#Hey the edit is showing error when i clicked. Can you help me figure this out?

9 messages · Page 1 of 1 (latest)

tepid niche
# 
import (
    "html/template"
    "log"
    "net/http"
    "os"
    "regexp"
)
type Page struct {
    Title string
    Body  []byte
}

func (p *Page) save() error {
    filename := p.Title + ".txt"
    return os.WriteFile(filename, p.Body, 0600)
}

func loadPage(title string) (*Page, error) {
    filename := title + ".txt"
    body, err := os.ReadFile(filename)
    if err != nil {
        return nil, err
    }
    return &Page{Title: title, Body: body}, nil
}

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)
}

var templates = template.Must(template.ParseFiles("edit.html", "view.html"))

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)
    }
}

var validPath = regexp.MustCompile("^/(edit|save|view)/([a-zA-Z0-9]+)$")

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 main() {
http.HandleFunc("/view/", makeHandler(viewHandler))
http.HandleFunc("/edit/", makeHandler(editHandler))
http.HandleFunc("/save/", makeHandler(saveHandler))
log.Fatal(http.ListenAndServe(":8080", nil))
}

# 
<html>
    <head></head>
    <body>    
    <h1>{{.Title}}</h1>

    <p>[<a href="/edit{{.Title}}">edit</a>]</p>

    <div>{{printf "%s" .Body}}</div>
    </body>
</html>

``` //view.htnl
# 
<html>
    <head></head>
    <body>
        <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>
    </body> 
</html>

```//edit.html
silent pagoda
#

Am I missing something, where is the error message

tepid niche
#

when i click enter its not able to edit. its showing 404 error. how to make it able to edit?

#

its the renderTemplate functions error thats showing up right?

silent pagoda
#

You don't even know where the error is coming from? Start with that then, easier to find causes with it