6.44Notes on Headers Ignored During Forwarding

Created on Aug 17, 2026~3 min read

When using the HttpContext forwarding feature, the system automatically ignores the following request and response headers to ensure the validity and accuracy of the forwarding:

  • Request headers that will be ignored:

    • X-Forward-To
    • Host
    • Content-Length

  • Response headers that will be ignored:

    • Content-Type
    • Transfer-Encoding
    • Keep-Alive
    • Upgrade
    • Proxy-Connection

If you need to add more settings for ignored request or response headers, you can configure them through HttpContextForwardOptions. There are two configuration approaches:

  • Global configuration:

In the project's Startup.cs or Program.cs file, register and configure the service:

cs
services.Configure<HttpContextForwardOptions>(options =>{    // List of request headers to skip during forwarding    options.IgnoreRequestHeaders = ["Framework"];    // List of response headers to skip during forwarding    options.IgnoreResponseHeaders = ["Content-Length"];});
  • Per-forward configuration:

For a single forward, you can pass HttpContextForwardOptions for configuration:

cs
httpContext.ForwardAsResult("https://furion.net", forwardOptions: new HttpContextForwardOptions{    // List of request headers to skip during forwarding    options.IgnoreRequestHeaders = ["Framework"];    // List of response headers to skip during forwarding    options.IgnoreResponseHeaders = ["Content-Length"];});