Added a fix for mime type parsing

Author: JanHolger

src/main/java/org/javawebstack/http/router/util/HeaderValue.java

@@ -5,8 +5,8 @@
 
 public class HeaderValue {
 
-    final String value;
-    final Map<String, String> directives = new HashMap<>();
+    private final String value;
+    private final Map<String, String> directives = new HashMap<>();
 
     public HeaderValue(String source) {
         String[] spl = source.split("; ");

src/main/java/org/javawebstack/http/router/util/MimeType.java

@@ -57,6 +57,10 @@ public static MimeType byExtension(String extension) {
     }
 
     public static MimeType byMimeType(String mimeType) {
+        if(mimeType == null)
+            return null;
+        if(mimeType.contains(";"))
+            mimeType = new HeaderValue(mimeType).getValue();
         for (MimeType type : values()) {
             if (type.mimeTypes.contains(mimeType)) {
                 return type;