聚合物铁形PUT方法在url中传递参数

Question

我有一个问题，我想使用带有json数据的PUT方法但是它在查询字符串参数中传递这些参数而不是在json中，我找不到我的错误。如果可能的话，我不想使用'iron-ajax'。

            <form is="iron-form" method="put" action="http://localhost:5000/users/" id="loginForm" content-type="application/json">
              <paper-input name="username" label="Username" required auto-validate></paper-input>
              <paper-input name="password" label="Password" type="password" required auto-validate></paper-input>
              <paper-button raised onclick="_submit(event)" disabled id="loginFormSubmit">
                <paper-spinner id="spinner" hidden></paper-spinner>Submit</paper-button>
              <paper-button raised onclick="_reset(event)">Reset</paper-button>
              <div class="output"></div>
            </form>
            <script>
              loginForm.addEventListener('change', function(event) {
                loginFormSubmit.disabled = !loginForm.validate();
              });
              function _submit(event) {
                spinner.active = true;
                spinner.hidden = false;
                loginFormSubmit.disabled = true;
                Polymer.dom(event).localTarget.parentElement.submit();
              }
              function _reset(event) {
                var form = Polymer.dom(event).localTarget.parentElement
                form.reset();
                form.querySelector('.output').innerHTML = '';
              }
              document.getElementById('loginForm').addEventListener('iron-form-submit', function(event) {
                spinner.active = false;
                spinner.hidden = true;
                loginFormSubmit.disabled = false;
                this.querySelector('.output').innerHTML = JSON.stringify(event.detail);
              });
              document.getElementById('loginForm').addEventListener('iron-form-response', function(response) {
                console.log(response);
              });
            </script>

谢谢大家的帮助！

Answer 1

iron-form仅包含POST个请求正文中的参数。最简单的解决方法是将method="put"更改为method="post"，并为iron-form-presubmit添加处理程序（序列化后触发），将方法更改回PUT。

form.addEventListener('iron-form-presubmit', function() {
  this.request.method = 'put';
});

^codepen