在 Android volley 库中使用 cookie [英] Using cookies with Android volley library

问题描述

有人知道如何使用 com.android.volley 库将会话 cookie 附加到请求中吗?当我登录到一个网站时，它会给我一个会话 cookie.浏览器会随任何后续请求一起发回该 cookie.Volley 似乎不会这样做，至少不会自动这样做.

Does anybody know how to attach a session cookie to the request using com.android.volley library? When I log in to a web site it gives me a session cookie. Browser would send that cookie back with any subsequent request. Volley does not seem to do that, at least not automatically.

谢谢.

推荐答案

vmirinov 是对的！

vmirinov is right!

这是我解决问题的方法:

Here is how I solved the problem:

请求类:

public class StringRequest extends com.android.volley.toolbox.StringRequest {

    private final Map<String, String> _params;

    /**
     * @param method
     * @param url
     * @param params
     *            A {@link HashMap} to post with the request. Null is allowed
     *            and indicates no parameters will be posted along with request.
     * @param listener
     * @param errorListener
     */
    public StringRequest(int method, String url, Map<String, String> params, Listener<String> listener,
            ErrorListener errorListener) {
        super(method, url, listener, errorListener);

        _params = params;
    }

    @Override
    protected Map<String, String> getParams() {
        return _params;
    }

    /* (non-Javadoc)
     * @see com.android.volley.toolbox.StringRequest#parseNetworkResponse(com.android.volley.NetworkResponse)
     */
    @Override
    protected Response<String> parseNetworkResponse(NetworkResponse response) {
        // since we don't know which of the two underlying network vehicles
        // will Volley use, we have to handle and store session cookies manually
        MyApp.get().checkSessionCookie(response.headers);

        return super.parseNetworkResponse(response);
    }

    /* (non-Javadoc)
     * @see com.android.volley.Request#getHeaders()
     */
    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        Map<String, String> headers = super.getHeaders();

        if (headers == null
                || headers.equals(Collections.emptyMap())) {
            headers = new HashMap<String, String>();
        }

        MyApp.get().addSessionCookie(headers);

        return headers;
    }
}

和我的应用程序:

public class MyApp extends Application {
    private static final String SET_COOKIE_KEY = "Set-Cookie";
    private static final String COOKIE_KEY = "Cookie";
    private static final String SESSION_COOKIE = "sessionid";

    private static MyApp _instance;
  private RequestQueue _requestQueue;
  private SharedPreferences _preferences;

    public static MyApp get() {
        return _instance;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        _instance = this;
            _preferences = PreferenceManager.getDefaultSharedPreferences(this);
        _requestQueue = Volley.newRequestQueue(this);
    }

    public RequestQueue getRequestQueue() {
        return _requestQueue;
    }


    /**
     * Checks the response headers for session cookie and saves it
     * if it finds it.
     * @param headers Response Headers.
     */
    public final void checkSessionCookie(Map<String, String> headers) {
        if (headers.containsKey(SET_COOKIE_KEY)
                && headers.get(SET_COOKIE_KEY).startsWith(SESSION_COOKIE)) {
                String cookie = headers.get(SET_COOKIE_KEY);
                if (cookie.length() > 0) {
                    String[] splitCookie = cookie.split(";");
                    String[] splitSessionId = splitCookie[0].split("=");
                    cookie = splitSessionId[1];
                    Editor prefEditor = _preferences.edit();
                    prefEditor.putString(SESSION_COOKIE, cookie);
                    prefEditor.commit();
                }
            }
    }

    /**
     * Adds session cookie to headers if exists.
     * @param headers
     */
    public final void addSessionCookie(Map<String, String> headers) {
        String sessionId = _preferences.getString(SESSION_COOKIE, "");
        if (sessionId.length() > 0) {
            StringBuilder builder = new StringBuilder();
            builder.append(SESSION_COOKIE);
            builder.append("=");
            builder.append(sessionId);
            if (headers.containsKey(COOKIE_KEY)) {
                builder.append("; ");
                builder.append(headers.get(COOKIE_KEY));
            }
            headers.put(COOKIE_KEY, builder.toString());
        }
    }

}

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