fix: Status message is not supported on HTTP/2 (#1264)

lib/application.js

@@ -222,7 +222,11 @@ function respond(ctx) {
 
   // status body
   if (null == body) {
-    body = ctx.message || String(code);
+    if (ctx.req.httpVersionMajor >= 2) {
+      body = String(code);
+    } else {
+      body = ctx.message || String(code);
+    }
     if (!res.headersSent) {
       ctx.type = 'text';
       ctx.length = Buffer.byteLength(body);

test/application/response.js

@@ -9,6 +9,7 @@ describe('app.response', () => {
   const app1 = new Koa();
   app1.response.msg = 'hello';
   const app2 = new Koa();
+  const app3 = new Koa();
 
   it('should merge properties', () => {
     app1.use((ctx, next) => {
@@ -31,4 +32,15 @@ describe('app.response', () => {
       .get('/')
       .expect(204);
   });
+
+  it('should not include status message in body for http2', async () => {
+    app3.use((ctx, next) => {
+      ctx.req.httpVersionMajor = 2;
+      ctx.status = 404;
+    });
+    const response = await request(app3.listen())
+      .get('/')
+      .expect(404);
+    assert.equal(response.text, '404');
+  });
 });