http发送post请求，却报Reqest Method:OPTIONS的错误

Bertha 。 2022-03-26 05:18 1112阅读 0赞

原来代码如下，报图一的错误：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3JpanU0NzEz_size_16_color_FFFFFF_t_70][]

图一

![20190116092325117.png][]

如上图一,虽然请求返回200,但是没有数据返回,而且请求方式为:Request Method:OPTIONS,并不是post请求方式.为什么会出现这种方式,原来是错误的头信息导致: contentType: 'application/json;charset=utf-8'

将上面的代码改一下就可以:

function cpuTest() {
               $.ajax({
                   url: "http://127.0.0.1:1010/ICC_tsi_api_multi",
                   type: 'post',
                   dataType: "json",
                   data:JSON.stringify(formData),
                   success: function (msgback) {
                       console.log(msgback)
                   },
                   error: function (XMLHttpRequest, status) {
                   }
               });
    
            }

以下代码可以解决跨域问题：

package com.vanke.plat.utils;
    
    
    import org.springframework.stereotype.Component;
    
    import javax.servlet.*;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    
    @Component
    public class SimpleCORSFilter implements Filter {
    
        @Override
        public void init(FilterConfig filterConfig) throws ServletException {
    
        }
        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            HttpServletResponse res = (HttpServletResponse)response;
            res.setHeader("Access-Control-Allow-Origin", "*");
            res.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
            res.setHeader("Access-Control-Max-Age", "3600");
            res.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token");
            chain.doFilter(request, response);
        }
        @Override
        public void destroy() {
    
        }
    
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3JpanU0NzEz_size_16_color_FFFFFF_t_70]: /images/20220326/48dc305a5b8142e188381575dbe9e7a8.png
[20190116092325117.png]: /images/20220326/4504b932a31a4ca587b43638196ddcd4.png