[sf-perl] 406 Not Acceptable

Sat Jul 11 14:07:22 PDT 2009

Have you tried the latest version of libwww-perl?  Gisle has made some
bugfix releases recently.

I've haven't dissected your code here in detail, but thought I would
mention the updated version, it fixed some recent issues for me.

On Sat, Jul 11, 2009 at 2:04 PM, David Alban<extasia at extasia.org> wrote:
> greetings,
>
> i have a "pingurl" program i've been using for years to monitor
> websites.  all of a sudden (within the last two days), it's been
> alerting me that my site is down (which is not the case).  i suspect
> my hosting provider is mucking with their web server software, but am
> not sure.
>
> basically, i'm doing:
>
>     75 my $ua = LWP::UserAgent->new( env_proxy  => 1,
>     76                               keep_alive => 1,
>     77                               timeout    => 30,
>     78                             );
>     79
>     80 my $response = $ua->get( $url );
>
> in the debugger, while at line 80, i see:
>
>       DB<2> x $ua
>     0  LWP::UserAgent=HASH(0x9c4ab6c)
>        'conn_cache' => LWP::ConnCache=HASH(0x9c4d624)
>           'cc_conns' => ARRAY(0x9c773cc)
>                empty array
>           'cc_limit_total' => 1
>        'def_headers' => HTTP::Headers=HASH(0x9c4d564)
>           'user-agent' => 'libwww-perl/5.816'
>        'handlers' => HASH(0x9c4d6d4)
>           'response_header' => HTTP::Config=ARRAY(0x9c4da44)
>              0  HASH(0x9c4de64)
>                 'callback' => CODE(0x9c4aadc)
>                    ->
> &LWP::UserAgent::__ANON__[/usr/lib/perl5/vendor_perl/5.10.0/LWP/UserAgent.pm:621]
> in /usr/lib/perl5/vendor_perl/5.10.0/LWP/UserAgent.pm:609-621
>                 'line' =>
> '/usr/lib/perl5/vendor_perl/5.10.0/LWP/UserAgent.pm:622'
>                 'm_media_type' => 'html'
>                 'owner' => 'LWP::UserAgent::parse_head'
>        'max_redirect' => 7
>        'max_size' => undef
>        'no_proxy' => ARRAY(0x98d5784)
>             empty array
>        'protocols_allowed' => undef
>        'protocols_forbidden' => undef
>        'proxy' => HASH(0x9c4d634)
>             empty hash
>        'requests_redirectable' => ARRAY(0x9c46e3c)
>           0  'GET'
>           1  'HEAD'
>        'show_progress' => undef
>        'timeout' => 30
>        'use_eval' => 1
>
> getting to line 80 with LWP::Debug debugging on, i see:
>
>     LWP::UserAgent::new: ()
>     LWP::UserAgent::request: ()
>     LWP::UserAgent::send_request: GET http://extasia.org/
>     LWP::Protocol::http::request: ()
>     LWP::UserAgent::request: Simple response: Not Acceptable
>
> and then:
>
>       DB<5> x $response
>     0  HTTP::Response=HASH(0xa955dc4)
>        '_content' => '<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
>     <html><head>
>     <title>406 Not Acceptable</title>
>     </head><body>
>     <h1>Not Acceptable</h1>
>     <p>An appropriate representation of the requested resource /
> could not be found on this server.</p>
>     <p>Additionally, a 404 Not Found
>     error was encountered while trying to use an ErrorDocument to
> handle the request.</p>
>     <hr>
>     <address>Apache/2.2.11 (Unix) mod_ssl/2.2.11
> OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4
> FrontPage/5.0.2.2635 mod_jk/1.2.25 Server at extasia.org Port
> 80</address>
>     </body></html>
>     '
>        '_headers' => HTTP::Headers=HASH(0xa955db4)
>           'client-date' => 'Sat, 11 Jul 2009 20:58:08 GMT'
>           'client-peer' => '208.83.209.13:80'
>           'client-response-num' => 1
>           'connection' => 'close'
>           'content-length' => 564
>           'content-type' => 'text/html; charset=iso-8859-1'
>           'date' => 'Sat, 11 Jul 2009 20:58:03 GMT'
>           'server' => 'Apache/2.2.11 (Unix) mod_ssl/2.2.11
> OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4
> FrontPage/5.0.2.2635 mod_jk/1.2.25'
>           'title' => '406 Not Acceptable'
>        '_msg' => 'Not Acceptable'
>        '_protocol' => 'HTTP/1.1'
>        '_rc' => 406
>        '_request' => HTTP::Request=HASH(0xa56ba5c)
>           '_content' => ''
>           '_headers' => HTTP::Headers=HASH(0xa56ba4c)
>              'user-agent' => 'libwww-perl/5.816'
>           '_method' => 'GET'
>           '_uri' => URI::http=SCALAR(0xa36de84)
>              -> 'http://extasia.org/'
>           '_uri_canonical' => URI::http=SCALAR(0xa36de84)
>              -> REUSED_ADDRESS
>        'handlers' => HASH(0xa98ec2c)
>           'response_data' => ARRAY(0xa9742ac)
>              0  CODE(0xa9743bc)
>                 ->
> &LWP::UserAgent::__ANON__[/usr/lib/perl5/vendor_perl/5.10.0/LWP/UserAgent.pm:619]
> in /usr/lib/perl5/vendor_perl/5.10.0/LWP/UserAgent.pm:616-619
>              1  CODE(0xa2c087c)
>                 ->
> &LWP::Protocol::__ANON__[/usr/lib/perl5/vendor_perl/5.10.0/LWP/Protocol.pm:131]
> in /usr/lib/perl5/vendor_perl/5.10.0/LWP/Protocol.pm:128-131
>
> i found http://www.checkupdown.com/status/E406.html and other internet
> resources that describe the 406 response, but i'm not sure how to
> resolve this problem.  i could easily substitute a system() invocation
> of wget for use of LWP (firefox and wget both successfully fetch the
> index page of my site), but i want to understand what has broken this
> after years of successful use.  do i need to add some type of header
> indicating "i'll take whatever wacky content you wanna give me"?
>
> thanks for any assistance,
> david
> --
> Live in a world of your own, but always welcome visitors.
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