created main.go with packages:

fmt
log
io/ioutil
net/http

type:
Page

func:
Page.save

main.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+  "fmt"
+  "log"
+  "io/ioutil"
+  "net/http"
+)
+
+type Page struct {
+  Title string
+  Body  []byte
+}
+
+func (p *Page) save() error {
+    return ioutil.WriteFile(p.Title + ".txt", p.Body, 0600)
+}