private void ParseStatusLine(HttpResponseMessage response, Span <byte> line)
{
const int MinStatusLineLength = 12; // "HTTP/1.x 123"
if (line.Length < MinStatusLineLength || line[8] != ' ')
{
throw new HttpRequestException("Invalid response");
}
ulong first8Bytes = BinaryPrimitives.ReadUInt64LittleEndian(line);
if (first8Bytes != s_http10Bytes)
{
throw new HttpRequestException("Invalid response");
}
response.Version = HttpVersion.Version10;
// Set the status code
byte status1 = line[9], status2 = line[10], status3 = line[11];
if (!HttpParser.IsDigit(status1) || !HttpParser.IsDigit(status2) || !HttpParser.IsDigit(status3))
{
throw new HttpRequestException("Invalid response");
}
response.StatusCode = (HttpStatusCode)(100 * (status1 - '0') + 10 * (status2 - '0') + (status3 - '0'));
// Parse (optional) reason phrase
if (line.Length == MinStatusLineLength)
{
response.ReasonPhrase = string.Empty;
}
else if (line[MinStatusLineLength] == ' ')
{
Span <byte> reasonBytes = line.Slice(MinStatusLineLength + 1);
try
{
response.ReasonPhrase = HttpParser.GetAsciiString(reasonBytes);
}
catch (FormatException error)
{
throw new HttpRequestException("Invalid response", error);
}
}
else
{
throw new HttpRequestException("Invalid response");
}
}
