Grails:request.JSON 来自哪里，我如何使用 jQuery's .ajax() 或 .post() 将东西放在那里? [英] Grails: where does request.JSON come from, and how do I put things there with jQuery's .ajax() or .post()?

问题描述

我有一个控制器，它在 ?request body? 中接受一些 json 并用它做了很棒的事情:

I have a controller that takes some json in the ?request body? and does awesome things with it:

def myController(){
  def myAction(){
    println "Here is request.JSON: ${request.JSON as JSON}"
    println "Here is params: $params"
    //do awesome stuff with request.JSON only
    return
  }
}

所以我可以像这样用 cURL 打这个:

So I can hit this with cURL like so:

curl -i -H "content-type: application/json" -d "{\"someVariable\":\"Absolutely\"}"

我的 grails 控制器打印:

And my grails controller prints:

Here is request.JSON: {"someVariable":"Absolutely"}
Here is params: [controller:'myController', action:'myAction']

到目前为止一切都很好，但是当我尝试使用 jQuery 执行此操作时，它会出现在参数中！！！

So far so good, but when I try to do this with jQuery it goes in params!!!

看完这两个问题:使用 jQuery 将 POST-body 设置为 JSON 对象

jQuery 在请求正文中发布有效的 json

我对如何编写 .js 的最佳猜测是:

My best guess for how to write the .js is:

var sendMe = {"someVariable":"Absolutely"}
$.ajax({
  url: '/myController/myAction',
  type: 'POST',
  processData: false,
  data: JSON.stringify(sendMe),
  dataType: 'json',
  success: function(data) {

  },
  error: function(request, status, error) {

  }                     
});

但是当我这样做时，我的控制器会打印:

But when I do this my controller prints:

Here is request.JSON: {}
Here is params: [{"someVariable":"Absolutely"}:, controller:'myController', action:'myAction']

我一定是用 jQuery 做错了什么.

I must be doing something wrong with jQuery.

更新:看起来这个白痴实际上有同样的问题:如何在 grails 2.0 中获取 JSON 但他没有面对 jQuery 问题，而是使用了 cURL 和 reqeust.JSON 的东西.真是个懒人.

UPDATE: looks like this idiot was actually having the same problem: How to get at JSON in grails 2.0 but instead of confronting the jQuery issue he just used cURL and the reqeust.JSON thing. What a lazy guy.

推荐答案

我前几天也遇到和你一样的问题.

I have the same trouble like you few days ago.

对我来说 - 解决方案是使用 jQuery.ajaxSetup 来设置 ajax 内容类型的默认值.

For me - the solution was to use jQuery.ajaxSetup to set the default value for ajax content type.

$(function() {
    $.ajaxSetup({
        contentType: "application/json; charset=utf-8"
    });
}

有了这个，您可以使用 $.ajax 或 $.post 将您的 JSON 传输到控制器并像这样使用它:

With this you could use $.ajax or $.post to transfer your JSON to the controller and use it like that:

def yourJSON = request.JSON

我不知道为什么在我的测试过程中忽略了 $.ajax 和 $.post 中的 'contentType' 选项.

I dont't know why the 'contentType' option within $.ajax and $.post was ignored during my tests.

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