// EditHandler is a dingo.Handler that edits/saves a given template.
func EditHandler(ctx dingo.Context) {
ctx.ParseForm()
if !CanEdit(ctx) {
ctx.HttpError(401)
return
}
var v View
d := editCtxData(ctx)
if n, ok := ctx.Form["name"]; !ok {
editTempl.Execute(ctx.Response, d)
return
} else if v, ok = editableViews[n[0]]; !ok {
d.Error = errors.New(fmt.Sprintf("Template name: `%s` does not exist.", n[0]))
editTempl.Execute(ctx.Response, d)
return
}
if ctx.Method == "POST" {
d.IsAction = true
c := []byte(ctx.FormValue("content"))
if err := v.Save(ctx, c); err != nil {
d.Error = err
d.Content = c
} else {
d.WasSaved = true
d.Content = []byte(v.Data(ctx))
}
} else {
d.Content = []byte(v.Data(ctx))
}
editTempl.Execute(ctx.Response, d)
}
// Execute invokes a view by key.
func Execute(ctx dingo.Context, key string, data interface{}) {
if v, ok := viewCol[key]; !ok {
ctx.HttpError(404)
} else if err := v.Execute(ctx, data); err != nil {
// TODO log this somewhere
log.Println("dingo: template execution error, ", err)
/* This will cause a warning to be logged from `net/http/server.go`.
* The headers have, most likely, been written to the stream. The error is
* occuring midway through template processing, which is writing to the response stream.
* Server.go logs this; if we don't call the error handler below, then the stream is cut-off
* with no other warning to the client, with this they at-least get the 500 template.
*/
ctx.HttpError(500)
}
}
func JSONHandler(fn Handler, ctx dingo.Context) {
var (
enc encoder
callback string
)
ct := ctx.Header.Get("Accept")
ct, _, _ = mime.ParseMediaType(ct)
switch ct {
default:
ct = "application/json"
callback = ctx.URL.Query().Get("callback")
if len(callback) > 0 {
ct = "application/javascript"
}
enc = json.Marshal
case "application/json":
enc = json.Marshal
case "application/xml":
enc = xml.Marshal
}
ctx.Response.Header().Set("Content-Type", ct)
status, o := fn(ctx)
ctx.Response.WriteHeader(status)
if o == nil && len(callback) < 1 {
return
}
data, err := enc(o)
if err != nil {
ctx.HttpError(http.StatusInternalServerError)
return
}
if len(callback) > 0 {
data = pad(data, callback)
}
ctx.Response.Write(data)
}