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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/*
* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2006 James G. Speth (speth@end.com)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "ObjCPlugin.h"
#import <objc/objc-runtime.h>
#import <WebKit/WebKit.h>
// === NSObject category to expose almost everything to JavaScript ===
// Warning: this class introduces huge security weaknesses, and should only be used
// for testing inside of DumpRenderTree, and only with trusted code. By default, it has
// the same restrictive behavior as the standard WebKit setup. However, scripts can use the
// plugin's removeBridgeRestrictions: method to open up almost total access to the Cocoa
// frameworks.
static BOOL _allowsScriptsFullAccess = NO;
@interface NSObject (ObjCScriptAccess)
+ (void)setAllowsScriptsFullAccess:(BOOL)value;
+ (BOOL)allowsScriptsFullAccess;
@end
@implementation NSObject (ObjCScriptAccess)
+ (void)setAllowsScriptsFullAccess:(BOOL)value
{
_allowsScriptsFullAccess = value;
}
+ (BOOL)allowsScriptsFullAccess
{
return _allowsScriptsFullAccess;
}
+ (BOOL)isSelectorExcludedFromWebScript:(SEL)selector
{
return !_allowsScriptsFullAccess;
}
+ (NSString *)webScriptNameForSelector:(SEL)selector
{
return nil;
}
@end
@interface JSObjC : NSObject {
}
// expose some useful objc functions to the scripting environment
- (id)lookUpClass:(NSString *)name;
- (void)log:(NSString *)message;
- (id)retainObject:(id)obj;
- (id)classOfObject:(id)obj;
- (NSString *)classNameOfObject:(id)obj;
@end
@implementation JSObjC
+ (BOOL)isSelectorExcludedFromWebScript:(SEL)selector
{
return NO;
}
+ (NSString *)webScriptNameForSelector:(SEL)selector
{
return nil;
}
- (id)invokeDefaultMethodWithArguments:(NSArray *)args
{
// this is a useful shortcut for accessing objective-c classes from the scripting
// environment, e.g. 'var myObject = objc("NSObject").alloc().init();'
if ([args count] == 1)
return [self lookUpClass:[args objectAtIndex:0]];
return nil;
}
- (id)lookUpClass:(NSString *)name
{
return NSClassFromString(name);
}
- (void)log:(NSString *)message
{
NSLog(@"%@", message);
}
- (id)retainObject:(id)obj
{
return [obj retain];
}
- (id)classOfObject:(id)obj
{
return (id)[obj class];
}
- (NSString *)classNameOfObject:(id)obj
{
return [obj className];
}
@end
@implementation ObjCPlugin
+ (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector
{
if (aSelector == @selector(removeBridgeRestrictions:))
return NO;
if (aSelector == @selector(echo:))
return NO;
if (aSelector == @selector(throwIfArgumentIsNotHello:))
return NO;
return YES;
}
+ (NSString *)webScriptNameForSelector:(SEL)aSelector
{
if (aSelector == @selector(echo:))
return @"echo";
if (aSelector == @selector(throwIfArgumentIsNotHello:))
return @"throwIfArgumentIsNotHello";
return nil;
}
+ (NSString *)webScriptNameForKey:(const char *)key
{
if (strcmp(key, "throwOnDealloc") == 0)
return @"throwOnDealloc";
return nil;
}
+ (BOOL)isKeyExcludedFromWebScript:(const char *)key
{
if (strcmp(key, "throwOnDealloc") == 0)
return NO;
return YES;
}
- (void)removeBridgeRestrictions:(id)container
{
// let scripts invoke any selector
[NSObject setAllowsScriptsFullAccess:YES];
// store a JSObjC instance into the provided container
JSObjC *objc = [[JSObjC alloc] init];
[container setValue:objc forKey:@"objc"];
[objc release];
}
- (id)echo:(id)obj
{
return obj;
}
- (void)throwIfArgumentIsNotHello:(NSString *)str
{
if (![str isEqualToString:@"Hello"])
[WebScriptObject throwException:[NSString stringWithFormat:@"%@ != Hello", str]];
}
- (void)dealloc
{
if (throwOnDealloc)
[WebScriptObject throwException:@"Throwing exception on dealloc of ObjCPlugin"];
[super dealloc];
}
@end
|
