static bool decode(Decoder& decoder, FormDataElement& element)
{
uint32_t type;
if (!decoder.decodeUInt32(type))
return false;
switch (type) {
case FormDataElement::data: {
element.m_type = FormDataElement::data;
Vector<uint8_t> data;
if (!decoder.decodeBytes(data))
return false;
size_t size = data.size();
element.m_data.resize(size);
memcpy(element.m_data.data(), data.data(), size);
return true;
}
case FormDataElement::encodedFile: {
element.m_type = FormDataElement::encodedFile;
if (!decoder.decodeString(element.m_filename))
return false;
if (!decoder.decodeBool(element.m_shouldGenerateFile))
return false;
int64_t fileStart;
if (!decoder.decodeInt64(fileStart))
return false;
if (fileStart < 0)
return false;
int64_t fileLength;
if (!decoder.decodeInt64(fileLength))
return false;
if (fileLength < fileStart)
return false;
double expectedFileModificationTime;
if (!decoder.decodeDouble(expectedFileModificationTime))
return false;
#if ENABLE(BLOB)
element.m_fileStart = fileStart;
element.m_fileLength = fileLength;
element.m_expectedFileModificationTime = expectedFileModificationTime;
#endif
return true;
}
#if ENABLE(BLOB)
case FormDataElement::encodedBlob:
element.m_type = FormDataElement::encodedBlob;
String blobURLString;
if (!decoder.decodeString(blobURLString))
return false;
element.m_blobURL = KURL(KURL(), blobURLString);
return true;
#endif
}
return false;
}
PassRefPtr<FormData> FormData::decode(Decoder& decoder)
{
RefPtr<FormData> data = FormData::create();
if (!decoder.decodeBool(data->m_alwaysStream))
return 0;
Vector<uint8_t> boundary;
if (!decoder.decodeBytes(boundary))
return 0;
size_t size = boundary.size();
data->m_boundary.resize(size);
memcpy(data->m_boundary.data(), boundary.data(), size);
uint64_t elementsSize;
if (!decoder.decodeUInt64(elementsSize))
return 0;
for (size_t i = 0; i < elementsSize; ++i) {
FormDataElement element;
if (!decodeElement(decoder, element))
return 0;
data->m_elements.append(element);
}
bool dummy;
if (!decoder.decodeBool(dummy))
return 0;
if (!decoder.decodeInt64(data->m_identifier))
return 0;
return data.release();
}
static bool decodeElement(Decoder& decoder, FormDataElement& element)
{
uint32_t type;
if (!decoder.decodeUInt32(type))
return false;
switch (static_cast<FormDataElement::Type>(type)) {
case FormDataElement::Type::Data: {
element.m_type = FormDataElement::Type::Data;
Vector<uint8_t> data;
if (!decoder.decodeBytes(data))
return false;
size_t size = data.size();
element.m_data.resize(size);
memcpy(element.m_data.data(), data.data(), size);
return true;
}
case FormDataElement::Type::EncodedFile: {
element.m_type = static_cast<FormDataElement::Type>(type);
String filenameOrURL;
if (!decoder.decodeString(filenameOrURL))
return false;
if (static_cast<FormDataElement::Type>(type) == FormDataElement::Type::EncodedFile) {
if (!decoder.decodeString(element.m_generatedFilename))
return false;
if (!decoder.decodeBool(element.m_shouldGenerateFile))
return false;
}
int64_t fileStart;
if (!decoder.decodeInt64(fileStart))
return false;
if (fileStart < 0)
return false;
int64_t fileLength;
if (!decoder.decodeInt64(fileLength))
return false;
if (fileLength != BlobDataItem::toEndOfFile && fileLength < fileStart)
return false;
double expectedFileModificationTime;
if (!decoder.decodeDouble(expectedFileModificationTime))
return false;
element.m_filename = filenameOrURL;
element.m_fileStart = fileStart;
element.m_fileLength = fileLength;
element.m_expectedFileModificationTime = expectedFileModificationTime;
return true;
}
case FormDataElement::Type::EncodedBlob:
element.m_type = FormDataElement::Type::EncodedBlob;
String blobURLString;
if (!decoder.decodeString(blobURLString))
return false;
element.m_url = URL(URL(), blobURLString);
return true;
}
return false;
}
PassRefPtr<HistoryItem> HistoryItem::decodeBackForwardTree(const String& topURLString, const String& topTitle, const String& topOriginalURLString, Decoder& decoder)
{
// Since the data stream is not trusted, the decode has to be non-recursive.
// We don't want bad data to cause a stack overflow.
uint32_t version;
if (!decoder.decodeUInt32(version))
return 0;
if (version != backForwardTreeEncodingVersion)
return 0;
String urlString = topURLString;
String title = topTitle;
String originalURLString = topOriginalURLString;
Vector<DecodeRecursionStackElement, 16> recursionStack;
recurse:
RefPtr<HistoryItem> node = create(urlString, title, 0);
node->setOriginalURLString(originalURLString);
title = String();
uint64_t size;
if (!decoder.decodeUInt64(size))
return 0;
size_t i;
RefPtr<HistoryItem> child;
for (i = 0; i < size; ++i) {
if (!decoder.decodeString(originalURLString))
return 0;
if (!decoder.decodeString(urlString))
return 0;
recursionStack.append(DecodeRecursionStackElement(node.release(), i, size));
goto recurse;
resume:
node->m_children.append(child.release());
}
if (!decoder.decodeInt64(node->m_documentSequenceNumber))
return 0;
if (!decoder.decodeUInt64(size))
return 0;
for (i = 0; i < size; ++i) {
String state;
if (!decoder.decodeString(state))
return 0;
node->m_documentState.append(state);
}
if (!decoder.decodeString(node->m_formContentType))
return 0;
bool hasFormData;
if (!decoder.decodeBool(hasFormData))
return 0;
if (hasFormData) {
node->m_formData = FormData::decode(decoder);
if (!node->m_formData)
return 0;
}
if (!decoder.decodeInt64(node->m_itemSequenceNumber))
return 0;
if (!decoder.decodeString(node->m_referrer))
return 0;
int32_t x;
if (!decoder.decodeInt32(x))
return 0;
int32_t y;
if (!decoder.decodeInt32(y))
return 0;
node->m_scrollPoint = IntPoint(x, y);
if (!decoder.decodeFloat(node->m_pageScaleFactor))
return 0;
bool hasStateObject;
if (!decoder.decodeBool(hasStateObject))
return 0;
if (hasStateObject) {
Vector<uint8_t> bytes;
if (!decoder.decodeBytes(bytes))
return 0;
node->m_stateObject = SerializedScriptValue::adopt(bytes);
}
if (!decoder.decodeString(node->m_target))
return 0;
// Simulate recursion with our own stack.
if (!recursionStack.isEmpty()) {
DecodeRecursionStackElement& element = recursionStack.last();
child = node.release();
node = element.node.release();
i = element.i;
size = element.size;
recursionStack.removeLast();
goto resume;
}
return node.release();
}