private static void UseProxyToLocalWebpackDevMiddleware(this IApplicationBuilder appBuilder, string publicPath, int proxyToPort, TimeSpan requestTimeout)
{
// Note that this is hardcoded to make requests to "localhost" regardless of the hostname of the
// server as far as the client is concerned. This is because ConditionalProxyMiddlewareOptions is
// the one making the internal HTTP requests, and it's going to be to some port on this machine
// because aspnet-webpack hosts the dev server there. We can't use the hostname that the client
// sees, because that could be anything (e.g., some upstream load balancer) and we might not be
// able to make outbound requests to it from here.
// Also note that the webpack HMR service always uses HTTP, even if your app server uses HTTPS,
// because the HMR service has no need for HTTPS (the client doesn't see it directly - all traffic
// to it is proxied), and the HMR service couldn't use HTTPS anyway (in general it wouldn't have
// the necessary certificate).
var proxyOptions = new ConditionalProxyMiddlewareOptions(
"http", "localhost", proxyToPort.ToString(), requestTimeout);
appBuilder.UseMiddleware <ConditionalProxyMiddleware>(publicPath, proxyOptions);
}
public ConditionalProxyMiddleware(
RequestDelegate next,
string pathPrefix,
ConditionalProxyMiddlewareOptions options)
{
if (!pathPrefix.StartsWith("/"))
{
pathPrefix = "/" + pathPrefix;
}
_next = next;
_pathPrefix = pathPrefix;
_pathPrefixIsRoot = string.Equals(_pathPrefix, "/", StringComparison.Ordinal);
_options = options;
_httpClient = new HttpClient(new HttpClientHandler());
_httpClient.Timeout = _options.RequestTimeout;
}
