Web API：如何從 HttpContext 讀取動作屬性和參數

Question

在常規課程中，我需要從HttpContext閱讀以下內容：

1. 控制器和動作名稱

2. Action 的屬性（我可以通過HttpActionContext.ActionDescriptor.GetCustomAttributes<type>()獲得它，但在這里我沒有HttpActionContext - 我只有HttpContext ）

3. 讀取參數（如actionContext.ActionArguments["paramName"] ，但同樣 - 我只有一個HttpContext ）

它不是動作過濾器，也不是控制器類。 但是，我可以訪問HttpContext 。

Answer 1

來自asp.net core 3.0 https://stackoverflow.com/a/60602828/10612695

public async Task Invoke(HttpContext context)
{
    // Get the enpoint which is executing (asp.net core 3.0 only)
    var executingEnpoint = context.GetEndpoint();

    // Get attributes on the executing action method and it's defining controller class
    var attributes = executingEnpoint.Metadata.OfType<MyCustomAttribute>();

    await next(context);

    // Get the enpoint which was executed (asp.net core 2.2 possible after call to await next(context))
    var executingEnpoint2 = context.GetEndpoint();

    // Get attributes on the executing action method and it's defining controller class
    var attributes2 = executingEnpoint.Metadata.OfType<MyCustomAttribute>();
}