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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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