I enabled CORS in my web api application
var cors = new EnableCorsAttribute("*", "*", "*");
config.EnableCors(cors);
All the requests are working fine. but when i pass an object to the post method i get this:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://localhost:44367/api/Users/Create. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).
// WORKING
return axios.post(url)
return axios.get(url)
// NOT WORKING
let model = {
firstName: 'a',
}
return axios.post(url, model);
// or with configuration
let axiosConfig = {
headers: {
'Content-Type': 'application/json;charset=UTF-8',
"Access-Control-Allow-Origin": true,
"Access-Control-Allow-Credentials": true,
}
};
return axios.post(url, model, axiosConfig);
Also posting with postman is working, with the following body
//{
// "model" : {
// "name":"firstName"
// }
//}
i have set a break-point in Application_BeginRequest event and it wont hit.
Controller Action
public ClientResponseModel<User> Create([FromBody]UserAddModel model)
{
///.....
}
Request Header
Host: localhost:44367
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:73.0) Gecko/20100101 Firefox/73.0
Accept: */*
Accept-Language: en,en-US;q=0.5
Accept-Encoding: gzip, deflate
Access-Control-Request-Method: POST
Access-Control-Request-Headers: access-control-allow-credentials,access-control-allow-origin,content-type
Referer: http://localhost:44346/Registration.aspx
Origin: http://localhost:44346
Connection: keep-alive
Response Header
HTTP/1.1 200 OK
Allow: OPTIONS, TRACE, GET, HEAD, POST
Server: Microsoft-IIS/10.0
Public: OPTIONS, TRACE, GET, HEAD, POST
X-SourceFiles: =?UTF-8?B?QzpcVXNlcnNcYWxpLmtcc291cmNlXEF6dXJlXExlYmFuZXNlTGF3c1xDTVNcYXBpXFVzZXJzXENyZWF0ZQ==?=
X-Powered-By: ASP.NET
Date: Mon, 24 Feb 2020 13:56:15 GMT
Content-Length: 0
Any help is really appreciated!
that is typical cors question, read the link below, it may be help you understand why this error occoured.
https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
Technology, browser will block your xhr request when your page domain is not same domain as request url. Your server should response with a header Access-Control-Allow-Origin: <origin of your client page> | *
I ended up adding the following in my web.config to make it work without any custom configuration on axios:
<system.webServer>
<handlers>
<remove name="ExtensionlessUrlHandler-Integrated-4.0"/>
<remove name="OPTIONSVerbHandler"/>
<remove name="TRACEVerbHandler"/>
<add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0"/>
</handlers>
</system.webServer>
I was getting the same error. I allowed cors from both application side and server side. But after searching, i found out there might be region issue so i added proxy url with the original url and it worked for me. Here is a code:
var myHeaders = new Headers();
myHeaders.append("Authorization", "Bearer "+ token);
var requestOptions = {
method: 'GET',
headers: myHeaders,
Vary: 'Origin',
};
const proxyurl = "https://cors-anywhere.herokuapp.com/";
const url = "your url";
fetch(proxyurl + url, requestOptions)
.then(response => response.json())
.then(result => console.log(result))
.catch(error => console.log('error', error));
@Bean
public CorsFilter corsFilter() {
CorsConfiguration corsConfiguration = new CorsConfiguration();
corsConfiguration.setAllowCredentials(true);
corsConfiguration.setAllowedOrigins(Arrays.asList("http://localhost:4200"));
corsConfiguration.setAllowedHeaders(Arrays.asList("Origin", "Access-Control, Allow-Origin", "Content-Type", "Accept", "Authorization", "Origin, Accept", "X-Requested-With", "Access-Control-Request-Method", "Access-Control-Request-Header" )); // this allows all headers
corsConfiguration.setExposedHeaders(Arrays.asList("Origin", "Content-Type", "Accept", "Authorization", "Access-Control-Request-Allow-Origin", "Access-Control-Allow-Credentials"));
corsConfiguration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "DELETE", "OPTIONS"));
UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
urlBasedCorsConfigurationSource.registerCorsConfiguration("/**",corsConfiguration);
return new CorsFilter();
}
I used this and it work fine for me