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