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package de.demo.login; import java.io.IOException; import java.io.InputStream; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.ArrayList; import java.util.List; import javax.xml.parsers.ParserConfigurationException; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.params.HttpConnectionParams; import org.apache.http.protocol.HTTP; import org.xml.sax.Attributes; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.XMLReader; import org.xml.sax.helpers.DefaultHandler; import android.app.Activity; import android.app.AlertDialog; import android.app.ProgressDialog; import android.content.Intent; import android.os.Bundle; import android.os.Looper; import android.view.View; import android.widget.Button; import android.widget.EditText; import de.demo.main.R; public class Login extends Activity { private static final String UPDATE_URL = "http://paddesite.pa.ohost.de/login.php"; public ProgressDialog progressDialog; private EditText UserEditText; private EditText PassEditText; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); progressDialog = new ProgressDialog(this); progressDialog.setMessage("Please wait..."); progressDialog.setIndeterminate(true); progressDialog.setCancelable(false); UserEditText = (EditText) findViewById(R.id.username); PassEditText = (EditText) findViewById(R.id.password); Button button = (Button) findViewById(R.id.okbutton); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { int usersize = UserEditText.getText().length(); int passsize = PassEditText.getText().length(); if(usersize > 0 && passsize > 0) { progressDialog.show(); String user = UserEditText.getText().toString(); String pass = PassEditText.getText().toString(); doLogin(user, pass); } else createDialog("Error","Please enter Username and Password"); } }); button = (Button) findViewById(R.id.cancelbutton); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { quit(false, null); } }); } private void quit(boolean success, Intent i) { setResult( (success) ? -1:0, i); finish(); } private void createDialog(String title, String text) { AlertDialog ad = new AlertDialog.Builder(this) .setPositiveButton("Ok", null) .setTitle(title) .setMessage(text) .create(); ad.show(); } private void doLogin(final String login, final String pass) { final String pw = md5(pass); Thread t = new Thread() { public void run() { Looper.prepare(); DefaultHttpClient client = new DefaultHttpClient(); HttpConnectionParams.setConnectionTimeout(client.getParams(), 15000); HttpResponse response; HttpEntity entity; try { HttpPost post = new HttpPost(UPDATE_URL); List nvps = new ArrayList (); nvps.add(new BasicNameValuePair("username", login)); nvps.add(new BasicNameValuePair("password", pw)); post.setHeader("Content-Type", "application/x-www-form-urlencoded"); post.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8)); response = client.execute(post); entity = response.getEntity(); InputStream is = entity.getContent(); read(is); is.close(); if (entity != null) entity.consumeContent(); } catch (Exception e) { progressDialog.dismiss(); createDialog("Error", "Couldn't establish a connection"); } Looper.loop(); } }; t.start(); } private void read(InputStream in) { SAXParserFactory spf = SAXParserFactory.newInstance(); SAXParser sp; try { sp = spf.newSAXParser(); XMLReader xr = sp.getXMLReader(); LoginContentHandler uch = new LoginContentHandler(); xr.setContentHandler(uch); xr.parse(new InputSource(in)); } catch (ParserConfigurationException e) { } catch (SAXException e) { } catch (IOException e) {} } private String md5(String in) { MessageDigest digest; try { digest = MessageDigest.getInstance("MD5"); digest.reset(); digest.update(in.getBytes()); byte[] a = digest.digest(); int len = a.length; StringBuilder sb = new StringBuilder(len << 1); for (int i = 0; i < len; i++) { sb.append(Character.forDigit((a[i] & 0xf0) >> 4, 16)); sb.append(Character.forDigit(a[i] & 0x0f, 16)); } return sb.toString(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } return null; } private class LoginContentHandler extends DefaultHandler { private boolean in_loginTag = false; private int userID; private boolean error_occured = false; public void startElement(String n, String l, String q, Attributes a) throws SAXException { if(l == "login") in_loginTag = true; if(l == "error") { progressDialog.dismiss(); if(Integer.parseInt(a.getValue("value")) == 1) createDialog("Error", "Couldn't connect to Database"); if(Integer.parseInt(a.getValue("value")) == 2) createDialog("Error", "Error in Database: Table missing"); if(Integer.parseInt(a.getValue("value")) == 3) createDialog("Error", "Invalid username and/or password"); error_occured = true; } if(l == "user" && in_loginTag && a.getValue("id") != "") userID = Integer.parseInt(a.getValue("id")); } public void endElement(String n, String l, String q) throws SAXException { if(l == "login") { in_loginTag = false; if(!error_occured) { progressDialog.dismiss(); Intent i = new Intent(); i.putExtra("userid", userID); quit(true,i); } } } public void characters(char ch[], int start, int length) { } public void startDocument() throws SAXException { } public void endDocument() throws SAXException { } } }