我的猜测是我正在处理 IIS 路由问题。

我有一个正在 Visual Studio 中开发的 React/dotnet 核心 3.1 应用程序。加载时，React 应用程序尝试调用应用程序中的 REST 服务来为选择组件（选择组件是公司的下拉列表）拉入数据。

一切都在开发环境中运行良好。当我部署到临时服务器时，所有 API 调用都被重定向到 index.html 并且我从未获得我期望的数据。

我最好的猜测是我在 IIS 7.5 服务器中错误配置了路由，它不知道如何处理对“/api/”的调用

appsettings.json：

{
    "Logging": {
        "LogLevel": {
            "Default": "Information",
            "Microsoft": "Warning",
            "Microsoft.Hosting.Lifetime": "Information"
        }
    },
    "AllowedHosts": "*",
    "ConnectionStrings": {
        DATA REMOVED HERE
    }
}

程序.cs：

public class Program
{
    public static void Main(string[] args)
    {
        CreateHostBuilder(args)
            .Build()
            .Run();
    }

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            });
}

启动.cs：

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.AddControllersWithViews();

        // In production, the React files will be served from this directory
        services.AddSpaStaticFiles(configuration =>
        {
            configuration.RootPath = "ClientApp/build";
        });



        // DI
        services.AddSingleton<IConfiguration>(this.Configuration);

        /*services.Configure<IISServerOptions>(options =>
        {
            options.AutomaticAuthentication = false;
        });*/

    }

    // 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();
        }
        else
        {
            app.UseExceptionHandler("/Error");
            // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            app.UseHsts();
        }

        app.UseHttpsRedirection();
        app.UseStaticFiles();
        app.UseSpaStaticFiles();

        app.UseRouting();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllerRoute(
                name: "default",
                pattern: "{controller}/{action=Index}/{id?}");
        });

        app.UseSpa(spa =>
        {
            spa.Options.SourcePath = "ClientApp";

            if (env.IsDevelopment())
            {
                spa.UseReactDevelopmentServer(npmScript: "start");
            }
        });
    }
}

• 主应用程序的 URL 是： http://vmsaudit.esdev2.elwood.local
• 服务器的 API 调用 URL 为： http://vmsaudit.esdev2.elwood.local/api/Company/er

这是我的公司控制器的代码：

[ApiController]
[Route("api/[controller]")]
public class CompanyController
{
    VMSImportEngineContext db;
    ErecruitContext erdb;
    IConfiguration config;

    public CompanyController (VMSImportEngineContext db, ErecruitContext erdb, IConfiguration config)
    {
        this.db = db;
        this.erdb = erdb;
        this.config = config;
    }

    [HttpGet("{datastore}")]
    public List<Company> Get(string datastore)
    {
        List<Company> ret = new List<Company>();
        if ("ss".Equals(datastore))
        {
            List<int?> vmsClients = db.VmsClient
                .Where(c => c.legacyID != null && c.audit == true)
                .Select(c => c.legacyID)
                .ToList();

            ret = this.GetSSCompanies(vmsClients);
        }
        else // Has to be ERecruit client
        {
            List<int> vmsClients = db.VmsClient
                .Where(c => c.audit == true)
                .Select(c => c.clientid)
                .ToList();

            ret = this.erdb
                .Company
                .Where(c => vmsClients.Contains(c.company_id))
                .ToList();
        }

        return ret; 
    }

    private List<Company> GetSSCompanies(List<int?> vmsClients)
    {
        List<Company> ret = new List<Company>();
        // Generate a linked query
        string connectionString = this.config.GetConnectionString("vmsimportengine");
        SqlConnection connection = new SqlConnection(connectionString);
        if (connection.State != System.Data.ConnectionState.Open)
        {
            connection.Open();
        }
        DbCommand command = connection.CreateCommand();
        command.CommandText = GenSSCompanyQuery(vmsClients);
        DbDataReader reader = command.ExecuteReader();
        while (reader.Read())
        {
            Company company = GetCompanyFromDataRow(reader);
            ret.Add(company);
        }
        return ret;
    }


    private Company GetCompanyFromDataRow(DbDataReader reader)
    {
        Company c = new Company();
        if (!reader.IsDBNull(reader.GetOrdinal("name")))
        {
            c.name = reader.GetString(reader.GetOrdinal("name"));
        }
        if (!reader.IsDBNull(reader.GetOrdinal("company_component_id")))
        {
            int cid = (int)reader.GetDouble(reader.GetOrdinal("company_component_id"));
            // now get the real ID from the current system...
            List<int> potential = this.db.VmsClient
                .Where(c => c.legacyID == cid)
                .Select(c => c.clientid)
                .ToList();
            if (potential.Count > 0)
            {
                c.company_id = potential[0];
            }
        }
        return c;
    }

    private string GenSSCompanyQuery(List<int?> vmsClients)
    {
        // Code Suppressed
    }
}

更新

我决定向我的控制器添加一个新方法，该方法似乎正在返回数据......我的问题显然是在 API URL 调用的末尾传递一个参数？？？这是我刚刚添加到我的控制器中成功返回“pong”的方法

    [HttpGet]
    public string ping()
    {
        return "pong";
    }

总之：

• 此 API URL 有效 - http://vmsaudit.esdev2.elwood.local/api/Company
• 此 API URL 没有 - http://vmsaudit.esdev2.elwood.local/api/Company/ss

唯一的区别是 URL 末尾的参数