vweb: fix json() and text() results

examples/vweb/vweb_example.v

@@ -24,8 +24,8 @@ pub fn (mut app App) init_once() {
 pub fn (mut app App) init() {
 }
 
-pub fn (mut app App) json_endpoint() {
-	app.vweb.json('{"a": 3}')
+pub fn (mut app App) json_endpoint() vweb.Result {
+	return app.vweb.json('{"a": 3}')
 }
 
 pub fn (mut app App) index() vweb.Result {
@@ -37,11 +37,11 @@ pub fn (mut app App) index() vweb.Result {
 	return $vweb.html()
 }
 
-pub fn (mut app App) text() {
-	app.vweb.text('Hello world from vweb')
+pub fn (mut app App) text() vweb.Result {
+	return app.vweb.text('Hello world from vweb')
 }
 
-pub fn (mut app App) cookie() {
+pub fn (mut app App) cookie() vweb.Result {
 	app.vweb.set_cookie('cookie', 'test')
-	app.vweb.text('Headers: $app.vweb.headers')
+	return app.vweb.text('Headers: $app.vweb.headers')
 }

vlib/vweb/vweb.v

@@ -72,12 +72,14 @@ pub fn (mut ctx Context) html(s string) {
 	ctx.send_response_to_client('text/html', s)
 }
 
-pub fn (mut ctx Context) text(s string) {
+pub fn (mut ctx Context) text(s string) Result {
 	ctx.send_response_to_client('text/plain', s)
+	return vweb.Result{}
 }
 
-pub fn (mut ctx Context) json(s string) {
+pub fn (mut ctx Context) json(s string) Result {
 	ctx.send_response_to_client('application/json', s)
+	return vweb.Result{}
 }
 
 pub fn (mut ctx Context) redirect(url string) {
@@ -86,10 +88,11 @@ pub fn (mut ctx Context) redirect(url string) {
 	ctx.conn.send_string('HTTP/1.1 302 Found\r\nLocation: ${url}${ctx.headers}\r\n${headers_close}') or { return }
 }
 
-pub fn (mut ctx Context) not_found(s string) {
-	if ctx.done { return }
+pub fn (mut ctx Context) not_found() Result {
+	if ctx.done { return vweb.Result{} }
 	ctx.done = true
-	ctx.conn.send_string(http_404) or { return }
+	ctx.conn.send_string(http_404) or {}
+	return vweb.Result{}
 }
 
 pub fn (mut ctx Context) set_cookie(key, val string) {