19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1700b74270c9f136a8727c5f6cda0997a3a905f385Mike Lockwoodpackage com.android.server.location; 1800b74270c9f136a8727c5f6cda0997a3a905f385Mike Lockwood 1900b74270c9f136a8727c5f6cda0997a3a905f385Mike Lockwoodimport android.content.Context; 2000b74270c9f136a8727c5f6cda0997a3a905f385Mike Lockwoodimport android.net.Proxy; 2100b74270c9f136a8727c5f6cda0997a3a905f385Mike Lockwoodimport android.net.http.AndroidHttpClient; 2200b74270c9f136a8727c5f6cda0997a3a905f385Mike Lockwoodimport android.util.Log; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.apache.http.HttpEntity; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.apache.http.HttpHost; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.apache.http.HttpResponse; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.apache.http.StatusLine; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.apache.http.client.HttpClient; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.apache.http.client.methods.HttpGet; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.apache.http.client.methods.HttpUriRequest; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.apache.http.conn.params.ConnRouteParams; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.DataInputStream; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.IOException; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.Properties; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.Random; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A class for downloading GPS XTRA data. 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@hide} 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class GpsXtraDownloader { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String TAG = "GpsXtraDownloader"; 46431bb2269532f2514861b908d5fafda8fa64da79Joe Onorato static final boolean DEBUG = false; 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Context mContext; 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private String[] mXtraServers; 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // to load balance our server requests 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mNextServerIndex; 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project GpsXtraDownloader(Context context, Properties properties) { 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContext = context; 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // read XTRA servers from the Properties object 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = 0; 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String server1 = properties.getProperty("XTRA_SERVER_1"); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String server2 = properties.getProperty("XTRA_SERVER_2"); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String server3 = properties.getProperty("XTRA_SERVER_3"); 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (server1 != null) count++; 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (server2 != null) count++; 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (server3 != null) count++; 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count == 0) { 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "No XTRA servers were specified in the GPS configuration"); 677b0b1ed979aa665175bf3952c8902ce13c763ab8The Android Open Source Project return; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mXtraServers = new String[count]; 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project count = 0; 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (server1 != null) mXtraServers[count++] = server1; 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (server2 != null) mXtraServers[count++] = server2; 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (server3 != null) mXtraServers[count++] = server3; 74b8526bfe091d4a5948f6e3165357bb9bd4bfebbfMike Lockwood 75b8526bfe091d4a5948f6e3165357bb9bd4bfebbfMike Lockwood // randomize first server 76b8526bfe091d4a5948f6e3165357bb9bd4bfebbfMike Lockwood Random random = new Random(); 77b8526bfe091d4a5948f6e3165357bb9bd4bfebbfMike Lockwood mNextServerIndex = random.nextInt(count); 78b8526bfe091d4a5948f6e3165357bb9bd4bfebbfMike Lockwood } 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte[] downloadXtraData() { 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String proxyHost = Proxy.getHost(mContext); 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int proxyPort = Proxy.getPort(mContext); 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean useProxy = (proxyHost != null && proxyPort != -1); 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte[] result = null; 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int startIndex = mNextServerIndex; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mXtraServers == null) { 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // load balance our requests among the available servers 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (result == null) { 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result = doDownload(mXtraServers[mNextServerIndex], useProxy, proxyHost, proxyPort); 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // increment mNextServerIndex and wrap around if necessary 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNextServerIndex++; 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNextServerIndex == mXtraServers.length) { 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNextServerIndex = 0; 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // break if we have tried all the servers 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNextServerIndex == startIndex) break; 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return result; 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected static byte[] doDownload(String url, boolean isProxySet, 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String proxyHost, int proxyPort) { 110431bb2269532f2514861b908d5fafda8fa64da79Joe Onorato if (DEBUG) Log.d(TAG, "Downloading XTRA data from " + url); 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project AndroidHttpClient client = null; 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project client = AndroidHttpClient.newInstance("Android"); 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project HttpUriRequest req = new HttpGet(url); 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isProxySet) { 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project HttpHost proxy = new HttpHost(proxyHost, proxyPort); 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ConnRouteParams.setDefaultProxy(req.getParams(), proxy); 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project req.addHeader( 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Accept", 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "*/*, application/vnd.wap.mms-message, application/vnd.wap.sic"); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project req.addHeader( 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "x-wap-profile", 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "http://www.openmobilealliance.org/tech/profiles/UAPROF/ccppschema-20021212#"); 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project HttpResponse response = client.execute(req); 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project StatusLine status = response.getStatusLine(); 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (status.getStatusCode() != 200) { // HTTP 200 is success. 133431bb2269532f2514861b908d5fafda8fa64da79Joe Onorato if (DEBUG) Log.d(TAG, "HTTP error: " + status.getReasonPhrase()); 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project HttpEntity entity = response.getEntity(); 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte[] body = null; 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (entity != null) { 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (entity.getContentLength() > 0) { 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project body = new byte[(int) entity.getContentLength()]; 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project DataInputStream dis = new DataInputStream(entity.getContent()); 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dis.readFully(body); 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dis.close(); 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException e) { 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Unexpected IOException.", e); 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (entity != null) { 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entity.consumeContent(); 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return body; 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (Exception e) { 162431bb2269532f2514861b908d5fafda8fa64da79Joe Onorato if (DEBUG) Log.d(TAG, "error " + e); 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (client != null) { 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project client.close(); 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 172