From c792f7f5703265db6075505dea0d3975e095be3c Mon Sep 17 00:00:00 2001
From: Alexey Yerin <yyp@disroot.org>
Date: Tue, 11 May 2021 11:32:38 +0300
Subject: [PATCH] web: reject any whitespace-only input

---
 web.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/web.go b/web.go
index 6bb5bae..bee575b 100644
--- a/web.go
+++ b/web.go
@@ -3,6 +3,7 @@ package main
 import (
 	"html/template"
 	"net/http"
+	"strings"
 )
 
 func CreateWebHandler(tmpl *template.Template, settings *TranslateSettings) func(w http.ResponseWriter, req *http.Request) {
@@ -24,7 +25,7 @@ func CreateWebHandler(tmpl *template.Template, settings *TranslateSettings) func
 		to := req.FormValue("to")
 		text := req.FormValue("text")
 
-		if text == "" {
+		if strings.TrimSpace(text) == "" {
 			tmpl.ExecuteTemplate(w, "index", indexPageData{Languages, from, to, text, ""})
 			return
 		}