Connection refused - ASP.NET core 7.0 web api call

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Hi All,

I am new to asp.net core 7.0.

I am working on the web api. However I created one controller with [ApiController] decoration. In the launchSettings.json file it shows port number as below :-

"iisSettings": {
  "windowsAuthentication": false,
  "anonymousAuthentication": true,
  "iisExpress": {
    "applicationUrl": "http://localhost:14023",
    "sslPort": 44381
  }

Means that my Web API will be pointing to http://localhost:14023[^]

However when I run the application and navigate to http://localhost:14023[^]
it shows below error :

Quote:
This site can’t be reached
localhost refused to connect.
Quote:
ERR_CONNECTION_REFUSED

And when I hit the same API URL through Postman then below error coming :-

Quote:
Error: connect ECONNREFUSED 127.0.0.1:
Quote:
14023

Can anyone please help on this.

Initially I thought that it could be related to CORS so I added below code in Program.cs file :-

builder.Services.AddCors();

app.UseCors(options =>
options.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader()
);

I am stuck on this.

What I have tried:

I tried adding the CORS in Program.cs class as below :-

<pre>
builder.Services.AddCors();

app.UseCors(options =>
options.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader()
);

Posted 15-Feb-23 23:50pm

Member 11052432

Updated 16-Feb-23 1:26am

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Comments

Richard Deeming 16-Feb-23 6:26am

Have you tried connecting on port 44381 instead? Eg: https://localhost:44381/

Member 11052432 16-Feb-23 6:30am

What does this URL refer?

My Web API URL is http://localhost:14023. I am hitting this URL directly on Browser and Postman.

Richard Deeming 16-Feb-23 6:33am

Your settings specify "sslPort": 44381. If the API is configured to require HTTPS, that's the port you'd need to use; HTTP connections on port 14023 would be rejected.

Member 11052432 16-Feb-23 6:41am

I also tried this as well. Still same issue.

https://localhost:44381/api/member

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Andre Oosthuizen · Answer 1 · 2023-02-16T01:26:00

ASP.NET Core projects are configured to bind to a random HTTP port between 5000-5300 and a random HTTPS port between 7000-7300. This default configuration is specified in the generated
properties/launchSettings.json file and can be overridden. More on this can be found - Configure endpoints for the ASP.NET Core web server [^]

Visual Studio is overriding your port. You can change VS port editing this file Properties\launchSettings.json or else set it by code:

var host = new WebHostBuilder()
            .UseKestrel()
            .UseContentRoot(Directory.GetCurrentDirectory())
            .UseIISIntegration()
            .UseStartup<Startup>()
            .UseUrls("http://localhost:80") // <-----
            .Build();

        host.Run();

Read this solution here - How to change the port number for Asp.Net core app [^]