This is my startup.cs file
Does anyone know whats going wrong This is my index.cshtml
Alright so my code will be below its very basic startup.cs file and a index.cshtml file with some basic code just for testing
public class Startup
{
// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
public void ConfigureServices(IServiceCollection services)
{
services.AddRazorPages();
}
// 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");
app.UseHsts();
}
app.UseStaticFiles();
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapRazorPages();
});
}
}}
#page
#DateTime.Now
Try to create a new project and check whether you have the same problem.
And did you apply something to your service side? You can share it.
Or you can try these code first:
ConfigureServices:
services.AddMvc(options =>
{
options.EnableEndpointRouting = false;
});
Configure:
app.UseMvcWithDefaultRoute();
Related
While in VS2019 Debugging (IIS Express) an API service and web application using the service I receive "Access to XMLHttpRequest at 'theservice' from origin 'apporigin' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource".
Startup Methods
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddCors();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
app.UseCors(options => {
options.AllowAnyOrigin();
});
}
Controller Class and Get Method both have the [EnableCors()] attribute.
To me, this seems correct however I continue to receive the missing origin header message. Am I implementing CORS correctly in this case?
UseCors must be called in proper order. It must be placed after UseRouting, but before UseAuthorization. You can refer this document.
Not every middleware needs to go in this exact order, but many do. For example:
UseCors, UseAuthentication, and UseAuthorization must go in the order shown.
UseCors currently must go before UseResponseCaching due to this bug.
https://stackoverflow.com/users/6527049/vivek-nuna has the answer in Comments.
move app.UseCors(options => {options.AllowAnyOrigin();}); to after app.UseRouting() and before app.UseAuthorization()
The correct Configure Method looks like this:
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseCors(options => {
options.AllowAnyOrigin();
});
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
I have created a .NET Core 3.1 WebAPI application which connect with Azure Cosmos Db. The WebAPI is returning data from CosmosDb correctly. When I tried to integrate OData to this solution, and tried to query data using the Select method, it does not return expected result.
The following are my code:
StartUp.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.AddOData();
services.AddControllersWithViews();
services.AddSingleton<ICosmosDbService>(InitializeCosmosClientInstanceAsync(Configuration.GetSection("CosmosDb")).GetAwaiter().GetResult());
}
// 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("/Home/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.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=ToDo}/{action=Index}/{id?}");
endpoints.EnableDependencyInjection();
endpoints.Select().Filter().OrderBy().Expand();
});
}
}
WebAPI controller:
[Produces("application/json")]
[Route("api/[controller]")]
[ApiController]
public class ItemsController : ControllerBase
{
private readonly ICosmosDbService _cosmosDbService;
public ItemsController(ICosmosDbService cosmosDbService)
{
_cosmosDbService = cosmosDbService;
}
// GET: api/<ItemsController>
[HttpGet]
[EnableQuery()]
public async Task<IEnumerable<Item>> Get()
{
return await _cosmosDbService.GetItemsAsync("SELECT * FROM c");
}
}
When I try to retrieve data using the API call(https://localhost:44357/api/items), I am getting expected result:
[{"id":"5f4f5d02-9217-4591-8f8c-2af9fe7d9ae4","name":"Brush","description":"Brush your teeth every night","completed":true,"partitionKey":null},{"id":"6a5edfe3-9c84-4398-bed4-963dbb4a42e3","name":"Excercise","description":"Hit the gym in the evening","completed":true,"partitionKey":null}]
But when I try to use the OData method(https://localhost:44357/api/items?$select=name), I am not getting expected result. Instead, I am getting this:
[{"instance":null,"container":{},"modelID":"7c0ae376-1666-46f8-886f-9bf758824063","untypedInstance":null,"instanceType":null,"useInstanceForProperties":false},{"instance":null,"container":{},"modelID":"7c0ae376-1666-46f8-886f-9bf758824063","untypedInstance":null,"instanceType":null,"useInstanceForenter code hereProperties":false}]
Any idea why it is like this?
There is incompatible situation with the JSON serializer in Asp.Net 3.1. Try to AddNewtonsoftJson.
services.AddControllers(mvcOptions =>
mvcOptions.EnableEndpointRouting = false)
.AddNewtonsoftJson();
I just created a new .NET Core 3.1 Web API project based by the template in VS 2019, and I added code following the official example in startup.cs like this:
public void ConfigureServices(IServiceCollection services)
{
services.AddResponseCompression();
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
app.UseResponseCompression();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
but the compression middleware does not work
webapi response in browser
.Net Core Response Compression is disabled by default for HTTPS traffic, which it appears you are using. Try changing your call to AddResponseCompression() to turn it on for https.
services.AddResponseCompression(options =>
{
options.EnableForHttps = true;
});
You can see the MS docs for use of response compression with https, as there are security implications noted in the article. https://learn.microsoft.com/en-us/aspnet/core/performance/response-compression?view=aspnetcore-3.1#compression-with-secure-protocol
I'm in the process of learning Asp.Net Core Identity along with Identity Server 4. So far I have got my User authenticated against IdS4, then I can get a token to use access my API, this all works as expected, however I always need to create my Authorization Attributes on my API controller with a specified AuthenticationScheme parameter, even though I specify it my API's Config.cs (according to several sources/guides I have read).
This is my API's Config.cs, I have left the different attempts commented out. Each version hasn't has any effect, occasionally a 500 error instead of a 401, but that will be down to me doing something very wrong!
Config.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<ApplicationCoreDbContext>(opt => opt.UseInMemoryDatabase("TestItem"));
services
.AddMvc();
services
//.AddAuthentication(cfg =>
//{
// cfg.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
// cfg.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
//})
.AddAuthentication(IdentityServerAuthenticationDefaults.AuthenticationScheme)
//.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
.AddIdentityServerAuthentication(options =>
{
options.Authority = "https://localhost:5001";
options.RequireHttpsMetadata = false;
options.ApiName = "web_api";
options.EnableCaching = true;
options.CacheDuration = TimeSpan.FromMinutes(10);
});
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthorization();
app.UseAuthentication();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
Here is a sample endpoint from my API Controller. In it's current state it works fine, however I believe I shouldn't need to specify the AuthenticationSchemes, but if I remove it, I always get a 401 error. Does anyone have any suggestions on what I'm missing?
API Controller
// GET: api/TestItems
[HttpGet]
//[Authorize]
[Authorize(AuthenticationSchemes = "Bearer")]
public async Task<ActionResult<IEnumerable<TestItemDto>>> GetTestItems()
{
//SNIP
}
Issue is because of order of middleware added in the Startup.Configure method. Proper order is critical for security. Read more here.
In this case you move app.UseAuthorization() to be after app.UseAuthentication(). The code would be like:
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
So to setup endpoint routing in asp.net core 3.x, we do something like this
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
//...
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
endpoints.MapRazorPages();
});
}
How/where can we define a "default" page route other than index?
The easiest solution would be to manually add route to the custom page in ConfigureServices
public void ConfigureServices(IServiceCollection services)
{
services.AddRazorPages(o => o.Conventions.AddPageRoute("/CustomPage", ""));
}
With this solution you need to rename or remove Index page to avoid AmbiguousMatchException
This is an example of a default route.
app.UseEndpoints(endpoint =>
{
endpoint.MapDefaultControllerRoute();
});