오류 : 요청 헤더 필드 Content-Type은 Access-Control-Allow-Headers에서 허용되지 않습니다.

오류 : 요청 헤더 필드 Content-Type은 Access-Control-Allow-Headers에서 허용되지 않습니다.

---

vS2012를 사용하여 mvc4 웹 API 프로젝트를 만들었습니다. 다음 자습서를 사용하여 Cross-Origin 리소스 공유를 해결했습니다. "http://blogs.msdn.com/b/carlosfigueira/archive/2012/07/02/cors-support-in-asp-net-web-api- rc-version.aspx "입니다. 성공적으로 작동하고 있으며 클라이언트 측에서 서버로 데이터를 성공적으로 게시합니다.

그 후 프로젝트에서 Autherization을 구현하기 위해 다음 자습서를 사용하여 OAuth2를 구현했습니다. "http://community.codesmithtools.com/CodeSmith_Community/b/tdupont/archive/2011/03/18/oauth-2-0-for -mvc-two-legged-implementation.aspx ". 이것은 클라이언트 측에서 RequestToken을 얻는 데 도움이됩니다.

그러나 클라이언트 측에서 데이터를 게시 할 때 "XMLHttpRequest가 http : //를로드 할 수 없습니다. 요청 헤더 필드 Content-Type이 Access-Control-Allow-Headers에서 허용되지 않습니다."라는 오류가 발생했습니다.

내 클라이언트 측 코드는 다음과 같습니다.

 function PostLogin() {
    var Emp = {};            
    Emp.UserName = $("#txtUserName").val();             
    var pass = $("#txtPassword").val();
    var hash = $.sha1(RequestToken + pass);
            $('#txtPassword').val(hash);
    Emp.Password= hash;
    Emp.RequestToken=RequestToken;
    var createurl = "http://localhost:54/api/Login";
    $.ajax({
        type: "POST",
        url: createurl,
        contentType: "application/json; charset=utf-8",
        data: JSON.stringify(Emp),
        statusCode: {
                200: function () {
                $("#txtmsg").val("done");                       
                toastr.success('Success.', '');                         
                }
                },
        error:
            function (res) {                        
                toastr.error('Error.', 'sorry either your username of password was incorrect.');            
                }
        });
    };

내 API 컨트롤러는 다음과 같습니다.

    [AllowAnonymous]
    [HttpPost]
    public LoginModelOAuth PostLogin([FromBody]LoginModelOAuth model)
    {
        var accessResponse = OAuthServiceBase.Instance.AccessToken(model.RequestToken, "User", model.Username, model.Password, model.RememberMe);

        if (!accessResponse.Success)
        {
            OAuthServiceBase.Instance.UnauthorizeToken(model.RequestToken);
            var requestResponse = OAuthServiceBase.Instance.RequestToken();

            model.ErrorMessage = "Invalid Credentials";

            return model;
        }
        else
        {
            // to do return accessResponse

            return model;
        }

    } 

내 webconfig 파일은 다음과 같습니다.

 <configuration>
   <configSections>   
   <section name="entityFramework"    type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  <section name="oauth" type="MillionNodes.Configuration.OAuthSection, MillionNodes, Version=1.0.0.0, Culture=neutral"/>
  <sectionGroup name="dotNetOpenAuth" type="DotNetOpenAuth.Configuration.DotNetOpenAuthSection, DotNetOpenAuth.Core">
  <section name="messaging" type="DotNetOpenAuth.Configuration.MessagingElement, DotNetOpenAuth.Core" requirePermission="false" allowLocation="true" />
  <section name="reporting" type="DotNetOpenAuth.Configuration.ReportingElement, DotNetOpenAuth.Core" requirePermission="false" allowLocation="true" />
</sectionGroup>
</configSections>
<oauth defaultProvider="DemoProvider" defaultService="DemoService">
<providers>
  <add name="DemoProvider" type="MillionNodes.OAuth.DemoProvider, MillionNodes" />
</providers>
<services>
  <add name="DemoService" type="MillionNodes.OAuth.DemoService, MillionNodes" />
</services>
</oauth>
<system.web>
 <httpModules>
   <add name="OAuthAuthentication" type="MillionNodes.Module.OAuthAuthenticationModule, MillionNodes, Version=1.0.0.0, Culture=neutral"/>
  </httpModules>
 <compilation debug="true" targetFramework="4.0" />
<authentication mode="Forms">
  <forms loginUrl="~/Account/Login" timeout="2880" />
</authentication>
<pages>
  <namespaces>
    <add namespace="System.Web.Helpers" />
    <add namespace="System.Web.Mvc" />
    <add namespace="System.Web.Mvc.Ajax" />
    <add namespace="System.Web.Mvc.Html" />
    <add namespace="System.Web.Optimization" />
    <add namespace="System.Web.Routing" />
    <add namespace="System.Web.WebPages" />
  </namespaces>
</pages>
</system.web>
<system.webServer>
 <validation validateIntegratedModeConfiguration="false" />      
  <modules>
      <add name="OAuthAuthentication"     type="MillionNodes.Module.OAuthAuthenticationModule, MillionNodes, Version=1.0.0.0, Culture=neutral" preCondition="" />
 </modules>
 <httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Origin" value="*" />
    </customHeaders>
  </httpProtocol>
</system.webServer>
<dotNetOpenAuth>
<messaging>
  <untrustedWebRequest>
    <whitelistHosts>
      <!-- Uncomment to enable communication with localhost (should generally not activate in production!) -->
      <!--<add name="localhost" />-->
    </whitelistHosts>
  </untrustedWebRequest>
</messaging>
<!-- Allow DotNetOpenAuth to publish usage statistics to library authors to improve the library. -->
<reporting enabled="true" />

---

이 게시물에서 알 수 있듯이 Chrome의 오류 : Access-Control-Allow-Headers에서 Content-Type을 허용하지 않습니다. web.config에 추가 헤더를 추가하십시오.

<httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Origin" value="*" />
    <add name="Access-Control-Allow-Headers" value="Origin, X-Requested-With, Content-Type, Accept" />
  </customHeaders>
</httpProtocol>

---

It is most likely due to a cross-origin request, but it may not be. For me, I had been debugging an API and had set the Access-Control-Allow-Origin to *, but it appears that recent versions of Chrome are requiring an extra header. Try prepending the following to your file if you are using PHP:

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");

Make sure that you haven't already used header in another file, or you will get a nasty error. See the docs for more.

---

I know it's an old thread I worked with above answer and had to add:

header('Access-Control-Allow-Methods: GET, POST, PUT');

So my header looks like:

header('Access-Control-Allow-Origin: *');
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
header('Access-Control-Allow-Methods: GET, POST, PUT');

And the problem was fixed.

---

For Nginx, the only thing that worked for me was adding this header:

add_header 'Access-Control-Allow-Headers' 'Authorization,Content-Type,Accept,Origin,User-Agent,DNT,Cache-Control,X-Mx-ReqToken,Keep-Alive,X-Requested-With,If-Modified-Since';

Along with the Access-Control-Allow-Origin header:

add_header 'Access-Control-Allow-Origin' '*';

Then reloaded the nginx config and it worked great. Credit https://gist.github.com/algal/5480916.

참고URL : https://stackoverflow.com/questions/12409600/error-request-header-field-content-type-is-not-allowed-by-access-control-allow