WebApi 2.1 Errore di lancio PUT 415

Question

Sto tentando di aggiornare i dati utilizzando il metodo PUT WebApi. Il mio codice funziona bene prima, ma improvvisamente ho iniziato a ricevere questo errore.

"Message":"The request contains an entity body but no Content-Type header. The inferred media type 'application/octet-stream' is not supported for this resource.","ExceptionMessage":"No MediaTypeFormatter is available to read an object of type 'xEmployee' from content with media type 'application/octet-stream'.","ExceptionType":"System.Net.Http.UnsupportedMediaTypeException". 

Si tratta di intestazioni: intestazione di risposta.

HTTP/1.1 415 Unsupported Media Type 
Cache-Control: no-cache 
Pragma: no-cache 
Content-Type: application/json; charset=utf-8 
Expires: -1 
Server: Microsoft-IIS/7.5 
Set-Cookie: Role=D65520F37D105E39C1A92C15CD482E378F32A769592AC7D8305285A5B9B90362F7F2F13F14E6DC220E44D26940B06B52E7460EF13184F245805AF9523D1072464F4BD06AFB4F8AEB8B7D8BF607A8922C6041A3A4C636BF3B26388E606A94FE43; expires=Tue, 07-Oct-2014 09:49:56 GMT; path=/ 
X-AspNet-Version: 4.0.30319 
X-Powered-By: ASP.NET 
Date: Tue, 07 Oct 2014 09:19:56 GMT 
Content-Length: 809 

Richiesta Intestazione:

PUT /api/xemployees/2110481232 HTTP/1.1 
Host: guideonline.ilvestour.office 
Connection: keep-alive 
Content-Length: 229 
Accept: application/json, text/javascript, */*; q=0.01 
Origin: http://guideonline.ilvestour.office 
X-Requested-With: XMLHttpRequest 
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.124 Safari/537.36 
Content-Type: application/json; charset=UTF-8" 
Referer: http://guideonline.ilvestour.office/account 
Accept-Encoding: gzip,deflate,sdch 
Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4 
Cookie: .ASPXAUTH=215C424A0A023F5B42775B7A73B08FEC8CB36E7200FBA430EADF2F300A84500571F8B5EE980C3EF2913FE160978973CDBC50BDD216E16FC342EF0B566D0944ECFD901DF471DEF9F6E5D272B52F2450CC0A1FB96BCC6B3B6E7A7C07343D4DFBD66; Role=DE678EE89D7089B8CD74B202E00C53CA9AE9E4C40B506C5C4EEF56E7962F38ED86F6BFD34E5FD3A6DD6ECCCF61AF768CAB0C1D7C5F15A8638F9454B24DF3208F021EB638235420574C6420CA5A19F0B6BD07BAC303FF79612D6C1AF246563A7 
Request Payloadview source 
{"Kod":2110481232, "Сотрудник": "Lena", "Telephon": "088-6734227", "Password":"rimosa57", "email":"samoylova-elena@mail.ru", "CrWho":"OMEGA.Administrator", "CrWhen":"2014-10-07T09:20:05.735Z"} 

Niente di speciale nel codice di controllo:

[Authorize(Roles = "Admin, User")] 
     public async Task<IHttpActionResult> PutxEmployee(int id, xEmployee xEmployee) 
     { 
      if (!ModelState.IsValid) 
      { 
       return BadRequest(ModelState); 
      } 

      if (id != xEmployee.Kod) 
      { 
       return BadRequest(); 
      } 

      try 
      { 
       var user = db.xEmployee.Find(id); 
       user.Сотрудник = xEmployee.Сотрудник; 
       user.Telephon = xEmployee.Telephon; 
       user.Password = xEmployee.Password; 
       user.email = xEmployee.email; 
       await db.SaveChangesAsync(); 
      } 
      catch (DbUpdateConcurrencyException) 
      { 
       if (!xEmployeeExists(id)) 
       { 
        return NotFound(); 
       } 
       else 
       { 
        throw; 
       } 
      } 
      catch (DbEntityValidationException e) 
      { 
       foreach (var eve in e.EntityValidationErrors) 
       { 
        var path = "C:/error.txt"; 
        using (StreamWriter sw = File.CreateText(path)) 
        { 
         sw.WriteLine("Entity of type \"{0}\" in state \"{1}\" has the following validation errors:", 
           eve.Entry.Entity.GetType().Name, eve.Entry.State); 
        } 
        using (StreamWriter sw1 = File.CreateText("C:/error1.txt")) 
         foreach (var ve in eve.ValidationErrors) 
         { 
          sw1.WriteLine("- Property: \"{0}\", Error: \"{1}\"", 
           ve.PropertyName, ve.ErrorMessage); 
         } 
       } 
       throw; 
      } 
      return StatusCode(HttpStatusCode.NoContent); 
     } 

Uguale WebApiConfig:

public static void Register(HttpConfiguration config) 
     { 
      config.MapHttpAttributeRoutes(); 
      config.Routes.MapHttpRoute(
       name: "DefaultApi", 
       routeTemplate: "api/{controller}/{id}", 
       defaults: new { id = RouteParameter.Optional } 
      ); 
      var json = config.Formatters.JsonFormatter; 
      json.SerializerSettings.Culture = new CultureInfo("ru-RU"); 
      config.Formatters.Remove(config.Formatters.XmlFormatter); 
     } 

Answer 1

Sembra che ci sia un errore di battitura (ultima ") nell'intestazione Content-Type della richiesta R:

Content-Type: application/json; charset=UTF-8" 

Quando questa intestazione è mancante o non valido, il server utilizzerà automaticamente application/octet-stream per impostazione predefinita, come descritto da this post.

Answer 2

Inoltre, assicurarsi che ci sia solo un'intestazione Content-Type. Nel mio caso, il mio cliente di riposo inviava implicitamente il numero Content-Type vuoto che è stato sostituito da Content-Type: application/json quindi l'errore.