async Task SetResponseStatusLine(HttpResponseMessage httpResponse, HttpBufferedStream bufferedStream, CancellationToken cancellationToken)
{
string statusLine = await bufferedStream.ReadLineAsync(cancellationToken);
if (string.IsNullOrWhiteSpace(statusLine))
{
throw new HttpRequestException("Response is empty.");
}
string[] statusLineParts = statusLine.Split(new[] { SP }, 3);
if (statusLineParts.Length < 3)
{
throw new HttpRequestException("Status line is not valid.");
}
string[] httpVersion = statusLineParts[0].Split(new[] { ProtocolVersionSeparator }, 2);
if (httpVersion.Length < 2 || !Version.TryParse(httpVersion[1], out Version versionNumber))
{
throw new HttpRequestException($"Version is not valid {statusLineParts[0]}.");
}
httpResponse.Version = versionNumber;
if (!Enum.TryParse(statusLineParts[1], out HttpStatusCode statusCode))
{
throw new HttpRequestException($"StatusCode is not valid {statusLineParts[1]}.");
}
httpResponse.StatusCode = statusCode;
httpResponse.ReasonPhrase = statusLineParts[2];
}
public async Task <HttpResponseMessage> DeserializeResponse(HttpBufferedStream bufferedStream, CancellationToken cancellationToken)
{
var httpResponse = new HttpResponseMessage();
await this.SetResponseStatusLine(httpResponse, bufferedStream, cancellationToken);
await this.SetHeadersAndContent(httpResponse, bufferedStream, cancellationToken);
return(httpResponse);
}
async Task SetHeadersAndContent(HttpResponseMessage httpResponse, HttpBufferedStream bufferedStream, CancellationToken cancellationToken)
{
IList <string> headers = new List <string>();
string line = await bufferedStream.ReadLineAsync(cancellationToken);
while (!string.IsNullOrWhiteSpace(line))
{
headers.Add(line);
line = await bufferedStream.ReadLineAsync(cancellationToken);
}
httpResponse.Content = new StreamContent(bufferedStream);
foreach (string header in headers)
{
if (string.IsNullOrWhiteSpace(header))
{
// headers end
break;
}
int headerSeparatorPosition = header.IndexOf(HeaderSeparator);
if (headerSeparatorPosition <= 0)
{
throw new HttpRequestException($"Header is invalid {header}.");
}
string headerName = header.Substring(0, headerSeparatorPosition).Trim();
string headerValue = header.Substring(headerSeparatorPosition + 1).Trim();
bool headerAdded = httpResponse.Headers.TryAddWithoutValidation(headerName, headerValue);
if (!headerAdded)
{
if (string.Equals(headerName, ContentLengthHeaderName, StringComparison.InvariantCultureIgnoreCase))
{
if (!long.TryParse(headerValue, out long contentLength))
{
throw new HttpRequestException($"Header value is invalid for {headerName}.");
}
await httpResponse.Content.LoadIntoBufferAsync(contentLength);
}
httpResponse.Content.Headers.TryAddWithoutValidation(headerName, headerValue);
}
}
}
protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
Socket socket = await this.GetConnectedSocketAsync();
var stream = new HttpBufferedStream(new NetworkStream(socket, true));
var serializer = new HttpRequestResponseSerializer();
byte[] requestBytes = serializer.SerializeRequest(request);
Events.SendRequest(request.RequestUri);
await stream.WriteAsync(requestBytes, 0, requestBytes.Length, cancellationToken);
if (request.Content != null)
{
await request.Content.CopyToAsync(stream);
}
HttpResponseMessage response = await serializer.DeserializeResponse(stream, cancellationToken);
Events.ResponseReceived(response.StatusCode);
return(response);
}
