android 持久化保存cookie
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在解析网页信息的时候,需要登录后才能访问,所以使用httpclient模拟登录,然后把cookie保存下来,以供下一次访问使用,这时就需要持久化cookie中的内容。
一、请求网络获取cookie
先看一下下面的代码:
- <span style="font-size:14px;"><span style="white-space:pre"> </span> DefaultHttpClient httpclient = new DefaultHttpClient();
- HttpGet httpget = new HttpGet("http://www.hlovey.com");
- HttpResponse response = httpclient.execute(httpget);
- HttpEntity entity = response.getEntity();
- List<Cookie> cookies = httpclient.getCookieStore().getCookies();</span>
- <span style="white-space:pre"> </span>HttpPost httpPost = new HttpPost(url);
- List<NameValuePair> formparams = new ArrayList<NameValuePair>();
- formparams.add(new BasicNameValuePair("id", userid));
- formparams.add(new BasicNameValuePair("passwd", passwd));
- UrlEncodedFormEntity entity;
- try {
- entity = new UrlEncodedFormEntity(formparams, mobileSMTHEncoding);
- } catch (UnsupportedEncodingException e1) {
- return 3;
- }
- httpPost.setEntity(entity);
- httpPost.setHeader("User-Agent", userAgent);
- HttpResponse response = httpClient.execute(httpPost);
保存cookie有两种方式一种是数据库,另一种是SharedPreferences,其中http://blog.csdn.net/junjieking/article/details/7658551是使用数据库来保存的,这里我是使用SharedPreferences保存。
- <span style="white-space:pre"> </span>package com.smthbest.smth.util;
- <span style="white-space:pre"> </span>import java.util.Locale;
- import android.content.Context;
- import android.content.SharedPreferences;
- import android.text.TextUtils;
- import android.util.Log;
- import org.apache.http.client.CookieStore;
- import org.apache.http.cookie.Cookie;
- import java.io.ByteArrayInputStream;
- import java.io.ByteArrayOutputStream;
- import java.io.ObjectInputStream;
- import java.io.ObjectOutputStream;
- import java.util.ArrayList;
- import java.util.Date;
- import java.util.List;
- import java.util.Locale;
- import java.util.concurrent.ConcurrentHashMap;
- 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_STORE = "names";
- private static final String COOKIE_NAME_PREFIX = "cookie_";
- private boolean omitNonPersistentCookies = false;
- private final ConcurrentHashMap<String, Cookie> 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 ConcurrentHashMap<String, Cookie>();
- // Load any previously stored cookies into the store
- String storedCookieNames = cookiePrefs.getString(COOKIE_NAME_STORE, null);
- if (storedCookieNames != null) {
- String[] cookieNames = TextUtils.split(storedCookieNames, ",");
- for (String name : cookieNames) {
- String encodedCookie = cookiePrefs.getString(COOKIE_NAME_PREFIX + name, null);
- if (encodedCookie != null) {
- Cookie decodedCookie = decodeCookie(encodedCookie);
- if (decodedCookie != null) {
- cookies.put(name, decodedCookie);
- }
- }
- }
- // Clear out expired cookies
- clearExpired(new Date());
- }
- }
- @Override
- public void addCookie(Cookie cookie) {
- if (omitNonPersistentCookies && !cookie.isPersistent())
- return;
- String name = cookie.getName() + cookie.getDomain();
- // Save cookie into local store, or remove if expired
- if (!cookie.isExpired(new Date())) {
- cookies.put(name, cookie);
- } else {
- cookies.remove(name);
- }
- // Save cookie into persistent store
- SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
- prefsWriter.putString(COOKIE_NAME_STORE, TextUtils.join(",", cookies.keySet()));
- prefsWriter.putString(COOKIE_NAME_PREFIX + name, encodeCookie(new SerializableCookie(cookie)));
- prefsWriter.commit();
- }
- @Override
- public void clear() {
- // Clear cookies from persistent store
- SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
- for (String name : cookies.keySet()) {
- prefsWriter.remove(COOKIE_NAME_PREFIX + name);
- }
- prefsWriter.remove(COOKIE_NAME_STORE);
- prefsWriter.commit();
- // Clear cookies from local store
- cookies.clear();
- }
- @Override
- public boolean clearExpired(Date date) {
- boolean clearedAny = false;
- SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
- for (ConcurrentHashMap.Entry<String, Cookie> entry : cookies.entrySet()) {
- String name = entry.getKey();
- Cookie cookie = entry.getValue();
- if (cookie.isExpired(date)) {
- // Clear cookies from local store
- cookies.remove(name);
- // Clear cookies from persistent store
- prefsWriter.remove(COOKIE_NAME_PREFIX + name);
- // We've cleared at least one
- clearedAny = true;
- }
- }
- // Update names in persistent store
- if (clearedAny) {
- prefsWriter.putString(COOKIE_NAME_STORE, TextUtils.join(",", cookies.keySet()));
- }
- prefsWriter.commit();
- return clearedAny;
- }
- @Override
- public List<Cookie> getCookies() {
- return new ArrayList<Cookie>(cookies.values());
- }
- /**
- * Will make PersistentCookieStore instance ignore Cookies, which are non-persistent by
- * signature (`Cookie.isPersistent`)
- *
- * @param omitNonPersistentCookies true if non-persistent cookies should be omited
- */
- public void setOmitNonPersistentCookies(boolean omitNonPersistentCookies) {
- this.omitNonPersistentCookies = omitNonPersistentCookies;
- }
- /**
- * Non-standard helper method, to delete cookie
- *
- * @param cookie cookie to be removed
- */
- public void deleteCookie(Cookie cookie) {
- String name = cookie.getName();
- cookies.remove(name);
- SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
- prefsWriter.remove(COOKIE_NAME_PREFIX + name);
- prefsWriter.commit();
- }
- /**
- * Serializes Cookie object into String
- *
- * @param cookie cookie to be encoded, can be null
- * @return cookie encoded as String
- */
- protected String encodeCookie(SerializableCookie cookie) {
- if (cookie == null)
- return null;
- ByteArrayOutputStream os = new ByteArrayOutputStream();
- try {
- ObjectOutputStream outputStream = new ObjectOutputStream(os);
- outputStream.writeObject(cookie);
- } catch (Exception 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 Cookie decodeCookie(String cookieString) {
- byte[] bytes = hexStringToByteArray(cookieString);
- ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
- Cookie cookie = null;
- try {
- ObjectInputStream objectInputStream = new ObjectInputStream(byteArrayInputStream);
- cookie = ((SerializableCookie) objectInputStream.readObject()).getCookie();
- } catch (Exception exception) {
- Log.d(LOG_TAG, "decodeCookie failed", exception);
- }
- return cookie;
- }
- /**
- * Using some super basic byte array <-> 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;
- }
- }
- <span style="white-space:pre"> </span>PersistentCookieStore myCookieStore = App.getInstance().getPersistentCookieStore();
- List<Cookie> cookies = httpClient.getCookieStore().getCookies();
- for (Cookie cookie:cookies){
- myCookieStore.addCookie(cookie);
- }
三、cookie的使用
- PersistentCookieStore cookieStore = new PersistentCookieStore(SmthBestApp.getInstance().getApplicationContext());
- httpClient.setCookieStore(cookieStore);
- HttpResponse response = httpClient.execute(httpget);
四、SerializableCookie
- /**
- * A wrapper class around {@link org.apache.http.cookie.Cookie} and/or {@link org.apache.http.impl.cookie.BasicClientCookie} designed for use in {@link
- * PersistentCookieStore}.
- */
- public class SerializableCookie implements Serializable {
- private static final long serialVersionUID = 6374381828722046732L;
- private transient final Cookie cookie;
- private transient BasicClientCookie clientCookie;
- public SerializableCookie(Cookie cookie) {
- this.cookie = cookie;
- }
- public Cookie getCookie() {
- Cookie 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.getDomain());
- out.writeObject(cookie.getExpiryDate());
- out.writeObject(cookie.getPath());
- out.writeInt(cookie.getVersion());
- out.writeBoolean(cookie.isSecure());
- }
- private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
- String name = (String) in.readObject();
- String value = (String) in.readObject();
- clientCookie = new BasicClientCookie(name, value);
- clientCookie.setComment((String) in.readObject());
- clientCookie.setDomain((String) in.readObject());
- clientCookie.setExpiryDate((Date) in.readObject());
- clientCookie.setPath((String) in.readObject());
- clientCookie.setVersion(in.readInt());
- clientCookie.setSecure(in.readBoolean());
- }
- }
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