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Issue umputun#31: Replace separate UI with the embedded HTMX based
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,232 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "github.com/go-chi/chi/v5" | ||
| log "github.com/go-pkgz/lgr" | ||
| "github.com/pkg/errors" | ||
| "github.com/umputun/secrets/backend/app/messager" | ||
| "github.com/umputun/secrets/backend/app/store" | ||
| "github.com/umputun/secrets/backend/app/validator" | ||
| "net/http" | ||
| "strconv" | ||
| "time" | ||
| ) | ||
|
|
||
| const ( | ||
| baseTmpl = "base" | ||
| mainTmpl = "main" | ||
| errorTmpl = "error" | ||
|
|
||
| msgKey = "message" | ||
| pinKey = "pin" | ||
| expKey = "exp" | ||
| expUnitKey = "exp-unit" | ||
| keyKey = "key" | ||
| ) | ||
|
|
||
| type createMsgForm struct { | ||
| Message string | ||
| Pin string | ||
| Exp int | ||
| ExpUnit string | ||
| validator.Validator | ||
| } | ||
|
|
||
| type showMsgForm struct { | ||
| Key string | ||
| Pin string | ||
| Message string | ||
| validator.Validator | ||
| } | ||
|
|
||
| type templateData struct { | ||
| Form any | ||
| PinSize int | ||
| } | ||
|
|
||
| func (s Server) render(w http.ResponseWriter, status int, page string, tmplName string, data any) { | ||
| ts, ok := s.TemplateCache[page] | ||
| if !ok { | ||
| err := fmt.Errorf("the template %s does not exist", page) | ||
| log.Printf("[ERROR] %v", err) | ||
| http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
|
||
| buf := new(bytes.Buffer) | ||
|
|
||
| if tmplName == "" { | ||
| tmplName = baseTmpl | ||
| } | ||
| err := ts.ExecuteTemplate(buf, tmplName, data) | ||
| if err != nil { | ||
| log.Printf("[ERROR] %v", err) | ||
| http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
|
||
| w.WriteHeader(status) | ||
| _, err = buf.WriteTo(w) | ||
| if err != nil { | ||
| log.Printf("[ERROR] %v", err) | ||
| http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| // renders the home page | ||
| func (s Server) indexCtrl(w http.ResponseWriter, r *http.Request) { | ||
| data := templateData{ | ||
| Form: createMsgForm{}, | ||
| PinSize: s.PinSize, | ||
| } | ||
| s.render(w, http.StatusOK, "home.tmpl.html", baseTmpl, data) | ||
| } | ||
|
|
||
| // renders the generate link page | ||
| func (s Server) generateLink(w http.ResponseWriter, r *http.Request) { | ||
| err := r.ParseForm() | ||
| if err != nil { | ||
| s.render(w, http.StatusOK, "error.tmpl.html", errorTmpl, err.Error()) | ||
| return | ||
| } | ||
|
|
||
| exp := r.PostFormValue(expKey) | ||
|
|
||
| form := createMsgForm{ | ||
| Message: r.PostForm.Get(msgKey), | ||
| Pin: r.PostForm.Get(pinKey), | ||
| ExpUnit: r.PostForm.Get(expUnitKey), | ||
| } | ||
|
|
||
| form.CheckField(validator.NotBlank(form.Message), msgKey, "Message can't be empty") | ||
| form.CheckField(validator.NotBlank(form.Pin), pinKey, fmt.Sprintf("Pin must be %d characters long", s.PinSize)) | ||
| form.CheckField(validator.MinChars(form.Pin, s.PinSize), pinKey, fmt.Sprintf("Pin must be %d characters long", s.PinSize)) | ||
| form.CheckField(validator.MaxChars(form.Pin, s.PinSize), pinKey, fmt.Sprintf("Pin must be %d characters long", s.PinSize)) | ||
| form.CheckField(validator.NotBlank(exp), expKey, "Expire can't be empty") | ||
| form.CheckField(validator.IsNumber(exp), expKey, "Expire must be a number") | ||
|
|
||
| expInt, _ := strconv.Atoi(exp) | ||
| form.Exp = expInt | ||
| expDuration := duration(expInt, r.PostFormValue(expUnitKey)) | ||
|
|
||
| form.CheckField(validator.MaxDuration(expDuration, s.MaxExpire), expKey, fmt.Sprintf("Expire must be less than %s", humanDuration(s.MaxExpire))) | ||
|
|
||
| if !form.Valid() { | ||
| data := templateData{ | ||
| Form: form, | ||
| PinSize: s.PinSize, | ||
| } | ||
|
|
||
| s.render(w, http.StatusOK, "home.tmpl.html", mainTmpl, data) | ||
| return | ||
| } | ||
|
|
||
| msg, err := s.Messager.MakeMessage(time.Minute*time.Duration(expInt), form.Message, form.Pin) | ||
| if err != nil { | ||
| s.render(w, http.StatusOK, "secure-link.tmpl.html", errorTmpl, err.Error()) | ||
| return | ||
| } | ||
|
|
||
| msgUrl := fmt.Sprintf("http://%s/message/%s", s.Domain, msg.Key) | ||
|
|
||
| data := struct { | ||
| Url string | ||
| Expire string | ||
| }{ | ||
| Url: msgUrl, | ||
| Expire: msg.Exp.Format("2006-01-02 15:04:05"), | ||
| } | ||
|
|
||
| s.render(w, http.StatusOK, "secure-link.tmpl.html", "secure-link", data) | ||
| } | ||
|
|
||
| // renders the show decoded message page | ||
| func (s Server) showMessageView(w http.ResponseWriter, r *http.Request) { | ||
| key := chi.URLParam(r, keyKey) | ||
|
|
||
| data := templateData{ | ||
| Form: showMsgForm{ | ||
| Key: key, | ||
| }, | ||
| PinSize: s.PinSize, | ||
| } | ||
|
|
||
| s.render(w, http.StatusOK, "show-message.tmpl.html", baseTmpl, data) | ||
| } | ||
|
|
||
| func (s Server) loadMessage(w http.ResponseWriter, r *http.Request) { | ||
| err := r.ParseForm() | ||
| if err != nil { | ||
| s.render(w, http.StatusOK, "error.tmpl.html", errorTmpl, err.Error()) | ||
| return | ||
| } | ||
|
|
||
| form := showMsgForm{ | ||
| Key: r.PostForm.Get("key"), | ||
| Pin: r.PostForm.Get("pin"), | ||
| } | ||
|
|
||
| form.CheckField(validator.NotBlank(form.Pin), "pin", "Pin can't be empty") | ||
| form.CheckField(validator.MinChars(form.Pin, s.PinSize), "pin", fmt.Sprintf("Pin must be %d characters long", s.PinSize)) | ||
| form.CheckField(validator.MaxChars(form.Pin, s.PinSize), "pin", fmt.Sprintf("Pin must be %d characters long", s.PinSize)) | ||
|
|
||
| if !form.Valid() { | ||
| data := templateData{ | ||
| Form: form, | ||
| PinSize: s.PinSize, | ||
| } | ||
|
|
||
| s.render(w, http.StatusOK, "show-message.tmpl.html", mainTmpl, data) | ||
| return | ||
| } | ||
|
|
||
| msg, err := s.Messager.LoadMessage(form.Key, form.Pin) | ||
| if err != nil { | ||
| if errors.Is(err, messager.ErrExpired) || errors.Is(err, store.ErrLoadRejected) { | ||
| s.render(w, http.StatusOK, "error.tmpl.html", errorTmpl, err.Error()) | ||
| return | ||
| } | ||
| log.Printf("[WARN] can't load message %v", err) | ||
| form.AddFieldError("pin", err.Error()) | ||
|
|
||
| data := templateData{ | ||
| Form: form, | ||
| PinSize: s.PinSize, | ||
| } | ||
|
|
||
| s.render(w, http.StatusOK, "show-message.tmpl.html", mainTmpl, data) | ||
|
|
||
| return | ||
| } | ||
|
|
||
| s.render(w, http.StatusOK, "decoded-message.tmpl.html", "decoded-message", string(msg.Data)) | ||
| } | ||
|
|
||
| func duration(n int, unit string) time.Duration { | ||
| switch unit { | ||
| case "m": | ||
| return time.Duration(n) * time.Minute | ||
| case "h": | ||
| return time.Duration(n) * time.Hour | ||
| case "d": | ||
| return time.Duration(n*24) * time.Hour | ||
| default: | ||
| return time.Duration(0) | ||
| } | ||
| } | ||
|
|
||
| func humanDuration(d time.Duration) string { | ||
| switch { | ||
| case d < time.Minute: | ||
| return fmt.Sprintf("%d seconds", d/time.Second) | ||
| case d < time.Hour: | ||
| return fmt.Sprintf("%d minutes", d/time.Minute) | ||
| case d < time.Hour*24: | ||
| return fmt.Sprintf("%d hours", d/time.Hour) | ||
| default: | ||
| return fmt.Sprintf("%d days", d/(time.Hour*24)) | ||
| } | ||
| } |
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