Comments (2)
Rethink - by creating a separate ComponentHandler
struct and a templ.Handler
function that creates one, it's possible to support adding a status code without having developers deal with middleware.
// ComponentHandler is a http.Handler that renders components.
type ComponentHandler struct {
Component Component
Status int
ErrorHandler http.Handler
}
// ServeHTTP implements the http.Handler interface.
func (ch ComponentHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if ch.Status != 0 {
w.WriteHeader(ch.Status)
}
if err := ch.Component.Render(r.Context(), w); err != nil {
if ch.ErrorHandler != nil {
ch.ErrorHandler.ServeHTTP(w, r)
return
}
http.Error(w, "templ: failed to render template", http.StatusInternalServerError)
}
}
// Handler creates a http.Handler that renders the template.
func Handler(c Component) ComponentHandler {
return ComponentHandler{
Component: c,
}
}
Then, the usage is:
func main() {
data := []Post{{ Name: "templ", Author: "author"}}
http.Handle("/posts", templ.Handler(postsTemplate(data)))
http.ListenAndServe(":8000", nil)
}
And to customise the status code:
func main() {
notFoundHandler := templ.Handler(errorTemplate404())
notFoundHandler.Status = http.NotFound
http.Handle("/404", notFoundHandler)
http.ListenAndServe(":8000", nil)
}
A better signature design for templ.Handler
could make use of the functional options pattern (item 3 at https://golang.cafe/blog/golang-functional-options-pattern.html) to make it possible to set the status without another line.
from templ.
Fixed in e8737b3
from templ.
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