Exemple #1
0
    /// <summary>
    /// Reads the next <see cref="MultipartSection"/>.
    /// </summary>
    /// <param name="cancellationToken">The token to monitor for cancellation requests.
    /// The default value is <see cref="CancellationToken.None"/>.</param>
    /// <returns></returns>
    public async Task <MultipartSection?> ReadNextSectionAsync(CancellationToken cancellationToken = new CancellationToken())
    {
        // Drain the prior section.
        await _currentStream.DrainAsync(cancellationToken);

        // If we're at the end return null
        if (_currentStream.FinalBoundaryFound)
        {
            // There may be trailer data after the last boundary.
            await _stream.DrainAsync(HeadersLengthLimit, cancellationToken);

            return(null);
        }
        var headers = await ReadHeadersAsync(cancellationToken);

        _boundary.ExpectLeadingCrlf = true;
        _currentStream = new MultipartReaderStream(_stream, _boundary)
        {
            LengthLimit = BodyLengthLimit
        };
        long?baseStreamOffset = _stream.CanSeek ? (long?)_stream.Position : null;

        return(new MultipartSection()
        {
            Headers = headers, Body = _currentStream, BaseStreamOffset = baseStreamOffset
        });
    }