Dev Options – Link header broken

Hey Raul,
first of all thanks for your efforts in making this plugin! Now, I do have a slight issue with the ‘Dev Options’ – the preload header isn’t working. You seem to have changed the cache directory from ‘/fvm/out’ to cachedirurl var (/cache/fvm/{digits}/out) and as a result its no longer working. When you get a chance, can you please fix this. I’ve been playing around a bit and have done the following changes, hope it helps:

Index: wp-content/plugins/fast-velocity-minify/fvm.php
<+>UTF-8
===================================================================
--- wp-content/plugins/fast-velocity-minify/fvm.php	(date 1562194291000)
+++ wp-content/plugins/fast-velocity-minify/fvm.php	(date 1562276274128)
@@ -2845,7 +2845,7 @@
 # collect all fvm JS files and save them to an headers file
 add_filter('script_loader_tag', 'fastvelocity_collect_js_preload_headers', PHP_INT_MAX, 3 );
 function fastvelocity_collect_js_preload_headers($html, $handle, $src){
-	global $collect_preload_js, $fvm_enabled_css_preload, $fvm_enabled_js_preload;
+	global $cachedirurl, $collect_preload_js, $fvm_enabled_js_preload;
 	
 	# return if disabled
 	if ($fvm_enabled_js_preload != true) { 
@@ -2853,16 +2853,32 @@
 	}
 	
 	# collect
-	if (stripos($src, '/fvm/out/') !== false) { 
+	if (stripos($src, $cachedirurl) !== false) {
 		$collect_preload_js[] = $src;
 	}
 	return $html;
 }
+
+add_filter('style_loader_tag', 'fastvelocity_collect_css_preload_headers', PHP_INT_MAX, 3 );
+function fastvelocity_collect_css_preload_headers($html, $handle, $src){
+    global $cachedirurl, $collect_preload_css, $fvm_enabled_css_preload;
+
+    # return if disabled
+    if ($fvm_enabled_css_preload != true) {
+        return $html;
+    }
+
+    # collect
+    if (stripos($src, $cachedirurl) !== false) {
+        $collect_preload_css[] = $src;
+    }
+    return $html;
+}
 
 # generate preload headers file
 add_action('wp_footer', 'fastvelocity_generate_preload_headers', PHP_INT_MAX); 
 function fastvelocity_generate_preload_headers(){
-	global $collect_preload_css, $collect_preload_js, $fvm_enabled_css_preload, $fvm_enabled_js_preload;
+	global $cachedirurl, $collect_preload_css, $collect_preload_js, $fvm_enabled_css_preload, $fvm_enabled_js_preload;
 	
 	# return if disabled
 	if ($fvm_enabled_css_preload != true && $fvm_enabled_js_preload != true) { 
@@ -2889,7 +2905,7 @@
 		foreach($collect_preload_css as $u) {
 			
 			# filter out footer footer files, because they are not in the critical path
-			if(stripos($u, '/fvm/out/footer-') !== false) { continue; }
+			if(stripos($u, $cachedirurl . '/footer-') !== false) { continue; }
 			
 			# add headers
 			$headers[] = "Link: <$u>; rel=preload; as=style";
@@ -2901,7 +2917,7 @@
 		foreach($collect_preload_js as $u) {
 			
 			# filter out footer footer files, because they are not in the critical path
-			if(stripos($u, '/fvm/out/footer-') !== false) { continue; }
+			if(stripos($u, $cachedirurl . '/footer-') !== false) { continue; }
 			
 			# add headers
 			$headers[] = "Link: <$u>; rel=preload; as=script";

Kind Regards,
Ves.