Error 405 when consuming Api Rest service

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Error 405 when consuming Api Rest service

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#1 by (1 votes)
#2 by (0 votes)

1

I am having a problem when trying to consume an Api Rest service from Angular 6, my Angular code is as follows:

GuardarDatos(datos:General):Observable<string> {

const httpOptions = {
    headers: new HttpHeaders({
        'Content-Type':  'application/json',
        'Authorization': 'Access-Control-Allow-Origin'
    })
};
let url ='${Conexion.URL}${Operacion.guardardatos}';
let header =this.getHeaders();
return this.http.post<string>(url,datos,httpOptions).pipe();

I have the ApiRest as follows:

[ActionName("TasaPreferTdc")]
[HttpPost]
public string CrearTasaPrefer([FromBody]DatoGeneral objDatoGeneral)
{ return "";}

When making the call I get this error:

.net angular asp.net-web-api

asked by GHerreraZ 08.06.2018 в 23:31

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2 answers

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score 1 · Answer 1

enable CORS done the following steps

Install the nuget package for CORS : Install-Package Microsoft.AspNet.WebApi.Cors .

Modify your WebApiConfig.cs file with the Register method by adding the following line

config.EnableCors();

You can enable CORS in your controller in the following way

 using System.Net.Http;
 using System.Web.Http;
 using System.Web.Http.Cors;

namespace CORSWithWebAPI.Controllers
{
   [EnableCors(origins: "http://client.domain", headers: "*", methods: "*")]
   public class SampleController : ApiController
   {
      public HttpResponseMessage Post() { ... }

     [DisableCors]
     public HttpResponseMessage PutItem(int id) { ... }   
   }
}

You can enable CORS at action level

public class SampleController : ApiController
{
    [EnableCors(origins: "http://client.domain", headers: "*", methods: "*")]
    public HttpResponseMessage GetSample(int id) { ... }
}

You can enable it globally by modifying point 1:

public static class WebApiConfig
{ 
   public static void Register(HttpConfiguration config)
   {
      var cors = new EnableCorsAttribute("client.domain", "*", "*");
      config.EnableCors(cors);
   }
}

Even from web.config

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

score 0 · Answer 2

Notice that what you are really complaining about is that your server is not accepting a request of type OPTIONS, not the POST that you do with your code.

That OPTIONS request is sent by the browser as part of the control of cross-originated requests (what in English they call CORS), that is, it is included when requesting a resource to a server that is not the one that has generated the page (in your case, you are serving the page from localhost: 4200 and you are doing the POST to localhost: 49143).

Check the configuration of your IIS server so that it accepts OPTIONS requests.

PS: I leave you this link so you can take a look at it