internal LosWriter()
{
_charBuffer = (char[])_charBufferAllocator.GetBuffer();
_size = _charBuffer.Length;
_freePos = 0;
_recyclable = true;
}
/// <devdoc>
/// <para>Deserializes a LOS formatted object from a string.</para>
/// </devdoc>
public object Deserialize(string input)
{
#if NO_BASE64
char[] data = input.ToCharArray();
#else
byte[] dataBytes = Convert.FromBase64String(input);
int dataLength = -1;
if (EnableViewStateMac)
{
try {
dataBytes = MachineKeySection.GetDecodedData(dataBytes, _macKey, 0, dataBytes.Length, ref dataLength);
}
catch (Exception e) {
PerfCounters.IncrementCounter(AppPerfCounter.VIEWSTATE_MAC_FAIL);
ViewStateException.ThrowMacValidationError(e, input);
}
}
if (dataLength == -1)
{
dataLength = dataBytes.Length;
}
char[] data = EncodingInstance.GetChars(dataBytes, 0, dataLength);
#endif
// clear or allocate name and type tables.
//
if (_deserializedTypeTable == null)
{
_deserializedTypeTable = new ArrayList();
_deserializedConverterTable = new ListDictionary();
}
else
{
_deserializedTypeTable.Clear();
_deserializedConverterTable.Clear();
}
_builder = (char[])_charBufferAllocator.GetBuffer();
_recyclable = true;
// DeserializeValueInternal is recursive, so we just kick this off
// starting at 0
_current = 0;
_deserializationData = data;
object ret = DeserializeValueInternal();
if (_recyclable)
{
_charBufferAllocator.ReuseBuffer(_builder);
}
return(ret);
}
/// <include file='doc\LOSFormatter.uex' path='docs/doc[@for="LosFormatter.Deserialize2"]/*' />
/// <devdoc>
/// <para>Deserializes a LOS formatted object from a string.</para>
/// </devdoc>
public object Deserialize(string input)
{
#if NO_BASE64
char[] data = input.ToCharArray();
#else
byte[] dataBytes = Convert.FromBase64String(input);
int dataLength = -1;
if (EnableViewStateMac)
{
try {
dataBytes = MachineKey.GetDecodedData(dataBytes, _macKey, 0, dataBytes.Length, ref dataLength);
}
catch {
throw new HttpException(HttpRuntime.FormatResourceString(SR.Invalid_Viewstate));
}
}
if (dataLength == -1)
{
dataLength = dataBytes.Length;
}
char[] data = EncodingInstance.GetChars(dataBytes, 0, dataLength);
#endif
// clear or allocate name and type tables.
//
if (_deserializedTypeTable == null)
{
_deserializedTypeTable = new ArrayList();
_deserializedConverterTable = new ListDictionary();
}
else
{
_deserializedTypeTable.Clear();
_deserializedConverterTable.Clear();
}
_builder = (char[])_charBufferAllocator.GetBuffer();
_recyclable = true;
// DeserializeValueInternal is recursive, so we just kick this off
// starting at 0
_current = 0;
_deserializationData = data;
object ret = DeserializeValueInternal();
if (_recyclable)
{
_charBufferAllocator.ReuseBuffer(_builder);
}
return(ret);
}
internal /*public*/ void CompleteTransforms(TextWriter output, bool enableMac, byte[] macKey)
{
int len = 0;
// convert to bytes
if (_recyclable)
{
// still using the original recyclable char buffer
// -- can use recyclable byte buffer
_byteBuffer = (byte[])_byteBufferAllocator.GetBuffer();
if (_freePos > 0)
{
len = Encoding.UTF8.GetBytes(_charBuffer, 0, _freePos, _byteBuffer, 0);
}
// do the mac encoding if requested
if (enableMac)
{
// the size of the output array depends on the key length and encryption type
// so we can't use the recyclable buffers after this
byte[] data = MachineKeySection.GetEncodedData(_byteBuffer, macKey, 0, ref len);
string serialized = Convert.ToBase64String(data, 0, len);
output.Write(serialized);
}
else
{
char[] base64chars = (char[])_charBufferAllocatorBase64.GetBuffer();
len = Convert.ToBase64CharArray(_byteBuffer, 0, len, base64chars, 0);
output.Write(base64chars, 0, len);
_charBufferAllocatorBase64.ReuseBuffer(base64chars);
}
}
else
{
_byteBuffer = Encoding.UTF8.GetBytes(_charBuffer, 0, _freePos);
len = _byteBuffer.Length;
if (enableMac)
{
_byteBuffer = MachineKeySection.GetEncodedData(_byteBuffer, macKey, 0, ref len);
}
string serialized = Convert.ToBase64String(_byteBuffer);
output.Write(serialized);
}
}
private char[] GetDecodedCharBuffer(Encoding encoding, ref int len)
{
if (this._charBuffer == null)
{
if (len == 0)
{
this._charBuffer = new char[0];
}
else if (this._recyclable)
{
this._charBuffer = (char[])s_CharBufferAllocator.GetBuffer();
len = encoding.GetChars(this._byteBuffer, this._offset, len, this._charBuffer, 0);
}
else
{
this._charBuffer = encoding.GetChars(this._byteBuffer, this._offset, len);
len = this._charBuffer.Length;
}
}
return(this._charBuffer);
}