1package eu.siacs.conversations.http;
2
3import android.os.PowerManager;
4import android.support.annotation.Nullable;
5import android.util.Log;
6
7import com.google.common.io.ByteStreams;
8
9import java.io.BufferedInputStream;
10import java.io.FileInputStream;
11import java.io.IOException;
12import java.io.InputStream;
13import java.io.OutputStream;
14import java.net.HttpURLConnection;
15import java.net.MalformedURLException;
16import java.net.URL;
17import java.util.concurrent.CancellationException;
18
19import javax.net.ssl.HttpsURLConnection;
20import javax.net.ssl.SSLHandshakeException;
21
22import eu.siacs.conversations.Config;
23import eu.siacs.conversations.R;
24import eu.siacs.conversations.entities.Account;
25import eu.siacs.conversations.entities.DownloadableFile;
26import eu.siacs.conversations.entities.Message;
27import eu.siacs.conversations.entities.Transferable;
28import eu.siacs.conversations.persistance.FileBackend;
29import eu.siacs.conversations.services.AbstractConnectionManager;
30import eu.siacs.conversations.services.XmppConnectionService;
31import eu.siacs.conversations.utils.CryptoHelper;
32import eu.siacs.conversations.utils.FileWriterException;
33import eu.siacs.conversations.utils.WakeLockHelper;
34import eu.siacs.conversations.xmpp.OnIqPacketReceived;
35import eu.siacs.conversations.xmpp.stanzas.IqPacket;
36import rocks.xmpp.addr.Jid;
37
38public class HttpDownloadConnection implements Transferable {
39
40 private HttpConnectionManager mHttpConnectionManager;
41 private XmppConnectionService mXmppConnectionService;
42
43 private URL mUrl;
44 private final Message message;
45 private DownloadableFile file;
46 private int mStatus = Transferable.STATUS_UNKNOWN;
47 private boolean acceptedAutomatically = false;
48 private int mProgress = 0;
49 private final boolean mUseTor;
50 private boolean canceled = false;
51 private Method method = Method.HTTP_UPLOAD;
52
53 HttpDownloadConnection(Message message, HttpConnectionManager manager) {
54 this.message = message;
55 this.mHttpConnectionManager = manager;
56 this.mXmppConnectionService = manager.getXmppConnectionService();
57 this.mUseTor = mXmppConnectionService.useTorToConnect();
58 }
59
60 @Override
61 public boolean start() {
62 if (mXmppConnectionService.hasInternetConnection()) {
63 if (this.mStatus == STATUS_OFFER_CHECK_FILESIZE) {
64 checkFileSize(true);
65 } else {
66 download(true);
67 }
68 return true;
69 } else {
70 return false;
71 }
72 }
73
74 public void init(boolean interactive) {
75 this.message.setTransferable(this);
76 try {
77 if (message.hasFileOnRemoteHost()) {
78 mUrl = CryptoHelper.toHttpsUrl(message.getFileParams().url);
79 } else {
80 mUrl = CryptoHelper.toHttpsUrl(new URL(message.getBody().split("\n")[0]));
81 }
82 final AbstractConnectionManager.Extension extension = AbstractConnectionManager.Extension.of(mUrl.getPath());
83 if (VALID_CRYPTO_EXTENSIONS.contains(extension.main)) {
84 this.message.setEncryption(Message.ENCRYPTION_PGP);
85 } else if (message.getEncryption() != Message.ENCRYPTION_OTR
86 && message.getEncryption() != Message.ENCRYPTION_AXOLOTL) {
87 this.message.setEncryption(Message.ENCRYPTION_NONE);
88 }
89 final String ext;
90 if (VALID_CRYPTO_EXTENSIONS.contains(extension.main)) {
91 ext = extension.secondary;
92 } else {
93 ext = extension.main;
94 }
95 message.setRelativeFilePath(message.getUuid() + (ext != null ? ("." + ext) : ""));
96 if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
97 this.file = new DownloadableFile(mXmppConnectionService.getCacheDir().getAbsolutePath() + "/" + message.getUuid());
98 Log.d(Config.LOGTAG, "create temporary OMEMO encrypted file: " + this.file.getAbsolutePath() + "(" + message.getMimeType() + ")");
99 } else {
100 this.file = mXmppConnectionService.getFileBackend().getFile(message, false);
101 }
102 final String reference = mUrl.getRef();
103 if (reference != null && AesGcmURLStreamHandler.IV_KEY.matcher(reference).matches()) {
104 this.file.setKeyAndIv(CryptoHelper.hexToBytes(reference));
105 }
106
107 if (this.message.getEncryption() == Message.ENCRYPTION_AXOLOTL && this.file.getKey() == null) {
108 this.message.setEncryption(Message.ENCRYPTION_NONE);
109 }
110 method = mUrl.getProtocol().equalsIgnoreCase(P1S3UrlStreamHandler.PROTOCOL_NAME) ? Method.P1_S3 : Method.HTTP_UPLOAD;
111 long knownFileSize = message.getFileParams().size;
112 if (knownFileSize > 0 && interactive && method != Method.P1_S3) {
113 this.file.setExpectedSize(knownFileSize);
114 download(true);
115 } else {
116 checkFileSize(interactive);
117 }
118 } catch (MalformedURLException e) {
119 this.cancel();
120 }
121 }
122
123 private void download(boolean interactive) {
124 new Thread(new FileDownloader(interactive)).start();
125 }
126
127 private void checkFileSize(boolean interactive) {
128 new Thread(new FileSizeChecker(interactive)).start();
129 }
130
131 @Override
132 public void cancel() {
133 this.canceled = true;
134 mHttpConnectionManager.finishConnection(this);
135 message.setTransferable(null);
136 if (message.isFileOrImage()) {
137 message.setDeleted(true);
138 }
139 mHttpConnectionManager.updateConversationUi(true);
140 }
141
142 private void decryptOmemoFile() throws Exception {
143 final DownloadableFile outputFile = mXmppConnectionService.getFileBackend().getFile(message, true);
144
145 if (outputFile.getParentFile().mkdirs()) {
146 Log.d(Config.LOGTAG, "created parent directories for " + outputFile.getAbsolutePath());
147 }
148
149 try {
150 outputFile.createNewFile();
151 final InputStream is = new FileInputStream(this.file);
152
153 outputFile.setKey(this.file.getKey());
154 outputFile.setIv(this.file.getIv());
155 final OutputStream os = AbstractConnectionManager.createOutputStream(outputFile, false, true);
156
157 ByteStreams.copy(is, os);
158
159 FileBackend.close(is);
160 FileBackend.close(os);
161
162 if (!file.delete()) {
163 Log.w(Config.LOGTAG,"unable to delete temporary OMEMO encrypted file " + file.getAbsolutePath());
164 }
165
166 message.setRelativeFilePath(outputFile.getPath());
167 } catch (IOException e) {
168 message.setEncryption(Message.ENCRYPTION_DECRYPTION_FAILED);
169 mXmppConnectionService.updateMessage(message);
170 }
171 }
172
173 private void finish() throws Exception {
174 if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
175 decryptOmemoFile();
176 }
177 message.setTransferable(null);
178 mHttpConnectionManager.finishConnection(this);
179 boolean notify = acceptedAutomatically && !message.isRead();
180 if (message.getEncryption() == Message.ENCRYPTION_PGP) {
181 notify = message.getConversation().getAccount().getPgpDecryptionService().decrypt(message, notify);
182 }
183 mHttpConnectionManager.updateConversationUi(true);
184 final boolean notifyAfterScan = notify;
185 mXmppConnectionService.getFileBackend().updateMediaScanner(file, () -> {
186 if (notifyAfterScan) {
187 mXmppConnectionService.getNotificationService().push(message);
188 }
189 });
190 }
191
192 private void changeStatus(int status) {
193 this.mStatus = status;
194 mHttpConnectionManager.updateConversationUi(true);
195 }
196
197 private void showToastForException(Exception e) {
198 if (e instanceof java.net.UnknownHostException) {
199 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_server_not_found);
200 } else if (e instanceof java.net.ConnectException) {
201 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_could_not_connect);
202 } else if (e instanceof FileWriterException) {
203 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_could_not_write_file);
204 } else if (!(e instanceof CancellationException)) {
205 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_file_not_found);
206 }
207 }
208
209 private void updateProgress(long i) {
210 this.mProgress = (int) i;
211 mHttpConnectionManager.updateConversationUi(false);
212 }
213
214 @Override
215 public int getStatus() {
216 return this.mStatus;
217 }
218
219 @Override
220 public long getFileSize() {
221 if (this.file != null) {
222 return this.file.getExpectedSize();
223 } else {
224 return 0;
225 }
226 }
227
228 @Override
229 public int getProgress() {
230 return this.mProgress;
231 }
232
233 public Message getMessage() {
234 return message;
235 }
236
237 private class FileSizeChecker implements Runnable {
238
239 private final boolean interactive;
240
241 FileSizeChecker(boolean interactive) {
242 this.interactive = interactive;
243 }
244
245
246 @Override
247 public void run() {
248 if (mUrl.getProtocol().equalsIgnoreCase(P1S3UrlStreamHandler.PROTOCOL_NAME)) {
249 retrieveUrl();
250 } else {
251 check();
252 }
253 }
254
255 private void retrieveUrl() {
256 changeStatus(STATUS_CHECKING);
257 final Account account = message.getConversation().getAccount();
258 IqPacket request = mXmppConnectionService.getIqGenerator().requestP1S3Url(Jid.of(account.getJid().getDomain()), mUrl.getHost());
259 mXmppConnectionService.sendIqPacket(message.getConversation().getAccount(), request, (a, packet) -> {
260 if (packet.getType() == IqPacket.TYPE.RESULT) {
261 String download = packet.query().getAttribute("download");
262 if (download != null) {
263 try {
264 mUrl = new URL(download);
265 check();
266 return;
267 } catch (MalformedURLException e) {
268 //fallthrough
269 }
270 }
271 }
272 Log.d(Config.LOGTAG,"unable to retrieve actual download url");
273 retrieveFailed(null);
274 });
275 }
276
277 private void retrieveFailed(@Nullable Exception e) {
278 changeStatus(STATUS_OFFER_CHECK_FILESIZE);
279 if (interactive) {
280 if (e != null) {
281 showToastForException(e);
282 }
283 } else {
284 HttpDownloadConnection.this.acceptedAutomatically = false;
285 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
286 }
287 cancel();
288 }
289
290 private void check() {
291 long size;
292 try {
293 size = retrieveFileSize();
294 } catch (Exception e) {
295 Log.d(Config.LOGTAG, "io exception in http file size checker: " + e.getMessage());
296 retrieveFailed(e);
297 return;
298 }
299 file.setExpectedSize(size);
300 message.resetFileParams();
301 if (mHttpConnectionManager.hasStoragePermission()
302 && size <= mHttpConnectionManager.getAutoAcceptFileSize()
303 && mXmppConnectionService.isDataSaverDisabled()) {
304 HttpDownloadConnection.this.acceptedAutomatically = true;
305 download(interactive);
306 } else {
307 changeStatus(STATUS_OFFER);
308 HttpDownloadConnection.this.acceptedAutomatically = false;
309 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
310 }
311 }
312
313 private long retrieveFileSize() throws IOException {
314 try {
315 Log.d(Config.LOGTAG, "retrieve file size. interactive:" + String.valueOf(interactive));
316 changeStatus(STATUS_CHECKING);
317 HttpURLConnection connection;
318 final String hostname = mUrl.getHost();
319 final boolean onion = hostname != null && hostname.endsWith(".onion");
320 if (mUseTor || message.getConversation().getAccount().isOnion() || onion) {
321 connection = (HttpURLConnection) mUrl.openConnection(HttpConnectionManager.getProxy());
322 } else {
323 connection = (HttpURLConnection) mUrl.openConnection();
324 }
325 if (method == Method.P1_S3) {
326 connection.setRequestMethod("GET");
327 connection.addRequestProperty("Range","bytes=0-0");
328 } else {
329 connection.setRequestMethod("HEAD");
330 }
331 connection.setUseCaches(false);
332 Log.d(Config.LOGTAG, "url: " + connection.getURL().toString());
333 connection.setRequestProperty("User-Agent", mXmppConnectionService.getIqGenerator().getUserAgent());
334 if (connection instanceof HttpsURLConnection) {
335 mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
336 }
337 connection.setConnectTimeout(Config.SOCKET_TIMEOUT * 1000);
338 connection.setReadTimeout(Config.SOCKET_TIMEOUT * 1000);
339 connection.connect();
340 String contentLength;
341 if (method == Method.P1_S3) {
342 String contentRange = connection.getHeaderField("Content-Range");
343 String[] contentRangeParts = contentRange == null ? new String[0] : contentRange.split("/");
344 if (contentRangeParts.length != 2) {
345 contentLength = null;
346 } else {
347 contentLength = contentRangeParts[1];
348 }
349 } else {
350 contentLength = connection.getHeaderField("Content-Length");
351 }
352 connection.disconnect();
353 if (contentLength == null) {
354 throw new IOException("no content-length found in HEAD response");
355 }
356 return Long.parseLong(contentLength, 10);
357 } catch (IOException e) {
358 Log.d(Config.LOGTAG, "io exception during HEAD " + e.getMessage());
359 throw e;
360 } catch (NumberFormatException e) {
361 throw new IOException();
362 }
363 }
364
365 }
366
367 private class FileDownloader implements Runnable {
368
369 private final boolean interactive;
370
371 private OutputStream os;
372
373 public FileDownloader(boolean interactive) {
374 this.interactive = interactive;
375 }
376
377 @Override
378 public void run() {
379 try {
380 changeStatus(STATUS_DOWNLOADING);
381 download();
382 finish();
383 updateImageBounds();
384 } catch (SSLHandshakeException e) {
385 changeStatus(STATUS_OFFER);
386 } catch (Exception e) {
387 if (interactive) {
388 showToastForException(e);
389 } else {
390 HttpDownloadConnection.this.acceptedAutomatically = false;
391 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
392 }
393 cancel();
394 }
395 }
396
397 private void download() throws Exception {
398 InputStream is = null;
399 HttpURLConnection connection = null;
400 PowerManager.WakeLock wakeLock = mHttpConnectionManager.createWakeLock("http_download_" + message.getUuid());
401 try {
402 wakeLock.acquire();
403 if (mUseTor || message.getConversation().getAccount().isOnion()) {
404 connection = (HttpURLConnection) mUrl.openConnection(HttpConnectionManager.getProxy());
405 } else {
406 connection = (HttpURLConnection) mUrl.openConnection();
407 }
408 if (connection instanceof HttpsURLConnection) {
409 mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
410 }
411 connection.setUseCaches(false);
412 connection.setRequestProperty("User-Agent", mXmppConnectionService.getIqGenerator().getUserAgent());
413 final long expected = file.getExpectedSize();
414 final boolean tryResume = file.exists() && file.getSize() > 0 && file.getSize() < expected;
415 long resumeSize = 0;
416
417 if (tryResume) {
418 resumeSize = file.getSize();
419 Log.d(Config.LOGTAG, "http download trying resume after" + resumeSize + " of " + expected);
420 connection.setRequestProperty("Range", "bytes=" + resumeSize + "-");
421 }
422 connection.setConnectTimeout(Config.SOCKET_TIMEOUT * 1000);
423 connection.setReadTimeout(Config.SOCKET_TIMEOUT * 1000);
424 connection.connect();
425 is = new BufferedInputStream(connection.getInputStream());
426 final String contentRange = connection.getHeaderField("Content-Range");
427 boolean serverResumed = tryResume && contentRange != null && contentRange.startsWith("bytes " + resumeSize + "-");
428 long transmitted = 0;
429 if (tryResume && serverResumed) {
430 Log.d(Config.LOGTAG, "server resumed");
431 transmitted = file.getSize();
432 updateProgress(Math.round(((double) transmitted / expected) * 100));
433 os = AbstractConnectionManager.createOutputStream(file, true, false);
434 if (os == null) {
435 throw new FileWriterException();
436 }
437 } else {
438 long reportedContentLengthOnGet;
439 try {
440 reportedContentLengthOnGet = Long.parseLong(connection.getHeaderField("Content-Length"));
441 } catch (NumberFormatException | NullPointerException e) {
442 reportedContentLengthOnGet = 0;
443 }
444 if (expected != reportedContentLengthOnGet) {
445 Log.d(Config.LOGTAG, "content-length reported on GET (" + reportedContentLengthOnGet + ") did not match Content-Length reported on HEAD (" + expected + ")");
446 }
447 file.getParentFile().mkdirs();
448 if (!file.exists() && !file.createNewFile()) {
449 throw new FileWriterException();
450 }
451 os = AbstractConnectionManager.createOutputStream(file, false, false);
452 }
453 int count;
454 byte[] buffer = new byte[4096];
455 while ((count = is.read(buffer)) != -1) {
456 transmitted += count;
457 try {
458 os.write(buffer, 0, count);
459 } catch (IOException e) {
460 throw new FileWriterException();
461 }
462 updateProgress(Math.round(((double) transmitted / expected) * 100));
463 if (canceled) {
464 throw new CancellationException();
465 }
466 }
467 try {
468 os.flush();
469 } catch (IOException e) {
470 throw new FileWriterException();
471 }
472 } catch (CancellationException | IOException e) {
473 Log.d(Config.LOGTAG, "http download failed " + e.getMessage());
474 throw e;
475 } finally {
476 FileBackend.close(os);
477 FileBackend.close(is);
478 if (connection != null) {
479 connection.disconnect();
480 }
481 WakeLockHelper.release(wakeLock);
482 }
483 }
484
485 private void updateImageBounds() {
486 final boolean privateMessage = message.isPrivateMessage();
487 message.setType(privateMessage ? Message.TYPE_PRIVATE_FILE : Message.TYPE_FILE);
488 final URL url;
489 final String ref = mUrl.getRef();
490 if (method == Method.P1_S3) {
491 url = message.getFileParams().url;
492 } else if (ref != null && AesGcmURLStreamHandler.IV_KEY.matcher(ref).matches()) {
493 url = CryptoHelper.toAesGcmUrl(mUrl);
494 } else {
495 url = mUrl;
496 }
497 mXmppConnectionService.getFileBackend().updateFileParams(message, url);
498 mXmppConnectionService.updateMessage(message);
499 }
500
501 }
502}