From b7d565ea4c2bd6d0c79e512eeca77beb15736f80 Mon Sep 17 00:00:00 2001 From: "W. Trevor King" Date: Thu, 29 Mar 2012 08:45:48 -0400 Subject: [PATCH] gitweb: refactor If-Modified-Since handling The current gitweb only generates Last-Modified and handles If-Modified-Since headers for the git_feed action. This patch breaks the Last-Modified and If-Modified-Since handling code out from git_feed into a new function exit_if_unmodified_since. This makes the code easy to reuse for other actions. Only gitweb actions which can easily calculate a modification time should use exit_if_unmodified_since, as the goal is to balance local processing time vs. upload bandwidth. Signed-off-by: W Trevor King Acked-by: Jakub Narebski Signed-off-by: Junio C Hamano --- gitweb/gitweb.perl | 57 ++++++++++++------------ t/t9501-gitweb-standalone-http-status.sh | 27 ++++++++++- 2 files changed, 55 insertions(+), 29 deletions(-) diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl index 041da17a3..6d3f9c0a1 100755 --- a/gitweb/gitweb.perl +++ b/gitweb/gitweb.perl @@ -7003,6 +7003,28 @@ sub snapshot_name { return wantarray ? ($name, $name) : $name; } +sub exit_if_unmodified_since { + my ($latest_epoch) = @_; + our $cgi; + + 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 <= $since) { + my %latest_date = parse_date($latest_epoch); + print $cgi->header( + -last_modified => $latest_date{'rfc2822'}, + -status => '304 Not Modified'); + goto DONE_GITWEB; + } + } +} + sub git_snapshot { my $format = $input_params{'snapshot_format'}; if (!@snapshot_fmts) { @@ -7820,35 +7842,14 @@ sub git_feed { if (defined($commitlist[0])) { %latest_commit = %{$commitlist[0]}; my $latest_epoch = $latest_commit{'committer_epoch'}; - %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'}); - 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', - -last_modified => $latest_date{'rfc2822'}, - -status => '200 OK'); - } else { - print $cgi->header( - -type => $content_type, - -charset => 'utf-8', - -status => '200 OK'); + exit_if_unmodified_since($latest_epoch); + %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'}); } + print $cgi->header( + -type => $content_type, + -charset => 'utf-8', + %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (), + -status => '200 OK'); # Optimization: skip generating the body if client asks only # for Last-Modified date. diff --git a/t/t9501-gitweb-standalone-http-status.sh b/t/t9501-gitweb-standalone-http-status.sh index 31076edc5..358010315 100755 --- a/t/t9501-gitweb-standalone-http-status.sh +++ b/t/t9501-gitweb-standalone-http-status.sh @@ -92,7 +92,7 @@ test_debug 'cat gitweb.output' test_expect_success 'snapshots: bad tree-ish id (tagged object)' ' echo object > tag-object && git add tag-object && - git commit -m "Object to be tagged" && + test_tick && git commit -m "Object to be tagged" && git tag tagged-object `git hash-object tag-object` && gitweb_run "p=.git;a=snapshot;h=tagged-object;sf=tgz" && grep "400 - Object is not a tree-ish" gitweb.output @@ -112,6 +112,31 @@ test_expect_success 'snapshots: bad object id' ' ' test_debug 'cat gitweb.output' +# ---------------------------------------------------------------------- +# modification times (Last-Modified and If-Modified-Since) + +test_expect_success 'modification: feed last-modified' ' + gitweb_run "p=.git;a=atom;h=master" && + grep "Status: 200 OK" gitweb.headers && + grep "Last-modified: Thu, 7 Apr 2005 22:14:13 +0000" gitweb.headers +' +test_debug 'cat gitweb.headers' + +test_expect_success 'modification: feed if-modified-since (modified)' ' + export HTTP_IF_MODIFIED_SINCE="Wed, 6 Apr 2005 22:14:13 +0000" && + test_when_finished "unset HTTP_IF_MODIFIED_SINCE" && + gitweb_run "p=.git;a=atom;h=master" && + grep "Status: 200 OK" gitweb.headers +' +test_debug 'cat gitweb.headers' + +test_expect_success 'modification: feed if-modified-since (unmodified)' ' + export HTTP_IF_MODIFIED_SINCE="Thu, 7 Apr 2005 22:14:13 +0000" && + test_when_finished "unset HTTP_IF_MODIFIED_SINCE" && + gitweb_run "p=.git;a=atom;h=master" && + grep "Status: 304 Not Modified" gitweb.headers +' +test_debug 'cat gitweb.headers' # ---------------------------------------------------------------------- # load checking -- 2.26.2