package responses import ( "fmt" "html/template" "log" "net/http" ) // RenderTemplate renders a Go HTML template. // The io.Writer can be an http.ResponseWriter. func RenderTemplate(w http.ResponseWriter, r *http.Request, tmpl string, vars interface{}) error { if vars == nil { vars = NewTemplateVars(w, r) } w.Header().Set("Content-Type", "text/html; charset=utf-8") // Look for the built-in template. if b, err := GetFile(tmpl); err == nil { t, err := template.New(tmpl).Funcs(TemplateFuncs(r)).Parse(string(b)) if err != nil { log.Printf("bundled template '%s': %s", tmpl, err) return err } // We found the template. Can we find the layout html? if layout, err := GetFile(".layout.gohtml"); err == nil { _, err := t.New("layout").Parse(string(layout)) if err != nil { log.Printf("RenderTemplate(.layout.gohtml): %s", err) } } else { log.Printf("RenderTemplate: .layout.gohtml not found to wrap %s", tmpl) } fmt.Printf("Render Templ: %s", tmpl) if err := t.ExecuteTemplate(w, "layout", vars); err != nil { log.Printf("RenderTemplate(%s): %s", tmpl, err) } log.Println("Done") return nil } else { Panic(w, http.StatusInternalServerError, err.Error()) } return nil }