Can't find route to Downstream API

[PaybackMan]

Hi,

Having an issue with Ocelot routing to downstream API. Appreciate any help.

APIs used in test

Upstream API : https://localhost:7003;http://localhost:5003 Downstream API : https://localhost:3001;http://localhost:3000

Using .Net 6

The Exception

requestId: 0HMJFT6TRQ7L7:00000002, previousRequestId: no previous request id, message: Upstream url path is /Carriers

warn: Ocelot.DownstreamRouteFinder.Middleware.DownstreamRouteFinderMiddleware[0] requestId: 0HMJFT6TRQ7L7:00000002, previousRequestId: no previous request id, message: DownstreamRouteFinderMiddleware setting pipeline errors. IDownstreamRouteFinder returned Error Code: UnableToFindDownstreamRouteError Message: Failed to match Route configuration for upstream path: /Carriers, verb: POST. warn: Ocelot.Responder.Middleware.ResponderMiddleware[0] requestId: 0HMJFT6TRQ7L7:00000002, previousRequestId: no previous request id, message: Error Code: UnableToFindDownstreamRouteError Message: Failed to match Route configuration for upstream path: /Carriers, verb: POST. errors found in ResponderMiddleware. Setting error response for request path:/Carriers, request method: POST dbug: Ocelot.Errors.Middleware.ExceptionHandlerMiddleware[0] requestId: 0HMJFT6TRQ7L7:00000002, previousRequestId: no previous request id, message: ocelot pipeline finished

Upstream Setup (Ocelot installed here)

using Microsoft.AspNetCore.Authentication.JwtBearer; using Microsoft.Identity.Web; using Ocelot.DependencyInjection; using Ocelot.Middleware;

var builder = WebApplication.CreateBuilder(args);

builder.Logging.ClearProviders(); builder.Logging.AddConsole();

var environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT"); builder.Configuration.SetBasePath(Directory.GetCurrentDirectory() + "\Configuration") .AddJsonFile("ocelot." + environment + ".json", false, true) .AddJsonFile("appsettings." + environment + ".json") .AddEnvironmentVariables();

Console.WriteLine("Setting up Reverse Proxy");

builder.Services.AddOcelot(builder.Configuration); var app = builder.Build();

app.UseOcelot().Wait();

app.Run();

ocelot.local.json : Note I've used the Reroutes and Route element, both failed.

{ "ReRoutes": [ {
"DownstreamPathTemplate": "/api/{everything}", "DownstreamScheme": "https", "DownstreamHostAndPorts": [ { "Host": "localhost", "Port": 3001 } ], "UpstreamPathTemplate": "/{everything}",
"UpstreamHttpMethod": [ "Post" ] }, ], "GlobalConfiguration": { "BaseUrl": "https://localhost:7003",
} }

Downstream API Controller

[Route("api/[controller]")]
[ApiController]
public class CarrierAdminController : BaseController
{ 
    [HttpGet("Carriers")]
    public async Task<IEnumerable<CarrierSDK.Carrier>> GetCarriersAsync()
    {
      // etc etc
    }       
}

HttpRequestMessage sent to Upstream API from test.

AbsoluteUri "https://localhost:7003/Carriers"

[PaybackMan]

Found the issue. Downstream API was using Get verb, ocelot route used Post. I'm blind....

[ks1990cn]

Please close this issue if resolved!

[arjuqwi]

hi

[raman-m]

@PaybackMan commented on Jul 27, 2022

Resolved by the author. You must use "Routes" instead of "ReRoutes" in JSON!!!