Spring MVC + Zepto POST中的“ Access-Control-Allow-Origin”错误

Question

我正在尝试将JSON对象发布到我的Spring MVC控制器，但是我只收到一个Access-Control-Allow-Origin错误。

我的控制器：

@RequestMapping(value= "/add", method = RequestMethod.POST, headers = {"content-type=application/json"})
public @ResponseBody Reponse addUser(Model model, @RequestBody @Valid @ModelAttribute("user") User user, BindingResult result) {
    if (result.hasErrors()) {
        Reponse error = new Reponse();
        // etc......
        return error;
    } else {
        return service.addUser(user);
    }
}

我的Zepto POST：

this.addUser = function (valeur, callback) {
    $.ajax({
        type: 'POST',
        url: 'http://127.0.0.1:8080/AgenceVoyage/user/add',
        data: JSON.stringify({"mail" : "[e-mail]" , "password" : "titi"}),
        dataType: "json",
        contentType: "application/json",

        success: function(data) {
            if(data.reponse == "OK") {
                window.location = "main.html";
            } else {
                alert("PROBLEM");
            }
        },

        error: function(xhr, type) {
            alert("ERROR");
        }
    });
};

我尝试在POST请求中没有stringify，在中没有标头@RequestMapping。

我的结果：

选项http://127.0.0.1:8080/AgenceVoyage/user/add所请求的资源上不存在“
Access-Control-Allow-Origin”标头。因此，不允许访问源’ http：//
localhost：9000
‘。zepto.min.js：2 XMLHttpRequest无法加载

Answer 1

我找到了解决方案：

首先，创建一个新的过滤器，该过滤器将设置标头响应：

    @Component
public class SimpleCORSFilter implements Filter {

    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
        chain.doFilter(req, res);
    }

    public void init(FilterConfig filterConfig) {}

    public void destroy() {}

}

之后，在您的web.xml中添加以下行：

 <filter>
  <filter-name>cors</filter-name>
  <filter-class>MY.PACKAGE.SimpleCORSFilter</filter-class>
 </filter>

 <filter-mapping>
  <filter-name>cors</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>

而这一切！