REXML :: ParseException没有有效的根

Question

当我尝试发出json post请求时出现以下错误:

REXML::ParseException (The document "{\"user\":1,\"email\":\"some@email.com\"}:" does not have a valid root):

不知道从哪里开始.

我的标题看起来像这样:

Accept:application/json, text/javascript, */*; q=0.01
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Connection:keep-alive
Content-Length:38
Content-Type:application/x-www-form-urlencoded
Cookie:_washapp_session=SOME_COOKIE_STRING
Host:myapp.herokuapp.com
Origin:http://myapp.herokuapp.com
Referer:http://myapp.herokuapp.com/user/1/add_friends
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.52 Safari/536.5
X-CSRF-Token:k5bxjBJ3SCMhe1ILfChoiy6qwkYfVsg0JYZV9KDnwIg=
X-Requested-With:XMLHttpRequest

Answer 1

内容类型应该是application/json. Accept仅指定您希望如何返回信息, Content-Type描述您要发送的内容.

您可以使用$ .post指定数据类型:

$.post("http://myapp.herokuapp.com/user/1/add_friends", 
    {user:1, email:"some@email.com"},
    function(data){
        processResponse(data);
    }, 
    "json");