public async Task<HttpResponseMessage> GetResponse(SocksHttpManagerParameters parameters)
{
return await HandleRedirects(parameters, async uri =>
{
switch (parameters.ProxyType)
{
case SocksProxyTypes.CannotVerify:
case SocksProxyTypes.ChangesContent:
case SocksProxyTypes.Unchecked:
try
{
return await ReadHttpResponseMessage(parameters, uri, async (stream, remoteEP, cancellationToken) =>
{
await new SocksRequest().V4(stream, remoteEP, cancellationToken);
Application.SocksProxyHashTable.Add(GetProxyUri(parameters, uri).ToString(), SocksProxyTypes.Socks4);
});
}
catch (SocksRequestFailedException)
{
}
return await ReadHttpResponseMessage(parameters, uri, async (stream, remoteEP, cancellationToken) =>
{
await new SocksRequest().V5(stream, remoteEP, cancellationToken);
Application.SocksProxyHashTable.Add(GetProxyUri(parameters, uri).ToString(), SocksProxyTypes.Socks5);
});
case SocksProxyTypes.Socks4:
return await ReadHttpResponseMessage(parameters, uri, new SocksRequest().V4);
case SocksProxyTypes.Socks5:
return await ReadHttpResponseMessage(parameters, uri, new SocksRequest().V5);
default:
throw new InvalidOperationException(string.Format("Value '{0}' is not expected at SocksHttpManager.GetResponse", parameters.ProxyType));
}
});
}
private async Task <HttpResponseMessage> ReadHttpResponseMessage(SocksHttpManagerParameters parameters, Uri uri, Func <NetworkStream, Uri, CancellationToken, Task> sendRequest)
{
using (TcpClientExtended tcpClient = new TcpClientExtended())
{
Uri proxyUri = GetProxyUri(parameters, uri);
await tcpClient.ConnectAsync(proxyUri.Host, proxyUri.Port, parameters.CancellationToken);
await sendRequest(tcpClient.GetStream(), uri, parameters.CancellationToken);
StringBuilder responseBuilder = new StringBuilder();
byte[] requestBytes = Encoding.UTF8.GetBytes(BuildHttpRequestMessage(parameters.Request));
await tcpClient.GetStream().WriteAsync(requestBytes, 0, requestBytes.Length, parameters.CancellationToken);
FireEventProgress(parameters.ReportRequestProgress, requestBytes.Length, requestBytes.Length);
long?total = null;
var buffer = new byte[1024];
var bytesReceived = await tcpClient.GetStream().ReadAsync(buffer, 0, buffer.Length, parameters.CancellationToken);
while (bytesReceived > 0)
{
responseBuilder.Append(Encoding.UTF8.GetString(buffer, 0, bytesReceived));
if (parameters.ReportResponseProgress != null && !total.HasValue)
{
total = GetContentLength(responseBuilder.ToString());
}
if (total.HasValue)
{
FireEventProgress(parameters.ReportResponseProgress, responseBuilder.Length, total);
}
bytesReceived = await tcpClient.GetStream().ReadAsync(buffer, 0, buffer.Length, parameters.CancellationToken);
}
HttpResponseMessage result = BuildHttpResponseMessage(responseBuilder.ToString());
FireEventProgress(parameters.ReportResponseProgress, responseBuilder.Length, responseBuilder.Length);
return(result);
}
}
private async Task<HttpResponseMessage> ReadHttpResponseMessage(SocksHttpManagerParameters parameters, Uri uri, Func<NetworkStream, Uri, CancellationToken, Task> sendRequest)
{
using (TcpClientExtended tcpClient = new TcpClientExtended())
{
Uri proxyUri = GetProxyUri(parameters, uri);
await tcpClient.ConnectAsync(proxyUri.Host, proxyUri.Port, parameters.CancellationToken);
await sendRequest(tcpClient.GetStream(), uri, parameters.CancellationToken);
StringBuilder responseBuilder = new StringBuilder();
byte[] requestBytes = Encoding.UTF8.GetBytes(BuildHttpRequestMessage(parameters.Request));
await tcpClient.GetStream().WriteAsync(requestBytes, 0, requestBytes.Length, parameters.CancellationToken);
FireEventProgress(parameters.ReportRequestProgress, requestBytes.Length, requestBytes.Length);
long? total = null;
var buffer = new byte[1024];
var bytesReceived = await tcpClient.GetStream().ReadAsync(buffer, 0, buffer.Length, parameters.CancellationToken);
while (bytesReceived > 0)
{
responseBuilder.Append(Encoding.UTF8.GetString(buffer, 0, bytesReceived));
if (parameters.ReportResponseProgress != null && !total.HasValue)
{
total = GetContentLength(responseBuilder.ToString());
}
if (total.HasValue)
{
FireEventProgress(parameters.ReportResponseProgress, responseBuilder.Length, total);
}
bytesReceived = await tcpClient.GetStream().ReadAsync(buffer, 0, buffer.Length, parameters.CancellationToken);
}
HttpResponseMessage result = BuildHttpResponseMessage(responseBuilder.ToString());
FireEventProgress(parameters.ReportResponseProgress, responseBuilder.Length, responseBuilder.Length);
return result;
}
}
private async Task <HttpResponseMessage> HandleRedirects(SocksHttpManagerParameters parameters, Func <Uri, Task <HttpResponseMessage> > getResponse)
{
HttpResponseMessage response = await getResponse(parameters.Request.RequestUri);
int redirectsCount = 0;
while (parameters.Handler.AllowAutoRedirect && redirectCodes.Contains(response.StatusCode))
{
if (redirectsCount > parameters.Handler.MaxAutomaticRedirections)
{
throw new InvalidOperationException(Resources.TooManyRedirectsWasRequestedByServer);
}
response = await getResponse(response.Headers.Location);
redirectsCount++;
}
return(response);
}
public async Task <HttpResponseMessage> GetResponse(SocksHttpManagerParameters parameters)
{
return(await HandleRedirects(parameters, async uri =>
{
switch (parameters.ProxyType)
{
case SocksProxyTypes.CannotVerify:
case SocksProxyTypes.ChangesContent:
case SocksProxyTypes.Unchecked:
try
{
return await ReadHttpResponseMessage(parameters, uri, async(stream, remoteEP, cancellationToken) =>
{
await new SocksRequest().V4(stream, remoteEP, cancellationToken);
Application.SocksProxyHashTable.Add(GetProxyUri(parameters, uri).ToString(), SocksProxyTypes.Socks4);
});
}
catch (SocksRequestFailedException)
{
}
return await ReadHttpResponseMessage(parameters, uri, async(stream, remoteEP, cancellationToken) =>
{
await new SocksRequest().V5(stream, remoteEP, cancellationToken);
Application.SocksProxyHashTable.Add(GetProxyUri(parameters, uri).ToString(), SocksProxyTypes.Socks5);
});
case SocksProxyTypes.Socks4:
return await ReadHttpResponseMessage(parameters, uri, new SocksRequest().V4);
case SocksProxyTypes.Socks5:
return await ReadHttpResponseMessage(parameters, uri, new SocksRequest().V5);
default:
throw new InvalidOperationException(string.Format("Value '{0}' is not expected at SocksHttpManager.GetResponse", parameters.ProxyType));
}
}));
}
private Uri GetProxyUri(SocksHttpManagerParameters parameters, Uri uri)
{
return parameters.Handler.Proxy.GetProxy(uri);
}
private async Task<HttpResponseMessage> HandleRedirects(SocksHttpManagerParameters parameters, Func<Uri, Task<HttpResponseMessage>> getResponse)
{
HttpResponseMessage response = await getResponse(parameters.Request.RequestUri);
int redirectsCount = 0;
while (parameters.Handler.AllowAutoRedirect && redirectCodes.Contains(response.StatusCode))
{
if (redirectsCount > parameters.Handler.MaxAutomaticRedirections)
{
throw new InvalidOperationException(Resources.TooManyRedirectsWasRequestedByServer);
}
response = await getResponse(response.Headers.Location);
redirectsCount++;
}
return response;
}
private Uri GetProxyUri(SocksHttpManagerParameters parameters, Uri uri)
{
return(parameters.Handler.Proxy.GetProxy(uri));
}