diff options
Diffstat (limited to 'mobile/android/thirdparty/com/squareup/picasso/UrlConnectionDownloader.java')
-rw-r--r-- | mobile/android/thirdparty/com/squareup/picasso/UrlConnectionDownloader.java | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/mobile/android/thirdparty/com/squareup/picasso/UrlConnectionDownloader.java b/mobile/android/thirdparty/com/squareup/picasso/UrlConnectionDownloader.java new file mode 100644 index 0000000000..50f9b2b983 --- /dev/null +++ b/mobile/android/thirdparty/com/squareup/picasso/UrlConnectionDownloader.java @@ -0,0 +1,100 @@ +/* + * Copyright (C) 2013 Square, Inc. + * + * 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.squareup.picasso; + +import android.content.Context; +import android.net.Uri; +import android.net.http.HttpResponseCache; +import android.os.Build; +import java.io.File; +import java.io.IOException; +import java.net.HttpURLConnection; +import java.net.URL; + +import static com.squareup.picasso.Utils.parseResponseSourceHeader; + +/** + * A {@link Downloader} which uses {@link HttpURLConnection} to download images. A disk cache of 2% + * of the total available space will be used (capped at 50MB) will automatically be installed in the + * application's cache directory, when available. + */ +public class UrlConnectionDownloader implements Downloader { + static final String RESPONSE_SOURCE = "X-Android-Response-Source"; + + private static final Object lock = new Object(); + static volatile Object cache; + + private final Context context; + + public UrlConnectionDownloader(Context context) { + this.context = context.getApplicationContext(); + } + + protected HttpURLConnection openConnection(Uri path) throws IOException { + HttpURLConnection connection = (HttpURLConnection) new URL(path.toString()).openConnection(); + connection.setConnectTimeout(Utils.DEFAULT_CONNECT_TIMEOUT); + connection.setReadTimeout(Utils.DEFAULT_READ_TIMEOUT); + return connection; + } + + @Override public Response load(Uri uri, boolean localCacheOnly) throws IOException { + if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) { + installCacheIfNeeded(context); + } + + HttpURLConnection connection = openConnection(uri); + connection.setUseCaches(true); + if (localCacheOnly) { + connection.setRequestProperty("Cache-Control", "only-if-cached,max-age=" + Integer.MAX_VALUE); + } + + int responseCode = connection.getResponseCode(); + if (responseCode >= 300) { + connection.disconnect(); + throw new ResponseException(responseCode + " " + connection.getResponseMessage()); + } + + boolean fromCache = parseResponseSourceHeader(connection.getHeaderField(RESPONSE_SOURCE)); + + return new Response(connection.getInputStream(), fromCache); + } + + private static void installCacheIfNeeded(Context context) { + // DCL + volatile should be safe after Java 5. + if (cache == null) { + try { + synchronized (lock) { + if (cache == null) { + cache = ResponseCacheIcs.install(context); + } + } + } catch (IOException ignored) { + } + } + } + + private static class ResponseCacheIcs { + static Object install(Context context) throws IOException { + File cacheDir = Utils.createDefaultCacheDir(context); + HttpResponseCache cache = HttpResponseCache.getInstalled(); + if (cache == null) { + long maxSize = Utils.calculateDiskCacheSize(cacheDir); + cache = HttpResponseCache.install(cacheDir, maxSize); + } + return cache; + } + } +} |