Java tutorial
/* * Copyright (C) 2009 University of Washington * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package com.mpower.daktar.android.tasks; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.net.MalformedURLException; import java.net.URI; import java.net.URISyntaxException; import java.net.URL; import java.net.URLDecoder; import java.net.UnknownHostException; import java.nio.charset.Charset; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.http.Header; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpHead; import org.apache.http.client.methods.HttpPost; import org.apache.http.conn.ConnectTimeoutException; import org.apache.http.entity.mime.MultipartEntity; import org.apache.http.entity.mime.content.FileBody; import org.apache.http.entity.mime.content.StringBody; import org.apache.http.protocol.HTTP; import org.apache.http.protocol.HttpContext; import org.apache.http.util.EntityUtils; import android.content.ContentValues; import android.content.SharedPreferences; import android.database.Cursor; import android.net.Uri; import android.os.AsyncTask; import android.preference.PreferenceManager; import android.provider.BaseColumns; import android.util.Log; import android.webkit.MimeTypeMap; import com.mpower.daktar.android.application.MIntel; import com.mpower.daktar.android.listeners.InstanceUploaderListener; import com.mpower.daktar.android.preferences.PreferencesActivity; import com.mpower.daktar.android.provider.InstanceProviderAPI; import com.mpower.daktar.android.provider.InstanceProviderAPI.InstanceColumns; import com.mpower.daktar.android.utilities.WebUtils; import com.mpower.daktar.android.R; /** * Background task for uploading completed forms. * * @author Carl Hartung (carlhartung@gmail.com) */ public class InstanceUploaderTask extends AsyncTask<Long, Integer, HashMap<String, String>> { private static String t = "InstanceUploaderTask"; private InstanceUploaderListener mStateListener; private static final int CONNECTION_TIMEOUT = 30000; private static final String fail = "Error: "; private String mAuth = ""; private URI mAuthRequestingServer; HashMap<String, String> mResults; public void setAuth(final String auth) { mAuth = auth; } // TODO: This method is like 350 lines long, down from 400. // still. ridiculous. make it smaller. @Override protected HashMap<String, String> doInBackground(final Long... values) { mResults = new HashMap<String, String>(); String postResponse; String selection = BaseColumns._ID + "=?"; final String[] selectionArgs = new String[values.length]; for (int i = 0; i < values.length; i++) { if (i != values.length - 1) { selection += " or " + BaseColumns._ID + "=?"; } selectionArgs[i] = values[i].toString(); } // get shared HttpContext so that authentication and cookies are // retained. final HttpContext localContext = MIntel.getInstance().getHttpContext(); final HttpClient httpclient = WebUtils.createHttpClient(CONNECTION_TIMEOUT); final Map<URI, URI> uriRemap = new HashMap<URI, URI>(); final Cursor c = MIntel.getInstance().getContentResolver().query(InstanceColumns.CONTENT_URI, null, selection, selectionArgs, null); if (c.getCount() > 0) { c.moveToPosition(-1); next_submission: while (c.moveToNext()) { if (isCancelled()) return mResults; publishProgress(c.getPosition() + 1, c.getCount()); final String instance = c.getString(c.getColumnIndex(InstanceColumns.INSTANCE_FILE_PATH)); final String id = c.getString(c.getColumnIndex(BaseColumns._ID)); final Uri toUpdate = Uri.withAppendedPath(InstanceColumns.CONTENT_URI, id); String urlString = c.getString(c.getColumnIndex(InstanceColumns.SUBMISSION_URI)); if (urlString == null) { final SharedPreferences settings = PreferenceManager .getDefaultSharedPreferences(MIntel.getInstance()); urlString = settings.getString(PreferencesActivity.KEY_SERVER_URL, null); urlString = urlString + WebUtils.URL_PART_SUBMISSION; } final ContentValues cv = new ContentValues(); URI u = null; try { final URL url = new URL(URLDecoder.decode(urlString, "utf-8")); u = url.toURI(); } catch (final MalformedURLException e) { e.printStackTrace(); mResults.put(id, fail + "invalid url: " + urlString + " :: details: " + e.getMessage()); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } catch (final URISyntaxException e) { e.printStackTrace(); mResults.put(id, fail + "invalid uri: " + urlString + " :: details: " + e.getMessage()); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } catch (final UnsupportedEncodingException e) { e.printStackTrace(); mResults.put(id, fail + "invalid url: " + urlString + " :: details: " + e.getMessage()); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } boolean openRosaServer = false; if (uriRemap.containsKey(u)) { // we already issued a head request and got a response, // so we know the proper URL to send the submission to // and the proper scheme. We also know that it was an // OpenRosa compliant server. openRosaServer = true; u = uriRemap.get(u); } else { // we need to issue a head request final HttpHead httpHead = WebUtils.createOpenRosaHttpHead(u); // prepare response HttpResponse response = null; try { response = httpclient.execute(httpHead, localContext); final int statusCode = response.getStatusLine().getStatusCode(); if (statusCode == 401) { // we need authentication, so stop and return what // we've // done so far. mAuthRequestingServer = u; return null; } else if (statusCode == 204) { final Header[] locations = response.getHeaders("Location"); if (locations != null && locations.length == 1) { try { final URL url = new URL(URLDecoder.decode(locations[0].getValue(), "utf-8")); final URI uNew = url.toURI(); if (u.getHost().equalsIgnoreCase(uNew.getHost())) { openRosaServer = true; // trust the server to tell us a new // location // ... and possibly to use https // instead. uriRemap.put(u, uNew); u = uNew; } else { // Don't follow a redirection attempt to // a different host. // We can't tell if this is a spoof or // not. mResults.put(id, fail + "Unexpected redirection attempt to a different host: " + uNew.toString()); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } } catch (final Exception e) { e.printStackTrace(); mResults.put(id, fail + urlString + " " + e.getMessage()); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } } } else { // may be a server that does not handle try { // have to read the stream in order to reuse the // connection final InputStream is = response.getEntity().getContent(); // read to end of stream... final long count = 1024L; while (is.skip(count) == count) { ; } is.close(); } catch (final IOException e) { e.printStackTrace(); } catch (final Exception e) { e.printStackTrace(); } Log.w(t, "Status code on Head request: " + statusCode); if (statusCode >= 200 && statusCode <= 299) { mResults.put(id, fail + "Invalid status code on Head request. If you have a web proxy, you may need to login to your network. "); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } } } catch (final ClientProtocolException e) { e.printStackTrace(); Log.e(t, e.getMessage()); mResults.put(id, fail + "Client Protocol Exception"); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } catch (final ConnectTimeoutException e) { e.printStackTrace(); Log.e(t, e.getMessage()); mResults.put(id, fail + "Connection Timeout"); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } catch (final UnknownHostException e) { e.printStackTrace(); mResults.put(id, fail + e.getMessage() + " :: Network Connection Failed"); Log.e(t, e.getMessage()); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } catch (final Exception e) { e.printStackTrace(); mResults.put(id, fail + "Generic Exception"); Log.e(t, e.getMessage()); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } } // At this point, we may have updated the uri to use https. // This occurs only if the Location header keeps the host name // the same. If it specifies a different host name, we error // out. // // And we may have set authentication cookies in our // cookiestore (referenced by localContext) that will enable // authenticated publication to the server. // // get instance file final File instanceFile = new File(instance); if (!instanceFile.exists()) { mResults.put(id, fail + "instance XML file does not exist!"); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue; } // find all files in parent directory final File[] allFiles = instanceFile.getParentFile().listFiles(); // add media files final List<File> files = new ArrayList<File>(); for (final File f : allFiles) { final String fileName = f.getName(); final int dotIndex = fileName.lastIndexOf("."); String extension = ""; if (dotIndex != -1) { extension = fileName.substring(dotIndex + 1); } if (fileName.startsWith(".")) { // ignore invisible files continue; } if (fileName.equals(instanceFile.getName())) { continue; // the xml file has already been added } else if (openRosaServer) { files.add(f); } else if (extension.equals("jpg")) { // legacy 0.9x files.add(f); } else if (extension.equals("3gpp")) { // legacy 0.9x files.add(f); } else if (extension.equals("3gp")) { // legacy 0.9x files.add(f); } else if (extension.equals("mp4")) { // legacy 0.9x files.add(f); } else if (extension.equals("amr")) { // legacy 0.9x files.add(f); } else { Log.w(t, "unrecognized file type " + f.getName()); } } postResponse = ""; boolean first = true; int j = 0; while (j < files.size() || first) { first = false; final HttpPost httppost = WebUtils.createOpenRosaHttpPost(u, mAuth); final MimeTypeMap m = MimeTypeMap.getSingleton(); long byteCount = 0L; // mime post final MultipartEntity entity = new MultipartEntity(); // add the submission file first... FileBody fb = new FileBody(instanceFile, "text/xml"); entity.addPart("xml_submission_file", fb); Log.i(t, "added xml_submission_file: " + instanceFile.getName()); byteCount += instanceFile.length(); for (; j < files.size(); j++) { final File f = files.get(j); final String fileName = f.getName(); final int idx = fileName.lastIndexOf("."); String extension = ""; if (idx != -1) { extension = fileName.substring(idx + 1); } String contentType = m.getMimeTypeFromExtension(extension); // we will be processing every one of these, so // we only need to deal with the content type // determination... if (extension.equals("xml")) { fb = new FileBody(f, "text/xml"); entity.addPart(f.getName(), fb); byteCount += f.length(); Log.i(t, "added xml file " + f.getName()); } else if (extension.equals("jpg")) { fb = new FileBody(f, "image/jpeg"); entity.addPart(f.getName(), fb); byteCount += f.length(); Log.i(t, "added image file " + f.getName()); } else if (extension.equals("3gpp")) { fb = new FileBody(f, "audio/3gpp"); entity.addPart(f.getName(), fb); byteCount += f.length(); Log.i(t, "added audio file " + f.getName()); } else if (extension.equals("3gp")) { fb = new FileBody(f, "video/3gpp"); entity.addPart(f.getName(), fb); byteCount += f.length(); Log.i(t, "added video file " + f.getName()); } else if (extension.equals("mp4")) { fb = new FileBody(f, "video/mp4"); entity.addPart(f.getName(), fb); byteCount += f.length(); Log.i(t, "added video file " + f.getName()); } else if (extension.equals("csv")) { fb = new FileBody(f, "text/csv"); entity.addPart(f.getName(), fb); byteCount += f.length(); Log.i(t, "added csv file " + f.getName()); } else if (f.getName().endsWith(".amr")) { fb = new FileBody(f, "audio/amr"); entity.addPart(f.getName(), fb); Log.i(t, "added audio file " + f.getName()); } else if (extension.equals("xls")) { fb = new FileBody(f, "application/vnd.ms-excel"); entity.addPart(f.getName(), fb); byteCount += f.length(); Log.i(t, "added xls file " + f.getName()); } else if (contentType != null) { fb = new FileBody(f, contentType); entity.addPart(f.getName(), fb); byteCount += f.length(); Log.i(t, "added recognized filetype (" + contentType + ") " + f.getName()); } else { contentType = "application/octet-stream"; fb = new FileBody(f, contentType); entity.addPart(f.getName(), fb); byteCount += f.length(); Log.w(t, "added unrecognized file (" + contentType + ") " + f.getName()); } // we've added at least one attachment to the request... if (j + 1 < files.size()) { if (byteCount + files.get(j + 1).length() > 10000000L) { // the next file would exceed the 10MB // threshold... Log.i(t, "Extremely long post is being split into multiple posts"); try { final StringBody sb = new StringBody("yes", Charset.forName("UTF-8")); entity.addPart("*isIncomplete*", sb); } catch (final Exception e) { e.printStackTrace(); // never happens... } ++j; // advance over the last attachment // added... break; } } } httppost.setEntity(entity); // prepare response and return uploaded HttpResponse response = null; try { response = httpclient.execute(httppost, localContext); final int responseCode = response.getStatusLine().getStatusCode(); // try { // // have to read the stream in order to reuse the // connection // InputStream is = response.getEntity().getContent(); // // read to end of stream... // final long count = 1024L; // while (is.skip(count) == count) // ; // is.close(); // } catch (IOException e) { // e.printStackTrace(); // } catch (Exception e) { // e.printStackTrace(); // } final HttpEntity httpEntity = response.getEntity(); try { postResponse = EntityUtils.toString(httpEntity, HTTP.UTF_8).trim(); } catch (final IOException e) { e.printStackTrace(); } Log.i(t, "Response code:" + responseCode); // verify that the response was a 201 or 202. // If it wasn't, the submission has failed. if (responseCode != 201 && responseCode != 202) { if (responseCode == 200) { mResults.put(id, fail + "Network login failure? Again?"); } else { if (postResponse.length() > 0) { mResults.put(id, postResponse); } else { mResults.put(id, fail + response.getStatusLine().getReasonPhrase() + " (" + responseCode + ") at " + urlString); } } cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue next_submission; } } catch (final Exception e) { e.printStackTrace(); mResults.put(id, fail + " " + e.getMessage()); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMISSION_FAILED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); continue next_submission; } } // if it got here, it must have worked if (postResponse.length() > 0) { // Custom msg from server mResults.put(id, postResponse); } else { // There is no response from server, use default string mResults.put(id, MIntel.getInstance().getString(R.string.success)); } // mResults.put(id, // MIntel.getInstance().getString(R.string.success)); cv.put(InstanceColumns.STATUS, InstanceProviderAPI.STATUS_SUBMITTED); MIntel.getInstance().getContentResolver().update(toUpdate, cv, null, null); } if (c != null) { c.close(); } } // end while return mResults; } @Override protected void onPostExecute(final HashMap<String, String> value) { synchronized (this) { if (mStateListener != null) { if (mAuthRequestingServer != null) { mStateListener.authRequest(mAuthRequestingServer, mResults); } else { mStateListener.uploadingComplete(value); } } } } @Override protected void onProgressUpdate(final Integer... values) { synchronized (this) { if (mStateListener != null) { // update progress and total mStateListener.progressUpdate(values[0].intValue(), values[1].intValue()); } } } public void setUploaderListener(final InstanceUploaderListener sl) { synchronized (this) { mStateListener = sl; } } }