[Bug-wget] wget hangs on HTTP 204

[Joshua Pawlicki]

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>.