Enable "ForceAttemptHTTP2" for DoH upstreamClient (#519)

According to https://pkg.go.dev/net/http#Transport, when TLSClientConfig is provided, HTTP/2 will be disabled. Setting this option to true, when using custom TLS config, will still attempt HTTP/2 upgrades.
0xERR0R · May 16, 2022 · 63cfaba · 63cfaba
1 parent 3392de0
commit 63cfaba
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/resolver/upstream_resolver.go b/resolver/upstream_resolver.go
@@ -68,6 +68,7 @@ func createUpstreamClient(cfg config.Upstream) upstreamClient {
 				Transport: &http.Transport{
 					TLSClientConfig:     &tlsConfig,
 					TLSHandshakeTimeout: defaultTLSHandshakeTimeout,
+					ForceAttemptHTTP2:   true,
 				},
 				Timeout: timeout,
 			},