The 'Access-Control-Allow-Origin' header contains multiple values , but only one is allowed
The 'Access-Control-Allow-Origin' header contains multiple values , but only one is allowed
I got the above error when i call .net core api from backbone js
Here is my code
in start up.cs:
services.AddCors(options =>
options.AddPolicy("CorsPolicy",
builder => builder.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader()
.AllowCredentials());
);
in Configure i do the following:-
app.UseCors("CorsPolicy");
app.UseStaticFiles();
ConfigureAuth(app);
app.UseMvc();
Thanks in advance
I think when you use
.AllowCredentials(), you need to specify domains, can't use .AllowAnyOrigin(). I'm removing backbone because it doesn't have anything to do with the problem, it's a backend issue– T J
Sep 1 at 13:21
.AllowCredentials()
.AllowAnyOrigin()
i fixed the issue. remove header from iis http response headers
– isree
Oct 16 at 13:50
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i try to removing ALL code that enabled CORS and then added the cors settings to the system.webServer node of my Web.Config but issue still exists
– isree
Aug 30 at 12:17