content: package com.lib.http.cookie.store;
  
  import android.content.Context;
  import android.content.SharedPreferences;
  import android.text.TextUtils;
  import android.util.Log;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  
  import okhttp3.Cookie;
  import okhttp3.HttpUrl;
  
  /**
   * ================================================
   * 作    者：廖子尧
   * 版    本：1.0
   * 创建日期：2016/1/14
   * 描    述：使用 SharedPreferences 持久化存储 cookie
   * 修订历史：
   * ================================================
   */
  public class PersistentCookieStore implements CookieStore {
  
      private static final String LOG_TAG = "PersistentCookieStore";
      private static final String COOKIE_PREFS = "okgo_cookie";        //cookie使用prefs保存
      private static final String COOKIE_NAME_PREFIX = "cookie_";          //cookie持久化的统一前缀
  
      private final HashMap<String, ConcurrentHashMap<String, Cookie>> cookies;
      private final SharedPreferences cookiePrefs;
  
      public PersistentCookieStore(Context application) {
          cookiePrefs = application.getSharedPreferences(COOKIE_PREFS, Context.MODE_PRIVATE);
          cookies = new HashMap<>();
  
          //将持久化的cookies缓存到内存中,数据结构为 Map<Url.host, Map<Cookie.name, Cookie>>
          Map<String, ?> prefsMap = cookiePrefs.getAll();
          for (Map.Entry<String, ?> entry : prefsMap.entrySet()) {
              if ((entry.getValue()) != null && !entry.getKey().startsWith(COOKIE_NAME_PREFIX)) {
                  //获取url对应的所有cookie的key,用","分割
                  String[] cookieNames = TextUtils.split((String) entry.getValue(), ",");
                  for (String name : cookieNames) {
                      //根据对应cookie的Key,从xml中获取cookie的真实值
                      String encodedCookie = cookiePrefs.getString(COOKIE_NAME_PREFIX + name, null);
                      if (encodedCookie != null) {
                          Cookie decodedCookie = decodeCookie(encodedCookie);
                          if (decodedCookie != null) {
                              if (!cookies.containsKey(entry.getKey()))
                                  cookies.put(entry.getKey(), new ConcurrentHashMap<String, Cookie>());
                              cookies.get(entry.getKey()).put(name, decodedCookie);
                          }
                      }
                  }
              }
          }
      }
  
      private String getCookieToken(Cookie cookie) {
          return cookie.name() + "@" + cookie.domain();
      }
  
      /** 当前cookie是否过期 */
      private static boolean isCookieExpired(Cookie cookie) {
          return cookie.expiresAt() < System.currentTimeMillis();
      }
  
      /** 根据当前url获取所有需要的cookie,只返回没有过期的cookie */
      @Override
      public List<Cookie> loadCookies(HttpUrl url) {
          ArrayList<Cookie> ret = new ArrayList<>();
          if (cookies.containsKey(url.host())) {
              Collection<Cookie> urlCookies = cookies.get(url.host()).values();
              for (Cookie cookie : urlCookies) {
                  if (isCookieExpired(cookie)) {
                      removeCookie(url, cookie);
                  } else {
                      ret.add(cookie);
                  }
              }
          }
          return ret;
      }
  
      /** 将url的所有Cookie保存在本地 */
      @Override
      public void saveCookies(HttpUrl url, List<Cookie> urlCookies) {
          if (!cookies.containsKey(url.host())) {
              cookies.put(url.host(), new ConcurrentHashMap<String, Cookie>());
          }
          for (Cookie cookie : urlCookies) {
              //当前cookie是否过期
              if (isCookieExpired(cookie)) {
                  removeCookie(url, cookie);
              } else {
                  saveCookie(url, cookie, getCookieToken(cookie));
              }
          }
      }
  
      /**
       * 保存cookie，并将cookies持久化到本地,数据结构为
       * Url.host -> Cookie1.name,Cookie2.name,Cookie3.name
       * cookie_Cookie1.name -> CookieString
       * cookie_Cookie2.name -> CookieString
       */
      private void saveCookie(HttpUrl url, Cookie cookie, String name) {
          //内存缓存
          cookies.get(url.host()).put(name, cookie);
          //文件缓存
          SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
          prefsWriter.putString(url.host(), TextUtils.join(",", cookies.get(url.host()).keySet()));
          prefsWriter.putString(COOKIE_NAME_PREFIX + name, encodeCookie(new SerializableHttpCookie(cookie)));
          prefsWriter.commit();
      }
  
      /** 根据url移除当前的cookie */
      @Override
      public boolean removeCookie(HttpUrl url, Cookie cookie) {
          String name = getCookieToken(cookie);
          if (cookies.containsKey(url.host()) && cookies.get(url.host()).containsKey(name)) {
              //内存移除
              cookies.get(url.host()).remove(name);
              //文件移除
              SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
              if (cookiePrefs.contains(COOKIE_NAME_PREFIX + name)) {
                  prefsWriter.remove(COOKIE_NAME_PREFIX + name);
              }
              prefsWriter.putString(url.host(), TextUtils.join(",", cookies.get(url.host()).keySet()));
              prefsWriter.commit();
              return true;
          } else {
              return false;
          }
      }
  
      @Override
      public boolean removeCookies(HttpUrl url) {
          if (cookies.containsKey(url.host())) {
              //文件移除
              Set<String> cookieNames = cookies.get(url.host()).keySet();
              SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
              for (String cookieName : cookieNames) {
                  if (cookiePrefs.contains(COOKIE_NAME_PREFIX + cookieName)) {
                      prefsWriter.remove(COOKIE_NAME_PREFIX + cookieName);
                  }
              }
              prefsWriter.remove(url.host());
              prefsWriter.commit();
              //内存移除
              cookies.remove(url.host());
              return true;
          } else {
              return false;
          }
      }
  
      @Override
      public boolean removeAllCookie() {
          SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
          prefsWriter.clear();
          prefsWriter.commit();
          cookies.clear();
          return true;
      }
  
      /** 获取所有的cookie */
      @Override
      public List<Cookie> getAllCookie() {
          ArrayList<Cookie> ret = new ArrayList<>();
          for (String key : cookies.keySet())
              ret.addAll(cookies.get(key).values());
          return ret;
      }
  
      /**
       * cookies 序列化成 string
       *
       * @param cookie 要序列化的cookie
       * @return 序列化之后的string
       */
      protected String encodeCookie(SerializableHttpCookie cookie) {
          if (cookie == null) return null;
          ByteArrayOutputStream os = new ByteArrayOutputStream();
          try {
              ObjectOutputStream outputStream = new ObjectOutputStream(os);
              outputStream.writeObject(cookie);
          } catch (IOException e) {
              Log.d(LOG_TAG, "IOException in encodeCookie", e);
              return null;
          }
          return byteArrayToHexString(os.toByteArray());
      }
  
      /**
       * 将字符串反序列化成cookies
       *
       * @param cookieString cookies string
       * @return cookie object
       */
      protected Cookie decodeCookie(String cookieString) {
          byte[] bytes = hexStringToByteArray(cookieString);
          ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
          Cookie cookie = null;
          try {
              ObjectInputStream objectInputStream = new ObjectInputStream(byteArrayInputStream);
              cookie = ((SerializableHttpCookie) objectInputStream.readObject()).getCookie();
          } catch (IOException e) {
              Log.d(LOG_TAG, "IOException in decodeCookie", e);
          } catch (ClassNotFoundException e) {
              Log.d(LOG_TAG, "ClassNotFoundException in decodeCookie", e);
          }
          return cookie;
      }
  
      /**
       * 二进制数组转十六进制字符串
       *
       * @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);
      }
  
      /**
       * 十六进制字符串转二进制数组
       *
       * @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;
      }
  }