ignore not parsable URls in css function url() on "rewrite-urls". see

#54

Author: Horcrux7

src/com/inet/lib/less/FunctionExpression.java

@@ -52,6 +52,7 @@
 import static com.inet.lib.less.ColorUtils.toHSL;
 import static com.inet.lib.less.ColorUtils.toHSV;
 
+import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
@@ -242,12 +243,16 @@ public void appendTo( CssFormatter formatter ) {
                     String url = get( 1 ).stringValue( formatter );
                     String urlStr = UrlUtils.removeQuote( url );
                     if( formatter.isRewriteUrl( urlStr ) ) {
-                        String relativeUrlStr = get( 0 ).stringValue( formatter );
-                        URL relativeUrl = new URL( "file", null, relativeUrlStr );
-                        relativeUrl = new URL( relativeUrl, urlStr );
-                        boolean quote = url != urlStr;
-                        urlStr = relativeUrl.getPath();
-                        url = quote ? url.charAt( 0 ) + urlStr + url.charAt( 0 ) : urlStr;
+                        try {
+                            String relativeUrlStr = get( 0 ).stringValue( formatter );
+                            URL relativeUrl = new URL( "file", null, relativeUrlStr );
+                            relativeUrl = new URL( relativeUrl, urlStr );
+                            boolean quote = url != urlStr;
+                            urlStr = relativeUrl.getPath();
+                            url = quote ? url.charAt( 0 ) + urlStr + url.charAt( 0 ) : urlStr;
+                        } catch ( MalformedURLException ex ) {
+                            // ignore, occur with data: protocol
+                        }
                     }
                     formatter.append( "url(" );
                     formatter.append( url );

test/com/inet/lib/less/RewriteUrls/all.css

@@ -13,4 +13,5 @@
   url4: url("data:image/jpeg;base64,bm90IGFjdHVhbGx5IGEganBlZyBmaWxlCg==");
   url5: url('subfolder1/DoesNotExists.jpg');
   url4: url('subfolder1/subfolder1/DoesNotExists.jpg');
+  url5: url("data:image/jpeg;base64,bm90IGFjdHVhbGx5IGEganBlZyBmaWxlCg==");
 }

test/com/inet/lib/less/RewriteUrls/local.css

@@ -13,4 +13,5 @@
   url4: url("data:image/jpeg;base64,bm90IGFjdHVhbGx5IGEganBlZyBmaWxlCg==");
   url5: url('DoesNotExists.jpg');
   url4: url('subfolder1/DoesNotExists.jpg');
+  url5: url("data:image/jpeg;base64,bm90IGFjdHVhbGx5IGEganBlZyBmaWxlCg==");
 }

test/com/inet/lib/less/RewriteUrls/off.css

@@ -13,4 +13,5 @@
   url4: url("data:image/jpeg;base64,bm90IGFjdHVhbGx5IGEganBlZyBmaWxlCg==");
   url5: url('DoesNotExists.jpg');
   url4: url('subfolder1/DoesNotExists.jpg');
+  url5: url("data:image/jpeg;base64,bm90IGFjdHVhbGx5IGEganBlZyBmaWxlCg==");
 }

test/com/inet/lib/less/RewriteUrls/subfolder1/sub1.less

@@ -6,5 +6,6 @@
     url3:      url('subfolder1/image.jpg'); 
     url4: data-uri('subfolder1/image.jpg'); 
     url5: data-uri('DoesNotExists.jpg'); 
-    url4: data-uri('subfolder1/DoesNotExists.jpg'); 
+    url4: data-uri('subfolder1/DoesNotExists.jpg');
+    url5: url("data:image/jpeg;base64,bm90IGFjdHVhbGx5IGEganBlZyBmaWxlCg==");
 }