fix(tls): Make TLS clients support HTTP/2 (#12530)

`fetch()` and client-side websocket used to support HTTP/2, but this
regressed in #11491. This patch reenables it by explicitly adding `h2`
and `http/1.1` to the list of ALPN protocols on the HTTP and websocket
clients.

1 files changed, 36 insertions, 0 deletions

diff --git a/cli/tests/unit/fetch_test.ts b/cli/tests/unit/fetch_test.ts
index a2bd1741b..bc61d67b5 100644
--- a/cli/tests/unit/fetch_test.ts
+++ b/cli/tests/unit/fetch_test.ts
@@ -1324,3 +1324,39 @@ unitTest(
       }), TypeError);
   },
 );
+
+unitTest(
+  { permissions: { net: true, read: true } },
+  async function fetchSupportsHttp1Only() {
+    const caCert = await Deno.readTextFile("cli/tests/testdata/tls/RootCA.pem");
+    const client = Deno.createHttpClient({ caCerts: [caCert] });
+    const res = await fetch("https://localhost:5546/http_version", { client });
+    assert(res.ok);
+    assertEquals(await res.text(), "HTTP/1.1");
+    client.close();
+  },
+);
+
+unitTest(
+  { permissions: { net: true, read: true } },
+  async function fetchSupportsHttp2() {
+    const caCert = await Deno.readTextFile("cli/tests/testdata/tls/RootCA.pem");
+    const client = Deno.createHttpClient({ caCerts: [caCert] });
+    const res = await fetch("https://localhost:5547/http_version", { client });
+    assert(res.ok);
+    assertEquals(await res.text(), "HTTP/2.0");
+    client.close();
+  },
+);
+
+unitTest(
+  { permissions: { net: true, read: true } },
+  async function fetchPrefersHttp2() {
+    const caCert = await Deno.readTextFile("cli/tests/testdata/tls/RootCA.pem");
+    const client = Deno.createHttpClient({ caCerts: [caCert] });
+    const res = await fetch("https://localhost:5545/http_version", { client });
+    assert(res.ok);
+    assertEquals(await res.text(), "HTTP/2.0");
+    client.close();
+  },
+);