問題描述

使用舊"Dojo，可以將第二個(gè)參數(shù) ioargs 傳遞給 Xhr 請(qǐng)求的 load 函數(shù)(請(qǐng)參見此處的示例 6).此 ioargs 提供(除其他外)請(qǐng)求的時(shí)間戳和狀態(tài)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(shí)現(xiàn)這一點(diǎn)?
不幸的是，我在 當(dāng)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(yīng)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(nèi)容才能使請(qǐng)求的時(shí)間戳和狀態(tài)代碼在加載函數(shù)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(gè)特殊的 promise (來源):

request returns a special promise (source):

從 dojo/request 調(diào)用返回的 Promise 有一個(gè)標(biāo)準(zhǔn) Promise 上沒有的附加屬性:response.此屬性是一個(gè)承諾，它將解析為更詳細(xì)地描述響應(yīng)的凍結(jié)對(duì)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(fā)出請(qǐng)求的最終 URL(附加查詢字符串)
• options – 用于發(fā)出請(qǐng)求的選項(xiàng)對(duì)象
• 文本 - 響應(yīng)中數(shù)據(jù)的字符串表示
• data – 響應(yīng)中處理的數(shù)據(jù)(如果指定了 handleAs)
• getHeader(headerName) – 從請(qǐng)求中獲取標(biāo)頭的函數(shù)；如果提供者不提供標(biāo)頭信息，則此函數(shù)將返回 null.

因此，您應(yīng)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(gè)工作示例:http://jsfiddle.net/phusick/6wB2L/

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

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