ChildOfCode


Code, Maker, Robotic, Open Source. Knowledge Bases


  1. React Native 0.63 running on device by other port solution

    React Native Metro bundler is runs on port 8081. And very unlucky my working machine is running a McAfee antivirus with the port 8081. On React Native official sites there are provide two solution Terminating a process on port 8081 or Using a port other than 8081 . Will the first…

    on IOS, Android, Xcode, Android 11, iOS14.0.1, React Native, react-native 0.63.3, react-native 0.63, port issue, port 8081, McAfee, npx, Xcode12.0.1, Android Studio, Android Studio 4.1

  2. Update iOS 14.0.1 cause WiFi Internet Issue.

    After Update iPhone to latest iOS 14.0.1 Suddenly all connected WiFi network have issue. All web sites show "Safari cannot open the page because your iPhone is not connected to the internet". This is weird because the URL is the internal server like 192.168.0.108. The…

    on IOS, Apple, iOS14.0.1, WiFi, Updated, Internet issue

  3. Docker - Create a Java development environment

    Yes is Docker Again 🐳. ! Well my work need to switch many different programming language and different development environment . Docker is really helpful There are two way to compile and execute you java code. Compile and execute inside the Docker or compile and execute outside the Docker instance. Compile your app…

    on Docker, Java, OpenJDK, OpenJDK8, Compile Java, Execute Java, Open Java Development Kit

  4. Android Java - Get Eddystone Beacon Service Data and Convert

    On Android Eddystone beacon we can store some useful information inside Namespace and Instance to identify unique beacon. Before Learn and Play CTF event. byte, ASCII text, Decimal and Hex is difficult thing for me. But after learning CTF this become very easy . since this kind of numbers is very…

    on Android, Java, Android 11, ASCII, Decimal, Hex, Bytes, byte array, Eddystone, Beacon, Bluetooth, Service Data, Namespace, Instance, convert decimal to hex, scan record

  5. PHP SQL LIKE operator wildcard cause SQL injection

    PHP SQL LIKE operator with percent sign wildcard cause SQL injection vulnerability. One of my team member build a backend system and discovery the backend system can explore all the data by wildcard. So let analysis and investigate why change UserID to percent sign can cause SQL injection and explore…

    on Security, SQL injection, SQL, PHP, Transact-SQL, wildcard, Azure Database, Azure App Service, PHP 5.6.40