Browse Source

add gowiki

master
Amolith 3 months ago
parent
commit
952fa5a40d
Signed by: Amolith GPG Key ID: 5548AD9930655715
  1. 3
      gowiki/about.txt
  2. 6
      gowiki/edit.html
  3. 3
      gowiki/go.mod
  4. 5
      gowiki/view.html
  5. BIN
      gowiki/wiki
  6. 95
      gowiki/wiki.go

3
gowiki/about.txt

@ -0,0 +1,3 @@
This is a simple wiki created in Go following an official guide from the Go developers.
https://golang.org/doc/articles/wiki/

6
gowiki/edit.html

@ -0,0 +1,6 @@
<h1>Editing {{.Title}}</h1>
<form action="/save/{{.Title}}" method="POST">
<div><textarea name="body" rows="20" cols="80">{{printf "%s" .Body}}</textarea></div>
<div><input type="submit" value="Save"></div>
</form>

3
gowiki/go.mod

@ -0,0 +1,3 @@
module example.com/gowiki
go 1.17

5
gowiki/view.html

@ -0,0 +1,5 @@
<h1>{{.Title}}</h1>
<p>[<a href="/edit/{{.Title}}">edit</a>]</p>
<div>{{printf "%s" .Body}}</div>

BIN
gowiki/wiki

Binary file not shown.

95
gowiki/wiki.go

@ -0,0 +1,95 @@
package main
import (
"errors"
"html/template"
"io/ioutil"
"log"
"net/http"
"regexp"
)
type Page struct {
Title string
Body []byte
}
var templates = template.Must(template.ParseFiles("edit.html", "view.html"))
var validPath = regexp.MustCompile("^/(edit|save|view)/([a-zA-Z0-9]+)$")
func (p *Page) save() error {
filename := p.Title + ".txt"
return ioutil.WriteFile(filename, p.Body, 0600)
}
func getTitle(w http.ResponseWriter, r *http.Request) (string, error) {
m := validPath.FindStringSubmatch(r.URL.Path)
if m == nil {
http.NotFound(w, r)
return "", errors.New("invalid Page Title")
}
return m[2], nil // The title is the second subexpression.
}
func loadPage(title string) (*Page, error) {
filename := 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) {
err := templates.ExecuteTemplate(w, tmpl+".html", p)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
func makeHandler(fn func(http.ResponseWriter, *http.Request, string)) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
m := validPath.FindStringSubmatch(r.URL.Path)
if m == nil {
http.NotFound(w, r)
return
}
fn(w, r, m[2])
}
}
func viewHandler(w http.ResponseWriter, r *http.Request, title string) {
p, err := loadPage(title)
if err != nil {
http.Redirect(w, r, "/edit/"+title, http.StatusFound)
return
}
renderTemplate(w, "view", p)
}
func editHandler(w http.ResponseWriter, r *http.Request, title string) {
p, err := loadPage(title)
if err != nil {
p = &Page{Title: title}
}
renderTemplate(w, "edit", p)
}
func saveHandler(w http.ResponseWriter, r *http.Request, title string) {
body := r.FormValue("body")
p := &Page{Title: title, Body: []byte(body)}
err := p.save()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
http.Redirect(w, r, "/view/"+title, http.StatusFound)
}
func main() {
http.HandleFunc("/view/", makeHandler(viewHandler))
http.HandleFunc("/edit/", makeHandler(editHandler))
http.HandleFunc("/save/", makeHandler(saveHandler))
log.Fatal(http.ListenAndServe(":8173", nil))
}
Loading…
Cancel
Save