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我正在学习聚合物。我无法计算使用<iron-ajax>. 我正在使用在线测试 API ( https://reqres.in/ ),我应该收到此响应,状态码为 200:

{"token": "QpwL5tke4Pnpja7X"}".

我找不到显示POST示例的教程。过去 24 小时我一直在网上搜索,但一切都是关于GET而不是POST

如果任何熟悉的人都<iron-ajax>可以查看我的代码并帮助我使其工作或弄清楚如何编写正确的代码,这对像我这样的初学者将非常有帮助。

  1. 我的代码与该body属性是否正确?
  2. 响应是200状态码还是令牌?

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    -->
    
    <link rel="import" href="../bower_components/polymer/polymer-element.html">
    <link rel="import" href="shared-styles.html">
    <link rel="import" href="../bower_components/polymer/polymer.html">
    <link rel="import" href="../bower_components/iron-ajax/iron-ajax.html">
    
    <dom-module id="my-view2">
      <!--test using this data: {
          "email": "peter@klaven",
          "password": "cityslicka"
      }-->
      <template>
        <iron-ajax>
            auto 
            method="post"
            url="https://reqres.in/api/login"
            handle-as="json"
            content-type="application/json"
            body =[{"email": "peter@klaven", "password": "cityslicka"}]
            on-response={{handleResponse}}
    
        </iron-ajax>
    
        <!--Handle response-->
        <p> response handling code goes here, how to show the response from the server here?</p>
        <p> It should show: {"token": "QpwL5tke4Pnpja7X"} </p>
        <div>
        <p> {{handleResponse}} </p>
        </div>
      </template>
    
      <script>
        class MyView2 extends Polymer.Element {
          static get is() { return 'my-view2'}; 
    
          static get proporties() {
            return {
              handleResponse: {
                type: Object,
                notify: true,
                readOnly: true 
              }
            };
          }
        }
    
        window.customElements.define(MyView2.is, MyView2);
      </script>
    </dom-module>
    
4

1 回答 1

3
  • 您的 HTML 格式错误(可能是复制粘贴错字?)。的iron-ajax属性应该像这样在开始标签内:

    <iron-ajax
      auto
      method="post"
      ...
    >
    </iron-ajax>
    
  • 您可能打算将handleResponse属性绑定到<iron-ajax>.lastResponse,其中包含对 AJAX 请求的响应。

    <iron-ajax last-response={{handleResponse}} ...>
    

    请注意, 的绑定<p>{{handleResponse}}</p>会将响应对象呈现为[object Object]. 如果您想查看响应内容,则必须使用返回字符串(例如 with )的计算绑定JSON.stringify(),如下所示:

    // <template>
    <p>json(handleResponse)</p>
    
    // <script>
    class XFoo extends Polymer.Element {
      ...
      json(obj) {
        return JSON.stringify(obj);
      }
    }
    
  • 的属性值<iron-ajax>.body应该像这样单引号:

    <iron-ajax body='[{"foo": "bar"}]'>
    

完整的示例应如下所示:

<dom-module id="x-foo">
  <template>
    <iron-ajax
              auto
              method="post"
              url="//httpbin.org/post"
              body='[{"foo": "{{foo}}"}]'
              handle-as="json"
              content-type="application/json"
              last-response="{{lastResponse}}"
              >
    </iron-ajax>
    <pre>[[json(lastResponse)]]</pre>
  </template>
  <script>
    class XFoo extends Polymer.Element {
      static get is() { return 'x-foo'; }

      static get properties() {
        return {
          foo: {
            type: String,
            value: 'bar'
          }
        }
      }

      json(obj) {
        return JSON.stringify(obj, null, 2);
      }
    }
    customElements.define(XFoo.is, XFoo);
  </script>
</dom-module>

演示

于 2017-06-06T04:56:40.443 回答