pub fn new(version: Version, message_len: usize) -> Result<Response<()>>Expand description
Create a new Response for an http dns-message request
RFC 8484 DNS Queries over HTTPS (DoH) October 2018
4.2.1. Handling DNS and HTTP Errors
DNS response codes indicate either success or failure for the DNS
query. A successful HTTP response with a 2xx status code (see
Section 6.3 of [RFC7231]) is used for any valid DNS response,
regardless of the DNS response code. For example, a successful 2xx
HTTP status code is used even with a DNS message whose DNS response
code indicates failure, such as SERVFAIL or NXDOMAIN.
HTTP responses with non-successful HTTP status codes do not contain
replies to the original DNS question in the HTTP request. DoH
clients need to use the same semantic processing of non-successful
HTTP status codes as other HTTP clients. This might mean that the
DoH client retries the query with the same DoH server, such as if
there are authorization failures (HTTP status code 401; see
Section 3.1 of [RFC7235]). It could also mean that the DoH client
retries with a different DoH server, such as for unsupported media
types (HTTP status code 415; see Section 6.5.13 of [RFC7231]), or
where the server cannot generate a representation suitable for the
client (HTTP status code 406; see Section 6.5.6 of [RFC7231]), and so
on.