How to pass the parsed Template to the html file writing function?

Question

go

Hello. The createIndexFile function creates an html file and writes data to it, but I can’t pass the value from t.ExecuteTemplate to this function, can anyone know how to implement this?
writePost (path string){
t, err := template.ParseFiles("/root/go/templates/site/tape/index.html", "/root/go/templates/site/tape/header.html", " /root/go/templates/site/tape/footer.html")
if err != nil {
writeError(err)
return 0
}
var data io.Writer
t.ExecuteTemplate(data, "index", Data)
createIndexFile(path, data, 0644, uig, gid) // Function to write html file
}

Answer 1

You need to pass a ready-made Writer to the ExecuteTemplate function. That is, first open the file, then call ExecuteTemplate.

package main

import (
  "html/template"
  "log"
  "os"
)

type Data struct {
  Text string
}

func main() {
  t := template.Must(template.New("index").Parse(`Some template code. Text: {{.Text}}`))

  file, err := os.Create("outfile.htm")
  if err != nil {
    log.Fatal("Cannot create file: ", err)
  }
  defer file.Close()
  t.ExecuteTemplate(file, "index", Data{Text: "Hello"})
}