铁ajax发送编码请求

正如Zikes上面所写的，你必须确保你使用"POST"方法发送它，并将所有JSON放入代码中。

这里可能还需要一件事:JSON.stringify()，这是我解决这个问题的代码+允许动态字段:

        <iron-ajax
        url="https://mandrillapp.com/api/1.0/messages/send.json"
        headers='{"Content-Type": "application/json;charset=utf-8"}' 
        handle-as="json"
        method="POST"
        body='{{ajaxParams}}';></iron-ajax>
<script>
    Polymer({
        is: 'contact-form',
        properties: {
            name: { type:String,    notify: true    },//bind it to <iron-input> fields
            email: {    type:String,    notify: true    },
            msg: {  type:String,    notify: true    },
            ajaxParams: {
                type: String,
                computed: 'processParams(name,email,msg)'
            }
        },
        processParams: function(name,email,msg) {
                    var resp = {
                            "key": "mandrill-api-key",
                            "message": {
                                "from_email": email,
                                "from_name": name,
                                "headers": {
                                    "Reply-To": email
                                },
                                "subject": "subject",
                                "text": msg,
                                "to": [
                                    {
                                        "email": "a@b.c",
                                        "name": "email name",
                                        "type": "to"
                                    }
                                ]
                            }
                        };
                    return JSON.stringify(resp);
        }
     });
</script>

就是这样。

当我通过JSON验证器运行params JSON时，它指出了几个问题:

Parse error on line 3:
...",    "message": ""from_email":"example
----------------------^
Expecting '}', ':', ',', ']'
Parse error on line 3:
...ssage": "from_email": "example@domain.co
-----------------------^
Expecting '}', ',', ']'

此外，看起来Mandrill API在body中期望POST JSON而不是查询字符串。将params更改为body以解决此问题。

<iron-ajax
  headers='{"Content-Type": "application/json;charset=utf-8"}'              
  id="landingPageForm" 
  url="https://mandrillapp.com/api/1.0/messages/send.json" 
  method="POST"
  handle-as="json"
  body='{
    "key": "YOUR API KEY HERE",
    "message": {
      "from_email": "YOUR@EMAIL.HERE",
      "to": [
          {
            "email": "RECIPIENT_NO_1@EMAIL.HERE",
            "name": "RECIPIENT NAME (OPTIONAL)",
            "type": "to"
          },
          {
            "email": "RECIPIENT_NO_2@EMAIL.HERE",
            "name": "ANOTHER RECIPIENT NAME (OPTIONAL)",
            "type": "to"
          }
        ],
      "autotext": "true",
      "subject": "YOUR SUBJECT HERE!",
      "html": "YOUR EMAIL CONTENT HERE! YOU CAN USE HTML!"
    }
  }'></iron-ajax>

以上应该作为一个插入式替换，只需验证JSON主体的任何更改，如http://jsonlint.com/