method

send_early_hints

v6.0.0 - Show latest stable - 0 notes - Class: ActionDispatch::Request

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What's this?

send_early_hints(links) public

Early Hints is an HTTP/2 status code that indicates hints to help a client start making preparations for processing the final response.

If the env contains rack.early_hints then the server accepts HTTP2 push for Link headers.

The send_early_hints method accepts a hash of links as follows:

send_early_hints("Link" => "</style.css>; rel=preload; as=style\n</script.js>; rel=preload")

If you are using javascript_include_tag or stylesheet_link_tag the Early Hints headers are included by default if supported.

Show source

# File actionpack/lib/action_dispatch/http/request.rb, line 214
    def send_early_hints(links)
      return unless env["rack.early_hints"]

      env["rack.early_hints"].call(links)
    end

send_early_hints

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