如何处理 dot net core web api 中的 OPTION 标头 [英] How to handle OPTION header in dot net core web api

问题描述

在使用 ajax 调用测试我的 dot net core web api 时，当我使用 fiddler 进行监控时，chrome 将我的 get 替换为请求标头中的 Option.我按照这里的代码 Enable OPTIONS header for CORS on .NET Core Web API，但仍然无法正常工作.我如何实现这一目标?这是我的启动文件

While testing my dot net core web api with ajax call, chrome replaces my get with Option in the request header when i monitor with fiddler. I followed the code here Enable OPTIONS header for CORS on .NET Core Web API and still not working. How do I achieve this? Here is my start up file

public void ConfigureServices(IServiceCollection services)
{
    services.Configure<CookiePolicyOptions>(options =>
    {
        options.CheckConsentNeeded = context => true;
        options.MinimumSameSitePolicy = Microsoft.AspNetCore.Http.SameSiteMode.None;
    });

    services.AddCors(options => options.AddPolicy("AllowCors", p => 
        p.AllowAnyOrigin().AllowAnyMethod().AllowCredentials().AllowAnyHeader()));

    services.Configure<IISOptions>(options =>
    {
        options.ForwardClientCertificate = false;
    });

    services.AddMvc()
        .SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseExceptionHandler("/Home/Error");
        app.UseHsts();
    }

    app.UseOptions();
    app.UseCors("AllowCors");
    app.UseDefaultFiles();
    app.UseStaticFiles();
    app.UseCookiePolicy();
    app.UseHttpsRedirection();

    app.UseMvc(routes =>
    {
        routes.MapRoute(name: "default", template: "{controller=Account}/{action=Login}/{id?}");
    });
}

推荐答案

这应该启用 OPTION 标头

This should enable OPTION header

          app.UseCors(builder => builder.WithOrigins("http://example.com")
          .AllowAnyHeader()
          .AllowAnyMethod()
          .AllowCredentials());

如果您不想启用任何标头/方法或凭据，则适合您的需求.

fit it to your needs if you do not want to enable any header / method or credentials.

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