fix: could panic if http2 disabled but TLS negotiated h2 (#2194)

The fix is only ask for h2 ALPN iff the http2 feature is enabled. Closes #2192
seanmonstar · Mar 20, 2024 · 7a5df21 · 7a5df21
1 parent d5051f9
commit 7a5df21
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/async_impl/client.rs b/src/async_impl/client.rs
@@ -590,7 +590,11 @@ impl ClientBuilder {
                             tls.alpn_protocols = vec!["h3".into()];
                         }
                         HttpVersionPref::All => {
-                            tls.alpn_protocols = vec!["h2".into(), "http/1.1".into()];
+                            tls.alpn_protocols = vec![
+                                #[cfg(feature = "http2")]
+                                "h2".into(),
+                                "http/1.1".into(),
+                            ];
                         }
                     }