error running examples (firefox only?)

[splace]

when trying example i get error.

this is due to firefox being a json browser and the examples are returning plain/text but saying they are returning json.

writer.Header().Set("Content-Type", "application/json")
q := request.URL.Query()
query := q.Get("q")
if query != "" {
	var (
		ast *parser.SelectTree
	)

	p := &parser.Parser{}
	if p.GetSQLType(query) != parser.SELECT {
		_, _ = fmt.Fprintf(writer, "not a SELECT statement")
		return
	}

for all the error printing lines, this will fix;

example;
http.Error(writer, "not a SELECT statement", http.StatusBadRequest)
from
_, _ = fmt.Fprintf(writer, "not a SELECT statement")

but the data written will also have to be converted to json.