rework image caching to work without permanent article content rewriting (refs #582)

1 files changed, 28 insertions, 7 deletions

diff --git a/image.php b/image.php
index 91490ea22..cccda64b7 100644
--- a/image.php
+++ b/image.php
@@ -4,14 +4,35 @@
 
 	require_once "config.php";
 
-	$url = base64_decode($_GET['url']);
+	// backwards compatible wrapper for old-style image caching
+	/* if (isset($_GET['url'])) {
+		$url = base64_decode($_GET['url']);
 
-	$filename = CACHE_DIR . '/images/' . sha1($url) . '.png';
+		$filename = CACHE_DIR . '/images/' . sha1($url) . '.png';
 
-	if (file_exists($filename)) {
-		header("Content-type: image/png");
-		echo file_get_contents($filename);
-	} else {
-		header("Location: $url");
+		if (file_exists($filename)) {
+			header("Content-type: image/png");
+			echo file_get_contents($filename);
+		} else {
+			header("Location: $url");
+		}
+
+		return;
+	} */
+
+	@$hash = basename($_GET['hash']);
+
+	if ($hash) {
+
+		$filename = CACHE_DIR . '/images/' . $hash . '.png';
+
+		if (file_exists($filename)) {
+			header("Content-type: image/png");
+			echo file_get_contents($filename);
+		} else {
+			header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
+			echo "File not found.";
+		}
 	}
+
 ?>