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cmd/hello: in dev mode, live reload template

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This commit is contained in:
Brad Fitzpatrick 2021-02-11 10:53:33 -08:00
parent 11bbfbd8bb
commit de3001bc79
1 changed files with 20 additions and 1 deletions
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21
cmd/hello/hello.go
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@ -29,6 +29,9 @@
func main() { func main() {
flag.Parse() flag.Parse()
if !devMode() {
tmpl = template.Must(template.New("home").Parse(slurpHTML()))
}
http.HandleFunc("/", root) http.HandleFunc("/", root)
log.Printf("Starting hello server.") log.Printf("Starting hello server.")
@ -61,7 +64,16 @@ func slurpHTML() string {
return string(slurp) return string(slurp)
} }
var tmpl = template.Must(template.New("home").Parse(slurpHTML())) func devMode() bool { return *httpsAddr == "" && *httpAddr != "" }
func getTmpl() (*template.Template, error) {
if devMode() {
return template.New("home").Parse(slurpHTML())
}
return tmpl, nil
}
var tmpl *template.Template // not used in dev mode, initialized by main after flag parse
type tmplData struct { type tmplData struct {
DisplayName string // "Foo Barberson" DisplayName string // "Foo Barberson"
@ -88,6 +100,13 @@ func root(w http.ResponseWriter, r *http.Request) {
http.Error(w, "no remote addr", 500) http.Error(w, "no remote addr", 500)
return return
} }
tmpl, err := getTmpl()
if err != nil {
w.Header().Set("Content-Type", "text/plain")
http.Error(w, "template error: "+err.Error(), 500)
return
}
who, err := whoIs(ip) who, err := whoIs(ip)
if err != nil { if err != nil {
log.Printf("whois(%q) error: %v", ip, err) log.Printf("whois(%q) error: %v", ip, err)