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fix(dns): allow http:// DoH resolvers #645

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@lidel lidel commented Jul 29, 2024

This PR allows people to run own DNS over HTTP(S) resolver on the same box or within same secure LAN, without setting up unnecessary TLS certs.

Main use case is to simplify self-hosting of ENS resolves by gateway operations etc.

allows people to run own DoH resolver on the same box
or within same secure VLAN/VPN/infra
@lidel lidel force-pushed the fix/allow-local-doh-endpoints branch from e99d6ba to f736895 Compare July 29, 2024 21:28
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codecov bot commented Jul 29, 2024

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 59.87%. Comparing base (0190b70) to head (f736895).
Report is 1 commits behind head on main.

Impacted file tree graph

@@            Coverage Diff             @@
##             main     #645      +/-   ##
==========================================
+ Coverage   59.75%   59.87%   +0.12%     
==========================================
  Files         238      238              
  Lines       29999    29999              
==========================================
+ Hits        17926    17963      +37     
+ Misses      10450    10418      -32     
+ Partials     1623     1618       -5     
Files Coverage Δ
gateway/dns.go 37.77% <0.00%> (ø)

... and 13 files with indirect coverage changes

@@ -15,8 +15,8 @@ var defaultResolvers = map[string]string{
}

func newResolver(url string, opts ...doh.Option) (madns.BasicResolver, error) {
if !strings.HasPrefix(url, "https://") {
return nil, fmt.Errorf("invalid resolver url: %s", url)
if !strings.HasPrefix(url, "https://") && !strings.HasPrefix(url, "http://") {
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I don't think this is going to be enough:
https://github.com/libp2p/go-doh-resolver/blob/f2e25860684789200e3a3a911dc9a74d01771d5b/resolver.go#L55

Note: AFAICT there is no DNS-over-HTTP spec for some reason it's specified as being over HTTPS, however I definitely see your point and have definitely felt the pain over the self-signed cert dance just to run local resolvers

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Yep, filled this PR because I am looking at https://github.com/libp2p/go-doh-resolver and https://github.com/multiformats/go-multiaddr-dns to wire up TTL (to fix #329 (comment) for DNSLinks), so likely will relax things there as well, and get back to this PR draft.

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2 participants