Merge pull request #26 from vanitasvitae/feature_proxy

Feature: Allow configuring proxy server

app/build.gradle

@@ -37,6 +37,7 @@ dependencies {
     // More libraries
     compile 'com.getbase:floatingactionbutton:1.9.1'
     compile 'com.jakewharton:butterknife:8.0.1'
+    compile 'info.guardianproject.netcipher:netcipher:1.2.1'
     apt 'com.jakewharton:butterknife-compiler:8.0.1'
 
 }

app/src/main/java/com/github/dfa/diaspora_android/activity/MainActivity.java

@@ -23,7 +23,9 @@ import android.Manifest;
 import android.animation.ObjectAnimator;
 import android.annotation.SuppressLint;
 import android.app.Activity;
+import android.app.AlarmManager;
 import android.app.AlertDialog;
+import android.app.PendingIntent;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -32,9 +34,11 @@ import android.content.IntentFilter;
 import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.net.Uri;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.Handler;
+import android.os.StrictMode;
 import android.provider.MediaStore;
 import android.support.annotation.NonNull;
 import android.support.design.widget.CollapsingToolbarLayout;
@@ -46,6 +50,7 @@ import android.support.v4.widget.SwipeRefreshLayout;
 import android.support.v7.app.ActionBarDrawerToggle;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.ActionMenuView;
+import android.support.v7.widget.SwitchCompat;
 import android.support.v7.widget.Toolbar;
 import android.text.Html;
 import android.text.SpannableString;
@@ -66,6 +71,7 @@ import android.webkit.WebChromeClient;
 import android.webkit.WebSettings;
 import android.webkit.WebView;
 import android.widget.EditText;
+import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.ProgressBar;
@@ -97,6 +103,8 @@ import java.util.Locale;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import butterknife.OnClick;
+import info.guardianproject.netcipher.NetCipher;
+import info.guardianproject.netcipher.web.WebkitProxy;
 
 public class MainActivity extends AppCompatActivity
         implements NavigationView.OnNavigationItemSelectedListener, WebUserProfileChangedListener {
@@ -216,6 +224,11 @@ public class MainActivity extends AppCompatActivity
         if (android.os.Build.VERSION.SDK_INT >= 21)
             webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
 
+        //Set proxy
+        if(appSettings.isProxyEnabled()) {
+            if(!setProxy()) Toast.makeText(this, R.string.toast_set_proxy_failed, Toast.LENGTH_LONG).show();
+        }
+
         /*
          * WebViewClient
          */
@@ -946,7 +959,8 @@ public class MainActivity extends AppCompatActivity
 
             case R.id.nav_settings_app: {
                 final CharSequence[] options = {getString(R.string.settings_font), getString(R.string.settings_view), appSettings.isLoadImages() ?
-                        getString(R.string.settings_images_switch_off) : getString(R.string.settings_images_switch_on), getString(R.string.jb_pod)};
+                        getString(R.string.settings_images_switch_off) : getString(R.string.settings_images_switch_on), getString(R.string.jb_pod),
+                        getString(R.string.settings_proxy)};
 
                 if (Helpers.isOnline(MainActivity.this)) {
                     new AlertDialog.Builder(MainActivity.this)
@@ -979,6 +993,33 @@ public class MainActivity extends AppCompatActivity
                                                             })
                                                     .show();
                                             break;
+                                        case 4:
+                                            final AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(MainActivity.this);
+                                            final View dialogLayout = getLayoutInflater().inflate(R.layout.proxy_configuration_dialog, null);
+                                            final SwitchCompat enabled_toggle = (SwitchCompat) dialogLayout.findViewById(R.id.proxy_toggle);
+                                            final EditText host_edit = (EditText) dialogLayout.findViewById(R.id.proxy_host_edit);
+                                            final EditText port_edit = (EditText) dialogLayout.findViewById(R.id.proxy_port_edit);
+
+                                            enabled_toggle.setChecked(appSettings.isProxyEnabled());
+                                            host_edit.setText(appSettings.getProxyHost());
+                                            port_edit.setText(""+appSettings.getProxyPort());
+                                            dialogBuilder.setView(dialogLayout).setTitle(R.string.settings_proxy)
+                                                    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                                                        @Override
+                                                        public void onClick(DialogInterface dialog, int which) {
+                                                            boolean proxyEnabled = enabled_toggle.isChecked();
+                                                            String host = host_edit.getText().toString();
+                                                            int port = Integer.parseInt(port_edit.getText().toString());
+
+                                                            if(proxyEnabled) {
+                                                                if(!setProxy(host, port)) {
+                                                                    Toast.makeText(MainActivity.this, R.string.toast_set_proxy_failed,Toast.LENGTH_SHORT).show();
+                                                                }
+                                                            }
+                                                            else resetProxy();
+                                                        }
+                                                    }).setNegativeButton(android.R.string.cancel, null).show();
+                                            break;
                                     }
                                 }
                             }).show();
@@ -1069,4 +1110,66 @@ public class MainActivity extends AppCompatActivity
                         grantResults);
         }
     }
+
+    /**
+     * Set proxy according to arguments. host must not be "" or null, port must be positive.
+     * Return true on success and update appSettings' proxy related values.
+     * @param host proxy host (eg. localhost or 127.0.0.1)
+     * @param port proxy port (eg. 8118)
+     * @return success
+     * @throws IllegalArgumentException if arguments do not fit specifications above
+     */
+    private boolean setProxy(final String host, final int port) {
+        if(host != null && !host.equals("") && port >=0) {
+            //Temporary change thread policy
+            StrictMode.ThreadPolicy old = StrictMode.getThreadPolicy();
+            StrictMode.ThreadPolicy tmp = new StrictMode.ThreadPolicy.Builder().permitAll().build();
+            StrictMode.setThreadPolicy(tmp);
+
+            NetCipher.setProxy(host, port); //Proxy for HttpsUrlConnections
+            try {
+                //Proxy for the webview
+                WebkitProxy.setProxy(MainActivity.class.getName(), getApplicationContext(), null, host, port);
+            } catch (Exception e) { /*Nothing we can do*/ }
+
+            appSettings.setProxyEnabled(true);
+            appSettings.setProxyHost(host);
+            appSettings.setProxyPort(port);
+
+            StrictMode.setThreadPolicy(old);
+            webView.reload();
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    private boolean setProxy() {
+        return setProxy(appSettings.getProxyHost(), appSettings.getProxyPort());
+    }
+
+    private void resetProxy() {
+        appSettings.setProxyEnabled(false);
+
+        //Temporary change thread policy
+        StrictMode.ThreadPolicy old = StrictMode.getThreadPolicy();
+        StrictMode.ThreadPolicy tmp = new StrictMode.ThreadPolicy.Builder().permitAll().build();
+        StrictMode.setThreadPolicy(tmp);
+
+        NetCipher.clearProxy();
+        try{
+            WebkitProxy.resetProxy(MainActivity.class.getName(), this);
+        } catch (Exception e) {
+            //Nothing we can do.
+        }
+
+        StrictMode.setThreadPolicy(old);
+
+        //Restart app
+        Intent restartActivity = new Intent(this, MainActivity.class);
+        PendingIntent pendingIntent = PendingIntent.getActivity(this, 12374, restartActivity, PendingIntent.FLAG_CANCEL_CURRENT);
+        AlarmManager mgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
+        mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 100, pendingIntent);
+        System.exit(0);
+    }
 }

app/src/main/java/com/github/dfa/diaspora_android/data/AppSettings.java

@@ -70,6 +70,9 @@ public class AppSettings {
         private static final String PODUSERPROFILE_ID = "podUserProfile_guid";
         private static final String PODDOMAIN = "podDomain";
         private static final String PODUSERPROFILE_ASPECTS = "podUserProfile_aspects";
+        private static final String PROXY_ENABLED = "isProxyEnabled";
+        private static final String PROXY_HOST = "proxyHost";
+        private static final String PROXY_PORT = "proxyPort";
     }
 
 
@@ -150,4 +153,41 @@ public class AppSettings {
         }
         return aspects;
     }
+
+    public void setProxyEnabled(boolean enabled) {
+        //commit instead of apply because the app is likely to be killed before apply is called.
+        prefApp.edit().putBoolean(PREF.PROXY_ENABLED, enabled).commit();
+    }
+
+    /**
+     * Default return value: false
+     * @return whether proxy is enabled or not
+     */
+    public boolean isProxyEnabled() {
+        return prefApp.getBoolean(PREF.PROXY_ENABLED, false);
+    }
+
+    public void setProxyHost(String host) {
+        setString(prefApp, PREF.PROXY_HOST, host);
+    }
+
+    /**
+     * Default value: ""
+     * @return proxy host
+     */
+    public String getProxyHost() {
+        return prefApp.getString(PREF.PROXY_HOST, "");
+    }
+
+    public void setProxyPort(int port) {
+        setInt(prefApp, PREF.PROXY_PORT, port);
+    }
+
+    /**
+     * Default value: 0
+     * @return proxy port
+     */
+    public int getProxyPort() {
+        return prefApp.getInt(PREF.PROXY_PORT, 0);
+    }
 }

app/src/main/java/com/github/dfa/diaspora_android/task/GetPodsService.java

@@ -28,12 +28,6 @@ import android.util.Log;
 
 import com.github.dfa.diaspora_android.App;
 
-import org.apache.http.HttpEntity;
-import org.apache.http.HttpResponse;
-import org.apache.http.StatusLine;
-import org.apache.http.client.HttpClient;
-import org.apache.http.client.methods.HttpGet;
-import org.apache.http.impl.client.DefaultHttpClient;
 import org.json.JSONArray;
 import org.json.JSONObject;
 
@@ -44,6 +38,10 @@ import java.io.InputStreamReader;
 import java.util.ArrayList;
 import java.util.List;
 
+import javax.net.ssl.HttpsURLConnection;
+
+import info.guardianproject.netcipher.NetCipher;
+
 public class GetPodsService extends Service {
     public static final String MESSAGE_PODS_RECEIVED = "com.github.dfa.diaspora.podsreceived";
     private static final String TAG = App.TAG;
@@ -73,24 +71,28 @@ public class GetPodsService extends Service {
                 // TODO: Update deprecated code
 
                 StringBuilder builder = new StringBuilder();
-                HttpClient client = new DefaultHttpClient();
+                //HttpClient client = new DefaultHttpClient();
                 List<String> list = null;
+                HttpsURLConnection connection;
+                InputStream inStream;
                 try {
-                    HttpGet httpGet = new HttpGet("http://podupti.me/api.php?key=4r45tg&format=json");
+                    connection = NetCipher.getHttpsURLConnection("https://podupti.me/api.php?key=4r45tg&format=json");
-                    HttpResponse response = client.execute(httpGet);
+                    int statusCode = connection.getResponseCode();
-                    StatusLine statusLine = response.getStatusLine();
-                    int statusCode = statusLine.getStatusCode();
                     if (statusCode == 200) {
-                        HttpEntity entity = response.getEntity();
+                        inStream = connection.getInputStream();
-                        InputStream content = entity.getContent();
                         BufferedReader reader = new BufferedReader(
-                                new InputStreamReader(content));
+                                new InputStreamReader(inStream));
                         String line;
                         while ((line = reader.readLine()) != null) {
                             builder.append(line);
                         }
+
+                        try {
+                            inStream.close();
+                        } catch (IOException e) {/*Nothing to do*/}
+
+                        connection.disconnect();
                     } else {
-                        //TODO  Notify User about failure
                         Log.e(TAG, "Failed to download list of pods");
                     }
                 } catch (IOException e) {

app/src/main/java/com/github/dfa/diaspora_android/task/ImageDownloadTask.java

@@ -13,7 +13,12 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 
+import javax.net.ssl.HttpsURLConnection;
+
+import info.guardianproject.netcipher.NetCipher;
+
 /**
+ * Task that can be used to download images from URLs and store them in storage
  * Created by Gregor Santner (gsantner) on 24.03.16.
  */
 public class ImageDownloadTask extends AsyncTask<String, Void, Bitmap> {
@@ -35,9 +40,12 @@ public class ImageDownloadTask extends AsyncTask<String, Void, Bitmap> {
         String url = urls[0];
         Bitmap bitmap = null;
         FileOutputStream out = null;
+        InputStream inStream;
+        HttpsURLConnection connection;
         try {
-            InputStream in = new java.net.URL(url).openStream();
+            connection = NetCipher.getHttpsURLConnection(url);
-            bitmap = BitmapFactory.decodeStream(in);
+            inStream = connection.getInputStream();
+            bitmap = BitmapFactory.decodeStream(inStream);
 
             // Save to file if not null
             if (savePath != null) {
@@ -45,6 +53,12 @@ public class ImageDownloadTask extends AsyncTask<String, Void, Bitmap> {
                 bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
             }
 
+            try {
+                inStream.close();
+            } catch (IOException e) {/*Nothing*/}
+
+            connection.disconnect();
+
         } catch (Exception e) {
             Log.e(App.TAG, e.getMessage());
         } finally {

app/src/main/java/com/github/dfa/diaspora_android/task/ProfileFetchTask.java

@@ -10,11 +10,16 @@ import com.github.dfa.diaspora_android.data.PodUserProfile;
 
 import java.io.BufferedReader;
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.InputStreamReader;
-import java.net.HttpURLConnection;
 import java.net.URL;
 
+import javax.net.ssl.HttpsURLConnection;
+
+import info.guardianproject.netcipher.NetCipher;
+
 /**
+ * AsyncTask to fetch a users profile
  * Created by Gregor Santner (gsantner) on 30.03.16.
  */
 public class ProfileFetchTask extends AsyncTask<Void, Void, Void> {
@@ -37,18 +42,21 @@ public class ProfileFetchTask extends AsyncTask<Void, Void, Void> {
         String cookies = cookieManager.getCookie("https://" + app.getSettings().getPodDomain());
         Log.d(App.TAG, cookies);
 
+        HttpsURLConnection connection;
+        InputStream inStream;
         try {
             URL url = new URL("https://" + app.getSettings().getPodDomain() + "/stream");
-            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+            connection = NetCipher.getHttpsURLConnection(url);
-            conn.setReadTimeout(10000);
+            connection.setReadTimeout(10000);
-            conn.setConnectTimeout(15000);
+            connection.setConnectTimeout(15000);
-            conn.setRequestMethod("GET");
+            connection.setRequestMethod("GET");
             if (cookies != null) {
-                conn.setRequestProperty("Cookie", cookies);
+                connection.setRequestProperty("Cookie", cookies);
             }
-            conn.connect();
+            connection.connect();
 
-            BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
+            inStream = connection.getInputStream();
+            BufferedReader br = new BufferedReader(new InputStreamReader(inStream));
             String line;
             final String TARGET_TAG = "window.gon={};gon.user=";
             while ((line = br.readLine()) != null && !line.startsWith("<body")) {
@@ -57,6 +65,14 @@ public class ProfileFetchTask extends AsyncTask<Void, Void, Void> {
                     break;
                 }
             }
+
+            try{
+                br.close();
+                inStream.close();
+            } catch (IOException e){/*Nothing*/}
+
+            connection.disconnect();
+
         } catch (IOException e) {
             e.printStackTrace();
         }

app/src/main/res/layout/proxy_configuration_dialog.xml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+    <!-- Inner layout for margin -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:layout_margin="@dimen/activity_horizontal_margin">
+        <RelativeLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:id="@+id/lay_toggle">
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignParentLeft="true"
+                android:layout_alignParentStart="true"
+                android:text="@string/proxy_enabled" />
+
+            <android.support.v7.widget.SwitchCompat
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:id="@+id/proxy_toggle"
+                android:layout_alignParentRight="true"
+                android:layout_alignParentEnd="true"/>
+        </RelativeLayout>
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/proxy_host"
+            android:id="@+id/text_host"/>
+        <EditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:id="@+id/proxy_host_edit"/>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/proxy_port"
+            android:id="@+id/text_port"/>
+        <EditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:inputType="number"
+            android:id="@+id/proxy_port_edit"/>
+    </LinearLayout>
+
+</LinearLayout>

app/src/main/res/values-de/strings.xml

@@ -172,5 +172,10 @@ along with this program.  If not, see http://www.gnu.org/licenses.<br> <br
     <string name="toast_saved_image_to_location">Speichere Bild als</string>
     <string name="toast_link_address_copied">Linkadresse kopiert …</string>
     <string name="share_dotdodot">Teilen…</string>
+    <string name="proxy_enabled">Aktiviert</string>
+    <string name="proxy_host">Host</string>
+    <string name="settings_proxy">Proxy</string>
+    <string name="proxy_port">Port</string>
+    <string name="toast_set_proxy_failed">Warnung: Proxy konnte nicht aktiviert werden…</string>
 
 </resources>

app/src/main/res/values/strings.xml

@@ -78,6 +78,10 @@
     <string name="settings_images_switch_on">Do load images</string>
     <string name="settings_images_switch_off">Do not load images</string>
     <string name="settings_view">Change view</string>
+    <string name="settings_proxy">Proxy</string>
+    <string name="proxy_enabled">Enabled</string>
+    <string name="proxy_host">Host</string>
+    <string name="proxy_port">Port</string>
     <string name="share_link">Share link as text</string>
     <string name="share_screenshot">Share screenshot of webpage</string>
     <string name="take_screenshot">Take screenshot of webpage</string>
@@ -219,4 +223,6 @@
     <string name="prefix_https" translatable="false">https://</string>
     <string name="share_dotdodot">Share…</string>
     <string name="app_hashtag" translatable="false">#DiasporaForAndroid</string>
+
+    <string name="toast_set_proxy_failed">Warning: Could not set network proxy…</string>
 </resources>