How do I make CORS request to localhost web api

Question

0.00/5 (No votes)

See more:

Hi All,

I am using MVC 4 application with angular js and calling Web API hosted on another url.
Both are my localhost but port are different.

Web API:

C#

[HttpPost]
        public int SaveClient(TB_Client client)
        {
ClientManager cmObj = new ClientManager();
            return cmObj.AddModifyClient(client);
        }

Web API config file:

XML

<system.webServer>
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*"/>
        <add name="Access-Control-Allow-Headers" value="Content-Type" />
        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />
      </customHeaders>
    </httpProtocol>
</system.webSerer>

MVC application that calling this web api:

JavaScript

$http.post('http://localhost:54212/api/Client/SaveClient', $scope.ClientObj).success(function (data, status, header, config) {
                    alert('Client added');
                }).
                error(function () {
                    alert("error");
                });

But I still getting the error:

XMLHttpRequest cannot load http://localhost:54212/api/Client/SaveClient. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:52298' is therefore not allowed access. The response had HTTP status code 405.

Please guide me where I am lacking.
Thanks :)

Posted 14-Nov-15 2:52am

Manish Kumar Namdev

Updated 4-Apr-16 15:33pm

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

George Jonsson · Answer 1 · 2015-11-14T16:20:00

Solution 1

Not sure what kind of setup you have, but maybe these articles can help you.

I want to add CORS support to my server[^]

HTML5 Rocks: Using CORS[^]

Posted 14-Nov-15 16:20pm

George Jonsson

Member 1656214 · Answer 2 · 2016-04-04T15:33:00

It seems you need to Enable Cross-Origin Requests in ASP.NET Web API 2.

1) If you're using Visual Studio, then you can easily install the following Nuget package through Package Manager Console

Install-Package Microsoft.AspNet.WebApi.Cors

2) Then open the file App_Start/WebApiConfig.cs. Add the following config.EnableCors(); line code to the WebApiConfig.Register method.

public static void Register(HttpConfiguration config)
     {
         // New code
         config.EnableCors(); <-------

         config.Routes.MapHttpRoute(
             name: &quot;DefaultApi&quot;,
             routeTemplate: &quot;api/{controller}/{id}&quot;,
             defaults: new { id = RouteParameter.Optional }
            );
        }

3) Finally, you can add the [EnableCors] attribute on top of your Web API 2 Controller as followed:

using System.Web.Http.Cors;

namespace YourWebAPI2App.Controllers
{
    [EnableCors("*", "*", "*")]
    public class TestController : ApiController
    {
      ....

You can check following link for more details on EnableCors options:

http://www.asp.net/web-api/overview/security/enabling-cross-origin-requests-in-web-api

Hope it helps

@MawashiKid