Merge pull request #2 from augustd/safefile-npe

Fix NPE when passing just filename

Author: augustd

src/main/java/org/owasp/fileio/SafeFile.java

@@ -53,6 +53,7 @@ public SafeFile(URI uri) throws ValidationException {
     }
 
     private void doDirCheck(String path) throws ValidationException {
+        if (path == null) return;
 	Matcher m1 = DIR_BLACKLIST_PAT.matcher(path);
 	if (m1.find()) {
 	    throw new ValidationException("Invalid directory", "Directory path (" + path + ") contains illegal character: " + m1.group());

src/test/java/org/owasp/fileio/SafeFileTest.java

@@ -151,6 +151,13 @@ public void testAlternateDataStream() {
 	} catch (ValidationException expected) {
 	}
     }
+    
+    public void testSafeFileWithoutPath() {
+        try {
+            File sf = new SafeFile("hello.txt");
+        } catch (ValidationException expected) {
+	}
+    }
 
     static public String toHex(final byte b) {
 	final char hexDigit[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};