From d62de1e44a078e8b3fbb81759a8593ddd85bfd19 Mon Sep 17 00:00:00 2001
From: Stefan Erichsen <stefan@balticfinance.com>
Date: Thu, 4 Jan 2018 18:56:10 +0100
Subject: [PATCH] added detection for server relative URLs

---
 .../org/xhtmlrenderer/css/parser/CSSParser.java    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/flying-saucer-core/src/main/java/org/xhtmlrenderer/css/parser/CSSParser.java b/flying-saucer-core/src/main/java/org/xhtmlrenderer/css/parser/CSSParser.java
index 7bcfc9b3e..19e2d9e27 100644
--- a/flying-saucer-core/src/main/java/org/xhtmlrenderer/css/parser/CSSParser.java
+++ b/flying-saucer-core/src/main/java/org/xhtmlrenderer/css/parser/CSSParser.java
@@ -1951,6 +1951,12 @@ private String getTokenValue(Token t, boolean literal) {
                     if (lastSlash != -1) {
                         uriResult = _URI.substring(0, lastSlash+1) + uriResult;
                     }
+                } else if (isServerRelativeURI(uriResult)) {
+                    int uriOffset = _URI.indexOf("://") + 3;
+                    int firstSlashAfterProtocol = _URI.substring(uriOffset).indexOf('/');
+                    if (firstSlashAfterProtocol != -1) {
+                        uriResult = _URI.substring(0, uriOffset + firstSlashAfterProtocol) + uriResult;
+                    }
                 }
 
                 return uriResult;
@@ -1980,6 +1986,14 @@ private boolean isRelativeURI(String uri) {
         }
     }
 
+    private boolean isServerRelativeURI(String uri) {
+        try {
+            return uri.length() > 0 && uri.charAt(0) == '/' && !new URI(uri).isAbsolute();
+        } catch (URISyntaxException e) {
+            return false;
+        }
+    }
+
     private int getCurrentLine() {
         return _lexer.yyline();
     }