我也遇到过类似的问题，但没有一个解决我的问题。我正在Web服务器上运行javascript应用程序，该应用程序应访问另一个子域中的URL。浏览器是Chrome浏览器，并且CORS始终存在，阻止了我的Ajax请求的正确执行。
我正在从fiorisandbox.example.com网站发送POST请求，以从citrixtest.example.com获取数据。当我使用Citrix特定标头时，我希望有一个预检请求。由于404未找到错误，此预检请求永远不会成功。控制台中的详细信息显示了CORS问题：
XHRInterceptor-dbg.js:63 Access to XMLHttpRequest at https://citrixtest.example.com/Citrix/UATWeb/Home/Configuration from origin https://fiorisandbox.example.com has been blocked by CORS policy: Response to preflight request doesn't pass access control check: It does not have HTTP ok status.
请求的详细信息是：
Request URL: https://citrixtest.example.com/Citrix/UATWeb/Home/Configuration
Request Method: OPTIONS
Status Code: 404 Not Found
Remote Address: XX.XX.XX.XX:443
Referrer Policy: no-referrer-when-downgrade
Access-Control-Allow-Headers: *
Access-Control-Allow-Methods: POST, GET, OPTIONS
Access-Control-Allow-Origin: *
Provisional headers are shown
Access-Control-Request-Headers: x-citrix-isusinghttps
Access-Control-Request-Method: POST
Origin: https://fiorisandbox.example.com
Referer: https://fiorisandbox.example.com/sap/bc/ui5_ui5/sap/zopencitrix/index.html?sap-client=100&sap-ui-language=EN&sap-ui-xx-devmode=true
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, …