Java tutorial
/******************************************************************************* * Copyright (c) 2012 MASConsult Ltd * * 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 eu.masconsult.bgbanking.banks.fibank.ebanking; import java.io.IOException; import java.io.StringReader; import java.io.UnsupportedEncodingException; import java.util.LinkedList; import java.util.List; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.ParseException; import org.apache.http.auth.AuthenticationException; import org.apache.http.client.methods.HttpPost; import org.apache.http.conn.params.ConnManagerParams; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.params.HttpConnectionParams; import org.apache.http.params.HttpParams; import org.apache.http.util.EntityUtils; import org.w3c.dom.Document; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import android.util.Log; import com.google.gson.Gson; import eu.masconsult.bgbanking.BankingApplication; import eu.masconsult.bgbanking.banks.BankClient; import eu.masconsult.bgbanking.banks.CaptchaException; import eu.masconsult.bgbanking.banks.RawBankAccount; import eu.masconsult.bgbanking.utils.Convert; import eu.masconsult.bgbanking.utils.DumpHeadersRequestInterceptor; import eu.masconsult.bgbanking.utils.DumpHeadersResponseInterceptor; public class EFIBankClient implements BankClient { private static final String TAG = BankingApplication.TAG + "EFIB"; /** Timeout (in ms) we specify for each http request */ private static final int HTTP_REQUEST_TIMEOUT_MS = 30 * 1000; /** Domain for DSK Direct website */ private static final String DOMAIN = "e-fibank.bg"; /** Base URL for DSK Direct website */ private static final String BASE_URL = "https://" + DOMAIN; /** URL to login */ private static final String LOGIN_URL = BASE_URL + "/EBank/Login"; private static final String ENQUIRY_URL = BASE_URL + "/EBank/Enquiry"; /** * Configures the httpClient to connect to the URL provided. */ private static DefaultHttpClient getHttpClient() { DefaultHttpClient httpClient = new DefaultHttpClient(); final HttpParams params = httpClient.getParams(); HttpConnectionParams.setConnectionTimeout(params, HTTP_REQUEST_TIMEOUT_MS); HttpConnectionParams.setSoTimeout(params, HTTP_REQUEST_TIMEOUT_MS); ConnManagerParams.setTimeout(params, HTTP_REQUEST_TIMEOUT_MS); httpClient.addRequestInterceptor(new DumpHeadersRequestInterceptor()); httpClient.addResponseInterceptor(new DumpHeadersResponseInterceptor()); return httpClient; } @Override public String authenticate(String username, String password) throws IOException, ParseException, CaptchaException, AuthenticationException { AuthToken authToken = new AuthToken(); authToken.username = username; authToken.password = password; obtainSession(getHttpClient(), authToken); return authToken.toJson(); } private void obtainSession(DefaultHttpClient httpClient, AuthToken authToken) throws IOException, AuthenticationException { HttpEntity entity; try { entity = new StringEntity("<?xml version=\"1.0\"?><LOGIN><USER_NAME>" + authToken.username + "</USER_NAME><USER_PASS>" + authToken.password + "</USER_PASS><USER_LANG>BG</USER_LANG><PATH>Login</PATH></LOGIN>", "utf-8"); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } HttpPost post = new HttpPost(LOGIN_URL); post.addHeader("Content-Type", "text/xml"); post.setHeader("Accept", "*/*"); post.setEntity(entity); HttpResponse resp = httpClient.execute(post); if (resp.getStatusLine().getStatusCode() != HttpStatus.SC_OK) { throw new AuthenticationException("Invalid credentials!"); } String response = EntityUtils.toString(resp.getEntity()); Log.v(TAG, "response = " + response); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db; try { db = dbf.newDocumentBuilder(); } catch (ParserConfigurationException e) { throw new ParseException(e.getMessage()); } InputSource is = new InputSource(); is.setCharacterStream(new StringReader(response)); Document doc; try { doc = db.parse(is); } catch (SAXException e) { throw new ParseException(e.getMessage()); } NodeList session = doc.getElementsByTagName("SESSION"); if (session == null || session.getLength() != 1) { throw new ParseException("can't find SESSION "); } NamedNodeMap attributes = session.item(0).getAttributes(); authToken.sessionId = attributes.getNamedItem("id").getTextContent(); } @Override public List<RawBankAccount> getBankAccounts(String authtoken) throws IOException, ParseException, AuthenticationException { AuthToken authToken = AuthToken.fromJson(authtoken); DefaultHttpClient httpClient = getHttpClient(); obtainSession(httpClient, authToken); HttpEntity entity; try { entity = new StringEntity( "<?xml version=\"1.0\"?><?xml-stylesheet type=\"text/xsl\" href=\"xslt/enquiries/expositions.xslt\"?><ENQUIRY sessid=\"" + authToken.sessionId + "\" lang=\"BG\" funcid=\"14\"><EXPOSITIONS/></ENQUIRY>", "utf-8"); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } HttpPost post = new HttpPost(ENQUIRY_URL); post.addHeader("Content-Type", "text/xml"); post.setHeader("Accept", "*/*"); post.setEntity(entity); HttpResponse resp = httpClient.execute(post); if (resp.getStatusLine().getStatusCode() != HttpStatus.SC_OK) { throw new AuthenticationException("Invalid credentials!"); } String response = EntityUtils.toString(resp.getEntity()); Log.v(TAG, "response = " + response); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db; try { db = dbf.newDocumentBuilder(); } catch (ParserConfigurationException e) { throw new ParseException(e.getMessage()); } InputSource is = new InputSource(); is.setCharacterStream(new StringReader(response)); Document doc; try { doc = db.parse(is); } catch (SAXException e) { throw new ParseException(e.getMessage()); } NodeList expositions = doc.getElementsByTagName("EXPOSITION"); List<RawBankAccount> bankAccounts = new LinkedList<RawBankAccount>(); for (int i = 0; i < expositions.getLength(); i++) { Node exposition = expositions.item(i); RawBankAccount bankAccount = obtainBankAccountFromExposition(exposition); if (bankAccount != null) { bankAccounts.add(bankAccount); } } return bankAccounts; } private RawBankAccount obtainBankAccountFromExposition(Node exposition) { NamedNodeMap attributes = exposition.getAttributes(); return new RawBankAccount().setServerId(attributes.getNamedItem("accountid").getTextContent()) .setIBAN(attributes.getNamedItem("iban").getTextContent()) .setCurrency(attributes.getNamedItem("curr").getTextContent()) .setName(attributes.getNamedItem("alias").getTextContent()) .setLastTransaction(attributes.getNamedItem("lastmovement").getTextContent()) .setBalance(Convert.strToFloat(attributes.getNamedItem("balance").getTextContent())) .setAvailableBalance(Convert.strToFloat(attributes.getNamedItem("available").getTextContent())); } private static class AuthToken { String username; String password; String sessionId; public static AuthToken fromJson(String json) { return new Gson().fromJson(json, AuthToken.class); } public String toJson() { return new Gson().toJson(this); } } }