Merge "Verify inputs to PAC resolving." into klp-dev

import com.android.net.IProxyService;

import java.net.MalformedURLException;

import java.net.URL;

public class PacService extends Service {

    private static final String TAG = "PacService";

        @Override

        public String resolvePacFile(String host, String url) throws RemoteException {

            try {

                // Check for characters that could be used for an injection attack.

                new URL(url);

                for (char c : host.toCharArray()) {

                    if (!Character.isLetterOrDigit(c) && (c != '.') && (c != '-')) {

                        throw new RemoteException("Invalid host was passed");

                    }

                }

                return mPacNative.makeProxyRequest(url, host);

            } catch (MalformedURLException e) {

                throw new RemoteException("Invalid URL was passed");

            }

        }

        @Override