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use strict;
use warnings;
use Test::More;
use Test::RequiresInternet ('www.example.com' => 80);
use File::Temp 'tempdir';
use LWP::Simple;
use HTTP::Cache::Transparent;
my $TMPDIR = undef;
# URL of static web content to be retrieved.
my $url = 'http://www.example.com';
# First locate some suitable tmp-dir. We need an absolute path.
# Will be cleaned up once test has completed.
for my $dir (tempdir( CLEANUP => 1 ))
{
if ( open(my $fh, '>', "$dir/test-$$"))
{
close($fh);
unlink("$dir/test-$$");
$TMPDIR = $dir;
last;
}
}
if ( $TMPDIR )
{
$TMPDIR =~ tr|\\|/|;
plan tests => 8;
}
else
{
plan skip_all => 'Cannot test without a suitable TMP Directory';
}
my $ua = LWP::UserAgent->new;
# Create cache in temporary directory with a NoUpdate time of 10 secs
HTTP::Cache::Transparent::init( { BasePath => $TMPDIR,
NoUpdate => 10 } );
# Cache empty. Fetch the URL directly from the server
my $r_init = $ua->get($url);
# Check all headers are undef
is (defined $r_init->header('X-Cached'), '', 'x-cached header should be undef when retrieving directly from server');
is (defined $r_init->header('X-Content-Unchanged'), '', 'x-content-unchanged header should be undef when retrieving directly from server');
is (defined $r_init->header('X-No-Server-Contact'), '', 'x-no-server-contact header should be undef when retrieving directly from server');
# URL Cached and within NoUpdate time. Fetching URL again should return directly from cache
my $r_cached = $ua->get($url);
# Check all headers are set
is (defined $r_cached->header('X-Cached'), 1, 'x-cached header should be set when retrieving directly from cache');
is (defined $r_cached->header('X-Content-Unchanged'), 1, 'x-content-unchanged header should be set when retrieving directly from cache');
is (defined $r_cached->header('X-No-Server-Contact'), 1, 'x-no-server-contact header should be set when retrieving directly from cache');
# Wait for NoUpdate time to expire.
sleep 10;
# URL Cached but outside NoUpdate time. Server should be sent conditional GET before (unchanged) content is returned from cache
my $r_server = $ua->get($url);
# Check X-Cached & X-Content-Unchanged headers are set but X-No-Server-Contact is undef
# Setting of X-Cached header apparently difficult to predict and seems to vary from ISP to ISP. Seems to interact with X-Cache header...
#is (defined $r_server->header('X-Cached'), 1, 'x-cached header should be set when retrieving from cache after HTTP 304 from server');
is (defined $r_server->header('X-Content-Unchanged'), 1, 'x-content-unchanged header should be set when retrieving from cache after HTTP 304 from server');
is (defined $r_server->header('X-No-Server-Contact'), '', 'x-no-server-contact header should be undef when retrieving from cache after HTTP 304 from server');
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