fix(ext/fetch): use correct ALPN to socks5 proxies (#24817)

Closes #24632 
Closes #24719

1 files changed, 8 insertions, 1 deletions

diff --git a/ext/fetch/proxy.rs b/ext/fetch/proxy.rs
index f23df5dd0..32a445d8b 100644
--- a/ext/fetch/proxy.rs
+++ b/ext/fetch/proxy.rs
@@ -727,7 +727,14 @@ where
         }
       }
       Proxied::Socks(ref p) => p.connected(),
-      Proxied::SocksTls(ref p) => p.inner().get_ref().0.connected(),
+      Proxied::SocksTls(ref p) => {
+        let tunneled_tls = p.inner().get_ref();
+        if tunneled_tls.1.alpn_protocol() == Some(b"h2") {
+          tunneled_tls.0.connected().negotiated_h2()
+        } else {
+          tunneled_tls.0.connected()
+        }
+      }
     }
   }
 }