AmbiguousMatchException: The request matched multiple endpoints.
I have an issue when working with Swagger in ASP.NET Core API
When I access https://localhost:5001/swagger/index.html to test my API. I got the issue bellow
Microsoft.AspNetCore.Routing.Matching.AmbiguousMatchException: The request matched multiple endpoints.
Matches: JWTAuthenticationExample.Controllers.ProductsController.GetById (JWTAuthenticationExample)
JWTAuthenticationExample.Controllers.ProductsController.GetByUrlSlag (JWTAuthenticationExample)
at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.ReportAmbiguity(CandidateState[] candidateState)
at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.ProcessFinalCandidates(HttpContext httpContext, CandidateState[] candidateState)
at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.Select(HttpContext httpContext, CandidateState[] candidateState)
at Microsoft.AspNetCore.Routing.Matching.DfaMatcher.MatchAsync(HttpContext httpContext)
at Microsoft.AspNetCore.Routing.Matching.DataSourceDependentMatcher.MatchAsync(HttpContext httpContext)
at Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.Invoke(HttpContext httpContext)
at Microsoft.AspNetCore.HttpsPolicy.HttpsRedirectionMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.Invoke(HttpContext context)
at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
I don't know where my issue comes from. I wanna show Controller and Startup.cs
public class ProductsController : Controller
{
private readonly IProductService _service;
public ProductsController(IProductService service)
{
_service = service;
}
[HttpGet]
public IActionResult Get()
{
return Ok(_service.GetProducts());
}
[HttpGet("/{id}")]
public IActionResult GetById([FromQuery] int id)
{
return Ok(_service.GetProductById(id));
}
[HttpGet("/{urlSlag}")]
public IActionResult GetByUrlSlag([FromQuery] string urlSlag)
{
return Ok(_service.GetProductByUrlSlag(urlSlag));
}
}
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddSwaggerGen();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseSwagger();
app.UseSwaggerUI(action => { action.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1"); });
app.UseHttpsRedirection();
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
Maybe someone can help me resolve this issue
- S-2
Sandeep Kumar Jan 07 2021
You have some mistake when designing API
You have 2 API with the same URL :
GetById
andGetByUrlSlug
The URL of both APIs is
https://localhost:5001/products/xxx
. So when you make a request to this URL. The route didn't know what is the target of the URLYou must change the route of one of them to make sure you have only 1 API per URL
For example:
[HttpGet("GetById/{id}")] public IActionResult GetById([FromQuery] int id) { return Ok(_service.GetProductById(id)); } [HttpGet("GetByUrlSlag/{urlSlag}")] public IActionResult GetByUrlSlag([FromQuery] string urlSlag) { return Ok(_service.GetProductByUrlSlag(urlSlag)); }
The URL will be changed to
https://localhost:5001/products/getbyid/xxx
and
https://localhost:5001/products/getbyurlslag/xxx
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