private async Task <HttpResponseMessage> SendWithProxyAsync(
Uri proxyUri, HttpRequestMessage request, CancellationToken cancellationToken)
{
if (proxyUri.Scheme != UriScheme.Http)
{
throw new NotSupportedException(SR.net_http_invalid_proxy_scheme);
}
HttpResponseMessage response = await GetConnectionAndSendAsync(request, proxyUri, cancellationToken).ConfigureAwait(false);
// Handle proxy authentication
if (response.StatusCode == HttpStatusCode.ProxyAuthenticationRequired)
{
foreach (AuthenticationHeaderValue h in response.Headers.ProxyAuthenticate)
{
if (h.Scheme == AuthenticationHelper.Basic)
{
NetworkCredential credential =
_proxy.Credentials?.GetCredential(proxyUri, AuthenticationHelper.Basic) ??
_defaultCredentials?.GetCredential(proxyUri, AuthenticationHelper.Basic);
if (credential != null)
{
// TODO #23156: Drain response before disposing.
response.Dispose();
request.Headers.ProxyAuthorization = new AuthenticationHeaderValue(AuthenticationHelper.Basic,
AuthenticationHelper.GetBasicTokenForCredential(credential));
response = await GetConnectionAndSendAsync(request, proxyUri, cancellationToken).ConfigureAwait(false);
}
break;
}
else if (h.Scheme == AuthenticationHelper.Digest)
{
NetworkCredential credential =
_proxy.Credentials?.GetCredential(proxyUri, AuthenticationHelper.Digest) ??
_defaultCredentials?.GetCredential(proxyUri, AuthenticationHelper.Digest);
if (credential != null)
{
// Update digest response with new parameter from Proxy-Authenticate
AuthenticationHelper.DigestResponse digestResponse = new AuthenticationHelper.DigestResponse(h.Parameter);
if (await AuthenticationHelper.TrySetDigestAuthToken(request, credential, digestResponse, HttpKnownHeaderNames.ProxyAuthorization).ConfigureAwait(false))
{
// TODO #23156: Drain response before disposing.
response.Dispose();
response = await GetConnectionAndSendAsync(request, proxyUri, cancellationToken).ConfigureAwait(false);
// Retry in case of nonce timeout in server.
if (response.StatusCode == HttpStatusCode.ProxyAuthenticationRequired)
{
foreach (AuthenticationHeaderValue ahv in response.Headers.ProxyAuthenticate)
{
if (ahv.Scheme == AuthenticationHelper.Digest)
{
digestResponse = new AuthenticationHelper.DigestResponse(ahv.Parameter);
if (AuthenticationHelper.IsServerNonceStale(digestResponse) &&
await AuthenticationHelper.TrySetDigestAuthToken(request, credential, digestResponse, HttpKnownHeaderNames.ProxyAuthorization).ConfigureAwait(false))
{
response.Dispose();
response = await _innerHandler.SendAsync(request, cancellationToken).ConfigureAwait(false);
}
break;
}
}
}
}
break;
}
}
}
}
return(response);
}
private async Task <HttpResponseMessage> SendWithProxyAsync(
Uri proxyUri, HttpRequestMessage request, CancellationToken cancellationToken)
{
if (proxyUri.Scheme != UriScheme.Http)
{
throw new InvalidOperationException(SR.net_http_invalid_proxy_scheme);
}
if (!HttpUtilities.IsSupportedNonSecureScheme(request.RequestUri.Scheme))
{
// TODO #23136: Implement SSL tunneling through proxy
throw new NotImplementedException("no support for SSL tunneling through proxy");
}
HttpConnection connection = await GetOrCreateConnection(request, proxyUri, cancellationToken).ConfigureAwait(false);
HttpResponseMessage response = await connection.SendAsync(request, cancellationToken).ConfigureAwait(false);
// Handle proxy authentication
if (response.StatusCode == HttpStatusCode.ProxyAuthenticationRequired)
{
foreach (AuthenticationHeaderValue h in response.Headers.ProxyAuthenticate)
{
// We only support Basic auth, ignore others
if (h.Scheme == AuthenticationHelper.Basic)
{
NetworkCredential credential =
_proxy.Credentials?.GetCredential(proxyUri, AuthenticationHelper.Basic) ??
_defaultCredentials?.GetCredential(proxyUri, AuthenticationHelper.Basic);
if (credential != null)
{
response.Dispose();
request.Headers.ProxyAuthorization = new AuthenticationHeaderValue(AuthenticationHelper.Basic,
AuthenticationHelper.GetBasicTokenForCredential(credential));
connection = await GetOrCreateConnection(request, proxyUri, cancellationToken).ConfigureAwait(false);
response = await connection.SendAsync(request, cancellationToken).ConfigureAwait(false);
}
break;
}
else if (h.Scheme == AuthenticationHelper.Digest)
{
NetworkCredential credential =
_proxy.Credentials?.GetCredential(proxyUri, AuthenticationHelper.Digest) ??
_defaultCredentials?.GetCredential(proxyUri, AuthenticationHelper.Digest);
if (credential != null)
{
// Update digest response with new parameter from Proxy-Authenticate
AuthenticationHelper.DigestResponse digestResponse = new AuthenticationHelper.DigestResponse(h.Parameter);
if (await AuthenticationHelper.TrySetDigestAuthToken(request, credential, digestResponse, HttpKnownHeaderNames.ProxyAuthorization).ConfigureAwait(false))
{
response.Dispose();
response = await _innerHandler.SendAsync(request, cancellationToken).ConfigureAwait(false);
// Retry in case of nonce timeout in server.
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
foreach (AuthenticationHeaderValue ahv in response.Headers.ProxyAuthenticate)
{
if (ahv.Scheme == AuthenticationHelper.Digest)
{
digestResponse = new AuthenticationHelper.DigestResponse(ahv.Parameter);
if (AuthenticationHelper.IsServerNonceStale(digestResponse) &&
await AuthenticationHelper.TrySetDigestAuthToken(request, credential, digestResponse, HttpKnownHeaderNames.ProxyAuthorization).ConfigureAwait(false))
{
response.Dispose();
response = await _innerHandler.SendAsync(request, cancellationToken).ConfigureAwait(false);
}
break;
}
}
}
}
break;
}
}
}
}
return(response);
}
private async Task <HttpResponseMessage> SendWithProxyAsync(
Uri proxyUri, HttpRequestMessage request, CancellationToken cancellationToken)
{
if (proxyUri.Scheme != UriScheme.Http)
{
throw new InvalidOperationException($"invalid scheme {proxyUri.Scheme} for proxy");
}
if (request.RequestUri.Scheme == UriScheme.Https)
{
// TODO #21452: Implement SSL tunneling through proxy
throw new NotImplementedException("no support for SSL tunneling through proxy");
}
HttpConnection connection = await GetOrCreateConnection(request, proxyUri).ConfigureAwait(false);
HttpResponseMessage response = await connection.SendAsync(request, cancellationToken).ConfigureAwait(false);
// Handle proxy authentication
if (response.StatusCode == HttpStatusCode.ProxyAuthenticationRequired)
{
foreach (AuthenticationHeaderValue h in response.Headers.ProxyAuthenticate)
{
// We only support Basic auth, ignore others
const string Basic = "Basic";
if (h.Scheme == Basic)
{
NetworkCredential credential =
_proxy.Credentials?.GetCredential(proxyUri, Basic) ??
_defaultCredentials?.GetCredential(proxyUri, Basic);
if (credential != null)
{
response.Dispose();
request.Headers.ProxyAuthorization = new AuthenticationHeaderValue(Basic,
AuthenticationHelper.GetBasicTokenForCredential(credential));
connection = await GetOrCreateConnection(request, proxyUri).ConfigureAwait(false);
response = await connection.SendAsync(request, cancellationToken).ConfigureAwait(false);
}
break;
}
}
}
return(response);
}