如何在 Asp.Net Core 3.0 WebAPI 中启用 CORS
How to enable CORS in Asp.Net Core 3.0 WebAPI
我想通过 Asp.Net Core 3.0 API 项目启用 CORS。这是基本生成的 Asp.Net 核心 Api 模板。一切都是模板的默认设置,除了我从文档中添加了 CORS 设置
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
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.AddControllers();
services.AddCors(opt =>
{
var origins = Configuration
.GetSection("AllowedHosts")
.Get<string[]>();
opt.AddPolicy("CorsPolicy", builder => builder
.WithOrigins(origins)
.AllowAnyMethod()
.AllowAnyHeader()
.Build());
});
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseCors("CorsPolicy");
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
我应该如何设置才能在 .net 核心网络中获得正确的 CORS api?
允许的主机是:
Cors
的优先顺序应该在添加控制器之前。它应该按照官方文档中的定义添加:https://docs.microsoft.com/en-us/aspnet/core/security/cors?view=aspnetcore-3.1
遵循此代码:
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
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("CorsPolicy",
builder => builder.WithOrigins("http://localhost:4200", "http://localhost:44349")
.AllowAnyMethod()
.AllowAnyHeader();
//.AllowCredentials());
});
services.AddControllers();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseCors("CorsPolicy");
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
根据official documentation,必须注意的是:
Specifying AllowAnyOrigin and AllowCredentials is an insecure
configuration and can result in cross-site request forgery. The CORS
service returns an invalid CORS response when an app is configured
with both methods.
我想通过 Asp.Net Core 3.0 API 项目启用 CORS。这是基本生成的 Asp.Net 核心 Api 模板。一切都是模板的默认设置,除了我从文档中添加了 CORS 设置
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
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.AddControllers();
services.AddCors(opt =>
{
var origins = Configuration
.GetSection("AllowedHosts")
.Get<string[]>();
opt.AddPolicy("CorsPolicy", builder => builder
.WithOrigins(origins)
.AllowAnyMethod()
.AllowAnyHeader()
.Build());
});
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseCors("CorsPolicy");
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
我应该如何设置才能在 .net 核心网络中获得正确的 CORS api?
允许的主机是:
Cors
的优先顺序应该在添加控制器之前。它应该按照官方文档中的定义添加:https://docs.microsoft.com/en-us/aspnet/core/security/cors?view=aspnetcore-3.1
遵循此代码:
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
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("CorsPolicy",
builder => builder.WithOrigins("http://localhost:4200", "http://localhost:44349")
.AllowAnyMethod()
.AllowAnyHeader();
//.AllowCredentials());
});
services.AddControllers();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseCors("CorsPolicy");
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
根据official documentation,必须注意的是:
Specifying AllowAnyOrigin and AllowCredentials is an insecure configuration and can result in cross-site request forgery. The CORS service returns an invalid CORS response when an app is configured with both methods.