Response headers that should be applied to whatever Response ends up being sent back to the client.

WHATWG URL object generated from the request.url.

The request path. This is intended to be modified by a Stack. When the RequestData is initially generated, this is equal to the url.pathname. As the request gets processed, the Stack matches this path against registered routes. When a route matches and has a forwarded-wildcard (ends in "/*"), this path will be the value of that wildcard inside the next handler (either an Rpc or Stack). When a route matches and doesn't have that wildcard, the Stack will modify this path to be "/" inside the next handler.

As Stacks process a request, they can capture path groups. The path groups are stored in this object. Old groups will be overwritten by groups captured further down the handler tree.

An object created from the url.searchParams. This is what gets processed when an Rpc has a "query" parser.