[英]Access to XMLHttpRequest has been blocked by CORS policy in ASP.NET CORE
I tried to make connection from my side client to the API Server with ajax, but I get a error in the response: Access to XMLHttpRequest at ' https://localhost:44381/api/webinars ' from origin ' http://localhost:5003 ' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. I tried to make connection from my side client to the API Server with ajax, but I get a error in the response: Access to XMLHttpRequest at ' https://localhost:44381/api/webinars ' from origin ' http://localhost :5003 '已被 CORS 策略阻止:对预检请求的响应未通过访问控制检查:请求的资源上不存在“Access-Control-Allow-Origin”header。 I tried to edit the CROS policy in the API but I still have the same error.
我试图在 API 中编辑 CROS 策略,但我仍然有同样的错误。 This is my ajax code from MVC:
这是我来自 MVC 的 ajax 代码:
$.ajax({
url: "https://localhost:44381/api/webinars",
type: 'POST',
headers: {
contentType: "application/json",
},
body: JSON.stringify(body),
success: function (data) {
console.log(data);
},
failure: function (err) {
console.log(err);
}
});
StartUp from API:从 API 启动:
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddCors(options =>
{
options.AddPolicy("AllowMyOrigin",
builder => builder.WithOrigins(
"http://localhost:5003/",
"http://apirequest.io")
.WithMethods("POST","GET","PUT")
.WithHeaders("*")
);
});
//code
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
//code
app.UseCors("AllowMyOrigin");
app.UseHttpsRedirection();
app.UseMvc();
}
}
Controller in the API: API 中的 Controller:
[EnableCors("AllowMyOrigin")]
[Route("api/[controller]")]
[ApiController]
public class WebinarsController : ControllerBase
{
// POST: api/Webinars
[HttpPost]
public async Task <ActionResult> PostAsync([FromBody] Item newItem)
{
//code
}
}
Thanks for the answer.感谢你的回答。
you should replace app.UseMvc();你应该替换 app.UseMvc(); with
和
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
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