 on Debian
--without-gnutls and got similar results; it also seemed like Emacs
was getting stuck in some CPU burning loop, I eventually C-g'd out of
it.

gnutls-cli version 3.2.12

[-- Attachment #2: emacs-url-download-bug-warnings.txt.gz --]
[-- Type: application/x-gzip, Size: 1557 bytes --]

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

[Lars Ingebrigtsen]

Noam Postavsky <npostavs@users.sourceforge.net> writes:

>> this may be something about Mac OS X specifically.
>
> It's only gnutls-cli specific: I built Emacs 24.3 on Debian
> --without-gnutls and got similar results; it also seemed like Emacs
> was getting stuck in some CPU burning loop, I eventually C-g'd out of
> it.
>
> gnutls-cli version 3.2.12

I'm not sure this is worth fixing -- perhaps the best would be to remove
the support for external TLS programs.  Especially since they don't hook
into the Network Security Manager.  A couple of the "blocking" bug
reports are about that...

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Fri, 25 Dec 2015 21:40:23 +0100
> Cc: 15905@debbugs.gnu.org
> 
> >> this may be something about Mac OS X specifically.
> >
> > It's only gnutls-cli specific: I built Emacs 24.3 on Debian
> > --without-gnutls and got similar results; it also seemed like Emacs
> > was getting stuck in some CPU burning loop, I eventually C-g'd out of
> > it.
> >
> > gnutls-cli version 3.2.12
> 
> I'm not sure this is worth fixing -- perhaps the best would be to remove
> the support for external TLS programs.

If OS X has GnuTLS, then yes, I agree.

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

[John Wiegley]

>>>>> Eli Zaretskii <eliz@gnu.org> writes:

>> I'm not sure this is worth fixing -- perhaps the best would be to remove
>> the support for external TLS programs.

> If OS X has GnuTLS, then yes, I agree.

How do I check this?

-- 
John Wiegley                  GPG fingerprint = 4710 CF98 AF9B 327B B80F
http://newartisans.com                          60E1 46C4 BD1A 7AC1 4BA2

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

[Eli Zaretskii]

> From: John Wiegley <jwiegley@gmail.com>
> Cc: Lars Ingebrigtsen <larsi@gnus.org>,  15905@debbugs.gnu.org,  npostavs@users.sourceforge.net
> Date: Fri, 25 Dec 2015 12:47:32 -0800
> 
> >>>>> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> I'm not sure this is worth fixing -- perhaps the best would be to remove
> >> the support for external TLS programs.
> 
> > If OS X has GnuTLS, then yes, I agree.
> 
> How do I check this?

I don't know.  How do you check whether any piece of software is
available for OS X?

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

[John Wiegley]

>>>>> Eli Zaretskii <eliz@gnu.org> writes:

> I don't know. How do you check whether any piece of software is available
> for OS X?

`starttls-use-gnutls' is set to `t'.  I have gnutls-cli installed.  Is that
enough to say yes?

-- 
John Wiegley                  GPG fingerprint = 4710 CF98 AF9B 327B B80F
http://newartisans.com                          60E1 46C4 BD1A 7AC1 4BA2

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

[Lars Ingebrigtsen]

John Wiegley <jwiegley@gmail.com> writes:

>>>>>> Eli Zaretskii <eliz@gnu.org> writes:
>
>>> I'm not sure this is worth fixing -- perhaps the best would be to remove
>>> the support for external TLS programs.
>
>> If OS X has GnuTLS, then yes, I agree.
>
> How do I check this?

I think somebody in this bug report say that it was?  Let's see...  Yup.

> I ran my test case with Emacs built from Macports, which compiles
> Emacs with GnuTLS support. On this Emacs, the test did not trigger the
> bug. I think we can say that the bug manifests when using an external
> gnutls-cli or similar.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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

[Lars Ingebrigtsen]

John Wiegley <jwiegley@gmail.com> writes:

>>>>>> Eli Zaretskii <eliz@gnu.org> writes:
>
>> I don't know. How do you check whether any piece of software is available
>> for OS X?
>
> `starttls-use-gnutls' is set to `t'.  I have gnutls-cli installed.  Is that
> enough to say yes?

Check what gnutls-available-p says.  If your Emacs has GnuTLS support
built in, it should say t.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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

[Eli Zaretskii]

> From: John Wiegley <jwiegley@gmail.com>
> Cc: larsi@gnus.org,  15905@debbugs.gnu.org,  npostavs@users.sourceforge.net
> Date: Fri, 25 Dec 2015 12:55:15 -0800
> 
> >>>>> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > I don't know. How do you check whether any piece of software is available
> > for OS X?
> 
> `starttls-use-gnutls' is set to `t'.  I have gnutls-cli installed.  Is that
> enough to say yes?

Probably.  ldd should give a definitive answer.

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

[Live System User]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Noam Postavsky <npostavs@users.sourceforge.net> writes:
>
>>> this may be something about Mac OS X specifically.
>>
>> It's only gnutls-cli specific: I built Emacs 24.3 on Debian
>> --without-gnutls and got similar results; it also seemed like Emacs
>> was getting stuck in some CPU burning loop, I eventually C-g'd out of
>> it.
>>
>> gnutls-cli version 3.2.12
>
> I'm not sure this is worth fixing -- perhaps the best would be to remove
> the support for external TLS programs.  Especially since they don't hook
> into the Network Security Manager.  A couple of the "blocking" bug
> reports are about that...

Please don't remove support for external TLS progams as that would
prevent one from using facilities like OpenSSL.

thanks.

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

[John Wiegley]

>>>>> Live System User <nyc4bos@aol.com> writes:

>> I'm not sure this is worth fixing -- perhaps the best would be to remove
>> the support for external TLS programs.  Especially since they don't hook
>> into the Network Security Manager.  A couple of the "blocking" bug
>> reports are about that...

> Please don't remove support for external TLS progams as that would prevent
> one from using facilities like OpenSSL.

Lars, what is the argument for rejecting external TLS programs, for and
against?

-- 
John Wiegley                  GPG fingerprint = 4710 CF98 AF9B 327B B80F
http://newartisans.com                          60E1 46C4 BD1A 7AC1 4BA2

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

[Lars Magne Ingebrigtsen]

John Wiegley <jwiegley@gmail.com> writes:

> Lars, what is the argument for rejecting external TLS programs, for and
> against?

I don't know what the pro argument is.

The argument against is that using external programs doesn't go through
the Emacs network security manager, and TLS validation either has to be
switched off ("--insecure") or switched on for all connections.  Which
is, of course, unacceptable.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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

[Live System User]

Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> John Wiegley <jwiegley@gmail.com> writes:
>
>> Lars, what is the argument for rejecting external TLS programs, for and
>> against?
>
> I don't know what the pro argument is.

One of the pro arguments, of course, is choice.

>
> The argument against is that using external programs doesn't go through
> the Emacs network security manager, and TLS validation either has to be
> switched off ("--insecure") or switched on for all connections.  Which
> is, of course, unacceptable.

You can use certificates with the -CApath argument to OpenSSL just like
GnuTLS uses trustfiles -- it doesn't have to be all or nothing.

I'm not suggesting that the ("--insecure") switch be the default but why
actively prevent users from using OpenSSL or any other external SSL/TLS
program if they choose to do so and go through the trouble of setting
it up for themselves?

No one is against having internal GnuTLS and NSM facilities as a
convenience and a security feature enabled and setup for users as
the default environment.

But please reconsider removing choice for users.

Thanks.