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.MalformedURLException;
14import java.net.URL;
15import java.util.Arrays;
16
17import javax.net.ssl.HttpsURLConnection;
18import javax.net.ssl.SSLHandshakeException;
19
20import eu.siacs.conversations.Config;
21import eu.siacs.conversations.R;
22import eu.siacs.conversations.entities.DownloadableFile;
23import eu.siacs.conversations.entities.Message;
24import eu.siacs.conversations.entities.Transferable;
25import eu.siacs.conversations.persistance.FileBackend;
26import eu.siacs.conversations.services.AbstractConnectionManager;
27import eu.siacs.conversations.services.XmppConnectionService;
28import eu.siacs.conversations.utils.CryptoHelper;
29
30public class HttpDownloadConnection implements Transferable {
31
32 private HttpConnectionManager mHttpConnectionManager;
33 private XmppConnectionService mXmppConnectionService;
34
35 private URL mUrl;
36 private Message message;
37 private DownloadableFile file;
38 private int mStatus = Transferable.STATUS_UNKNOWN;
39 private boolean acceptedAutomatically = false;
40 private int mProgress = 0;
41
42 public HttpDownloadConnection(HttpConnectionManager manager) {
43 this.mHttpConnectionManager = manager;
44 this.mXmppConnectionService = manager.getXmppConnectionService();
45 }
46
47 @Override
48 public boolean start() {
49 if (mXmppConnectionService.hasInternetConnection()) {
50 if (this.mStatus == STATUS_OFFER_CHECK_FILESIZE) {
51 checkFileSize(true);
52 } else {
53 new Thread(new FileDownloader(true)).start();
54 }
55 return true;
56 } else {
57 return false;
58 }
59 }
60
61 public void init(Message message) {
62 init(message, false);
63 }
64
65 public void init(Message message, boolean interactive) {
66 this.message = message;
67 this.message.setTransferable(this);
68 try {
69 mUrl = new URL(message.getBody());
70 String[] parts = mUrl.getPath().toLowerCase().split("\\.");
71 String lastPart = parts.length >= 1 ? parts[parts.length - 1] : null;
72 String secondToLast = parts.length >= 2 ? parts[parts.length -2] : null;
73 if ("pgp".equals(lastPart) || "gpg".equals(lastPart)) {
74 this.message.setEncryption(Message.ENCRYPTION_PGP);
75 } else if (message.getEncryption() != Message.ENCRYPTION_OTR
76 && message.getEncryption() != Message.ENCRYPTION_AXOLOTL) {
77 this.message.setEncryption(Message.ENCRYPTION_NONE);
78 }
79 String extension;
80 if (Arrays.asList(VALID_CRYPTO_EXTENSIONS).contains(lastPart)) {
81 extension = secondToLast;
82 } else {
83 extension = lastPart;
84 }
85 message.setRelativeFilePath(message.getUuid()+"."+extension);
86 this.file = mXmppConnectionService.getFileBackend().getFile(message, false);
87 String reference = mUrl.getRef();
88 if (reference != null && reference.length() == 96) {
89 this.file.setKeyAndIv(CryptoHelper.hexToBytes(reference));
90 }
91
92 if ((this.message.getEncryption() == Message.ENCRYPTION_OTR
93 || this.message.getEncryption() == Message.ENCRYPTION_AXOLOTL)
94 && this.file.getKey() == null) {
95 this.message.setEncryption(Message.ENCRYPTION_NONE);
96 }
97 checkFileSize(interactive);
98 } catch (MalformedURLException e) {
99 this.cancel();
100 }
101 }
102
103 private void checkFileSize(boolean interactive) {
104 new Thread(new FileSizeChecker(interactive)).start();
105 }
106
107 public void cancel() {
108 mHttpConnectionManager.finishConnection(this);
109 message.setTransferable(null);
110 mXmppConnectionService.updateConversationUi();
111 }
112
113 private void finish() {
114 Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
115 intent.setData(Uri.fromFile(file));
116 mXmppConnectionService.sendBroadcast(intent);
117 message.setTransferable(null);
118 mHttpConnectionManager.finishConnection(this);
119 mXmppConnectionService.updateConversationUi();
120 if (acceptedAutomatically) {
121 mXmppConnectionService.getNotificationService().push(message);
122 }
123 }
124
125 private void changeStatus(int status) {
126 this.mStatus = status;
127 mXmppConnectionService.updateConversationUi();
128 }
129
130 private void showToastForException(Exception e) {
131 e.printStackTrace();
132 if (e instanceof java.net.UnknownHostException) {
133 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_server_not_found);
134 } else if (e instanceof java.net.ConnectException) {
135 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_could_not_connect);
136 } else {
137 mXmppConnectionService.showErrorToastInUi(R.string.download_failed_file_not_found);
138 }
139 }
140
141 private class FileSizeChecker implements Runnable {
142
143 private boolean interactive = false;
144
145 public FileSizeChecker(boolean interactive) {
146 this.interactive = interactive;
147 }
148
149 @Override
150 public void run() {
151 long size;
152 try {
153 size = retrieveFileSize();
154 } catch (SSLHandshakeException e) {
155 changeStatus(STATUS_OFFER_CHECK_FILESIZE);
156 HttpDownloadConnection.this.acceptedAutomatically = false;
157 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
158 return;
159 } catch (IOException e) {
160 Log.d(Config.LOGTAG, "io exception in http file size checker: " + e.getMessage());
161 if (interactive) {
162 showToastForException(e);
163 }
164 cancel();
165 return;
166 }
167 file.setExpectedSize(size);
168 if (size <= mHttpConnectionManager.getAutoAcceptFileSize()) {
169 HttpDownloadConnection.this.acceptedAutomatically = true;
170 new Thread(new FileDownloader(interactive)).start();
171 } else {
172 changeStatus(STATUS_OFFER);
173 HttpDownloadConnection.this.acceptedAutomatically = false;
174 HttpDownloadConnection.this.mXmppConnectionService.getNotificationService().push(message);
175 }
176 }
177
178 private long retrieveFileSize() throws IOException {
179 try {
180 Log.d(Config.LOGTAG, "retrieve file size. interactive:" + String.valueOf(interactive));
181 changeStatus(STATUS_CHECKING);
182 HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
183 connection.setRequestMethod("HEAD");
184 if (connection instanceof HttpsURLConnection) {
185 mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
186 }
187 connection.connect();
188 String contentLength = connection.getHeaderField("Content-Length");
189 connection.disconnect();
190 if (contentLength == null) {
191 throw new IOException();
192 }
193 return Long.parseLong(contentLength, 10);
194 } catch (IOException e) {
195 throw e;
196 } catch (NumberFormatException e) {
197 throw new IOException();
198 }
199 }
200
201 }
202
203 private class FileDownloader implements Runnable {
204
205 private boolean interactive = false;
206
207 private OutputStream os;
208
209 public FileDownloader(boolean interactive) {
210 this.interactive = interactive;
211 }
212
213 @Override
214 public void run() {
215 try {
216 changeStatus(STATUS_DOWNLOADING);
217 download();
218 updateImageBounds();
219 finish();
220 } catch (SSLHandshakeException e) {
221 changeStatus(STATUS_OFFER);
222 } catch (IOException e) {
223 if (interactive) {
224 showToastForException(e);
225 }
226 cancel();
227 }
228 }
229
230 private void download() throws IOException {
231 InputStream is = null;
232 PowerManager.WakeLock wakeLock = mHttpConnectionManager.createWakeLock("http_download_"+message.getUuid());
233 try {
234 wakeLock.acquire();
235 HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
236 if (connection instanceof HttpsURLConnection) {
237 mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
238 }
239 connection.connect();
240 is = new BufferedInputStream(connection.getInputStream());
241 file.getParentFile().mkdirs();
242 file.createNewFile();
243 os = AbstractConnectionManager.createOutputStream(file, true);
244 long transmitted = 0;
245 long expected = file.getExpectedSize();
246 int count = -1;
247 byte[] buffer = new byte[1024];
248 while ((count = is.read(buffer)) != -1) {
249 transmitted += count;
250 os.write(buffer, 0, count);
251 updateProgress((int) ((((double) transmitted) / expected) * 100));
252 }
253 os.flush();
254 } catch (IOException e) {
255 throw e;
256 } finally {
257 FileBackend.close(os);
258 FileBackend.close(is);
259 wakeLock.release();
260 }
261 }
262
263 private void updateImageBounds() {
264 message.setType(Message.TYPE_FILE);
265 mXmppConnectionService.getFileBackend().updateFileParams(message, mUrl);
266 mXmppConnectionService.updateMessage(message);
267 }
268
269 }
270
271 public void updateProgress(int i) {
272 this.mProgress = i;
273 mXmppConnectionService.updateConversationUi();
274 }
275
276 @Override
277 public int getStatus() {
278 return this.mStatus;
279 }
280
281 @Override
282 public long getFileSize() {
283 if (this.file != null) {
284 return this.file.getExpectedSize();
285 } else {
286 return 0;
287 }
288 }
289
290 @Override
291 public int getProgress() {
292 return this.mProgress;
293 }
294}