cmd/tailscale/cli: allow empty text ("") serveshayne/serve_empty_text_handler

Current behavior is broken. `tailscale serve text / ""` returns no error
and shows up in `tailscale serve status` but requests return a 500
"empty handler".

The commit changes the handler field `Text` to type of `*string`.

Closes #6405

Signed-off-by: Shayne Sweeney <shayne@tailscale.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/ipn/ipn_view.go b/ipn/ipn_view.go
index c117148da..5ec360e73 100644
--- a/ipn/ipn_view.go
+++ b/ipn/ipn_view.go
@@ -290,13 +290,19 @@ func (v *HTTPHandlerView) UnmarshalJSON(b []byte) error {
 
 func (v HTTPHandlerView) Path() string  { return v.ж.Path }
 func (v HTTPHandlerView) Proxy() string { return v.ж.Proxy }
-func (v HTTPHandlerView) Text() string  { return v.ж.Text }
+func (v HTTPHandlerView) Text() *string {
+	if v.ж.Text == nil {
+		return nil
+	}
+	x := *v.ж.Text
+	return &x
+}
 
 // A compilation failure here means this code must be regenerated, with the command at the top of this file.
 var _HTTPHandlerViewNeedsRegeneration = HTTPHandler(struct {
 	Path  string
 	Proxy string
-	Text  string
+	Text  *string
 }{})
 
 // View returns a readonly view of WebServerConfig.