2021-05-05 10:13:49 -07:00
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---
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id: 587d7fb2367417b2b2512bf8
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title: 從 POST 請求中獲取數據
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challengeType: 2
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forumTopicId: 301511
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dashedName: get-data-from-post-requests
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---
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# --description--
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在路徑 `/name` 掛載一個 POST 處理方法, 和前面一樣, 我們已經在 html 首頁準備了一份表單, 它將提交與練習 10 相同的數據(查詢字符串), 如果 body-parser 正確配置好了,那麼就可以在 `req.body` 對象中找到請求的參數。 來看看一個常規的例子:
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<blockquote>路由:POST '/library'<br>URL 編碼的請求正文:userId=546&bookId=6754<br>req.body:{userId: '546', bookId: '6754'}</blockquote>
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響應和前面一樣的 JSON 對象 `{name: 'firstname lastname'}`。 你可以使用首頁應用提供的 html 表單,來測試你的 API 是否正常工作。
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提示:除了 GET 和 POST,還有其他幾種 http 方法。 按照慣例,http 動詞和在服務端執行的某種操作之間有對應關係, 這種對應關係通常如下:
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POST(有時候是 PUT)- 使用請求發送信息,以創建新資源;
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2021-09-18 11:22:53 -07:00
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GET - 讀取不用修改的已存在的資源;
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2021-05-05 10:13:49 -07:00
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PUT 或者 PATCH(有時候是 POST)- 發送數據,以更新資源;
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2021-09-18 11:22:53 -07:00
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DELETE => 刪除一個資源。
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2021-05-05 10:13:49 -07:00
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還有其他兩種方法常用於與服務進行交互。 除了 GET 之外,上面列出的所有方法都可以負載數據(即數據都能放到消息正文中), 這些方法也可以使用 body-parser 中間件。
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# --hints--
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測試 1:你的 API 接口應該使用正確的名字來響應
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```js
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(getUserInput) =>
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$.post(getUserInput('url') + '/name', { first: 'Mick', last: 'Jagger' }).then(
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(data) => {
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assert.equal(
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data.name,
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'Mick Jagger',
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'Test 1: "POST /name" route does not behave as expected'
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);
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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測試 2:你的 API 接口應該使用正確的名字來響應
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```js
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(getUserInput) =>
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$.post(getUserInput('url') + '/name', {
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first: 'Keith',
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last: 'Richards'
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}).then(
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(data) => {
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assert.equal(
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data.name,
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'Keith Richards',
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'Test 2: "POST /name" route does not behave as expected'
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);
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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# --solutions--
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```js
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/**
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Backend challenges don't need solutions,
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because they would need to be tested against a full working project.
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Please check our contributing guidelines to learn more.
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*/
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```
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