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