/*
* Copyright (c) 2015 Fran Montiel
*
* 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 org.tomahawk.libtomahawk.utils;
import android.content.Context;
import android.content.SharedPreferences;
import android.util.Log;
import java.net.CookieStore;
import java.net.HttpCookie;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class PersistentCookieStore implements CookieStore {
private static final String TAG = PersistentCookieStore.class
.getSimpleName();
// Persistence
private static final String SP_COOKIE_STORE_SUFFIX = "_cookieStore";
private static final String SP_KEY_DELIMITER = "♠"; // Unusual char in URL
private SharedPreferences sharedPreferences;
// In memory
private Map<URI, Set<HttpCookie>> allCookies;
public PersistentCookieStore(Context context, String cookieContextId) {
sharedPreferences = context.getSharedPreferences(cookieContextId + SP_COOKIE_STORE_SUFFIX,
Context.MODE_PRIVATE);
loadAllFromPersistence();
}
private void loadAllFromPersistence() {
allCookies = new HashMap<>();
Map<String, ?> allPairs = sharedPreferences.getAll();
for (Map.Entry<String, ?> entry : allPairs.entrySet()) {
String[] uriAndName = entry.getKey().split(SP_KEY_DELIMITER, 2);
try {
URI uri = new URI(uriAndName[0]);
String encodedCookie = (String) entry.getValue();
HttpCookie cookie = new SerializableHttpCookie().decode(encodedCookie);
if (cookie != null) {
Set<HttpCookie> targetCookies = allCookies.get(uri);
if (targetCookies == null) {
targetCookies = new HashSet<>();
allCookies.put(uri, targetCookies);
}
// Repeated cookies cannot exist in persistence
// targetCookies.remove(cookie)
targetCookies.add(cookie);
}
} catch (URISyntaxException e) {
Log.w(TAG, e);
}
}
}
@Override
public synchronized void add(URI uri, HttpCookie cookie) {
uri = cookieUri(uri, cookie);
Set<HttpCookie> targetCookies = allCookies.get(uri);
if (targetCookies == null) {
targetCookies = new HashSet<>();
allCookies.put(uri, targetCookies);
}
targetCookies.remove(cookie);
targetCookies.add(cookie);
saveToPersistence(uri, cookie);
}
/**
* Get the real URI from the cookie "domain" and "path" attributes, if they are not set then
* uses the URI provided (coming from the response)
*/
private static URI cookieUri(URI uri, HttpCookie cookie) {
URI cookieUri = uri;
if (cookie.getDomain() != null) {
// Remove the starting dot character of the domain, if exists (e.g: .domain.com -> domain.com)
String domain = cookie.getDomain();
if (domain.charAt(0) == '.') {
domain = domain.substring(1);
}
try {
cookieUri = new URI(uri.getScheme() == null ? "http" : uri.getScheme(), domain,
cookie.getPath() == null ? "/" : cookie.getPath(), null);
} catch (URISyntaxException e) {
Log.w(TAG, e);
}
}
return cookieUri;
}
private void saveToPersistence(URI uri, HttpCookie cookie) {
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(uri.toString() + SP_KEY_DELIMITER + cookie.getName(),
new SerializableHttpCookie().encode(cookie));
editor.apply();
}
@Override
public synchronized List<HttpCookie> get(URI uri) {
return getValidCookies(uri);
}
@Override
public synchronized List<HttpCookie> getCookies() {
List<HttpCookie> allValidCookies = new ArrayList<>();
for (URI storedUri : allCookies.keySet()) {
allValidCookies.addAll(getValidCookies(storedUri));
}
return allValidCookies;
}
private List<HttpCookie> getValidCookies(URI uri) {
List<HttpCookie> targetCookies = new ArrayList<>();
// If the stored URI does not have a path then it must match any URI in
// the same domain
for (URI storedUri : allCookies.keySet()) {
// Check ith the domains match according to RFC 6265
if (checkDomainsMatch(storedUri.getHost(), uri.getHost())) {
// Check if the paths match according to RFC 6265
if (checkPathsMatch(storedUri.getPath(), uri.getPath())) {
targetCookies.addAll(allCookies.get(storedUri));
}
}
}
// Check it there are expired cookies and remove them
if (!targetCookies.isEmpty()) {
List<HttpCookie> cookiesToRemoveFromPersistence = new ArrayList<>();
for (Iterator<HttpCookie> it = targetCookies.iterator(); it.hasNext(); ) {
HttpCookie currentCookie = it.next();
if (currentCookie.hasExpired()) {
cookiesToRemoveFromPersistence.add(currentCookie);
it.remove();
}
}
if (!cookiesToRemoveFromPersistence.isEmpty()) {
removeFromPersistence(uri, cookiesToRemoveFromPersistence);
}
}
return targetCookies;
}
/* http://tools.ietf.org/html/rfc6265#section-5.1.3
A string domain-matches a given domain string if at least one of the
following conditions hold:
o The domain string and the string are identical. (Note that both
the domain string and the string will have been canonicalized to
lower case at this point.)
o All of the following conditions hold:
* The domain string is a suffix of the string.
* The last character of the string that is not included in the
domain string is a %x2E (".") character.
* The string is a host name (i.e., not an IP address). */
private boolean checkDomainsMatch(String cookieHost, String requestHost) {
return requestHost.equals(cookieHost) || requestHost.endsWith("." + cookieHost);
}
/* http://tools.ietf.org/html/rfc6265#section-5.1.4
A request-path path-matches a given cookie-path if at least one of
the following conditions holds:
o The cookie-path and the request-path are identical.
o The cookie-path is a prefix of the request-path, and the last
character of the cookie-path is %x2F ("/").
o The cookie-path is a prefix of the request-path, and the first
character of the request-path that is not included in the cookie-
path is a %x2F ("/") character. */
private boolean checkPathsMatch(String cookiePath, String requestPath) {
return requestPath.equals(cookiePath) ||
(requestPath.startsWith(cookiePath)
&& cookiePath.charAt(cookiePath.length() - 1) == '/') ||
(requestPath.startsWith(cookiePath)
&& requestPath.substring(cookiePath.length()).charAt(0) == '/');
}
private void removeFromPersistence(URI uri, List<HttpCookie> cookiesToRemove) {
SharedPreferences.Editor editor = sharedPreferences.edit();
for (HttpCookie cookieToRemove : cookiesToRemove) {
editor.remove(uri.toString() + SP_KEY_DELIMITER + cookieToRemove.getName());
}
editor.apply();
}
@Override
public synchronized List<URI> getURIs() {
return new ArrayList<>(allCookies.keySet());
}
@Override
public synchronized boolean remove(URI uri, HttpCookie cookie) {
Set<HttpCookie> targetCookies = allCookies.get(uri);
boolean cookieRemoved = targetCookies != null && targetCookies.remove(cookie);
if (cookieRemoved) {
removeFromPersistence(uri, cookie);
}
return cookieRemoved;
}
private void removeFromPersistence(URI uri, HttpCookie cookieToRemove) {
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.remove(uri.toString() + SP_KEY_DELIMITER + cookieToRemove.getName());
editor.apply();
}
@Override
public synchronized boolean removeAll() {
allCookies.clear();
removeAllFromPersistence();
return true;
}
private void removeAllFromPersistence() {
sharedPreferences.edit().clear().apply();
}
}