ProxyHook.java

package mobi.acpm.inspeckage.hooks;

import org.apache.http.HttpHost;
import org.apache.http.conn.params.ConnRoutePNames;
import org.apache.http.impl.client.DefaultHttpClient;

import java.net.URI;

import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XSharedPreferences;
import de.robv.android.xposed.XposedBridge;
import de.robv.android.xposed.XposedHelpers;
import de.robv.android.xposed.callbacks.XC_LoadPackage;
import mobi.acpm.inspeckage.Module;

import static de.robv.android.xposed.XposedBridge.hookAllConstructors;
import static de.robv.android.xposed.XposedHelpers.findAndHookMethod;

/**
 * Created by acpm on 21/11/15.
 */
public class ProxyHook extends XC_MethodHook {

    public static final String TAG = "Inspeckage_Proxy:";
    private static XSharedPreferences sPrefs;

    public static void loadPrefs() {
        sPrefs = new XSharedPreferences(Module.class.getPackage().getName(), Module.PREFS);
        sPrefs.makeWorldReadable();
    }

    public static void initAllHooks(final XC_LoadPackage.LoadPackageParam loadPackageParam) {


        findAndHookMethod("java.net.ProxySelectorImpl", loadPackageParam.classLoader, "select", URI.class, new XC_MethodHook() {

            @Override
            protected void beforeHookedMethod(MethodHookParam param) throws Throwable {

                loadPrefs();

                if (sPrefs.getBoolean("switch_proxy", false)) {

                    System.setProperty("proxyHost", sPrefs.getString("host", null));
                    System.setProperty("proxyPort", sPrefs.getString("port", null));

                    System.setProperty("http.proxyHost", sPrefs.getString("host", null));
                    System.setProperty("http.proxyPort", sPrefs.getString("port", null));

                    System.setProperty("https.proxyHost", sPrefs.getString("host", null));
                    System.setProperty("https.proxyPort", sPrefs.getString("port", null));

                    System.setProperty("socksProxyHost", sPrefs.getString("host", null));
                    System.setProperty("socksProxyPort", sPrefs.getString("port", null));


                    URI uri = (URI) param.args[0];

                    XposedBridge.log(TAG + " [P:" + sPrefs.getString("host", null) + ":" + sPrefs.getString("port", null) + "] - URI = " + uri);
                }
            }
        });

        findAndHookMethod("java.net.ProxySelectorImpl", loadPackageParam.classLoader, "isNonProxyHost", String.class, String.class, new XC_MethodHook() {

            @Override
            protected void beforeHookedMethod(MethodHookParam param) throws Throwable {

                loadPrefs();

                if (sPrefs.getBoolean("switch_proxy", false)) {
                    param.args[1] = "--inpeckage--";
                }
            }
        });

        hookAllConstructors(XposedHelpers.findClass("org.apache.http.impl.client.DefaultHttpClient", loadPackageParam.classLoader), new XC_MethodHook() {
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {

                loadPrefs();

                if (sPrefs.getBoolean("switch_proxy", false)) {
                    String proxyHost = sPrefs.getString("host", null);
                    int proxyPort;
                    try {
                        proxyPort = Integer.parseInt(sPrefs.getString("port", null));
                    } catch (NumberFormatException ex) {
                        proxyPort = -1;
                    }

                    DefaultHttpClient httpClient = (DefaultHttpClient) param.thisObject;
                    HttpHost proxy = new HttpHost(proxyHost, proxyPort);
                    httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
                }
            }
        });
    }
}