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mobile/android/thirdparty/com/squareup/picasso/UrlConnectionDownloader.java@6474c204b198 (annotated)

mobile/android/thirdparty/com/squareup/picasso/UrlConnectionDownloader.java

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/*
michael@0	2	* Copyright (C) 2013 Square, Inc.
michael@0	3	*
michael@0	4	* Licensed under the Apache License, Version 2.0 (the "License");
michael@0	5	* you may not use this file except in compliance with the License.
michael@0	6	* You may obtain a copy of the License at
michael@0	7	*
michael@0	8	* http://www.apache.org/licenses/LICENSE-2.0
michael@0	9	*
michael@0	10	* Unless required by applicable law or agreed to in writing, software
michael@0	11	* distributed under the License is distributed on an "AS IS" BASIS,
michael@0	12	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0	13	* See the License for the specific language governing permissions and
michael@0	14	* limitations under the License.
michael@0	15	*/
michael@0	16	package com.squareup.picasso;
michael@0	17
michael@0	18	import android.content.Context;
michael@0	19	import android.net.Uri;
michael@0	20	import android.net.http.HttpResponseCache;
michael@0	21	import android.os.Build;
michael@0	22	import java.io.File;
michael@0	23	import java.io.IOException;
michael@0	24	import java.net.HttpURLConnection;
michael@0	25	import java.net.URL;
michael@0	26
michael@0	27	import static com.squareup.picasso.Utils.parseResponseSourceHeader;
michael@0	28
michael@0	29	/**
michael@0	30	* A {@link Downloader} which uses {@link HttpURLConnection} to download images. A disk cache of 2%
michael@0	31	* of the total available space will be used (capped at 50MB) will automatically be installed in the
michael@0	32	* application's cache directory, when available.
michael@0	33	*/
michael@0	34	public class UrlConnectionDownloader implements Downloader {
michael@0	35	static final String RESPONSE_SOURCE = "X-Android-Response-Source";
michael@0	36
michael@0	37	private static final Object lock = new Object();
michael@0	38	static volatile Object cache;
michael@0	39
michael@0	40	private final Context context;
michael@0	41
michael@0	42	public UrlConnectionDownloader(Context context) {
michael@0	43	this.context = context.getApplicationContext();
michael@0	44	}
michael@0	45
michael@0	46	protected HttpURLConnection openConnection(Uri path) throws IOException {
michael@0	47	HttpURLConnection connection = (HttpURLConnection) new URL(path.toString()).openConnection();
michael@0	48	connection.setConnectTimeout(Utils.DEFAULT_CONNECT_TIMEOUT);
michael@0	49	connection.setReadTimeout(Utils.DEFAULT_READ_TIMEOUT);
michael@0	50	return connection;
michael@0	51	}
michael@0	52
michael@0	53	@Override public Response load(Uri uri, boolean localCacheOnly) throws IOException {
michael@0	54	if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
michael@0	55	installCacheIfNeeded(context);
michael@0	56	}
michael@0	57
michael@0	58	HttpURLConnection connection = openConnection(uri);
michael@0	59	connection.setUseCaches(true);
michael@0	60	if (localCacheOnly) {
michael@0	61	connection.setRequestProperty("Cache-Control", "only-if-cached,max-age=" + Integer.MAX_VALUE);
michael@0	62	}
michael@0	63
michael@0	64	int responseCode = connection.getResponseCode();
michael@0	65	if (responseCode >= 300) {
michael@0	66	connection.disconnect();
michael@0	67	throw new ResponseException(responseCode + " " + connection.getResponseMessage());
michael@0	68	}
michael@0	69
michael@0	70	boolean fromCache = parseResponseSourceHeader(connection.getHeaderField(RESPONSE_SOURCE));
michael@0	71
michael@0	72	return new Response(connection.getInputStream(), fromCache);
michael@0	73	}
michael@0	74
michael@0	75	private static void installCacheIfNeeded(Context context) {
michael@0	76	// DCL + volatile should be safe after Java 5.
michael@0	77	if (cache == null) {
michael@0	78	try {
michael@0	79	synchronized (lock) {
michael@0	80	if (cache == null) {
michael@0	81	cache = ResponseCacheIcs.install(context);
michael@0	82	}
michael@0	83	}
michael@0	84	} catch (IOException ignored) {
michael@0	85	}
michael@0	86	}
michael@0	87	}
michael@0	88
michael@0	89	private static class ResponseCacheIcs {
michael@0	90	static Object install(Context context) throws IOException {
michael@0	91	File cacheDir = Utils.createDefaultCacheDir(context);
michael@0	92	HttpResponseCache cache = HttpResponseCache.getInstalled();
michael@0	93	if (cache == null) {
michael@0	94	long maxSize = Utils.calculateDiskCacheSize(cacheDir);
michael@0	95	cache = HttpResponseCache.install(cacheDir, maxSize);
michael@0	96	}
michael@0	97	return cache;
michael@0	98	}
michael@0	99	}
michael@0	100	}