1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Google Safe Browsing.
*
* The Initial Developer of the Original Code is Google Inc.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Tony Chang <tony@google.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/**
* This class helps us batch a series of async calls to the db.
* If any of the tokens is in the database, we fire callback with
* true as a param. If all the tokens are not in the database,
* we fire callback with false as a param.
* This is an "Abstract" base class. Subclasses need to supply
* the condition_ method.
*
* @param tokens Array of strings to lookup in the db
* @param tableName String name of the table
* @param callback Function callback function that takes true if the condition
* passes.
*/
function MultiQuerier(tokens, tableName, callback) {
this.tokens_ = tokens;
this.tableName_ = tableName;
this.callback_ = callback;
this.dbservice_ = Cc["@mozilla.org/url-classifier/dbservice;1"]
.getService(Ci.nsIUrlClassifierDBService);
// We put the current token in this variable.
this.key_ = null;
}
/**
* Run the remaining tokens against the db.
*/
MultiQuerier.prototype.run = function() {
if (this.tokens_.length == 0) {
this.callback_.handleEvent(false);
this.dbservice_ = null;
this.callback_ = null;
return;
}
this.key_ = this.tokens_.pop();
G_Debug(this, "Looking up " + this.key_ + " in " + this.tableName_);
this.dbservice_.exists(this.tableName_, this.key_,
BindToObject(this.result_, this));
}
/**
* Callback from the db. If the returned value passes the this.condition_
* test, go ahead and call the main callback.
*/
MultiQuerier.prototype.result_ = function(value) {
if (this.condition_(value)) {
this.callback_.handleEvent(true)
this.dbservice_ = null;
this.callback_ = null;
} else {
this.run();
}
}
// Subclasses must override this.
MultiQuerier.prototype.condition_ = function(value) {
throw "MultiQuerier is an abstract base class";
}
/**
* Concrete MultiQuerier that stops if the key exists in the db.
*/
function ExistsMultiQuerier(tokens, tableName, callback) {
MultiQuerier.call(this, tokens, tableName, callback);
this.debugZone = "existsMultiQuerier";
}
ExistsMultiQuerier.inherits(MultiQuerier);
ExistsMultiQuerier.prototype.condition_ = function(value) {
return value.length > 0;
}
/**
* Concrete MultiQuerier that looks up a key, decrypts it, then
* checks the the resulting regular expressions for a match.
* @param tokens Array of hosts
*/
function EnchashMultiQuerier(tokens, tableName, callback, url) {
MultiQuerier.call(this, tokens, tableName, callback);
this.url_ = url;
this.enchashDecrypter_ = new PROT_EnchashDecrypter();
this.debugZone = "enchashMultiQuerier";
}
EnchashMultiQuerier.inherits(MultiQuerier);
EnchashMultiQuerier.prototype.run = function() {
if (this.tokens_.length == 0) {
this.callback_.handleEvent(false);
this.dbservice_ = null;
this.callback_ = null;
return;
}
var host = this.tokens_.pop();
this.key_ = host;
var lookupKey = this.enchashDecrypter_.getLookupKey(host);
this.dbservice_.exists(this.tableName_, lookupKey,
BindToObject(this.result_, this));
}
EnchashMultiQuerier.prototype.condition_ = function(encryptedValue) {
if (encryptedValue.length > 0) {
// We have encrypted regular expressions for this host. Let's
// decrypt them and see if we have a match.
var decrypted = this.enchashDecrypter_.decryptData(encryptedValue,
this.key_);
var res = this.enchashDecrypter_.parseRegExps(decrypted);
for (var j = 0; j < res.length; j++) {
if (res[j].test(this.url_)) {
return true;
}
}
}
return false;
}
|
