internal static byte[] EncodeToBytes(string str, Encoding encoding)
{
if (encoding == null)
{
encoding = ContentHelper.GetDefaultEncoding();
}
return(encoding.GetBytes(str));
}
internal static string DecodeStream(MemoryStream stream, Encoding encoding)
{
if (encoding == null)
{
encoding = ContentHelper.GetDefaultEncoding();
}
byte[] bytes = stream.ToArray();
return(encoding.GetString(bytes));
}
internal static byte[] EncodeToBytes(string str, Encoding encoding)
{
if (encoding == null)
{
// just use the default encoding if one wasn't provided
encoding = ContentHelper.GetDefaultEncoding();
}
return(encoding.GetBytes(str));
}
internal static string DecodeStream(Stream stream, Encoding encoding)
{
if (null == encoding)
{
// just use the default encoding if one wasn't provided
encoding = ContentHelper.GetDefaultEncoding();
}
StringBuilder result = new StringBuilder(capacity: ChunkSize);
Decoder decoder = encoding.GetDecoder();
int useBufferSize = 64;
if (useBufferSize < encoding.GetMaxCharCount(10))
{
useBufferSize = encoding.GetMaxCharCount(10);
}
char[] chars = new char[useBufferSize];
byte[] bytes = new byte[useBufferSize * 4];
int bytesRead = 0;
do
{
// Read at most the number of bytes that will fit in the input buffer. The
// return value is the actual number of bytes read, or zero if no bytes remain.
bytesRead = stream.Read(bytes, 0, useBufferSize * 4);
bool completed = false;
int byteIndex = 0;
int bytesUsed;
int charsUsed;
while (!completed)
{
// If this is the last input data, flush the decoder's internal buffer and state.
bool flush = (bytesRead == 0);
decoder.Convert(bytes, byteIndex, bytesRead - byteIndex,
chars, 0, useBufferSize, flush,
out bytesUsed, out charsUsed, out completed);
// The conversion produced the number of characters indicated by charsUsed. Write that number
// of characters to our result buffer
result.Append(chars, 0, charsUsed);
// Increment byteIndex to the next block of bytes in the input buffer, if any, to convert.
byteIndex += bytesUsed;
}
}while (bytesRead != 0);
return(result.ToString());
}
internal static string DecodeStream(Stream stream, ref Encoding encoding)
{
bool isDefaultEncoding = false;
if (encoding == null)
{
// Use the default encoding if one wasn't provided
encoding = ContentHelper.GetDefaultEncoding();
isDefaultEncoding = true;
}
string content = StreamToString(stream, encoding);
if (isDefaultEncoding)
{
do
{
// check for a charset attribute on the meta element to override the default.
Match match = s_metaexp.Match(content);
if (match.Success)
{
Encoding localEncoding = null;
string characterSet = match.Groups["charset"].Value;
if (TryGetEncoding(characterSet, out localEncoding))
{
stream.Seek(0, SeekOrigin.Begin);
content = StreamToString(stream, localEncoding);
// report the encoding used.
encoding = localEncoding;
}
}
} while (false);
}
return(content);
}
