enable caching of images

config.php-dist

@@ -167,13 +167,11 @@
 	// Cache directory for RSS feeds when using SimplePie
 
 	define('SIMPLEPIE_CACHE_IMAGES', false);
-	// Ignore this option for now on, it doesn't work yet.
-
-	// Cache feed images when using SimplePie. This will allow you to
-	// see images in feeds when originating server uses some sort of
-	// hotlink prevention at the expense of local bandwidth and
-	// disk space.
-
+	// Allow caching feed images when using SimplePie, to bypass hotlink
+	// prevention and such at expense of local disk space and bandwidth.
+	// Note that you (or your users) also have to enable image caching 
+	// in feed editor.
+	
 	define('COUNTERS_MAX_AGE', 365);
 	// Hard limit for unread counters calculation. Try tweaking this
 	// parameter to speed up tt-rss when having a huge number of articles

functions.php

@@ -430,13 +430,14 @@
 			_debug("update_rss_feed: start");
 		}
 
-		$result = db_query($link, "SELECT update_interval,auth_login,auth_pass	
+		$result = db_query($link, "SELECT update_interval,auth_login,auth_pass,cache_images
 			FROM ttrss_feeds WHERE id = '$feed'");
 
 		$auth_login = db_fetch_result($result, 0, "auth_login");
 		$auth_pass = db_fetch_result($result, 0, "auth_pass");
 
 		$update_interval = db_fetch_result($result, 0, "update_interval");
+		$cache_images = sql_bool_to_bool(db_fetch_result($result, 0, "cache_images"));
 
 		if ($update_interval < 0) { return; }
 
@@ -475,9 +476,13 @@
 			$rss->set_feed_url($fetch_url);
 			$rss->set_output_encoding('UTF-8');
 
-/*			if (SIMPLEPIE_CACHE_IMAGES) {
+			if (SIMPLEPIE_CACHE_IMAGES && $cache_images) {
+				if (defined('DAEMON_EXTENDED_DEBUG') || $_GET['xdebug']) {
+					_debug("enabling image cache");
+				}
+
 				$rss->set_image_handler('./image.php', 'i');
-			} */
+			}
 
 			if (defined('DAEMON_EXTENDED_DEBUG') || $_GET['xdebug']) {
 				_debug("feed update interval (sec): " .

image.php

@@ -1,6 +1,6 @@
 <?php
-// This should be modifed as your own use warrants.
+	require_once "config.php";
+	require_once "simplepie/simplepie.inc";
 
-require_once('../simplepie.inc');
-SimplePie_Misc::display_cached_file($_GET['i'], './cache', 'spi');
+	SimplePie_Misc::display_cached_file($_GET['i'], SIMPLEPIE_CACHE_DIR, 'spi');
 ?>

modules/pref-feeds.php

@@ -318,6 +318,27 @@
 				name=\"include_in_digest\"
 				$checked><label for=\"include_in_digest\">".__('Include in e-mail digest')."</label>";
 
+			$cache_images = sql_bool_to_bool(db_fetch_result($result, 0, "cache_images"));
+
+			if ($cache_images) {
+				$checked = "checked";
+			} else {
+				$checked = "";
+			}
+
+			if (ENABLE_SIMPLEPIE && SIMPLEPIE_CACHE_IMAGES) {
+				$disabled = "";
+				$label_class = "";
+			} else {
+				$disabled = "disabled";
+				$label_class = "class='insensitive'";
+			}
+
+			print "<br><input type=\"checkbox\" id=\"cache_images\" 
+				name=\"cache_images\" $disabled
+				$checked><label $label_class for=\"cache_images\">".
+				__('Cache images locally')."</label>";
+
 			print "</td></tr>";
 
 			print "</table>";
@@ -351,6 +372,8 @@
 			$hidden = checkbox_to_sql_bool(db_escape_string($_POST["hidden"]));
 			$include_in_digest = checkbox_to_sql_bool(
 				db_escape_string($_POST["include_in_digest"]));
+			$cache_images = checkbox_to_sql_bool(
+				db_escape_string($_POST["cache_images"]));
 
 			if (get_pref($link, 'ENABLE_FEED_CATS')) {			
 				if ($cat_id && $cat_id != 0) {
@@ -371,6 +394,12 @@
 				$parent_qpart = 'parent_feed = NULL';
 			}
 
+			if (ENABLE_SIMPLEPIE && SIMPLEPIE_CACHE_IMAGES) {
+				$cache_images_qpart = "cache_images = $cache_images,";
+			} else {
+				$cache_images_qpart = "";
+			}
+
 			$result = db_query($link, "UPDATE ttrss_feeds SET 
 				$category_qpart $parent_qpart,
 				title = '$feed_title', feed_url = '$feed_link',
@@ -381,6 +410,7 @@
 				private = $private,
 				rtl_content = $rtl_content,
 				hidden = $hidden,
+				$cache_images_qpart
 				include_in_digest = $include_in_digest
 				WHERE id = '$feed_id' AND owner_uid = " . $_SESSION["uid"]);
 

tt-rss.css

@@ -668,7 +668,7 @@ span.feed_error {
 	color : red;
 }
 
-span.insensitive, div.insensitive, li.insensitive {
+span.insensitive, div.insensitive, li.insensitive, label.insensitive {
 	color : gray;
 }