問題描述

使用舊"Dojo，可以將第二個參數 ioargs 傳遞給 Xhr 請求的 load 函數(請參見此處的示例 6).此 ioargs 提供(除其他外)請求的時間戳和狀態代碼.

With the "old" Dojo one could pass a second argument ioargs to the load function of a Xhr request (see Example 6 here). This ioargs provided (among other things) the timestamp and status code of the request.

但是如何使用新的更干凈"(并且向前兼容)Dojo 來實現這一點?
不幸的是，我在 當前文檔中找不到任何提示.

But how can I achieve this with the new and "cleaner" (and forward compatible) Dojo?
Unfortunately, I could not find any hints in the current documentation.

以下應該是上述引用示例到新"Dojo 的移植.但是，ioargs 將是未定義的:

The following should be a port of above referenced example to the "new" Dojo. But, ioargs will be undefined:

require( "dojo/request/xhr", "dojo/dom", "dojo/domReady!",
  function(request, dom){
    // Look up the node we'll stick the text under.
    var targetNode = dom.byId("getLicenseStatus");

    // The parameters to pass to xhrGet, the url, how to handle it, and the callbacks.
    request.get(
      "{{dataUrl}}dojo/LICENSE",
      {
        handleAs: "text",
        preventCache: true
      }
    ).then(
      function(data, ioargs){
        // FIXME: ioargs is undefined
        targetNode.innerHTML = "XHR returned HTTP status: " + ioargs.xhr.status;
      },
      function(error){
        targetNode.innerHTML = "An unexpected error occurred: " + error.response.status + ": " + error.response.text;
      }
    );
  }
);

我需要更改哪些內容才能使請求的時間戳和狀態代碼在加載函數中可用?

What do I need to change to have the request's timestamp and status code available in the load function?

推薦答案

request 返回一個特殊的 promise (來源):

request returns a special promise (source):

從 dojo/request 調用返回的 Promise 有一個標準 Promise 上沒有的附加屬性:response.此屬性是一個承諾，它將解析為更詳細地描述響應的凍結對象(如果可用):

Promises returned from dojo/request calls have an additional property not available on standard promises: response. This property is a promise that will resolve to a frozen object (where available) describing the response in more detail:

• url - 用于發出請求的最終 URL(附加查詢字符串)
• options – 用于發出請求的選項對象
• 文本 - 響應中數據的字符串表示
• data – 響應中處理的數據(如果指定了 handleAs)
• getHeader(headerName) – 從請求中獲取標頭的函數；如果提供者不提供標頭信息，則此函數將返回 null.

因此，您應該將 .then 鏈接到此 promise.response 以訪問所有上述屬性:

So you should chain .then to this promise.response to get access to all the aforementioned properties:

var promise = request.get("{{dataUrl}}dojo/LICENSE");

promise.response.then(function(response) {
    console.log("status", response.status);
    console.log("url", response.url);
    console.log("data", response.data);
});

在 jsFiddle 上查看一個工作示例:http://jsfiddle.net/phusick/6wB2L/

See a working example at jsFiddle: http://jsfiddle.net/phusick/6wB2L/

這篇關于如何檢索 AMD 化 Dojo 的 XHR 響應代碼(+時間戳)?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！