1package eu.siacs.conversations.http;
2
3import android.os.PowerManager;
4import android.util.Log;
5
6import java.io.BufferedInputStream;
7import java.io.IOException;
8import java.io.InputStream;
9import java.io.OutputStream;
10import java.net.HttpURLConnection;
11import java.net.MalformedURLException;
12import java.net.URL;
13import java.util.concurrent.CancellationException;
14
15import javax.net.ssl.HttpsURLConnection;
16import javax.net.ssl.SSLHandshakeException;
17
18import eu.siacs.conversations.Config;
19import eu.siacs.conversations.R;
20import eu.siacs.conversations.entities.DownloadableFile;
21import eu.siacs.conversations.entities.Message;
22import eu.siacs.conversations.entities.Transferable;
23import eu.siacs.conversations.entities.TransferablePlaceholder;
24import eu.siacs.conversations.persistance.FileBackend;
25import eu.siacs.conversations.services.AbstractConnectionManager;
26import eu.siacs.conversations.services.XmppConnectionService;
27import eu.siacs.conversations.utils.CryptoHelper;
28
29public class HttpDownloadConnection implements Transferable {
30
31 private HttpConnectionManager mHttpConnectionManager;
32 private XmppConnectionService mXmppConnectionService;
33
34 private URL mUrl;
35 private Message message;
36 private DownloadableFile file;
37 private int mStatus = Transferable.STATUS_UNKNOWN;
38 private boolean acceptedAutomatically = false;
39 private int mProgress = 0;
40 private boolean mUseTor = false;
41 private boolean canceled = false;
42
43 public HttpDownloadConnection(HttpConnectionManager manager) {
44 this.mHttpConnectionManager = manager;
45 this.mXmppConnectionService = manager.getXmppConnectionService();
46 this.mUseTor = mXmppConnectionService.useTorToConnect();
47 }
48
49 @Override
50 public boolean start() {
51 if (mXmppConnectionService.hasInternetConnection()) {
52 if (this.mStatus == STATUS_OFFER_CHECK_FILESIZE) {
53 checkFileSize(true);
54 } else {
55 new Thread(new FileDownloader(true)).start();
56 }
57 return true;
58 } else {
59 return false;
60 }
61 }
62
63 public void init(Message message) {
64 init(message, false);
65 }
66
67 public void init(Message message, boolean interactive) {
68 this.message = message;
69 this.message.setTransferable(this);
70 try {
71 if (message.hasFileOnRemoteHost()) {
72 mUrl = message.getFileParams().url;
73 } else {
74 mUrl = new URL(message.getBody());
75 }
76 String[] parts = mUrl.getPath().toLowerCase().split("\\.");
77 String lastPart = parts.length >= 1 ? parts[parts.length - 1] : null;
78 String secondToLast = parts.length >= 2 ? parts[parts.length -2] : null;
79 if ("pgp".equals(lastPart) || "gpg".equals(lastPart)) {
80 this.message.setEncryption(Message.ENCRYPTION_PGP);
81 } else if (message.getEncryption() != Message.ENCRYPTION_OTR
82 && message.getEncryption() != Message.ENCRYPTION_AXOLOTL) {
83 this.message.setEncryption(Message.ENCRYPTION_NONE);
84 }
85 String extension;
86 if (VALID_CRYPTO_EXTENSIONS.contains(lastPart)) {
87 extension = secondToLast;
88 } else {
89 extension = lastPart;
90 }
91 message.setRelativeFilePath(message.getUuid() + "." + extension);
92 this.file = mXmppConnectionService.getFileBackend().getFile(message, false);
93 String reference = mUrl.getRef();
94 if (reference != null && reference.length() == 96) {
95 this.file.setKeyAndIv(CryptoHelper.hexToBytes(reference));
96 }
97
98 if ((this.message.getEncryption() == Message.ENCRYPTION_OTR
99 || this.message.getEncryption() == Message.ENCRYPTION_AXOLOTL)
100 && this.file.getKey() == null) {
101 this.message.setEncryption(Message.ENCRYPTION_NONE);
102 }
103 checkFileSize(interactive);
104 } catch (MalformedURLException e) {
105 this.cancel();
106 }
107 }
108
109 private void checkFileSize(boolean interactive) {
110 new Thread(new FileSizeChecker(interactive)).start();
111 }
112
113 @Override
114 public void cancel() {
115 this.canceled = true;
116 mHttpConnectionManager.finishConnection(this);
117 if (message.isFileOrImage()) {
118 message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
119 } else {
120 message.setTransferable(null);
121 }
122 mXmppConnectionService.updateConversationUi();
123 }
124
125 private void finish() {
126 mXmppConnectionService.getFileBackend().updateMediaScanner(file);
127 message.setTransferable(null);
128 mHttpConnectionManager.finishConnection(this);
129 boolean notify = acceptedAutomatically && !message.isRead();
130 if (message.getEncryption() == Message.ENCRYPTION_PGP) {
131 notify = message.getConversation().getAccount().getPgpDecryptionService().decrypt(message, notify);
132 }
133 mXmppConnectionService.updateConversationUi();
134 if (notify) {
135 mXmppConnectionService.getNotificationService().push(message);
136 }
137 }
138
139 private void changeStatus(int status) {
140 this.mStatus = status;
141 mXmppConnectionService.updateConversationUi();
142 }
143
144 private class WriteException extends IOException {
145
146 }
147
148 private void showToastForException(Exception e) {
149 if (e instanceof java.net.UnknownHostException) {
150 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_server_not_found);
151 } else if (e instanceof java.net.ConnectException) {
152 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_could_not_connect);
153 } else if (e instanceof WriteException) {
154 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_could_not_write_file);
155 } else if (!(e instanceof CancellationException)) {
156 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_file_not_found);
157 }
158 }
159
160 private class FileSizeChecker implements Runnable {
161
162 private boolean interactive = false;
163
164 public FileSizeChecker(boolean interactive) {
165 this.interactive = interactive;
166 }
167
168 @Override
169 public void run() {
170 long size;
171 try {
172 size = retrieveFileSize();
173 } catch (Exception e) {
174 changeStatus(STATUS_OFFER_CHECK_FILESIZE);
175 Log.d(Config.LOGTAG, "io exception in http file size checker: " + e.getMessage());
176 if (interactive) {
177 showToastForException(e);
178 } else {
179 HttpDownloadConnection.this.acceptedAutomatically = false;
180 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
181 }
182 cancel();
183 return;
184 }
185 file.setExpectedSize(size);
186 if (mHttpConnectionManager.hasStoragePermission() && size <= mHttpConnectionManager.getAutoAcceptFileSize()) {
187 HttpDownloadConnection.this.acceptedAutomatically = true;
188 new Thread(new FileDownloader(interactive)).start();
189 } else {
190 changeStatus(STATUS_OFFER);
191 HttpDownloadConnection.this.acceptedAutomatically = false;
192 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
193 }
194 }
195
196 private long retrieveFileSize() throws IOException {
197 try {
198 Log.d(Config.LOGTAG, "retrieve file size. interactive:" + String.valueOf(interactive));
199 changeStatus(STATUS_CHECKING);
200 HttpURLConnection connection;
201 if (mUseTor) {
202 connection = (HttpURLConnection) mUrl.openConnection(mHttpConnectionManager.getProxy());
203 } else {
204 connection = (HttpURLConnection) mUrl.openConnection();
205 }
206 connection.setRequestMethod("HEAD");
207 Log.d(Config.LOGTAG,"url: "+connection.getURL().toString());
208 Log.d(Config.LOGTAG,"connection: "+connection.toString());
209 connection.setRequestProperty("User-Agent", mXmppConnectionService.getIqGenerator().getIdentityName());
210 if (connection instanceof HttpsURLConnection) {
211 mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
212 }
213 connection.connect();
214 String contentLength = connection.getHeaderField("Content-Length");
215 connection.disconnect();
216 if (contentLength == null) {
217 throw new IOException("no content-length found in HEAD response");
218 }
219 return Long.parseLong(contentLength, 10);
220 } catch (IOException e) {
221 throw e;
222 } catch (NumberFormatException e) {
223 throw new IOException();
224 }
225 }
226
227 }
228
229 private class FileDownloader implements Runnable {
230
231 private boolean interactive = false;
232
233 private OutputStream os;
234
235 public FileDownloader(boolean interactive) {
236 this.interactive = interactive;
237 }
238
239 @Override
240 public void run() {
241 try {
242 changeStatus(STATUS_DOWNLOADING);
243 download();
244 updateImageBounds();
245 finish();
246 } catch (SSLHandshakeException e) {
247 changeStatus(STATUS_OFFER);
248 } catch (Exception e) {
249 if (interactive) {
250 showToastForException(e);
251 } else {
252 HttpDownloadConnection.this.acceptedAutomatically = false;
253 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
254 }
255 cancel();
256 }
257 }
258
259 private void download() throws Exception {
260 InputStream is = null;
261 PowerManager.WakeLock wakeLock = mHttpConnectionManager.createWakeLock("http_download_"+message.getUuid());
262 try {
263 wakeLock.acquire();
264 HttpURLConnection connection;
265 if (mUseTor) {
266 connection = (HttpURLConnection) mUrl.openConnection(mHttpConnectionManager.getProxy());
267 } else {
268 connection = (HttpURLConnection) mUrl.openConnection();
269 }
270 if (connection instanceof HttpsURLConnection) {
271 mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
272 }
273 connection.setRequestProperty("User-Agent",mXmppConnectionService.getIqGenerator().getIdentityName());
274 final boolean tryResume = file.exists() && file.getKey() == null;
275 if (tryResume) {
276 Log.d(Config.LOGTAG,"http download trying resume");
277 long size = file.getSize();
278 connection.setRequestProperty("Range", "bytes="+size+"-");
279 }
280 connection.connect();
281 is = new BufferedInputStream(connection.getInputStream());
282 boolean serverResumed = "bytes".equals(connection.getHeaderField("Accept-Ranges"));
283 long transmitted = 0;
284 long expected = file.getExpectedSize();
285 if (tryResume && serverResumed) {
286 Log.d(Config.LOGTAG,"server resumed");
287 transmitted = file.getSize();
288 updateProgress((int) ((((double) transmitted) / expected) * 100));
289 os = AbstractConnectionManager.createAppendedOutputStream(file);
290 } else {
291 file.getParentFile().mkdirs();
292 file.createNewFile();
293 os = AbstractConnectionManager.createOutputStream(file, true);
294 }
295 int count;
296 byte[] buffer = new byte[1024];
297 while ((count = is.read(buffer)) != -1) {
298 transmitted += count;
299 try {
300 os.write(buffer, 0, count);
301 } catch (IOException e) {
302 throw new WriteException();
303 }
304 updateProgress((int) ((((double) transmitted) / expected) * 100));
305 if (canceled) {
306 throw new CancellationException();
307 }
308 }
309 try {
310 os.flush();
311 } catch (IOException e) {
312 throw new WriteException();
313 }
314 } catch (CancellationException | IOException e) {
315 throw e;
316 } finally {
317 FileBackend.close(os);
318 FileBackend.close(is);
319 wakeLock.release();
320 }
321 }
322
323 private void updateImageBounds() {
324 message.setType(Message.TYPE_FILE);
325 mXmppConnectionService.getFileBackend().updateFileParams(message, mUrl);
326 mXmppConnectionService.updateMessage(message);
327 }
328
329 }
330
331 public void updateProgress(int i) {
332 this.mProgress = i;
333 mXmppConnectionService.updateConversationUi();
334 }
335
336 @Override
337 public int getStatus() {
338 return this.mStatus;
339 }
340
341 @Override
342 public long getFileSize() {
343 if (this.file != null) {
344 return this.file.getExpectedSize();
345 } else {
346 return 0;
347 }
348 }
349
350 @Override
351 public int getProgress() {
352 return this.mProgress;
353 }
354}