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 if (message.getEncryption() == Message.ENCRYPTION_PGP) {
130 message.getConversation().getAccount().getPgpDecryptionService().add(message);
131 }
132 mXmppConnectionService.updateConversationUi();
133 if (acceptedAutomatically) {
134 mXmppConnectionService.getNotificationService().push(message);
135 }
136 }
137
138 private void changeStatus(int status) {
139 this.mStatus = status;
140 mXmppConnectionService.updateConversationUi();
141 }
142
143 private void showToastForException(Exception e) {
144 e.printStackTrace();
145 if (e instanceof java.net.UnknownHostException) {
146 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_server_not_found);
147 } else if (e instanceof java.net.ConnectException) {
148 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_could_not_connect);
149 } else if (!(e instanceof CancellationException)) {
150 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_file_not_found);
151 }
152 }
153
154 private class FileSizeChecker implements Runnable {
155
156 private boolean interactive = false;
157
158 public FileSizeChecker(boolean interactive) {
159 this.interactive = interactive;
160 }
161
162 @Override
163 public void run() {
164 long size;
165 try {
166 size = retrieveFileSize();
167 } catch (SSLHandshakeException e) {
168 changeStatus(STATUS_OFFER_CHECK_FILESIZE);
169 HttpDownloadConnection.this.acceptedAutomatically = false;
170 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
171 return;
172 } catch (IOException e) {
173 Log.d(Config.LOGTAG, "io exception in http file size checker: " + e.getMessage());
174 if (interactive) {
175 showToastForException(e);
176 }
177 cancel();
178 return;
179 }
180 file.setExpectedSize(size);
181 if (mHttpConnectionManager.hasStoragePermission() && size <= mHttpConnectionManager.getAutoAcceptFileSize()) {
182 HttpDownloadConnection.this.acceptedAutomatically = true;
183 new Thread(new FileDownloader(interactive)).start();
184 } else {
185 changeStatus(STATUS_OFFER);
186 HttpDownloadConnection.this.acceptedAutomatically = false;
187 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
188 }
189 }
190
191 private long retrieveFileSize() throws IOException {
192 try {
193 Log.d(Config.LOGTAG, "retrieve file size. interactive:" + String.valueOf(interactive));
194 changeStatus(STATUS_CHECKING);
195 HttpURLConnection connection;
196 if (mUseTor) {
197 connection = (HttpURLConnection) mUrl.openConnection(mHttpConnectionManager.getProxy());
198 } else {
199 connection = (HttpURLConnection) mUrl.openConnection();
200 }
201 connection.setRequestMethod("HEAD");
202 Log.d(Config.LOGTAG,"url: "+connection.getURL().toString());
203 Log.d(Config.LOGTAG,"connection: "+connection.toString());
204 connection.setRequestProperty("User-Agent", mXmppConnectionService.getIqGenerator().getIdentityName());
205 if (connection instanceof HttpsURLConnection) {
206 mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
207 }
208 connection.connect();
209 String contentLength = connection.getHeaderField("Content-Length");
210 connection.disconnect();
211 if (contentLength == null) {
212 throw new IOException();
213 }
214 return Long.parseLong(contentLength, 10);
215 } catch (IOException e) {
216 throw e;
217 } catch (NumberFormatException e) {
218 throw new IOException();
219 }
220 }
221
222 }
223
224 private class FileDownloader implements Runnable {
225
226 private boolean interactive = false;
227
228 private OutputStream os;
229
230 public FileDownloader(boolean interactive) {
231 this.interactive = interactive;
232 }
233
234 @Override
235 public void run() {
236 try {
237 changeStatus(STATUS_DOWNLOADING);
238 download();
239 updateImageBounds();
240 finish();
241 } catch (SSLHandshakeException e) {
242 changeStatus(STATUS_OFFER);
243 } catch (Exception e) {
244 if (interactive) {
245 showToastForException(e);
246 }
247 cancel();
248 }
249 }
250
251 private void download() throws Exception {
252 InputStream is = null;
253 PowerManager.WakeLock wakeLock = mHttpConnectionManager.createWakeLock("http_download_"+message.getUuid());
254 try {
255 wakeLock.acquire();
256 HttpURLConnection connection;
257 if (mUseTor) {
258 connection = (HttpURLConnection) mUrl.openConnection(mHttpConnectionManager.getProxy());
259 } else {
260 connection = (HttpURLConnection) mUrl.openConnection();
261 }
262 if (connection instanceof HttpsURLConnection) {
263 mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
264 }
265 connection.setRequestProperty("User-Agent",mXmppConnectionService.getIqGenerator().getIdentityName());
266 final boolean tryResume = file.exists() && file.getKey() == null;
267 if (tryResume) {
268 Log.d(Config.LOGTAG,"http download trying resume");
269 long size = file.getSize();
270 connection.setRequestProperty("Range", "bytes="+size+"-");
271 }
272 connection.connect();
273 is = new BufferedInputStream(connection.getInputStream());
274 boolean serverResumed = "bytes".equals(connection.getHeaderField("Accept-Ranges"));
275 long transmitted = 0;
276 long expected = file.getExpectedSize();
277 if (tryResume && serverResumed) {
278 Log.d(Config.LOGTAG,"server resumed");
279 transmitted = file.getSize();
280 updateProgress((int) ((((double) transmitted) / expected) * 100));
281 os = AbstractConnectionManager.createAppendedOutputStream(file);
282 } else {
283 file.getParentFile().mkdirs();
284 file.createNewFile();
285 os = AbstractConnectionManager.createOutputStream(file, true);
286 }
287 int count = -1;
288 byte[] buffer = new byte[1024];
289 while ((count = is.read(buffer)) != -1) {
290 transmitted += count;
291 os.write(buffer, 0, count);
292 updateProgress((int) ((((double) transmitted) / expected) * 100));
293 if (canceled) {
294 throw new CancellationException();
295 }
296 }
297 } catch (CancellationException | IOException e) {
298 throw e;
299 } finally {
300 if (os != null) {
301 try {
302 os.flush();
303 } catch (final IOException ignored) {
304
305 }
306 }
307 FileBackend.close(os);
308 FileBackend.close(is);
309 wakeLock.release();
310 }
311 }
312
313 private void updateImageBounds() {
314 message.setType(Message.TYPE_FILE);
315 mXmppConnectionService.getFileBackend().updateFileParams(message, mUrl);
316 mXmppConnectionService.updateMessage(message);
317 }
318
319 }
320
321 public void updateProgress(int i) {
322 this.mProgress = i;
323 mXmppConnectionService.updateConversationUi();
324 }
325
326 @Override
327 public int getStatus() {
328 return this.mStatus;
329 }
330
331 @Override
332 public long getFileSize() {
333 if (this.file != null) {
334 return this.file.getExpectedSize();
335 } else {
336 return 0;
337 }
338 }
339
340 @Override
341 public int getProgress() {
342 return this.mProgress;
343 }
344}