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Issue 29350042: Issue 4023 - Move storage of subscription lists to localStorage (Closed)
Patch Set: Make sure entry["compressed"] is truthful Created Sept. 8, 2016, 11:40 p.m.
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1 /* 1 /*
2 * This file is part of Adblock Plus <https://adblockplus.org/>, 2 * This file is part of Adblock Plus <https://adblockplus.org/>,
3 * Copyright (C) 2006-2016 Eyeo GmbH 3 * Copyright (C) 2006-2016 Eyeo GmbH
4 * 4 *
5 * Adblock Plus is free software: you can redistribute it and/or modify 5 * Adblock Plus is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 3 as 6 * it under the terms of the GNU General Public License version 3 as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
8 * 8 *
9 * Adblock Plus is distributed in the hope that it will be useful, 9 * Adblock Plus is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details. 12 * GNU General Public License for more details.
13 * 13 *
14 * You should have received a copy of the GNU General Public License 14 * You should have received a copy of the GNU General Public License
15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>. 15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>.
16 */ 16 */
17 17
18 "use strict";
19
18 const keyPrefix = "file:"; 20 const keyPrefix = "file:";
19 21
20 function fileToKey(file) 22 function fileToKey(file)
21 { 23 {
22 return keyPrefix + (file instanceof FakeFile ? file.path : file.spec); 24 return keyPrefix + (file instanceof FakeFile ? file.path : file.spec);
23 } 25 }
24 26
25 function loadFile(file, successCallback, errorCallback) 27 function loadFile(file)
26 { 28 {
27 let key = fileToKey(file); 29 return new Promise((resolve, reject) =>
28
29 ext.storage.get([key], function(items)
30 { 30 {
31 let entry = items[key]; 31 let key = fileToKey(file);
32 32 ext.storage.get([key], items =>
33 if (entry) 33 {
34 successCallback(entry); 34 let entry = items[key];
35 else 35 if (!entry)
36 errorCallback(new Error("File doesn't exist")); 36 {
37 // Check in localStorage
38 try
39 {
40 entry = JSON.parse(window.localStorage.getItem(key));
41 }
42 catch(err) {}
43 }
44 if (entry)
45 resolve(entry);
46 else
47 reject(new Error("File doesn't exist"));
48 });
37 }); 49 });
38 } 50 }
39 51
40 function saveFile(file, data, callback)
41 {
42 ext.storage.set(
43 fileToKey(file),
44 {
45 content: data,
46 lastModified: Date.now()
47 },
48 callback
49 );
50 }
51
52 exports.IO = 52 exports.IO =
53 { 53 {
54 resolveFilePath: function(path) 54 resolveFilePath: function(path)
55 { 55 {
56 return new FakeFile(path); 56 return new FakeFile(path);
57 }, 57 },
58 58
59 readFromFile: function(file, listener, callback) 59 readFromFile: function(file, listener, callback)
60 { 60 {
61 function onLoaded(entry) 61 function onLoaded(entry)
62 { 62 {
63 for (let line of entry.content) 63 if ("content" in entry)
64 listener.process(line); 64 {
65 65 if (entry["compressed"])
66 listener.process(null); 66 entry.content = JSON.parse(LZString.decompressFromUTF16(entry.content) );
67 for (let line of entry.content)
68 listener.process(line);
69 }
67 callback(null); 70 callback(null);
68 } 71 }
69 72
70 loadFile(file, onLoaded, callback); 73 loadFile(file).then(onLoaded, callback);
71 }, 74 },
72 75
73 writeToFile: function(file, data, callback) 76 writeToFile: function(file, data, callback)
74 { 77 {
75 saveFile(file, data, callback); 78 let entry = {};
76 }, 79 let key = fileToKey(file);
77 80
78 copyFile: function(fromFile, toFile, callback) 81 if (typeof browser == "undefined")
79 {
80 function onLoaded(entry)
81 { 82 {
82 saveFile(toFile, entry.content, callback); 83 entry[key] = {lastModified: Date.now(), content: data};
84 ext.storage.set(entry, callback);
83 } 85 }
84 86 else
85 loadFile(fromFile, onLoaded, callback);
86 },
87
88 renameFile: function(fromFile, newName, callback)
89 {
90 function onLoaded()
91 { 87 {
92 ext.storage.remove(fileToKey(fromFile), function() 88 // Edge cannot write files larger than 1Mb (500k string in UTF-16) via
93 { 89 // storage API. However it does not always raise an exception when trying
94 ext.storage.set(keyPrefix + newName, entry, callback); 90 // to do so. The solution is to compress and fallback to localStorage.
95 }); 91 let processedData = LZString.compressToUTF16(JSON.stringify(data));
92 ext.storage.remove(key);
93 entry[key] = {lastModified: Date.now(), content: processedData,
94 compressed: true};
95 window.localStorage.setItem(key, JSON.stringify(entry[key]));
96 callback();
96 } 97 }
97
98 loadFile(fromFile, onLoaded, callback);
99 },
100
101 removeFile: function(file, callback)
102 {
103 ext.storage.remove(fileToKey(file), callback);
104 }, 98 },
105 99
106 statFile: function(file, callback) 100 statFile: function(file, callback)
107 { 101 {
108 function onLoaded(entry) 102 function onLoaded(entry)
109 { 103 {
110 callback(null, { 104 callback(null, {
111 exists: true, 105 exists: true,
112 lastModified: entry.lastModified 106 lastModified: entry.lastModified
113 }); 107 });
114 } 108 }
115 109
116 loadFile(file, onLoaded, callback); 110 loadFile(file).then(onLoaded, callback);
117 } 111 }
118 }; 112 };
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