CookieStore for dealing with persistent cookies in Android

## ANdroid Persitent Cookie Store
//HOW TO USE
SiCookieStore2 siCookieStore = new SiCookieStore2(context);
CookieManager cookieManager = new CookieManager((CookieStore) siCookieStore, CookiePolicy.ACCEPT_ALL);
CookieHandler.setDefault(cookieManager);

## SICookie2
/**
 * Taken from https://github.com/loopj/android-async-http
 */
package com.orb.net;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.net.HttpCookie;

/**
 * A simple wrapper for {@link HttpCookie} to work with {@link SiCookieStore2}
 * Gives power of serialization-deserialization to {@link HttpCookie}
 * @author Manish
 *
 */
public class SICookie2 implements Serializable {

	private HttpCookie mHttpCookie;
	/**
	 *
	 */
	private static final long serialVersionUID = 2532101328282342578L;

	/**
	 *
	 */
	public SICookie2(HttpCookie cookie) {
		this.mHttpCookie = cookie;
	}

	public HttpCookie getCookie() {
		return mHttpCookie;
	}

	private void writeObject(ObjectOutputStream out) throws IOException {
		out.writeObject(mHttpCookie.getName());
		out.writeObject(mHttpCookie.getValue());
		out.writeObject(mHttpCookie.getComment());
		out.writeObject(mHttpCookie.getCommentURL());
		out.writeBoolean(mHttpCookie.getDiscard());
		out.writeObject(mHttpCookie.getDomain());
		out.writeLong(mHttpCookie.getMaxAge());
		out.writeObject(mHttpCookie.getPath());
		out.writeObject(mHttpCookie.getPortlist());
		out.writeBoolean(mHttpCookie.getSecure());
		out.writeInt(mHttpCookie.getVersion());
	}

	private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
		String name = (String) in.readObject();
		String value = (String) in.readObject();
		mHttpCookie = new HttpCookie(name, value);
		mHttpCookie.setComment((String) in.readObject());
		mHttpCookie.setCommentURL((String) in.readObject());
		mHttpCookie.setDiscard(in.readBoolean());
		mHttpCookie.setDomain((String) in.readObject());
		mHttpCookie.setMaxAge(in.readLong());
		mHttpCookie.setPath((String) in.readObject());
		mHttpCookie.setPortlist((String) in.readObject());
		mHttpCookie.setSecure(in.readBoolean());
		mHttpCookie.setVersion(in.readInt());
	}

}

## SiCookieStore2
/**
 * Inspired from https://github.com/loopj/android-async-http
 */
package com.orb.net;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.CookieStore;
import java.net.HttpCookie;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.SharedPreferences;
import android.text.TextUtils;

import com.orb.common.Log;

/**
 * Implementation of {@link CookieStore} for persistence cookies, uses shared
 * preference for storing cookies.
 *
 * @author Manish
 *
 */
public class SiCookieStore2 implements CookieStore {
	private static final String LOG_TAG = "SICookieStore2";
	private static final String COOKIE_PREFS = "com.orb.net.cookieprefs";
	private static final String COOKIE_DOMAINS_STORE = "com.orb.net.CookieStore.domain";
	private static final String COOKIE_DOMAIN_PREFIX = "com.orb.net.CookieStore.domain_";
	private static final String COOKIE_NAME_PREFIX = "com.orb.net.CookieStore.cookie_";

	/*This map here will store all domain to cookies bindings*/
	private final CookieMap map;

	private final SharedPreferences cookiePrefs;

	/**
	 * Construct a persistent cookie store.
	 *
	 * @param context
	 *            Context to attach cookie store to
	 */
	public SiCookieStore2(Context context) {
		cookiePrefs = context.getSharedPreferences(COOKIE_PREFS, 0);
		map = new CookieMap();

		// Load any previously stored domains into the store
		String storedCookieDomains = cookiePrefs.getString(COOKIE_DOMAINS_STORE, null);
		if (storedCookieDomains != null) {
			String[] storedCookieDomainsArray = TextUtils.split(storedCookieDomains, ",");
			//split this domains and get cookie names stored for each domain
			for (String domain : storedCookieDomainsArray) {
				String storedCookiesNames = cookiePrefs.getString(COOKIE_DOMAIN_PREFIX + domain,
						null);
				//so now we have these cookie names
				if (storedCookiesNames != null) {
					//split these cookie names and get serialized cookie stored
					String[] storedCookieNamesArray = TextUtils.split(storedCookiesNames, ",");
					if (storedCookieNamesArray != null) {
						//in this list we store all cookies under one URI
						List<HttpCookie> cookies = new ArrayList<HttpCookie>();
						for (String cookieName : storedCookieNamesArray) {
							String encCookie = cookiePrefs.getString(COOKIE_NAME_PREFIX + domain
									+ cookieName, null);
							//now we deserialize or unserialize (whatever you call it) this cookie
							//and get HttpCookie out of it and pass it to List
							if (encCookie != null)
								cookies.add(decodeCookie(encCookie));
						}
						map.put(URI.create(domain), cookies);
					}
				}
			}
		}
	}

	public synchronized void add(URI uri, HttpCookie cookie) {
		if (cookie == null) {
			throw new NullPointerException("cookie == null");
		}

		uri = cookiesUri(uri);
		List<HttpCookie> cookies = map.get(uri);
		if (cookies == null) {
			cookies = new ArrayList<HttpCookie>();
			map.put(uri, cookies);
		} else {
			cookies.remove(cookie);
		}
		cookies.add(cookie);

		// Save cookie into persistent store
		SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
		prefsWriter.putString(COOKIE_DOMAINS_STORE, TextUtils.join(",", map.keySet()));

		Set<String> names = new HashSet<String>();
		for (HttpCookie cookie2 : cookies) {
			names.add(cookie2.getName());
			prefsWriter.putString(COOKIE_NAME_PREFIX + uri + cookie2.getName(),
					encodeCookie(new SICookie2(cookie2)));
		}
		prefsWriter.putString(COOKIE_DOMAIN_PREFIX + uri, TextUtils.join(",", names));

		prefsWriter.commit();
	}

	public synchronized List<HttpCookie> get(URI uri) {
		if (uri == null) {
			throw new NullPointerException("uri == null");
		}

		List<HttpCookie> result = new ArrayList<HttpCookie>();
		// get cookies associated with given URI. If none, returns an empty list
		List<HttpCookie> cookiesForUri = map.get(uri);
		if (cookiesForUri != null) {
			for (Iterator<HttpCookie> i = cookiesForUri.iterator(); i.hasNext();) {
				HttpCookie cookie = i.next();
				if (cookie.hasExpired()) {
					i.remove(); // remove expired cookies
				} else {
					result.add(cookie);
				}
			}
		}
		// get all cookies that domain matches the URI
		for (Map.Entry<URI, List<HttpCookie>> entry : map.entrySet()) {
			if (uri.equals(entry.getKey())) {
				continue; // skip the given URI; we've already handled it
			}
			List<HttpCookie> entryCookies = entry.getValue();
			for (Iterator<HttpCookie> i = entryCookies.iterator(); i.hasNext();) {
				HttpCookie cookie = i.next();
				if (!HttpCookie.domainMatches(cookie.getDomain(), uri.getHost())) {
					continue;
				}
				if (cookie.hasExpired()) {
					i.remove(); // remove expired cookies
				} else if (!result.contains(cookie)) {
					result.add(cookie);
				}
			}
		}
		return Collections.unmodifiableList(result);
	}

	public synchronized List<HttpCookie> getCookies() {
		List<HttpCookie> result = new ArrayList<HttpCookie>();
		for (List<HttpCookie> list : map.values()) {
			for (Iterator<HttpCookie> i = list.iterator(); i.hasNext();) {
				HttpCookie cookie = i.next();
				if (cookie.hasExpired()) {
					i.remove(); // remove expired cookies
				} else if (!result.contains(cookie)) {
					result.add(cookie);
				}
			}
		}
		return Collections.unmodifiableList(result);
	}

	public synchronized List<URI> getURIs() {
		List<URI> result = new ArrayList<URI>(map.getAllURIs());
		result.remove(null); // sigh
		return Collections.unmodifiableList(result);
	}


	public synchronized boolean remove(URI uri, HttpCookie cookie) {
		if (cookie == null) {
			throw new NullPointerException("cookie == null");
		}

		if (map.removeCookie(uri, cookie)) {
			SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
			prefsWriter.putString(COOKIE_DOMAIN_PREFIX + uri,
					TextUtils.join(",", map.getAllCookieNames(uri)));
			prefsWriter.remove(COOKIE_NAME_PREFIX + uri + cookie.getName());
			prefsWriter.apply();
			return true;
		}
		return false;
	}

	public synchronized boolean removeAll() {
		// Clear cookies from persistent store
		SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
		prefsWriter.clear();
		prefsWriter.commit();

		// Clear cookies from local store
		boolean result = !map.isEmpty();
		map.clear();
		return result;
	}

	/**
	 * Serializes HttpCookie object into String
	 *
	 * @param cookie
	 *            cookie to be encoded, can be null
	 * @return cookie encoded as String
	 */
	protected String encodeCookie(SICookie2 cookie) {
		if (cookie == null)
			return null;

		ByteArrayOutputStream os = new ByteArrayOutputStream();
		try {
			ObjectOutputStream outputStream = new ObjectOutputStream(os);
			outputStream.writeObject(cookie);
		} catch (IOException e) {
			Log.e(LOG_TAG, "IOException in encodeCookie", e);
			return null;
		}

		return byteArrayToHexString(os.toByteArray());
	}

	/**
	 * Returns HttpCookie decoded from cookie string
	 *
	 * @param cookieString
	 *            string of cookie as returned from http request
	 * @return decoded cookie or null if exception occured
	 */
	protected HttpCookie decodeCookie(String cookieString) {
		byte[] bytes = hexStringToByteArray(cookieString);
		ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);

		HttpCookie cookie = null;
		try {
			ObjectInputStream objectInputStream = new ObjectInputStream(byteArrayInputStream);
			cookie = ((SICookie2) objectInputStream.readObject()).getCookie();
		} catch (IOException e) {
			Log.e(LOG_TAG, "IOException in decodeCookie", e);
		} catch (ClassNotFoundException e) {
			Log.e(LOG_TAG, "ClassNotFoundException in decodeCookie", e);
		}

		return cookie;
	}

	/**
	 * Using some super basic byte array &lt;-&gt; hex conversions so we don't
	 * have to rely on any large Base64 libraries. Can be overridden if you
	 * like!
	 *
	 * @param bytes
	 *            byte array to be converted
	 * @return string containing hex values
	 */
	protected String byteArrayToHexString(byte[] bytes) {
		StringBuilder sb = new StringBuilder(bytes.length * 2);
		for (byte element : bytes) {
			int v = element & 0xff;
			if (v < 16) {
				sb.append('0');
			}
			sb.append(Integer.toHexString(v));
		}
		return sb.toString().toUpperCase(Locale.US);
	}

	/**
	 * Converts hex values from strings to byte arra
	 *
	 * @param hexString
	 *            string of hex-encoded values
	 * @return decoded byte array
	 */
	protected byte[] hexStringToByteArray(String hexString) {
		int len = hexString.length();
		byte[] data = new byte[len / 2];
		for (int i = 0; i < len; i += 2) {
			data[i / 2] = (byte) ((Character.digit(hexString.charAt(i), 16) << 4) + Character
					.digit(hexString.charAt(i + 1), 16));
		}
		return data;
	}
	/**
	 * Utility function to male sure that every time you get consistent URI
	 * @param uri
	 * @return
	 */
	private URI cookiesUri(URI uri) {
		if (uri == null) {
			return null;
		}
		try {
			return new URI(uri.getScheme(), uri.getHost(), null, null);
		} catch (URISyntaxException e) {
			return uri;
		}
	}
	/**
	 * A implementation of {@link Map} for utility class for storing URL cookie map
	 * @author Manish
	 *
	 */
	private class CookieMap implements Map<URI, List<HttpCookie>> {

		private final Map<URI, List<HttpCookie>> map;

		/**
		 *
		 */
		public CookieMap() {
			map = new HashMap<URI, List<HttpCookie>>();
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#clear()
		 */
		@Override
		public void clear() {
			map.clear();
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#containsKey(java.lang.Object)
		 */
		@Override
		public boolean containsKey(Object key) {

			return map.containsKey(key);
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#containsValue(java.lang.Object)
		 */
		@Override
		public boolean containsValue(Object value) {

			return map.containsValue(value);
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#entrySet()
		 */
		@Override
		public Set<java.util.Map.Entry<URI, List<HttpCookie>>> entrySet() {

			return map.entrySet();
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#get(java.lang.Object)
		 */
		@Override
		public List<HttpCookie> get(Object key) {

			return map.get(key);
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#isEmpty()
		 */
		@Override
		public boolean isEmpty() {

			return map.isEmpty();
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#keySet()
		 */
		@Override
		public Set<URI> keySet() {

			return map.keySet();
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#put(java.lang.Object, java.lang.Object)
		 */
		@Override
		public List<HttpCookie> put(URI key, List<HttpCookie> value) {

			return map.put(key, value);
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#putAll(java.util.Map)
		 */
		@Override
		public void putAll(Map<? extends URI, ? extends List<HttpCookie>> map) {
			this.map.putAll(map);
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#remove(java.lang.Object)
		 */
		@Override
		public List<HttpCookie> remove(Object key) {

			return map.remove(key);
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#size()
		 */
		@Override
		public int size() {

			return map.size();
		}

		/*
		 * (non-Javadoc)
		 *
		 * @see java.util.Map#values()
		 */
		@Override
		public Collection<List<HttpCookie>> values() {

			return map.values();
		}
		/**
		 * List all URIs for which cookies are stored in map
		 * @return
		 */
		public Collection<URI> getAllURIs() {
			return map.keySet();
		}
		/**
		 * Get all cookies names stored for given URI
		 * @param uri
		 * @return
		 */
		public Collection<String> getAllCookieNames(URI uri) {
			List<HttpCookie> cookies = map.get(uri);
			Set<String> cookieNames = new HashSet<String>();
			for (HttpCookie cookie : cookies) {
				cookieNames.add(cookie.getName());
			}
			return cookieNames;
		}
		/**
		 * Removes requested {@link HttpCookie} {@code httpCookie} from given {@code uri} value
		 * @param uri
		 * @param httpCookie
		 * @return
		 */
		public boolean removeCookie(URI uri, HttpCookie httpCookie) {
			if (map.containsKey(uri)) {
				return map.get(uri).remove(httpCookie);
			} else {
				return false;
			}

		}

	}
}