func (e Endpoint) handlerFunc(globalBeforeWM, globalAfterWM DriveMiddleware) func(w http.ResponseWriter, r *http.Request, params map[string]string) {
action := WrapForAction(e.Action)
var localWM DriveMiddleware
var afterWM DriveMiddleware
if e.LocalMW != nil {
localWM = WrapForMW(e.LocalMW)
}
if e.AfterWM != nil {
afterWM = WrapForMW(e.AfterWM)
}
return func(w http.ResponseWriter, r *http.Request, params map[string]string) {
ctx := context.New()
rw := &Request{
Params: Param(params),
Res: NewResponseWriter(w),
Req: r,
}
// Run the global middleware first and recieve its returned values.
if globalBeforeWM != nil {
_, err := globalBeforeWM(ctx, rw)
if err != nil && !rw.Res.DataWritten() {
RenderResponseError(err, rw)
return
}
}
// Run local middleware second and receive its return values.
if localWM != nil {
_, err := localWM(ctx, rw)
if err != nil && !rw.Res.DataWritten() {
RenderResponseError(err, rw)
return
}
}
if err := action(ctx, rw); err != nil && !rw.Res.DataWritten() {
RenderResponseError(err, rw)
return
}
if afterWM != nil {
_, err := afterWM(ctx, rw)
if err != nil && !rw.Res.DataWritten() {
RenderResponseError(err, rw)
return
}
}
if globalAfterWM != nil {
_, err := globalAfterWM(ctx, rw)
if err != nil && !rw.Res.DataWritten() {
RenderResponseError(err, rw)
return
}
}
}
}
// WrapFractalHandler returns a new http.HandlerFunc for recieving http request.
func WrapFractalHandler(handler fractals.Handler) func(http.ResponseWriter, *http.Request, map[string]string) {
return WrapFractalHandlerWith(context.New(), handler)
}