CORS sync sends OPTIONS request instead of POST

Question

I'm trying to use the POST API Call in Angular Component . I got the following request headers which are far from my expectations:   Here is a code:   postAccount(occount:OAccount){ var body=JSON.stringify(oaccount); var headerOptions=new Headers({'Content-Type':'application/json'}); var requestOptions=new RequestOptions({method:RequestMethod.Post,headers:headerOptions,withCredentials:true}) return this.http.post(this.API_ENDPOINT + 'OAccount',body,requestOptions).map(x=>x.json()); }   Request URL:http://localhost:5000/api/Account Request method:OPTIONS Remote address:07.0.0.0:0000 Status code: 401 Version:HTTP/1.1 Referrer Policy:no-referrer-when-downgrade Response headers (390 B) Raw headers Cache-Control private Content-Length 6143 Content-Type text/html; charset=utf-8 Date Wed, 31 Jul 2019 17:04:16 GMT Server Microsoft-IIS/10.0 WWW-Authenticate Negotiate WWW-Authenticate NTLM X-Powered-By ASP.NET X-SourceFiles =?UTF-8?B?QzpcVXNlcnNcMzUxNzU2…2lvblxhcGlcT3NhQWNjb3VudA==?= Request headers (417 B) Raw headers Accept */* Accept-Encoding gzip, deflate Accept-Language en-US,en;q=0.5 Access-Control-Request-Headers content-type Access-Control-Request-Method POST Connection keep-alive Host localhost:5000 Origin http://localhost:4000 Referer http://localhost:4000/accounts User-Agent Mozilla/5.0 (Windows NT 10.0; …) Gecko/20100101 Firefox/68.0

Madan Shekar · Answer

if you are getting status code 401 means authentication issue. please check with your api like any token need to be pass in a header .