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 <wking@xxxxxxxxxx>
---
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 041da17..ba106c1 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',
+ -last_modified => (%latest_date ? $latest_date{'rfc2822'} : undef),
+ -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 31076ed..afa6bd4 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.output &&
+ grep "Last-modified: Thu, 7 Apr 2005 22:14:13 +0000" gitweb.output
+'
+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.output
+'
+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.output
+'
+test_debug 'cat gitweb.headers'
# ----------------------------------------------------------------------
# load checking
--
1.7.3.4
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