nicer 400 error page

pages.go

@@ -86,7 +86,10 @@ func oopsHandler(c web.C, w http.ResponseWriter, r *http.Request, rt RespType, m
 
 func badRequestHandler(c web.C, w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusBadRequest)
-	http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
+	err := Templates["400.html"].ExecuteWriter(pongo2.Context{}, w)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
 }
 
 func unauthorizedHandler(c web.C, w http.ResponseWriter, r *http.Request) {

templates.go

@@ -45,8 +45,9 @@ func populateTemplatesMap(tSet *pongo2.TemplateSet, tMap map[string]*pongo2.Temp
 		"index.html",
 		"paste.html",
 		"API.html",
-		"404.html",
+		"400.html",
 		"401.html",
+		"404.html",
 		"oops.html",
 
 		"display/audio.html",

templates/400.html

@@ -0,0 +1,5 @@
+{% extends "base.html" %}
+
+{% block content %}
+400 Bad Request
+{% endblock %}