Protect changing in parallel using HTTP 412 precondition failed

examples/base/main.go

@@ -116,12 +116,6 @@ func main() {
 		Priority: 999, // execute as latest as possible to allow users to provide their own route
 	})
 
-	app.OnRecordViewRequest().BindFunc(addLastModified)
-
-	app.OnRecordUpdateRequest().BindFunc(ifUnmodifiedSince)
-
-	app.OnRecordDeleteRequest().BindFunc(ifUnmodifiedSince)
-
 	if err := app.Start(); err != nil {
 		log.Fatal(err)
 	}
@@ -135,33 +129,3 @@ func defaultPublicDir() string {
 
 	return filepath.Join(os.Args[0], "../pb_public")
 }
-
-func addLastModified(e *core.RecordRequestEvent) error {
-	updated := e.Record.GetString("updated")
-
-	if updated != "" {
-		e.Response.Header().Add("Last-Modified", updated)
-	}
-
-	return e.Next()
-}
-
-func ifUnmodifiedSince(e *core.RecordRequestEvent) error {
-	updated := e.Record.GetString("updated")
-
-	if updated != "" {
-		header := e.Request.Header.Get("If-Unmodified-Since")
-
-		if header == "" || header != updated {
-			e.Response.Header().Add("Last-Modified", updated)
-
-			if header == "" {
-				return e.Error(http.StatusPreconditionRequired, "Header If-Unmodified-Since is required", nil)
-			} else if header != updated {
-				return e.Error(http.StatusPreconditionFailed, "Record was modified after retrieval", nil)
-			}
-		}
-	}
-
-	return e.Next()
-}