Re: [Bug-wget] wget hangs on HTTP 204

[Tim Ruehsen]

Hallo Joshua,

thanks for reporting (and don't mind about duplicates).
It is an old problem that pops up again and again...

RFC 2616 4.3:
   All 1xx
   (informational), 204 (no content), and 304 (not modified) responses
   MUST NOT include a message-body. All other responses do include a
   message-body, although it MAY be of zero length.

We need to extend the test suite to include such a check.
And Joshua is right - Wget should not create a file at all in this case.

Tim

On Monday 21 April 2014 10:57:46 Joshua Pawlicki wrote:
> RFC 2616: "The 204 response MUST NOT include a message-body, and thus is
> always terminated by the first empty line after the header fields."
> 
> So I would expect wget to terminate the connection immediately and write no
> file (or an empty file) when receiving a 204 response. However, it appears
> to attempt to keep the connection open and download a file that is not
> coming.
> 
> I hope this isn't a duplicate - I couldn't find a post in about 204 in the
> archives, but it seems to be a widely known problem (
> https://www.google.com/search?q=wget+204 ).
> 
> To reproduce:
> `wget --server-response http://cr-tools.clients.google.com/service/check2`
> 
> bin$ ./wget --server-response
> http://cr-tools.clients.google.com/service/check2
> --2014-04-21 10:55:36--  http://cr-tools.clients.google.com/service/check2
> Resolving cr-tools.clients.google.com (cr-tools.clients.google.com)...
> 2607:f8b0:400a:804::1009, 173.194.33.168, 173.194.33.169, ...
> Connecting to cr-tools.clients.google.com
> (cr-tools.clients.google.com)|2607:f8b0:400a:804::1009|:80...
> connected.
> HTTP request sent, awaiting response...
>   HTTP/1.1 204 No Content
>   X-Google-Netmon-Label:
> /bns/pa/borg/pa/bns/download/download-aus.autoupdateserver/79
>   Location:
>   Date: Mon, 21 Apr 2014 17:55:36 GMT
>   Server: GSE
>   X-Google-ServerType: tbhome
>   X-Google-Backends:
> /bns/pa/borg/pa/bns/download/download-aus.autoupdateserver/79,achq7:80
>   X-Google-GFE-Request-Trace:
> achq7:80,/bns/pa/borg/pa/bns/download/download-aus.autoupdateserver/79,achq7
> :80 X-Google-DOS-Service-Trace: main:tbhome
>   X-Google-Service: tbhome
>   X-Google-GFE-Response-Code-Details-Trace: response_code_set_by_backend
>   X-Google-Shellfish-Status: CIgC
>   Alternate-Protocol: 80:quic
>   X-Google-GFE-Service-Trace: tbhome
> Length: unspecified
> Saving to: ‘check2.2’
> 
>     [    <=>
>                                                                         ] 0
>           --.-K/s              ^C
> bin$ ./wget --version
> GNU Wget 1.15 built on linux-gnu.
> 
> +digest +https +ipv6 +iri +large-file +nls -ntlm +opie +ssl/gnutls
> 
> Wgetrc:
>     /usr/local/google/home/waffles/bin/wget/etc/wgetrc (system)
> Locale:
>     /usr/local/google/home/waffles/bin/wget/share/locale
> Compile:
>     gcc -DHAVE_CONFIG_H
>     -DSYSTEM_WGETRC="/usr/local/google/home/waffles/bin/wget/etc/wgetrc"
>     -DLOCALEDIR="/usr/local/google/home/waffles/bin/wget/share/locale"
>     -I. -I../lib -I../lib -O2 -Wall
> Link:
>     gcc -O2 -Wall -lgnutls -lz -lidn -lpcre -lrt ftp-opie.o gnutls.o
>     ../lib/libgnu.a
> 
> Copyright (C) 2011 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://www.gnu.org/licenses/gpl.html>.
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
> 
> Originally written by Hrvoje Niksic <address@hidden>.
> Please send bug reports and questions to <address@hidden>.