jQuery的AJAX返回的数据:JSON和HTML混?

问题描述:

我有这样的Ajax请求从我的服务器获取数据,而的dataType 总是 HTML 默认。但有时它会从服务器返回JSON,所以我要检查,如果返回的数据是HTML然后执行一个其他执行B.这可能吗?

I have this ajax request to get the data from my server, and the dataType is always html by default. But sometimes it would return json from the server, so I want to check if the returned data is html then execute A else execute B. Is it possible?

我的jQuery,

 $.ajax({
     type: "GET",
     dataType: "html",
     url: request_url,
     context: $('#meat'),
     async: true,
     beforeSend: function () {},
     success: function (returndata, status, jqXHR) {
         if ($.parseJSON(returndata) === false) A;
         else B.
     }
 });

在返回的数据是我得到这个错误 HTML

I get this error when the returned data is html,

语法错误:JSON.parse:意外的字符

SyntaxError: JSON.parse: unexpected character

那么,如何可以让这个code 多功能

So how can I make this code versatile?

我不知道是否有更好的办法,但你可以使用try ... catch

I'm not sure if there is a better way, but you could try... catch

$.ajax({
      type:       "GET",
      url:        request_url,
      context:    $('#meat'),
      async:      true,
      beforeSend: function() {
      },
      success: function (returndata, status, jqXHR) {
        var parsed;
        try
        {
            parsed = $.parseJSON(returndata);
            // Execute B
        }
        catch(e)
        {
           // treat as html then
           // do parsing here
           parsed = returnData;
           // Execute A
        }
      }

});