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gitweb: check if-modified-since for feeds 

Offering Last-modified header for feeds is only half the work, even if
we bail out early on HEAD requests. We should also check that same date
against If-modified-since, and bail out early with 304 Not Modified if
that's the case.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Giuseppe Bilotta 2009-01-26 12:50:16 +01:00 committed by Junio C Hamano
parent 2757b54d46
commit cd956c73a2
1 changed files with 19 additions and 1 deletions
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20
gitweb/gitweb.perl
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@ -6015,7 +6015,25 @@ sub git_feed {
}
if (defined($commitlist[0])) {
%latest_commit = %{$commitlist[0]};
%latest_date = parse_date($latest_commit{'committer_epoch'});
my $latest_epoch = $latest_commit{'committer_epoch'};
%latest_date = parse_date($latest_epoch);
my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
if (defined $if_modified) {
my $since;
if (eval { require HTTP::Date; 1; }) {
$since = HTTP::Date::str2time($if_modified);
} elsif (eval { require Time::ParseDate; 1; }) {
$since = Time::ParseDate::parsedate($if_modified, GMT => 1);
}
if (defined $since && $latest_epoch <= $since) {
print $cgi->header(
-type => $content_type,
-charset => 'utf-8',
-last_modified => $latest_date{'rfc2822'},
-status => '304 Not Modified');
return;
}
}
print $cgi->header(
-type => $content_type,
-charset => 'utf-8',