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如何在中访问服务器变量ASP.Net核心2.x

asp.net-core asp.net c#

Ahmer Ali Ahsan · 技术社区 · 6 年前

我正在使用ASP.Net核心2.0 web应用程序,它部署在Azure上。我需要做的是得到客户端IP地址。为此,我在互联网上搜索,发现服务器变量对我有帮助。

所以我从 here 要使用以下方法获取客户端IP:

string IpAddress = this.Request.ServerVariables["REMOTE_ADDR"];

但是当我尝试上面的代码时,它显示一个错误“HttpRequest不包含服务器变量的定义”

var ip0 = HttpContext.Features.Get<IHttpConnectionFeature>()?.RemoteIpAddress;

代码定义

发出请求的客户端的IP地址。注意这可能是针对代理而不是最终用户。

上面的代码是获取IP地址,但它不是clientip,每次我通过controller访问上面的代码时,它都会刷新IP。也许这是一个Azure web服务代理,每次都会发出get请求。

2 回复 | 直到 4 年前

davidfowl 6 年前

https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.http.httpcontext.connection?view=aspnetcore-2.1

https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.http.connectioninfo.remoteipaddress?view=aspnetcore-2.1#Microsoft_AspNetCore_Http_ConnectionInfo_RemoteIpAddress

Peter Csala Matheus Robert Lichtnow 4 年前

我发现马克G的参考链接非常有用。

我已经将中间件配置为 ForwardedHeadersOptions X-Forwarded-For X-Forwarded-Proto Startup.ConfigureServices .

这是我的代码文件:

配置服务

public void ConfigureServices(IServiceCollection services)
{
    services.AddDbContext<ApplicationDbContext>(options =>
           options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

    services.AddIdentity<ApplicationUser, IdentityRole>()
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddDefaultTokenProviders();

    services.AddIdentityServer()
            .AddDeveloperSigningCredential()
            .AddInMemoryPersistedGrants()
            .AddInMemoryIdentityResources(Config.GetIdentityResources())
            .AddInMemoryApiResources(Config.GetApiResources())
            .AddInMemoryClients(Config.GetClients())
            .AddAspNetIdentity<ApplicationUser>();

    services.AddCors(options =>
    {
        options.AddPolicy("AllowClient",
                   builder => builder.WithOrigins("http://**.asyncsol.com", "http://*.asyncsol.com", "http://localhost:10761", "https://localhost:44335")
                                  .AllowAnyHeader()
                                  .AllowAnyMethod());
    });

    services.AddMvc();
    /* The relevant part for Forwarded Headers */
    services.Configure<ForwardedHeadersOptions>(options =>
    {
        options.ForwardedHeaders =
            ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
    });

    services.AddAuthentication(options =>
    {
        options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
        options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
    })
    .AddJwtBearer(options =>
    {
        // base-address of your identityserver
        //options.Authority = "http://server.asyncsol.com/";
        options.Authority = "http://localhost:52718/";

        // name of the API resource
        options.Audience = "api1";

        options.RequireHttpsMetadata = false;
    });
}

配置

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    /* The relevant part for Forwarded Headers */
    app.UseForwardedHeaders();
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    app.UseIdentityServer();
    app.UseAuthentication();
    app.UseCors("AllowAll");
    app.UseMvc(routes =>
    {
        routes.MapRoute(
            name: "areas",
            template: "{area:exists}/{controller=Home}/{action=Index}/{id?}"
        );
        routes.MapRoute(
            name: "default",
            template: "{controller=Home}/{action=Index}/{id?}");
    });
}

public IEnumerable<string> Get()
{
    string ip = Response.HttpContext.Connection.RemoteIpAddress.ToString();

    //https://en.wikipedia.org/wiki/Localhost
    //127.0.0.1    localhost
    //::1          localhost
    if (ip == "::1")
    {
        ip = Dns.GetHostEntry(Dns.GetHostName()).AddressList[2].ToString();
    }

    return new string[] { ip.ToString() };
}

所以,如果我在本地主机环境中运行,它会显示我的IPv4系统IP地址。
如果我在azure上运行我的服务器,它会显示我的主机名/IP地址。

结论:

Forwarded Headers Middleware