I'm implementing a custom web server by using NanoHTTPD. I have BaseServer class that extends NanoHTTPD:
public class BaseServer extends NanoHTTPD {
public BaseServer(int port) {
super(port);
// TODO Auto-generated constructor stub
}
@Override
public Response serve(String uri, Method method,
Map<String, String> header, Map<String, String> parms,
Map<String, String> files) {
StringBuilder sb = new StringBuilder();
sb.append("<html>");
sb.append("<head><title>Debug Server</title></head>");
sb.append("<body>");
sb.append("<h1>Response</h1>");
sb.append("<p><blockquote><b>URI -</b> ").append(uri).append("<br />");
sb.append("<b>Method -</b> ").append(method)
.append("</blockquote></p>");
sb.append("<h3>Headers</h3><p><blockquote>").append(header)
.append("</blockquote></p>");
sb.append("<h3>Parms</h3><p><blockquote>").append(parms)
.append("</blockquote></p>");
sb.append("<h3>Files</h3><p><blockquote>").append(files)
.append("</blockquote></p>");
sb.append("</body>");
sb.append("</html>");
return new Response(sb.toString());
}
}
and an activity that use this class by this code:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
bs.start();
Toast.makeText(this, "Server Started", 1).show();
} catch (IOException e) {
// TODO Auto-generated catch block
Toast.makeText(this, e.getMessage(), 3).show();
}
}
My server start correctly, but when I send a request from my browser, I have force close in my app !
when below code was executed(it is in try block), pointer go to final block!!! (Not cache) and I send a Force Close to my phone !!
ByteBuffer fbuf = f.getChannel().map(FileChannel.MapMode.READ_ONLY, 0, f.length());
f is null (no file sent!) and this code should handle this condition !, dosn't it?!
When you run on Android, and write temp files, you need to add a permission to your application. Without the permission, opening the file will throw an exception and bad things will result. Off the top of my head, I think the permission you need to add to your AndroidManifest.xml is
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Try it and see!