package net.i2p.android.router.web;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.AsyncTask;
import android.view.Gravity;
import android.view.View;
import android.webkit.HttpAuthHandler;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
import net.i2p.android.apps.EepGetFetcher;
import net.i2p.android.router.provider.CacheProvider;
import net.i2p.android.router.util.AppCache;
import net.i2p.android.router.util.Connectivity;
import net.i2p.android.router.util.Util;
import net.i2p.data.DataHelper;
import net.i2p.util.EepGet;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class I2PWebViewClient extends WebViewClient {
private BGLoad _lastTask;
/** save it here so we can dismiss it in onPageFinished() */
private ProgressDialog _lastDialog;
// TODO add some inline style
private static final String CONTENT = "content";
private static final String HEADER = "<html><head></head><body>";
private static final String FOOTER = "</body></html>";
private static final String ERROR_URL = "<p>Unable to load URL: ";
private static final String ERROR_ROUTER = "<p>Your router (or the HTTP proxy) does not appear to be running.</p>";
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Util.d("Should override? " + url);
view.stopLoading();
Uri uri = Uri.parse(url);
if (CONTENT.equals(uri.getScheme())) {
// Fix up top-level links like <a href="/foo">
// take the host from the current uri and the path from the new uri
String currentUrl = view.getUrl();
Uri currentUri = Uri.parse(currentUrl);
uri = CacheProvider.rectifyContentUri(currentUri, uri);
//reverse back to a i2p URI so we can load it here and not in ContentProvider
try {
uri = CacheProvider.getI2PUri(uri);
Util.d("Reversed content uri back to " + uri);
} catch (FileNotFoundException fnfe) {}
url = uri.toString();
}
String s = uri.getScheme();
if (s == null) {
fail(view, "Bad URL " + url);
return true;
}
s = s.toLowerCase();
if (!(s.equals("http") || s.equals("https") ||
s.equals(CONTENT))) {
Util.d("Not loading URL " + url);
return false;
}
String h = uri.getHost();
if (h == null) {
fail(view, "Bad URL " + url);
return true;
}
if (!Connectivity.isConnected(view.getContext())) {
fail(view, "No Internet connection is available");
return true;
}
h = h.toLowerCase();
if (h.endsWith(".i2p")) {
if (!s.equals("http")) {
fail(view, "Bad URL " + url);
return true;
}
// TODO check that the router is up and we have client tunnels both ways
// strip trailing junk
int hash = url.indexOf("#");
if (hash > 0)
url = url.substring(0, hash);
view.getSettings().setLoadsImagesAutomatically(true);
///////// API 8
// Otherwise hangs waiting for CSS
view.getSettings().setBlockNetworkLoads(false);
_lastDialog = new ProgressDialog(view.getContext());
BGLoad task = new BackgroundEepLoad(view, h, _lastDialog);
_lastTask = task;
task.execute(url);
} else {
if (s.equals(CONTENT)) {
// canonicalize to append query to path
// because the resolver doesn't send a query to the provider
Uri canon = CacheProvider.getContentUri(uri);
if (canon == null) {
fail(view, "Bad URL " + url);
return true;
}
url = canon.toString();
}
view.getSettings().setLoadsImagesAutomatically(true);
///////// API 8
view.getSettings().setBlockNetworkLoads(false);
//view.loadUrl(url);
BGLoad task = new BackgroundLoad(view);
_lastTask = task;
Util.d("Fetching via web or resource: " + url);
task.execute(url);
}
return true;
}
private static void fail(View v, String s) {
Util.d("Fail toast: " + s);
Toast toast = Toast.makeText(v.getContext(), s, Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
@Override
public void onLoadResource(WebView view, String url) {
Util.d("OLR URL: " + url);
super.onLoadResource(view, url);
}
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Util.d("ORE " + errorCode + " Desc: " + description + " URL: " + failingUrl);
super.onReceivedError(view, errorCode, description, failingUrl);
}
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
Util.d("OPS URL: " + url);
super.onPageStarted(view, url, favicon);
}
@Override
public void onPageFinished(WebView view, String url) {
Util.d("OPF URL: " + url);
ProgressDialog d = _lastDialog;
if (d != null && d.isShowing()) {
try {
// throws IAE - not attached to window manager - on screen rotation
// isShowing() may cover it though.
d.dismiss();
} catch (Exception e) {}
}
super.onPageFinished(view, url);
}
@Override
public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
Util.d("ORHAR URL: " + host);
super.onReceivedHttpAuthRequest(view, handler, host, realm);
}
/******
API 11 :(
@Override
public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
}
******/
public void cancelAll() {
BGLoad task = _lastTask;
if (task != null) {
Util.d("Cancelling fetches");
task.cancel(true);
}
}
/**
* This should always be a content url
*/
void deleteCurrentPageCache(WebView view, String url) {
Uri uri = Uri.parse(url);
if (CONTENT.equals(uri.getScheme())) {
try {
//reverse back to a i2p URI so we can delete it from the AppCache
uri = CacheProvider.getI2PUri(uri);
Util.d("clearing AppCache entry for current page " + uri);
AppCache.getInstance(view.getContext()).removeCacheFile(uri);
} catch (FileNotFoundException fnfe) {
// this actually only deletes the row in the provider,
// not the actual file, but it will be overwritten in the reload.
Util.d("clearing provider entry for current page " + url);
view.getContext().getContentResolver().delete(uri, null, null);
}
}
}
private abstract static class BGLoad extends AsyncTask<String, Integer, Integer> implements DialogInterface.OnCancelListener {
protected final WebView _view;
protected final ProgressDialog _dialog;
public BGLoad(WebView view, ProgressDialog dialog) {
_view = view;
if (dialog != null)
dialog.setCancelable(true);
_dialog = dialog;
}
@Override
protected void onPostExecute(Integer result) {
if (_dialog != null && _dialog.isShowing()) {
// since webkit is just going to sit there...
try {
_dialog.setTitle("Downloading...");
_dialog.setMessage("...CSS and images...");
} catch (Exception e) {}
}
}
@Override
protected void onCancelled() {
dismiss();
}
private void dismiss() {
if (_dialog != null && _dialog.isShowing()) {
try {
// throws IAE - not attached to window manager - on screen rotation
// isShowing() may cover it though.
_dialog.dismiss();
} catch (Exception e) {}
}
}
/** cancel listener */
public void onCancel(DialogInterface dialog) {
cancel(true);
}
}
private static class BackgroundLoad extends BGLoad {
public BackgroundLoad(WebView view) {
super(view, null);
}
protected Integer doInBackground(final String... urls) {
publishProgress(-1);
_view.post(new Runnable() {
@Override
public void run() {
_view.loadUrl(urls[0]);
}
});
return 0;
}
@Override
protected void onProgressUpdate(Integer... progress) {
//if (isCancelled())
// return;
//if (progress[0].intValue() < 0) {
// _dialog = ProgressDialog.show(_view.getContext(), "Loading", "some url");
// _dialog.setOnCancelListener(this);
// _dialog.setCancelable(true);
//}
}
}
// http://stackoverflow.com/questions/3961589/android-webview-and-loaddata
private static final String XML_HEADER = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n";
private static class BackgroundEepLoad extends BGLoad implements EepGet.StatusListener {
private final String _host;
private int _total;
public BackgroundEepLoad(WebView view, String host, ProgressDialog dialog) {
super(view, dialog);
_host = host;
}
protected Integer doInBackground(String... urls) {
final String url = urls[0];
Uri uri = Uri.parse(url);
File cacheFile = AppCache.getInstance(_view.getContext()).getCacheFile(uri);
if (cacheFile.exists()) {
final Uri resUri = AppCache.getInstance(_view.getContext()).getCacheUri(uri);
Util.d("Loading " + url + " from resource cache " + resUri);
_view.post(new Runnable() {
@Override
public void run() {
_view.getSettings().setLoadsImagesAutomatically(true);
_view.getSettings().setBlockNetworkLoads(false);
_view.loadUrl(resUri.toString());
}
});
// 1 means show the cache toast message
return 1;
}
publishProgress(-1);
//EepGetFetcher fetcher = new EepGetFetcher(url);
OutputStream out = null;
try {
out = AppCache.getInstance(_view.getContext()).createCacheFile(uri);
// write error to stream
EepGetFetcher fetcher = new EepGetFetcher(url, out, true);
fetcher.addStatusListener(this);
boolean success = fetcher.fetch();
if (isCancelled()) {
Util.d("Fetch cancelled for " + url);
return 0;
}
try { out.close(); } catch (IOException ioe) {}
if (success) {
// store in cache, get content URL, and load that way
// Set as current base
final Uri content = AppCache.getInstance(_view.getContext()).addCacheFile(uri, true);
if (content != null) {
Util.d("Stored cache in " + content);
} else {
AppCache.getInstance(_view.getContext()).removeCacheFile(uri);
Util.d("cache create error");
return 0;
}
Util.d("loading data, base URL: " + uri + " content URL: " + content);
_view.post(new Runnable() {
@Override
public void run() {
_view.loadUrl(content.toString());
}
});
Util.d("Fetch failed for " + url);
} else {
// Load the error message in as a string, delete the file
final String t = fetcher.getContentType();
final String e = fetcher.getEncoding();
String msg;
int statusCode = fetcher.getStatusCode();
if (statusCode < 0) {
msg = HEADER + ERROR_URL + "<a href=\"" + url + "\">" + url +
"</a></p>" + ERROR_ROUTER + FOOTER;
} else if (cacheFile.length() <= 0) {
msg = HEADER + ERROR_URL + "<a href=\"" + url + "\">" + url +
"</a> No data returned, error code: " + statusCode +
"</p>" + FOOTER;
} else {
InputStream fis = null;
try {
fis = new FileInputStream(cacheFile);
byte[] data = new byte[(int) cacheFile.length()];
DataHelper.read(fis, data);
msg = new String(data, e);
} catch (IOException ioe) {
Util.d("WVC", ioe);
msg = HEADER + "I/O error" + FOOTER;
} finally {
if (fis != null) try { fis.close(); } catch (IOException ioe) {}
}
}
AppCache.getInstance(_view.getContext()).removeCacheFile(uri);
Util.d("loading error data URL: " + url);
final String finalMsg = msg;
_view.post(new Runnable() {
@Override
public void run() {
_view.loadDataWithBaseURL(url, finalMsg, t, e, url);
}
});
}
} catch (IOException ioe) {
Util.d("IOE for " + url, ioe);
} finally {
if (out != null) try { out.close(); } catch (IOException ioe) {}
}
return 0;
}
@Override
protected void onProgressUpdate(Integer... progress) {
if (isCancelled())
return;
int prog = progress[0];
if (prog < 0) {
_dialog.setTitle("Contacting...");
_dialog.setMessage(_host);
_dialog.setIndeterminate(true);
_dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
_dialog.setOnCancelListener(this);
_dialog.show();
} else if (prog == 0 && _total > 0) {
_dialog.setTitle("Downloading...");
_dialog.setMessage("...from " + _host);
_dialog.setIndeterminate(false);
_dialog.setMax(_total);
_dialog.setProgress(0);
} else if (_total > 0) {
// so it isn't at 100% while loading images and CSS
_dialog.setProgress(Math.min(prog, _total * 99 / 100));
} else if (prog > 0) {
// ugly, need custom
_dialog.setTitle("Downloading...");
_dialog.setMessage("...from " + _host + ": " + DataHelper.formatSize(prog) + 'B');
//_dialog.setProgress(prog);
} else {
// nothing
}
}
@Override
protected void onPostExecute(Integer result) {
if (result.equals(Integer.valueOf(1))) {
Toast toast = Toast.makeText(_view.getContext(), "Loading from cache, click settings to reload", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
super.onPostExecute(result);
}
// EepGet callbacks
public void attemptFailed(String url, long bytesTransferred, long bytesRemaining, int currentAttempt, int numRetries, Exception cause) {}
public void bytesTransferred(long alreadyTransferred, int currentWrite, long bytesTransferred, long bytesRemaining, String url) {
publishProgress(Math.max(0, (int) (alreadyTransferred + bytesTransferred)));
}
public void transferComplete(long alreadyTransferred, long bytesTransferred, long bytesRemaining, String url, String outputFile, boolean notModified) {}
public void transferFailed(String url, long bytesTransferred, long bytesRemaining, int currentAttempt) {}
public void headerReceived(String url, int attemptNum, String key, String val) {
if (key.equalsIgnoreCase("Content-Length")) {
try {
_total = Integer.parseInt(val.trim());
publishProgress(0);
} catch (NumberFormatException nfe) {}
}
}
public void attempting(String url) {}
}
}