public async Task Invoke(HttpContext context)
{
var originalRequest = context.Request;
var mapping = _hostMappingOptions.Value;
var reqPath = $"{mapping.DownstreamScheme}{new HostString(mapping.DownstreamHost).ToUriComponent()}{context.Request.Path.ToUriComponent()}{context.Request.QueryString.ToUriComponent()}";
var remoteRequest = WebRequest.CreateHttp(reqPath);
var transportItems = context.Items[Constants.HTTP_CONTEXT_TRANSPORT_ITEMS] as TransportItems;
ProcessTransportItems(transportItems, remoteRequest);
_requestBuilder.CopyHeaders(context, remoteRequest, mapping);
_requestBuilder.CopyCookies(context, remoteRequest, mapping, transportItems?.Cookies, _webProxyoptions.Value.InternalCookies);
if (originalRequest.Body != null &&
(originalRequest.Method.Equals(HttpMethods.Patch, StringComparison.OrdinalIgnoreCase) ||
originalRequest.Method.Equals(HttpMethods.Post, StringComparison.OrdinalIgnoreCase) ||
originalRequest.Method.Equals(HttpMethods.Put, StringComparison.OrdinalIgnoreCase) ||
originalRequest.Method.Equals(HttpMethods.Options, StringComparison.OrdinalIgnoreCase)))
{
using (var remoteRequestStream = remoteRequest.GetRequestStream())
{
originalRequest.Body.CopyTo(remoteRequestStream);
}
}
HttpWebResponse remoteResponse = null;
try
{
remoteResponse = remoteRequest.GetResponse() as HttpWebResponse;
await ProcessRemoteResponse(context, remoteResponse, mapping);
}
catch (WebException we)
{
remoteResponse = (HttpWebResponse)we.Response;
await ProcessRemoteResponse(context, remoteResponse, mapping);
}
finally
{
remoteRequest = null;
remoteResponse?.Dispose();
}
}
