bug#34103: 26.1; url-retrieve-synchronously freezes in an infinite loop when behind a proxy because of `url-asynchronous' being bound to nil

bug#34103: 26.1; url-retrieve-synchronously freezes in an infinite loop when behind a proxy because of `url-asynchronous' being bound to nil

[Parham Doustdar]

[-- Attachment #1: Type: text/plain, Size: 25470 bytes --]

Hi,
When I'm behind a proxy, want to retrieve a package from `melpa.org', and
have `url-proxy-services' set, `url-retrieve-synchronously' freezes in an
infinite loop. I had a look at the code, and it looks like `url-retrieve'
is failing when `url-asynchronous' is bound to nil. Removing this line
solves the problem.
I'm not sure what exactly is causing this, but it only happens at work,
where i need to set a proxy and I try to download a package.
So, to debug this, here is what I've done so far.
First, I evaluate this expression, which is copied from the `url' package
and adapted to run outside of that function:
(let ((start-time (current-time))
        (url-asynchronous nil)
        (asynch-buffer nil))
  (switch-to-buffer (url-retrieve "
https://melpa.org/packages/closql-20181031.2158.el" (lambda(&rest ignored)

           (message "Done!")))))
Which gives me a buffer that ends with this line:
Process melpa.org connection broken by remote peer
When I comment the second line out, everything is fine.
Also, here is my `*url-debug' buffer when I don't comment this line out:
http -> Contacting host: melpa.org:443
http -> Marking connection as busy: melpa.org:443 #<process melpa.org>
http -> Calling after change function
`url-https-proxy-after-change-function' for `#<process melpa.org>'
http -> url-http-parse-response called in ( *http melpa.org:443*-179517)
http -> Request is:
GET https://melpa.org/packages/closql-20181031.2158.el HTTP/1.1
MIME-Version: 1.0
Connection: close
Extension: Security/Digest Security/SSL
Host: melpa.org
Accept-encoding: gzip
Accept: */*
User-Agent: Mozilla/5.0 (X11; Linux i686 (x86_64))  AppleWebKit/537.36
(KHTML, like Gecko)  Chrome/62.0.2785.8-1 Safari/537.36


http -> Calling after change function
`url-http-wait-for-headers-change-function' for `#<process melpa.org>'
http -> url-http-wait-for-headers-change-function ( *http melpa.org:443
*-179517)
http -> Saw end of headers... ( *http melpa.org:443*-179517)
http -> url-http-parse-response called in ( *http melpa.org:443*-179517)
http -> No content-length, being dumb.
http -> Spinning waiting for headers...
http -> Calling after change function
`url-http-simple-after-change-function' for `#<process melpa.org>'
Thanks for all the help and for working on this awesome editor that has
helped me become so much more productive! <3
In GNU Emacs 26.1 (build 1, x86_64-apple-darwin14.5.0, NS appkit-1348.17
Version 10.10.5 (Build 14F2511))
 of 2018-05-31 built on builder10-10.porkrind.org
Windowing system distributor 'Apple', version 10.3.1561
Recent messages:
#<buffer  *http melpa.org:443*-438499>
error in process sentinel:  Wrong number of arguments: (lambda nil (message
"Done!")), 1 [2 times]
Mark set [2 times]
Type "q" in help window to restore its previous buffer, C-M-v to scroll
help.
Mark set
#<buffer  *http melpa.org:443*-143508>
Done!
Mark set [2 times]
 Quit
Making completion list... [2 times]

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bug#34103: 26.1; url-retrieve-synchronously freezes in an infinite loop when behind a proxy because of `url-asynchronous' being bound to nil

[Lars Ingebrigtsen]

Parham Doustdar <parham90@gmail.com> writes:

> When I'm behind a proxy, want to retrieve a package from `melpa.org',
> and have `url-proxy-services' set, `url-retrieve-synchronously'
> freezes in an infinite loop. I had a look at the code, and it looks
> like `url-retrieve' is failing when `url-asynchronous' is bound to
> nil.

What's the value of your `url-proxy-services' variable?  Proxies should
be working even when using synchronous HTTP connections...

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

bug#34103: 26.1; url-retrieve-synchronously freezes in an infinite loop when behind a proxy because of `url-asynchronous' being bound to nil

[Parham Doustdar]

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Hi,
The value is `(("http" . "xxx.com:3128") ("https" . "xxx.com:3128"))'.
Am I setting this wrong?
Thanks!

On Wed, May 15, 2019 at 7:24 AM Lars Ingebrigtsen <larsi@gnus.org> wrote:

> Parham Doustdar <parham90@gmail.com> writes:
>
> > When I'm behind a proxy, want to retrieve a package from `melpa.org',
> > and have `url-proxy-services' set, `url-retrieve-synchronously'
> > freezes in an infinite loop. I had a look at the code, and it looks
> > like `url-retrieve' is failing when `url-asynchronous' is bound to
> > nil.
>
> What's the value of your `url-proxy-services' variable?  Proxies should
> be working even when using synchronous HTTP connections...
>
> --
> (domestic pets only, the antidote for overdose, milk.)
>    bloggy blog: http://lars.ingebrigtsen.no
>

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