public async Task <bool> FillBufferAsync(CancellationToken cancellationToken = default)
{
await FlushAsync(cancellationToken);
return(await reader.FillBufferAsync(cancellationToken));
}
/// <summary>
/// Fills the buffer asynchronous.
/// </summary>
/// <returns></returns>
Task <bool> ICustomStreamReader.FillBufferAsync(CancellationToken cancellationToken)
{
return(baseStream.FillBufferAsync(cancellationToken));
}
/// <summary>
/// Read a line from the byte stream
/// </summary>
/// <returns></returns>
private async Task <long> readUntilBoundaryAsync(ICustomStreamReader reader, long totalBytesToRead, string boundary, CancellationToken cancellationToken)
{
int bufferDataLength = 0;
var buffer = bufferPool.GetBuffer(bufferSize);
try
{
int boundaryLength = boundary.Length + 4;
long bytesRead = 0;
while (bytesRead < totalBytesToRead && (reader.DataAvailable || await reader.FillBufferAsync(cancellationToken)))
{
byte newChar = reader.ReadByteFromBuffer();
buffer[bufferDataLength] = newChar;
bufferDataLength++;
bytesRead++;
if (bufferDataLength >= boundaryLength)
{
int startIdx = bufferDataLength - boundaryLength;
if (buffer[startIdx] == '-' && buffer[startIdx + 1] == '-')
{
startIdx += 2;
bool ok = true;
for (int i = 0; i < boundary.Length; i++)
{
if (buffer[startIdx + i] != boundary[i])
{
ok = false;
break;
}
}
if (ok)
{
break;
}
}
}
if (bufferDataLength == buffer.Length)
{
// boundary is not longer than 70 bytes according to the specification, so keeping the last 100 (minimum 74) bytes is enough
const int bytesToKeep = 100;
Buffer.BlockCopy(buffer, buffer.Length - bytesToKeep, buffer, 0, bytesToKeep);
bufferDataLength = bytesToKeep;
}
}
return(bytesRead);
}
finally
{
bufferPool.ReturnBuffer(buffer);
}
}
