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