private async Task <HttpResponseMessage> ReadResponseHeadAsync(ByteStreamReader reader, HttpRequestMessage request)
{
// initialize the response
var response = new HttpResponseMessage {
RequestMessage = request
};
// read the first line of the response
string line = await reader.ReadLineAsync().ConfigureAwait(false);
string[] pieces = line.Split(new[] { ' ' }, 3);
if (pieces[0] != "HTTP/1.1")
{
throw new HttpRequestException("The HTTP version the response is not supported.");
}
response.StatusCode = (HttpStatusCode)int.Parse(pieces[1]);
response.ReasonPhrase = pieces[2];
// read the headers
response.Content = new ByteArrayContent(new byte[0]);
while ((line = await reader.ReadLineAsync().ConfigureAwait(false)) != null && line != string.Empty)
{
pieces = line.Split(new[] { ":" }, 2, StringSplitOptions.None);
if (pieces[1].StartsWith(" "))
{
pieces[1] = pieces[1].Substring(1);
}
if (!response.Headers.TryAddWithoutValidation(pieces[0], pieces[1]))
{
if (!response.Content.Headers.TryAddWithoutValidation(pieces[0], pieces[1]))
{
throw new InvalidOperationException($"The header '{pieces[0]}' could not be added to the response message or to the response content.");
}
}
}
return(response);
}