java如何在使用HTTPUrlConnection时持久化cookie？

Question

我已经开始使用推荐的HTTPUrlConnection，并离开了DefaultHTTPClient。其中一件我还不能粘合在一起的事情是使用持久的cookie存储。我只想在我的连接上附加一个自定义cookie处理程序/管理器来存储cookie。Android文档并没有太大的帮助，因为它将关于cookies的主题概括为两行

我之前一直在使用LoopJ的PersistentCookieStore，效果很好

你知道我如何在安卓系统中建立一个持久的cookie存储库，并将其连接到我的HTTPUrlConnection上，自动保存和检索cookie吗

谢谢

Answer 1

这花了我几个小时，但我自己设法建立了一个定制的cookie存储

您必须通过以下方式连接：

public class application extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
       CookieManager cmrCookieMan = new CookieManager(new MyCookieStore(this.objContext), CookiePolicy.ACCEPT_ALL);
       CookieHandler.setDefault(cmrCookieMan);
       }
    }

以下是实际存储空间：

/*
 * This is a custom cookie storage for the application. This
 * will store all the cookies to the shared preferences so that it persists
 * across application restarts.
 */
class MyCookieStore implements CookieStore {

    /*
     * The memory storage of the cookies
     */
    private Map<URI, List<HttpCookie>> mapCookies = new HashMap<URI, List<HttpCookie>>();
    /*
     * The instance of the shared preferences
     */
    private final SharedPreferences spePreferences;

    /*
     * @see java.net.CookieStore#add(java.net.URI, java.net.HttpCookie)
     */
    public void add(URI uri, HttpCookie cookie) {

        System.out.println("add");
        System.out.println(cookie.toString());

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

        Editor ediWriter = spePreferences.edit();
        HashSet<String> setCookies = new HashSet<String>();
        setCookies.add(cookie.toString());
        ediWriter.putStringSet(uri.toString(), spePreferences.getStringSet(uri.toString(), setCookies));
        ediWriter.commit();

    }

   /*
    * Constructor
    * 
    * @param  ctxContext the context of the Activity
    */
    @SuppressWarnings("unchecked")
    public MyCookieStore(Context ctxContext) {

        spePreferences = ctxContext.getSharedPreferences("CookiePrefsFile", 0);
        Map<String, ?> prefsMap = spePreferences.getAll();

        for(Map.Entry<String, ?> entry : prefsMap.entrySet()) {

            for (String strCookie : (HashSet<String>) entry.getValue()) {

                if (!mapCookies.containsKey(entry.getKey())) {

                    List<HttpCookie> lstCookies = new ArrayList<HttpCookie>();
                    lstCookies.addAll(HttpCookie.parse(strCookie));

                    try {

                        mapCookies.put(new URI(entry.getKey()), lstCookies);

                    } catch (URISyntaxException e) {

                        e.printStackTrace();

                    }

                } else {

                    List<HttpCookie> lstCookies = mapCookies.get(entry.getKey());
                    lstCookies.addAll(HttpCookie.parse(strCookie));

                    try {

                        mapCookies.put(new URI(entry.getKey()), lstCookies);

                    } catch (URISyntaxException e) {

                        e.printStackTrace();

                    }

                }

                System.out.println(entry.getKey() + ": " + strCookie);

            }

        }

    }

    /*
     * @see java.net.CookieStore#get(java.net.URI)
     */
    public List<HttpCookie> get(URI uri) {

        List<HttpCookie> lstCookies = mapCookies.get(uri);

        if (lstCookies == null)
            mapCookies.put(uri, new ArrayList<HttpCookie>());

        return mapCookies.get(uri);

    }

    /*
     * @see java.net.CookieStore#removeAll()
     */
    public boolean removeAll() {

        mapCookies.clear();
        return true;

    }        

    /*
     * @see java.net.CookieStore#getCookies()
     */
    public List<HttpCookie> getCookies() {

        Collection<List<HttpCookie>> values = mapCookies.values();

        List<HttpCookie> result = new ArrayList<HttpCookie>();
        for (List<HttpCookie> value : values) {                
            result.addAll(value);                
        }

        return result;

    }

    /*
     * @see java.net.CookieStore#getURIs()
     */
    public List<URI> getURIs() {

        Set<URI> keys = mapCookies.keySet();
        return new ArrayList<URI>(keys);

    }

    /*
     * @see java.net.CookieStore#remove(java.net.URI, java.net.HttpCookie)
     */
    public boolean remove(URI uri, HttpCookie cookie) {

        List<HttpCookie> lstCookies = mapCookies.get(uri);

        if (lstCookies == null)
            return false;

        return lstCookies.remove(cookie);

    }

}

Answer 2

在许多自定义CookieStore实现中存在一些基本问题

第一个问题是将HttpCookie序列化为字符串-因为HttpCookie.toString()方法的结果不适用于HttpCookie.parse(String header)方法，所以HttpCookie.toString()方法对此是不可接受的

第二个问题：大多数CookieStore实现（例如，here）没有考虑HttpCookie.maxAge字段的格式。这是cookie live的秒数。但如果你只是坚持它的价值，过一段时间再取消它，那就错了。必须将maxAge字段转换为类似"expire_at"的内容，并将其持久化，而不是maxAge

Answer 3

在下面的链接中签出实现。它通过主机名保存cookie，就像原始java一样。网InMemoryCookieStore的实现确实如此

此外，它还包含SerializableHttpCookie，以便能够将完整的HashMap序列化到SharedReferences中

https://gist.github.com/jacobtabak/78e226673d5a6a4c4367

Answer 4

我使用了上面的答案，但将add方法更改为以下方法，以处理来自同一URI的多个cookie（出于某种原因，这个带有GAE的cookie存储区将会话令牌和记住令牌视为来自同一URI的两个单独cookie）：

public void add(URI uri, HttpCookie cookie) {


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

    Editor ediWriter = spePreferences.edit();
    HashSet<String> setCookies = new HashSet<String>();
    setCookies.add(cookie.toString());
    HashSet<String> emptyCookieSet = new HashSet<String>();
    if(spePreferences.contains(uri.toString())){
        emptyCookieSet = (HashSet<String>) spePreferences.getStringSet(uri.toString(), emptyCookieSet);
        if(!emptyCookieSet.isEmpty()){
            if(!emptyCookieSet.contains(cookie.toString())){
            emptyCookieSet.add(cookie.toString());
            ediWriter.putStringSet(uri.toString(), emptyCookieSet);
            }
        }
    }
    else{
        ediWriter.putStringSet(uri.toString(), setCookies);
    }
    ediWriter.commit();
} 

以及访问和创建组合cookie：

MyCookieStore store = new MyCookieStore(this.context, false);
String cookie = TextUtils.join(",", store.get(new URI(URLString)));

连接到连接：

URL urlToRequest = new URL(stringPath);
HttpURLConnection urlConnection = (HttpURLConnection) urlToRequest.openConnection();
urlConnection.setRequestProperty("Cookie", cookie);