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1 /* | 1 /* |
2 * Copyright (C) 2009, 2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2009, 2010 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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48 class DOMArrayBuffer; | 48 class DOMArrayBuffer; |
49 class ExceptionState; | 49 class ExceptionState; |
50 class MessagePort; | 50 class MessagePort; |
51 class WebBlobInfo; | 51 class WebBlobInfo; |
52 | 52 |
53 typedef WillBeHeapVector<RefPtrWillBeMember<MessagePort>, 1> MessagePortArray; | 53 typedef WillBeHeapVector<RefPtrWillBeMember<MessagePort>, 1> MessagePortArray; |
54 typedef Vector<RefPtr<DOMArrayBuffer>, 1> ArrayBufferArray; | 54 typedef Vector<RefPtr<DOMArrayBuffer>, 1> ArrayBufferArray; |
55 typedef HashMap<String, RefPtr<BlobDataHandle> > BlobDataHandleMap; | 55 typedef HashMap<String, RefPtr<BlobDataHandle> > BlobDataHandleMap; |
56 typedef Vector<blink::WebBlobInfo> WebBlobInfoArray; | 56 typedef Vector<blink::WebBlobInfo> WebBlobInfoArray; |
57 | 57 |
58 class SerializedScriptValue final : public ThreadSafeRefCounted<SerializedScript
Value> { | 58 class SerializedScriptValue : public ThreadSafeRefCounted<SerializedScriptValue>
{ |
59 public: | 59 public: |
60 // Increment this for each incompatible change to the wire format. | 60 // Increment this for each incompatible change to the wire format. |
61 // Version 2: Added StringUCharTag for UChar v8 strings. | 61 // Version 2: Added StringUCharTag for UChar v8 strings. |
62 // Version 3: Switched to using uuids as blob data identifiers. | 62 // Version 3: Switched to using uuids as blob data identifiers. |
63 // Version 4: Extended File serialization to be complete. | 63 // Version 4: Extended File serialization to be complete. |
64 // Version 5: Added CryptoKeyTag for Key objects. | 64 // Version 5: Added CryptoKeyTag for Key objects. |
65 // Version 6: Added indexed serialization for File, Blob, and FileList. | 65 // Version 6: Added indexed serialization for File, Blob, and FileList. |
66 // Version 7: Extended File serialization with user visibility. | 66 // Version 7: Extended File serialization with user visibility. |
67 static const uint32_t wireFormatVersion = 7; | 67 static const uint32_t wireFormatVersion = 7; |
68 | 68 |
69 ~SerializedScriptValue(); | |
70 | |
71 // VarInt encoding constants. | 69 // VarInt encoding constants. |
72 static const int varIntShift = 7; | 70 static const int varIntShift = 7; |
73 static const int varIntMask = (1 << varIntShift) - 1; | 71 static const int varIntMask = (1 << varIntShift) - 1; |
74 | 72 |
75 // If a serialization error occurs (e.g., cyclic input value) this | 73 virtual ~SerializedScriptValue(); |
76 // function returns an empty representation, schedules a V8 exception to | |
77 // be thrown using v8::ThrowException(), and sets |didThrow|. In this case | |
78 // the caller must not invoke any V8 operations until control returns to | |
79 // V8. When serialization is successful, |didThrow| is false. | |
80 static PassRefPtr<SerializedScriptValue> create(v8::Handle<v8::Value>, Messa
gePortArray*, ArrayBufferArray*, ExceptionState&, v8::Isolate*); | |
81 static PassRefPtr<SerializedScriptValue> createFromWire(const String&); | |
82 static PassRefPtr<SerializedScriptValue> createFromWireBytes(const Vector<ui
nt8_t>&); | |
83 static PassRefPtr<SerializedScriptValue> create(const String&); | |
84 static PassRefPtr<SerializedScriptValue> create(const String&, v8::Isolate*)
; | |
85 static PassRefPtr<SerializedScriptValue> create(); | |
86 static PassRefPtr<SerializedScriptValue> create(const ScriptValue&, WebBlobI
nfoArray*, ExceptionState&, v8::Isolate*); | |
87 | |
88 // Never throws exceptions. | |
89 static PassRefPtr<SerializedScriptValue> createAndSwallowExceptions(v8::Isol
ate*, v8::Handle<v8::Value>); | |
90 | 74 |
91 static PassRefPtr<SerializedScriptValue> nullValue(); | 75 static PassRefPtr<SerializedScriptValue> nullValue(); |
92 | 76 |
93 String toWireString() const { return m_data; } | 77 String toWireString() const { return m_data; } |
94 void toWireBytes(Vector<char>&) const; | 78 void toWireBytes(Vector<char>&) const; |
95 | 79 |
96 // Deserializes the value (in the current context). Returns a null value in | 80 // Deserializes the value (in the current context). Returns a null value in |
97 // case of failure. | 81 // case of failure. |
98 v8::Handle<v8::Value> deserialize(MessagePortArray* = 0); | 82 v8::Handle<v8::Value> deserialize(MessagePortArray* = 0); |
99 v8::Handle<v8::Value> deserialize(v8::Isolate*, MessagePortArray* = 0, const
WebBlobInfoArray* = 0); | 83 v8::Handle<v8::Value> deserialize(v8::Isolate*, MessagePortArray* = 0, const
WebBlobInfoArray* = 0); |
100 | 84 |
101 // Helper function which pulls the values out of a JS sequence and into a Me
ssagePortArray. | 85 // Helper function which pulls the values out of a JS sequence and into a Me
ssagePortArray. |
102 // Also validates the elements per sections 4.1.13 and 4.1.15 of the WebIDL
spec and section 8.3.3 | 86 // Also validates the elements per sections 4.1.13 and 4.1.15 of the WebIDL
spec and section 8.3.3 |
103 // of the HTML5 spec and generates exceptions as appropriate. | 87 // of the HTML5 spec and generates exceptions as appropriate. |
104 // Returns true if the array was filled, or false if the passed value was no
t of an appropriate type. | 88 // Returns true if the array was filled, or false if the passed value was no
t of an appropriate type. |
105 static bool extractTransferables(v8::Isolate*, v8::Local<v8::Value>, int, Me
ssagePortArray&, ArrayBufferArray&, ExceptionState&); | 89 static bool extractTransferables(v8::Isolate*, v8::Local<v8::Value>, int, Me
ssagePortArray&, ArrayBufferArray&, ExceptionState&); |
106 | 90 |
107 // Informs the V8 about external memory allocated and owned by this object.
Large values should contribute | 91 // Informs the V8 about external memory allocated and owned by this object.
Large values should contribute |
108 // to GC counters to eventually trigger a GC, otherwise flood of postMessage
() can cause OOM. | 92 // to GC counters to eventually trigger a GC, otherwise flood of postMessage
() can cause OOM. |
109 // Ok to invoke multiple times (only adds memory once). | 93 // Ok to invoke multiple times (only adds memory once). |
110 // The memory registration is revoked automatically in destructor. | 94 // The memory registration is revoked automatically in destructor. |
111 void registerMemoryAllocatedWithCurrentScriptContext(); | 95 void registerMemoryAllocatedWithCurrentScriptContext(); |
112 | 96 |
113 private: | 97 private: |
| 98 // The followings are private, but used by SerializedScriptValueFactory. |
114 enum StringDataMode { | 99 enum StringDataMode { |
115 StringValue, | 100 StringValue, |
116 WireData | 101 WireData |
117 }; | 102 }; |
118 typedef Vector<WTF::ArrayBufferContents, 1> ArrayBufferContentsArray; | 103 typedef Vector<WTF::ArrayBufferContents, 1> ArrayBufferContentsArray; |
119 | 104 |
120 SerializedScriptValue(); | 105 SerializedScriptValue(); |
121 SerializedScriptValue(v8::Handle<v8::Value>, MessagePortArray*, ArrayBufferA
rray*, WebBlobInfoArray*, ExceptionState&, v8::Isolate*); | |
122 explicit SerializedScriptValue(const String& wireData); | 106 explicit SerializedScriptValue(const String& wireData); |
123 | 107 |
124 static PassOwnPtr<ArrayBufferContentsArray> transferArrayBuffers(v8::Isolate
*, ArrayBufferArray&, ExceptionState&); | 108 BlobDataHandleMap& blobDataHandles() { return m_blobDataHandles; } |
| 109 String& data() { return m_data; } |
| 110 void setData(const String& data) { m_data = data; } |
| 111 void transferArrayBuffers(v8::Isolate*, ArrayBufferArray&, ExceptionState&); |
| 112 ArrayBufferContentsArray* arrayBufferContentsArray() { return m_arrayBufferC
ontentsArray.get(); } |
125 | 113 |
| 114 static PassOwnPtr<ArrayBufferContentsArray> createArrayBuffers(v8::Isolate*,
ArrayBufferArray&, ExceptionState&); |
| 115 |
| 116 private: |
126 String m_data; | 117 String m_data; |
127 OwnPtr<ArrayBufferContentsArray> m_arrayBufferContentsArray; | 118 OwnPtr<ArrayBufferContentsArray> m_arrayBufferContentsArray; |
128 BlobDataHandleMap m_blobDataHandles; | 119 BlobDataHandleMap m_blobDataHandles; |
129 intptr_t m_externallyAllocatedMemory; | 120 intptr_t m_externallyAllocatedMemory; |
| 121 |
| 122 friend class SerializedScriptValueFactory; |
130 }; | 123 }; |
131 | 124 |
132 } // namespace blink | 125 } // namespace blink |
133 | 126 |
134 #endif // SerializedScriptValue_h | 127 #endif // SerializedScriptValue_h |
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