使用okhttp 2在Android持久cookie存储 [英] Persistent Cookie store using okhttp 2 on Android

问题描述

在我的Andr​​oid应用程序，我想从 Android的异步HTTP 切换到 okhttp 支持异步信德网络版2.0。前者附带的<一个实施href="http://loopj.com/android-async-http/doc/com/loopj/android/http/PersistentCookieStore.html">persistent饼干存储，我不知道如何实现像这样的 okhttp 。

In my Android app, I am trying to switch from android-async-http to okhttp which supports async networking sind version 2.0. While the former ships with an implementation of a persistent cookie storage, I don't know how to implement something like this for okhttp.

在我的应用程序我有在这期间 GET 请求被发送，如果成功，应该设置一个cookie的登录程序。此cookie应该被附加到所有后续的网络请求，并应生存应用程序重新启动。

In my app I have a login routine during which a get request is sent that, if successful, should set a cookie. This cookie should be appended to all subsequent network requests and should survive application restarts.

我发现上所以下面的答案，表明下面这段$的C $ C，如果在应用程序中的某个地方执行，激活持续的cookie管理和 okhttp 将使用它：

I found the following answer on SO, indicating that the following piece of code, if executed somewhere in the app, activates persistent cookie management and okhttp would use it:

CookieManager cookieManager = new CookieManager();
cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
CookieHandler.setDefault(cookieManager);

不过，对我来说这是行不通的。是 CookieManager 的正确的方式去？我怎么能监视的饼干被设定并存储为进一步调试这个问题？

However, for me it does not work. Is the CookieManager the right way to go? How could I monitor which cookies were set and stored to further debug the issue?

推荐答案

把code到自定义应用程序的的onCreate 功能解决了这个问题。它的工作原理吧。

Putting the code into a custom Application's onCreate function solves the issue. It works now.

public class MyApplication extends Application {
    public void onCreate() {
        super.onCreate();

        // enable cookies
        java.net.CookieManager cookieManager = new java.net.CookieManager();
        cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
        CookieHandler.setDefault(cookieManager);
    }
}

---

我设法持久Cookie与 okhttp 具有以下的CookieStore ，这部分是从一个复制 Android的异步HTTP 。它的工作原理与API拉特9，也许少了。

---

I managed to get persistent cookies with okhttp with the following CookieStore, which is partly copied from the one of android-async-http. It works with API lvl 9 and maybe fewer.

import android.content.Context;
import android.content.SharedPreferences;
import android.text.TextUtils;
import android.util.Log;

import java.io.*;
import java.net.CookieStore;
import java.net.HttpCookie;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;

/**
 * A persistent cookie store which implements the Apache HttpClient CookieStore interface.
 * Cookies are stored and will persist on the user's device between application sessions since they
 * are serialized and stored in SharedPreferences. Instances of this class are
 * designed to be used with AsyncHttpClient#setCookieStore, but can also be used with a
 * regular old apache HttpClient/HttpContext if you prefer.
 */
public class PersistentCookieStore implements CookieStore {

    private static final String LOG_TAG = "PersistentCookieStore";
    private static final String COOKIE_PREFS = "CookiePrefsFile";
    private static final String COOKIE_NAME_PREFIX = "cookie_";

    private final HashMap<String, ConcurrentHashMap<String, HttpCookie>> cookies;
    private final SharedPreferences cookiePrefs;

    /**
     * Construct a persistent cookie store.
     *
     * @param context Context to attach cookie store to
     */
    public PersistentCookieStore(Context context) {
        cookiePrefs = context.getSharedPreferences(COOKIE_PREFS, 0);
        cookies = new HashMap<String, ConcurrentHashMap<String, HttpCookie>>();

        // Load any previously stored cookies into the store
        Map<String, ?> prefsMap = cookiePrefs.getAll();
        for(Map.Entry<String, ?> entry : prefsMap.entrySet()) {
            if (((String)entry.getValue()) != null && !((String)entry.getValue()).startsWith(COOKIE_NAME_PREFIX)) {
                String[] cookieNames = TextUtils.split((String)entry.getValue(), ",");
                for (String name : cookieNames) {
                    String encodedCookie = cookiePrefs.getString(COOKIE_NAME_PREFIX + name, null);
                    if (encodedCookie != null) {
                        HttpCookie decodedCookie = decodeCookie(encodedCookie);
                        if (decodedCookie != null) {
                            if(!cookies.containsKey(entry.getKey()))
                                cookies.put(entry.getKey(), new ConcurrentHashMap<String, HttpCookie>());
                            cookies.get(entry.getKey()).put(name, decodedCookie);
                        }
                    }
                }

            }
        }
    }

    @Override
    public void add(URI uri, HttpCookie cookie) {
        String name = getCookieToken(uri, cookie);

        // Save cookie into local store, or remove if expired
        if (!cookie.hasExpired()) {
            if(!cookies.containsKey(uri.getHost()))
                cookies.put(uri.getHost(), new ConcurrentHashMap<String, HttpCookie>());
            cookies.get(uri.getHost()).put(name, cookie);
        } else {
            if(cookies.containsKey(uri.toString()))
                cookies.get(uri.getHost()).remove(name);
        }

        // Save cookie into persistent store
        SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
        prefsWriter.putString(uri.getHost(), TextUtils.join(",", cookies.get(uri.getHost()).keySet()));
        prefsWriter.putString(COOKIE_NAME_PREFIX + name, encodeCookie(new SerializableHttpCookie(cookie)));
        prefsWriter.commit();
    }

    protected String getCookieToken(URI uri, HttpCookie cookie) {
        return cookie.getName() + cookie.getDomain();
    }

    @Override
    public List<HttpCookie> get(URI uri) {
        ArrayList<HttpCookie> ret = new ArrayList<HttpCookie>();
        if(cookies.containsKey(uri.getHost()))
            ret.addAll(cookies.get(uri.getHost()).values());
        return ret;
    }

    @Override
    public boolean removeAll() {
        SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
        prefsWriter.clear();
        prefsWriter.commit();
        cookies.clear();
        return true;
    }


    @Override
    public boolean remove(URI uri, HttpCookie cookie) {
        String name = getCookieToken(uri, cookie);

        if(cookies.containsKey(uri.getHost()) && cookies.get(uri.getHost()).containsKey(name)) {
            cookies.get(uri.getHost()).remove(name);

            SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
            if(cookiePrefs.contains(COOKIE_NAME_PREFIX + name)) {
                prefsWriter.remove(COOKIE_NAME_PREFIX + name);
            }
            prefsWriter.putString(uri.getHost(), TextUtils.join(",", cookies.get(uri.getHost()).keySet()));
            prefsWriter.commit();

            return true;
        } else {
            return false;
        }
    }

    @Override
    public List<HttpCookie> getCookies() {
        ArrayList<HttpCookie> ret = new ArrayList<HttpCookie>();
        for (String key : cookies.keySet())
            ret.addAll(cookies.get(key).values());

        return ret;
    }

    @Override
    public List<URI> getURIs() {
        ArrayList<URI> ret = new ArrayList<URI>();
        for (String key : cookies.keySet())
            try {
                ret.add(new URI(key));
            } catch (URISyntaxException e) {
                e.printStackTrace();
            }

        return ret;
    }

    /**
     * Serializes Cookie object into String
     *
     * @param cookie cookie to be encoded, can be null
     * @return cookie encoded as 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());
    }

    /**
     * Returns cookie 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 = ((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;
    }

    /**
     * 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;
    }
}

在 SerializableHttpCookie.java ：

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

public class SerializableHttpCookie implements Serializable {
    private static final long serialVersionUID = 6374381323722046732L;

    private transient final HttpCookie cookie;
    private transient HttpCookie clientCookie;

    public SerializableHttpCookie(HttpCookie cookie) {
        this.cookie = cookie;
    }

    public HttpCookie getCookie() {
        HttpCookie bestCookie = cookie;
        if (clientCookie != null) {
            bestCookie = clientCookie;
        }
        return bestCookie;
    }

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

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

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