Use httpLastModified field for If-Modified-Since header when fetching feed updates

Signed-off-by: Robert Wunderer <robert.wunderer@caprisys.at>

2 files changed, 10 insertions, 3 deletions

diff --git a/lib/Fetcher/FeedFetcher.php b/lib/Fetcher/FeedFetcher.php
index 8864df084..60d798889 100755
--- a/lib/Fetcher/FeedFetcher.php
+++ b/lib/Fetcher/FeedFetcher.php
@@ -114,15 +114,21 @@ class FeedFetcher implements IFeedFetcher
         string $url,
         bool $fullTextEnabled,
         ?string $user,
-        ?string $password
+        ?string $password,
+        ?string $httpLastModified
     ): array {
         $url2 = new Net_URL2($url);
         if (!is_null($user) && trim($user) !== '') {
             $url2->setUserinfo(rawurlencode($user), rawurlencode($password));
         }
+        if (!is_null($httpLastModified) && trim($httpLastModified) !== '') {
+            $lastModified = new DateTime($httpLastModified);
+        } else {
+            $lastModified = null;
+        }
         $url = $url2->getNormalizedURL();
         $this->reader->resetFilters();
-        $resource = $this->reader->read($url);
+        $resource = $this->reader->read($url, null, $lastModified);
 
         $location     = $resource->getUrl();
         $parsedFeed   = $resource->getFeed();
diff --git a/lib/Fetcher/IFeedFetcher.php b/lib/Fetcher/IFeedFetcher.php
index 45e0915f0..8729858b5 100644
--- a/lib/Fetcher/IFeedFetcher.php
+++ b/lib/Fetcher/IFeedFetcher.php
@@ -37,7 +37,8 @@ interface IFeedFetcher
         string $url,
         bool $fullTextEnabled,
         ?string $user,
-        ?string $password
+        ?string $password,
+        ?string $httpLastModified
     ): array;
 
     /**