Fixes possible crash if url is malicious

Try scan a QR code with content `ss://sdf invalid`, an uncaught exception raises.
2017-08-01 19:39:46 +08:00
parent f1db8fff41
commit b1e95babaa
1 changed files with 4 additions and 1 deletions
--- a/ShadowsocksX-NG/Utils.m
+++ b/ShadowsocksX-NG/Utils.m
@ -56,7 +56,10 @@ void ScanQRCodeOnScreen() {
            NSLog(@"%@", feature.messageString);
            if ( [feature.messageString hasPrefix:@"ss://"] )
            {
-                [foundSSUrls addObject:[NSURL URLWithString:feature.messageString]];
+                NSURL *url = [NSURL URLWithString:feature.messageString];
+                if (url) {
+                    [foundSSUrls addObject:url];
+                }
            }
        }
         CGImageRelease(image);