Android Open Source - BagOfPix Image Response Cache






From Project

Back to project page BagOfPix.

License

The source code is released under:

MIT License

If you think the Android project BagOfPix listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

/**
 * Copyright 2010-present Facebook./*w  w  w  .j  a v a  2 s.  c om*/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.facebook.internal;

import android.content.Context;
import android.util.Log;
import com.facebook.LoggingBehavior;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;

class ImageResponseCache {
    static final String TAG = ImageResponseCache.class.getSimpleName();

    private volatile static FileLruCache imageCache;

    synchronized static FileLruCache getCache(Context context) throws IOException{
        if (imageCache == null) {
            imageCache = new FileLruCache(context.getApplicationContext(), TAG, new FileLruCache.Limits());
        }
        return imageCache;
    }

    // Get stream from cache, or return null if the image is not cached.
    // Does not throw if there was an error.
    static InputStream getCachedImageStream(URI url, Context context) {
        InputStream imageStream = null;
        if (url != null) {
            if (isCDNURL(url)) {
                try {
                    FileLruCache cache = getCache(context);
                    imageStream = cache.get(url.toString());
                } catch (IOException e) {
                    Logger.log(LoggingBehavior.CACHE, Log.WARN, TAG, e.toString());
                }
            }
        }

        return imageStream;
    }

    static InputStream interceptAndCacheImageStream(Context context, HttpURLConnection connection) throws IOException {
        InputStream stream = null;
        if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            URL url = connection.getURL();
            stream = connection.getInputStream(); // Default stream in case caching fails
            try {
                if (isCDNURL(url.toURI())) {
                    FileLruCache cache = getCache(context);

                    // Wrap stream with a caching stream
                    stream = cache.interceptAndPut(
                            url.toString(),
                            new BufferedHttpInputStream(stream, connection));
                }
            } catch (IOException e) {
                // Caching is best effort
            } catch (URISyntaxException e) {
            // Caching is best effort
            }
        }
        return stream;
    }

   private static boolean isCDNURL(URI url) {
        if (url != null) {
            String uriHost = url.getHost();

            if (uriHost.endsWith("fbcdn.net")) {
                return true;
            }

            if (uriHost.startsWith("fbcdn") && uriHost.endsWith("akamaihd.net")) {
                return true;
            }
        }

        return false;
    }

    static void clearCache(Context context) {
        try {
            getCache(context).clearCache();
        } catch (IOException e) {
            Logger.log(LoggingBehavior.CACHE, Log.WARN, TAG, "clearCache failed " + e.getMessage());
        }
    }

    private static class BufferedHttpInputStream extends BufferedInputStream {
        HttpURLConnection connection;
        BufferedHttpInputStream(InputStream stream, HttpURLConnection connection) {
            super(stream, Utility.DEFAULT_STREAM_BUFFER_SIZE);
            this.connection = connection;
        }

        @Override
        public void close() throws IOException {
            super.close();
            Utility.disconnectQuietly(connection);
        }
    }
}




Java Source Code List

com.example.bagofpix.CreateStory.java
com.example.bagofpix.DBHandler.java
com.example.bagofpix.DBReader.java
com.example.bagofpix.ImportPhoto.java
com.example.bagofpix.MainActivity.java
com.example.bagofpix.Photo.java
com.example.bagofpix.Story.java
com.example.bagofpix.ViewStory.java
com.facebook.AccessTokenSource.java
com.facebook.AccessToken.java
com.facebook.AppEventsConstants.java
com.facebook.AppEventsLogger.java
com.facebook.AppLinkData.java
com.facebook.AuthorizationClient.java
com.facebook.FacebookAuthorizationException.java
com.facebook.FacebookDialogException.java
com.facebook.FacebookException.java
com.facebook.FacebookGraphObjectException.java
com.facebook.FacebookOperationCanceledException.java
com.facebook.FacebookRequestError.java
com.facebook.FacebookSdkVersion.java
com.facebook.FacebookServiceException.java
com.facebook.GetTokenClient.java
com.facebook.HttpMethod.java
com.facebook.InsightsLogger.java
com.facebook.LegacyHelper.java
com.facebook.LoggingBehavior.java
com.facebook.LoginActivity.java
com.facebook.NativeAppCallAttachmentStore.java
com.facebook.NativeAppCallContentProvider.java
com.facebook.NonCachingTokenCachingStrategy.java
com.facebook.RequestAsyncTask.java
com.facebook.RequestBatch.java
com.facebook.Request.java
com.facebook.Response.java
com.facebook.SessionDefaultAudience.java
com.facebook.SessionLoginBehavior.java
com.facebook.SessionState.java
com.facebook.Session.java
com.facebook.Settings.java
com.facebook.SharedPreferencesTokenCachingStrategy.java
com.facebook.TestSession.java
com.facebook.TokenCachingStrategy.java
com.facebook.UiLifecycleHelper.java
com.facebook.android.AsyncFacebookRunner.java
com.facebook.android.DialogError.java
com.facebook.android.FacebookError.java
com.facebook.android.Facebook.java
com.facebook.android.FbDialog.java
com.facebook.android.Util.java
com.facebook.internal.AnalyticsEvents.java
com.facebook.internal.CacheableRequestBatch.java
com.facebook.internal.FileLruCache.java
com.facebook.internal.ImageDownloader.java
com.facebook.internal.ImageRequest.java
com.facebook.internal.ImageResponseCache.java
com.facebook.internal.ImageResponse.java
com.facebook.internal.Logger.java
com.facebook.internal.NativeProtocol.java
com.facebook.internal.PlatformServiceClient.java
com.facebook.internal.ServerProtocol.java
com.facebook.internal.SessionAuthorizationType.java
com.facebook.internal.SessionTracker.java
com.facebook.internal.UrlRedirectCache.java
com.facebook.internal.Utility.java
com.facebook.internal.Validate.java
com.facebook.internal.WorkQueue.java
com.facebook.internal.package-info.java
com.facebook.model.CreateGraphObject.java
com.facebook.model.GraphLocation.java
com.facebook.model.GraphMultiResult.java
com.facebook.model.GraphObjectList.java
com.facebook.model.GraphObject.java
com.facebook.model.GraphPlace.java
com.facebook.model.GraphUser.java
com.facebook.model.JsonUtil.java
com.facebook.model.OpenGraphAction.java
com.facebook.model.OpenGraphObject.java
com.facebook.model.PropertyName.java
com.facebook.widget.FacebookDialog.java
com.facebook.widget.FacebookFragment.java
com.facebook.widget.FriendPickerFragment.java
com.facebook.widget.GraphObjectAdapter.java
com.facebook.widget.GraphObjectCursor.java
com.facebook.widget.GraphObjectPagingLoader.java
com.facebook.widget.LoginButton.java
com.facebook.widget.PickerFragment.java
com.facebook.widget.PlacePickerFragment.java
com.facebook.widget.ProfilePictureView.java
com.facebook.widget.SimpleGraphObjectCursor.java
com.facebook.widget.UserSettingsFragment.java
com.facebook.widget.WebDialog.java