I'm following this tutorial: golang tutorial - wiki and I've managed to get everything working except the last point in the "other task" section. My Implementation of the tutorial:
package main
import (
"fmt"
"io/ioutil"
"net/http"
"html/template"
"regexp"
)
type Page struct {
Title string
Body []byte
}
func (p *Page) save() error {
filename := "data/" + p.Title + ".txt"
return ioutil.WriteFile(filename, p.Body, 0600)
}
func loadPage(title string) (*Page, error) {
filename := "data/" + title + ".txt"
body, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
return &Page{Title: title, Body: body}, nil
}
func renderTemplate(w http.ResponseWriter, tmpl string, p *Page) {
t, _ := template.ParseFiles("template/" + tmpl + ".html");
t.Execute(w, p)
}
func viewHandler(w http.ResponseWriter, r *http.Request) {
title := r.URL.Path[len("/view/"):]
p, err := loadPage(title)
if err != nil {
http.Redirect(w, r, "/edit/" + title, http.StatusFound);
return
}
expr := regexp.MustCompile(`\[.+\]`)
p.Body = expr.ReplaceAllFunc(p.Body, func ( match []byte) []byte {
return []byte("<a href='/view/" + string(match) + "'>" + string(match) + "</a>")
})
renderTemplate(w, "view", p);
}
func saveHandler(w http.ResponseWriter, r *http.Request) {
title := r.URL.Path[len("/save/"):]
body := r.FormValue("body")
p := &Page{Title: title, Body: []byte(body)}
p.save()
http.Redirect(w, r, "/view/" + title, http.StatusFound)
}
func editHandler(w http.ResponseWriter, r *http.Request) {
title := r.URL.Path[len("/edit/"):]
p, err := loadPage(title);
if err != nil {
p = &Page{Title: title}
}
renderTemplate(w, "edit", p);
}
func main() {
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
http.Redirect(w, r, "/view/index", http.StatusFound)
})
http.HandleFunc("/view/", viewHandler)
http.HandleFunc("/edit/", editHandler)
http.HandleFunc("/save/", saveHandler)
http.ListenAndServe(":8080", nil)
fmt.Println("Running");
}
html/template engine prints the anchor tag as expected, but escapes it with html entities. I've not been able to find appropriate way of doing it.
