1 /*
2 * Copyright (C) 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "config.h"
30 #include "JSHistoryCustom.h"
31
32 #include "Frame.h"
33 #include "History.h"
34 #include <runtime/PrototypeFunction.h>
35
36 using namespace JSC;
37
38 namespace WebCore {
39
nonCachingStaticBackFunctionGetter(ExecState * exec,const Identifier & propertyName,const PropertySlot &)40 static JSValue nonCachingStaticBackFunctionGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot&)
41 {
42 return new (exec) NativeFunctionWrapper(exec, exec->lexicalGlobalObject()->prototypeFunctionStructure(), 0, propertyName, jsHistoryPrototypeFunctionBack);
43 }
44
nonCachingStaticForwardFunctionGetter(ExecState * exec,const Identifier & propertyName,const PropertySlot &)45 static JSValue nonCachingStaticForwardFunctionGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot&)
46 {
47 return new (exec) NativeFunctionWrapper(exec, exec->lexicalGlobalObject()->prototypeFunctionStructure(), 0, propertyName, jsHistoryPrototypeFunctionForward);
48 }
49
nonCachingStaticGoFunctionGetter(ExecState * exec,const Identifier & propertyName,const PropertySlot &)50 static JSValue nonCachingStaticGoFunctionGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot&)
51 {
52 return new (exec) NativeFunctionWrapper(exec, exec->lexicalGlobalObject()->prototypeFunctionStructure(), 1, propertyName, jsHistoryPrototypeFunctionGo);
53 }
54
getOwnPropertySlotDelegate(ExecState * exec,const Identifier & propertyName,PropertySlot & slot)55 bool JSHistory::getOwnPropertySlotDelegate(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
56 {
57 // When accessing History cross-domain, functions are always the native built-in ones.
58 // See JSDOMWindow::getOwnPropertySlotDelegate for additional details.
59
60 // Our custom code is only needed to implement the Window cross-domain scheme, so if access is
61 // allowed, return false so the normal lookup will take place.
62 String message;
63 if (allowsAccessFromFrame(exec, impl()->frame(), message))
64 return false;
65
66 // Check for the few functions that we allow, even when called cross-domain.
67 const HashEntry* entry = JSHistoryPrototype::s_info.propHashTable(exec)->entry(exec, propertyName);
68 if (entry) {
69 // Allow access to back(), forward() and go() from any frame.
70 if (entry->attributes() & Function) {
71 if (entry->function() == jsHistoryPrototypeFunctionBack) {
72 slot.setCustom(this, nonCachingStaticBackFunctionGetter);
73 return true;
74 } else if (entry->function() == jsHistoryPrototypeFunctionForward) {
75 slot.setCustom(this, nonCachingStaticForwardFunctionGetter);
76 return true;
77 } else if (entry->function() == jsHistoryPrototypeFunctionGo) {
78 slot.setCustom(this, nonCachingStaticGoFunctionGetter);
79 return true;
80 }
81 }
82 } else {
83 // Allow access to toString() cross-domain, but always Object.toString.
84 if (propertyName == exec->propertyNames().toString) {
85 slot.setCustom(this, objectToStringFunctionGetter);
86 return true;
87 }
88 }
89
90 printErrorMessageForFrame(impl()->frame(), message);
91 slot.setUndefined();
92 return true;
93 }
94
putDelegate(ExecState * exec,const Identifier &,JSValue,PutPropertySlot &)95 bool JSHistory::putDelegate(ExecState* exec, const Identifier&, JSValue, PutPropertySlot&)
96 {
97 // Only allow putting by frames in the same origin.
98 if (!allowsAccessFromFrame(exec, impl()->frame()))
99 return true;
100 return false;
101 }
102
deleteProperty(ExecState * exec,const Identifier & propertyName)103 bool JSHistory::deleteProperty(ExecState* exec, const Identifier& propertyName)
104 {
105 // Only allow deleting by frames in the same origin.
106 if (!allowsAccessFromFrame(exec, impl()->frame()))
107 return false;
108 return Base::deleteProperty(exec, propertyName);
109 }
110
getPropertyNames(ExecState * exec,PropertyNameArray & propertyNames)111 void JSHistory::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames)
112 {
113 // Only allow the history object to enumerated by frames in the same origin.
114 if (!allowsAccessFromFrame(exec, impl()->frame()))
115 return;
116 Base::getPropertyNames(exec, propertyNames);
117 }
118
119 } // namespace WebCore
120