Android Open Source - geocamMemoAndroid Site Auth Cookie Implementation

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License

The source code is released under:

NASA OPEN SOURCE AGREEMENT VERSION 1.3 THIS OPEN SOURCE AGREEMENT ("AGREEMENT") DEFINES THE RIGHTS OF USE, REPRODUCTION, DISTRIBUTION, MODIFICATION AND REDISTRIBUTION OF CERTAIN COMPUTER SOFTWARE ORI...

Java Source Code

// __BEGIN_LICENSE__
// Copyright (C) 2008-2010 United States Government as represented by
// the Administrator of the National Aeronautics and Space Administration.
// All Rights Reserved.
// __END_LICENSE__
/*from w  w  w.  j a va 2s .co  m*/
package gov.nasa.arc.geocam.memo.service;

import gov.nasa.arc.geocam.memo.R;
import gov.nasa.arc.geocam.memo.exception.AuthenticationFailedException;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.params.HttpClientParams;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;

import roboguice.inject.InjectResource;
import android.util.Log;

/**
 * The Class SiteAuthCookieImplementation.
 */
public class SiteAuthCookieImplementation implements SiteAuthInterface {

  /** The server root url. */
  @InjectResource(R.string.url_server_root) String serverRootUrl;
  
  /** The app path. */
  @InjectResource(R.string.url_relative_app) String appPath;
  
  /** The http client. */
  private DefaultHttpClient httpClient;
  
  /** The session id cookie. */
  private Cookie sessionIdCookie;
  
  /** The username. */
  private String username;
  
  /** The password. */
  private String password;
  
  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.memo.service.SiteAuthInterface#setRoot(java.lang.String)
   */
  @Override
  public void setRoot(String siteRoot) {
    serverRootUrl = siteRoot;  
  }

  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.memo.service.SiteAuthInterface#setAuth(java.lang.String, java.lang.String)
   */
  @Override
  public void setAuth(String username, String password) {
    this.username = username;
    this.password = password;
  }

  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.memo.service.SiteAuthInterface#post(java.lang.String, java.util.Map)
   */
  @Override
  public int post(String relativePath, Map<String, String> params)
      throws AuthenticationFailedException, IOException,
      ClientProtocolException {
    ensureAuthenticated();

    httpClient = new DefaultHttpClient();
    HttpParams httpParams = httpClient.getParams();
    HttpClientParams.setRedirecting(httpParams, false);
    httpParams.setParameter("http.protocol.handle-redirects",false);
    
    HttpPost post = new HttpPost(this.serverRootUrl + "/" + appPath + "/" + relativePath);
    post.setParams(httpParams);
    
    if(params != null)
    {
      List<BasicNameValuePair> nameValuePairs = new ArrayList<BasicNameValuePair>();
      for(String key:params.keySet())
      {
        nameValuePairs.add(new BasicNameValuePair(key, params.get(key)));      
      }
      
      post.setEntity(new UrlEncodedFormEntity(nameValuePairs, HTTP.ASCII));
    }
    
    httpClient.getCookieStore().addCookie(sessionIdCookie);
    //post.setHeader("Cookie", sessionIdCookie.toString());

    HttpResponse r = httpClient.execute(post);
      // TODO: check for redirect to login and call login if is the case

    return r.getStatusLine().getStatusCode();
  }

  /* (non-Javadoc)
   * @see gov.nasa.arc.geocam.memo.service.SiteAuthInterface#get(java.lang.String, java.util.Map)
   */
  @Override
  public String get(String relativePath, Map<String, String> params)
      throws AuthenticationFailedException, IOException,
      ClientProtocolException {
    ensureAuthenticated();
    httpClient = new DefaultHttpClient();
    
    HttpGet get = new HttpGet(this.serverRootUrl + "/" + appPath + "/" + relativePath);
    
    // TODO: add param parsing and query string construction as necessary
    
    httpClient.getCookieStore().addCookie(sessionIdCookie);
    //get.setHeader("Cookie", sessionIdCookie.toString());

    HttpResponse r = httpClient.execute(get);
    // TODO: check for redirect to login and call login if is the case
    
    InputStream content = r.getEntity().getContent();
    
    BufferedReader br = new BufferedReader(new InputStreamReader(content));
    StringBuilder sb = new StringBuilder();

    int c = 0;
    while ((c = br.read()) != -1) {
      sb.append((char)c);
    }

    br.close();
    return sb.toString();
  }
  
  /**
   * Ensure authenticated.
   *
   * @throws AuthenticationFailedException the authentication failed exception
   * @throws ClientProtocolException the client protocol exception
   * @throws IOException Signals that an I/O exception has occurred.
   */
  private void ensureAuthenticated() throws AuthenticationFailedException, ClientProtocolException, IOException
  {
    if(username == null || password == null)
    {
      throw new AuthenticationFailedException("Username and/or password not set.");
    } 
    else
    {
      Date now = new Date();
      if(sessionIdCookie == null || sessionIdCookie.isExpired(now))
      {
        // we're not logged in (at least we think. Let's log in)
        login();        
      }
    }
  }
  
  /**
   * Login.
   *
   * @throws ClientProtocolException the client protocol exception
   * @throws IOException Signals that an I/O exception has occurred.
   * @throws AuthenticationFailedException the authentication failed exception
   */
  private void login() throws ClientProtocolException, IOException, AuthenticationFailedException
  {
    httpClient = new DefaultHttpClient();
    HttpParams params = httpClient.getParams();
    HttpClientParams.setRedirecting(params, false);

    Log.i("Talk", "Username:" + username);
    
    HttpPost p = new HttpPost(serverRootUrl + "/accounts/login/");
    p.setParams(params);
    
    List<BasicNameValuePair> nameValuePairs = new ArrayList<BasicNameValuePair>();
    nameValuePairs.add(new BasicNameValuePair("username", username));
    nameValuePairs.add(new BasicNameValuePair("password", password));
    
    p.setEntity(new UrlEncodedFormEntity(nameValuePairs, HTTP.ASCII));
    
    HttpResponse r = httpClient.execute(p);
    if(302 == r.getStatusLine().getStatusCode())
    {
      for(Cookie c:httpClient.getCookieStore().getCookies())
      {
        if(c.getName().contains("sessionid"))
        {
          sessionIdCookie = c;
          return;
        }
      }  
      throw new AuthenticationFailedException("Session cookie was missing from server login response.");
    }
    else
    {
      throw new AuthenticationFailedException("Got unexpected response code from server: " + r.getStatusLine().getStatusCode());
    }
  }
}

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