Fix testing if object not null

dr0i · dr0i · commit faddb48a65b5 · 2020-08-28T13:56:33.000+02:00
It should be checked if an Entity has a contentType, not if an Entity has content. See #292 (comment) and #292 (comment).
diff --git a/core/src/main/java/com/github/jsonldjava/utils/JsonUtils.java b/core/src/main/java/com/github/jsonldjava/utils/JsonUtils.java
@@ -383,7 +383,7 @@ private static Object fromJsonLdViaHttpUri(final URL url, final CloseableHttpCli
 
     private static URL alternateLink(URL url, CloseableHttpResponse response)
             throws MalformedURLException, IOException {
-        if (response.getEntity().getContentLength() > 0
+        if (response.getEntity().getContentType() != null
                 && !response.getEntity().getContentType().getValue().equals("application/ld+json")) {
             for (Header header : response.getAllHeaders()) {
                 if (header.getName().equalsIgnoreCase("link")) {
