better accept header parsing

server/app/common/get-linked-data.js

@@ -25,38 +25,38 @@ module.exports = async function getLinkedData(req, res, next, resourceUri, templ
     accept = HttpStrings.CONTENT_TYPE_JSONLD;
   }
 
-  if(accept == HttpStrings.CONTENT_TYPE_JSONLD) {
+  let indexOfComma = accept.indexOf(",");
+  let firstAccept = accept.substring(0, indexOfComma);
+
+  if (firstAccept == HttpStrings.CONTENT_TYPE_JSONLD) {
     // Handle JSONLD separately
     var jsonld = await getJsonld(resourceUri, template, formatting);
 
-    if(jsonld != null) {
+    if (jsonld != null) {
       res.set(HttpStrings.HEADER_CONTENT_TYPE, HttpStrings.CONTENT_TYPE_JSONLD);
       res.status(200).send(`${JSON.stringify(jsonld, null, 3)}\n`);
       return;
     }
-  } else {
-
-    // Format the query
-    var query = ServerUtils.formatQuery(template, {
-      RESOURCE_URI: resourceUri
-    });
-
-    // Prepare OPTIONS for database request
-    var headers = {};
-    headers[HttpStrings.HEADER_CONTENT_TYPE] = HttpStrings.CONTENT_TYPE_FORM_URL_ENCODED;
-    headers[HttpStrings.HEADER_ACCEPT] = accept;
-
-    var options = {
-      method: HttpStrings.METHOD_POST,
-      uri: `${process.env.DATABUS_DATABASE_URL}/sparql?timeout=10000`,
-      body: `query=${encodeURIComponent(query)}`,
-      headers: headers,
-    };
-
-    // Pipe the request
-    request(options).pipe(res);
-    return;
   }
 
-  res.status(500).send('Encountered a database error when trying to fetch the resource.');
+  // Format the query
+  var query = ServerUtils.formatQuery(template, {
+    RESOURCE_URI: resourceUri
+  });
+
+  // Prepare OPTIONS for database request
+  var headers = {};
+  headers[HttpStrings.HEADER_CONTENT_TYPE] = HttpStrings.CONTENT_TYPE_FORM_URL_ENCODED;
+  headers[HttpStrings.HEADER_ACCEPT] = accept;
+
+  var options = {
+    method: HttpStrings.METHOD_POST,
+    uri: `${process.env.DATABUS_DATABASE_URL}/sparql?timeout=10000`,
+    body: `query=${encodeURIComponent(query)}`,
+    headers: headers,
+  };
+
+  // Pipe the request
+  request(options).pipe(res);
+  return;
 }