[sf-perl] 406 Not Acceptable
David Alban
extasia at extasia.org
Sat Jul 11 14:04:14 PDT 2009
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
--
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