Authenticating to OIDC server is not redirecting back to the page , but keeps staying on the tab that opens when authorizing.

[KlodianMaloku-Rt]

Describe the bug
When trying to authorize , UI opens a new tab that redirects to the OIDC server ( in my case keycloak ) . After authenticating to idp the new tab is not closed but stays open and swagger is not authorized. I have to add a interceptor to use that token that is in url of the redirected page.
To Reproduce
heare are my configs:

1. in settings

INSTALLED_APPS = [
   .....
    'call.integrations.swagger',
   ....
]

AUTHENTICATION_BACKENDS = (
    'social_core.backends.okta_openidconnect.OktaOpenIdConnect',
    'django.contrib.auth.backends.ModelBackend',
)

REST_FRAMEWORK = {
    .........
    'DEFAULT_SCHEMA_CLASS': 'drf_spectacular.openapi.AutoSchema',
}

SPECTACULAR_SETTINGS = {
    'TITLE': 'Console API',
    'DESCRIPTION': 'Console API',
    'VERSION': '1.0.0',
    'SERVE_INCLUDE_SCHEMA': False,
    "SWAGGER_UI_SETTINGS": {
        "persistAuthorization": True,
        "withCredentials": True
    },
    'SERVE_PERMISSIONS': ['rest_framework.permissions.AllowAny'],
    'SERVE_AUTHENTICATION': [],
    'SCHEMA_PATH_PREFIX': r'\/(?:api\/)?callcenter(?:\/public\/v\d+)?(?:\/config)?(?:\/workspace\/\{workspace_id\})?\/?',
}

2. 'call.integrations.swagger',

from drf_spectacular.extensions import OpenApiAuthenticationExtension


class BearerTokenAuthenticationSchema(OpenApiAuthenticationExtension):
    """
    Swagger schema extension to add oauth2 authentication
    and targeting our authentication class.
    """
    target_class = "call.auth.authentication.UserTokenAuthentication"

    def get_security_definition(self, auto_schema):
        from call.core.models import Account
        account = Account.objects.filter(idp__isnull=False).first()

        return {
            'type': 'oauth2',
            'description': 'Bearer token authentication, using keycloak',
            'flows': {
                'implicit': {
                    'authorizationUrl': f'{account.idp.idp_hostname}/realms/{account.keycloak_realm}/protocol/'
                                        'openid-connect/auth',
                    'tokenUrl': f'{account.idp.idp_hostname}/realms/{account.keycloak_realm}/protocol/openid-connect/token',
                    'refreshUrl': f'{account.idp.idp_hostname}/realms/{account.keycloak_realm}/protocol/openid-connect/token',
                    'scopes': {
                        'openid': 'openid',
                        'profile': 'profile'
                    },
                }
            },
        }

3. script in ui

  <script>
        
        document.addEventListener("DOMContentLoaded", function() {
            //Try getting the access token from url of the auth2-redirect.html page
            let accessToken = null;
            try {
                const currentUrl = window.location.href;
                const url = new URL(currentUrl);
                const params = new URLSearchParams(url.hash.replace('#', '?'));
                accessToken = params.get('access_token');
            } catch (error) {
                console.error(error);
            }
            
            const ui = SwaggerUIBundle({
                url: '/callcenter/schema/',
                dom_id: '#swagger-ui',
                presets: [
                    SwaggerUIBundle.presets.apis,
                    SwaggerUIBundle.SwaggerUIStandalonePreset
                ],
                plugins: [
                    SwaggerUIBundle.plugins.DownloadUrl
                ],
                layout: 'BaseLayout',
                requestInterceptor: (request) => {
                if (accessToken) {
                    request.headers['Authorization'] = `Bearer ${accessToken}`;
                    }
                    return request;
                },
            });
            const initOAuthParams= {
                enable: true,
                clientId: '{{ client_id }}',
                appName: 'Swagger API Documentation',
                scopeSeparator: ' ',
                scopes: 'openid profile',
                useBasicAuthenticationWithAccessCodeGrant: true,
                usePkceWithAuthorizationCodeGrant: true,
                additionalQueryStringParams:{
                    'kc_idp_hint': '{{ idpHint }}'
                }
            }
    
            ui.initOAuth(initOAuthParams);

        });
        
    </script>

Expected behavior
I was expecting that when authenticating swagger a new tab opens , and after authenticating to keycloak, this tab closes and i am turned back to the first tab. When turning back to the first tab the pop up of authentication shows that i am authenticated.

[tfranzel]

Hi, I have never used this particular ouath2 scheme. It seems strange that the window will not close. Extracting the access_token from the the popup response seems to me like a missing functionality in SwaggerUI itself (for that auth flow). The auth window not closing certainly points in that direction.

accessToken = params.get('access_token');

I think this should be picked up by SwaggeUI. Maybe it is already saved internally, just not used. Have a look at our injectAuthCredentials() ->authDef.schema

Also notice that we have a setting for initOAuthParams: SWAGGER_UI_OAUTH2_CONFIG

Beware that we also have a interceptor which you are overriding now: https://github.com/tfranzel/drf-spectacular/blob/972141ba71cf3fd3ef37958c3a5f0f38b5d78464/drf_spectacular/templates/drf_spectacular/swagger_ui.js#L100C7-L100C25

We just merged #1191, because we missed reloading the schema after successful oauth2 authentication. However, I think this issue seems one step before that. It is worth a try though.

Let me know what works

[tfranzel]

Might #1142 be the source of the problem?

Apparently the obtained credentials cannot flow back to the origin but are are kind of past that point already.

[KlodianMaloku-Rt]

Maybe this will fix the problem. When is this going to merge? Should I use drf-spectaculuar-sidecar alone or together with drf-spectacular to get the latest version after the fix is merged?

[tfranzel]

you don't need to use drf-spectaculuar-sidecar. Also there are no modifications there, just "cached" assets. This would only be beneficial for serving the oauth2-redirect.htmlfrom your origin, nothing else imho.

I am reviewing #1142 atm

Since I cannot rebuild your setup exactly, it would be helpful if you could find out where it hangs for you.

• first install spectacular at the master branch for Add a specific Action Wrapper for OAuth Authorization requests #1190 #1191
• if that does not fix it, just override what Fix builtin Swagger-UI OAuth login #1142 is doing in your view.

[lilioid]

I can at least confirm that the bug I'm fixing in #1142 shows the same behavior as described here. The tab opened by Swagger-UI stays open (and blank) while complaining in its javascript console that window.opener is null.

I don't know anything about addin interceptors to swagger itself though 😅

[KlodianMaloku-Rt]

Hello, I tried to extend the view class includeing the header to response. Also removed my template and let drf-spectacular use the default template and it didnt work. Here is my impl:

from django.conf import settings
from drf_spectacular.utils import extend_schema
from drf_spectacular.views import SpectacularSwaggerView


class CallSwaggerView(SpectacularSwaggerView):

    @extend_schema(exclude=True)
    def get(self, request, *args, **kwargs):
        response = super().get(request, *args, **kwargs)
        response.data['client_id'] = settings.SWAGGER_KCLOAK_CLIENT_ID
        response.data['idpHint'] = ''
        response.headers = {
            "Cross-Origin-Opener-Policy": "unsafe-none",
        }
        return response

class Provider1SwaggerView(CallSwaggerView):

    @extend_schema(exclude=True)
    def get(self, request, *args, **kwargs):
        response = super().get(request, *args, **kwargs)
        return response


class Provider2SwaggerView(CallSwaggerView):

    @extend_schema(exclude=True)
    def get(self, request, *args, **kwargs):
        from smartcall.core.models import Account
        from call.utils.platform_utils import ProviderNames
        account_2 = Account.objects.filter(idp__platform=ProviderNames.Provider2).first()
        response = super().get(request, *args, **kwargs)
        response.data['idpHint'] = account_2.provider_id
        return response

And the url conf is this one:

swagger_urlpatterns = [
    # schema view
    re_path(r'^call/schema/', Provider1SwaggerView.as_view(), name='schema'),
    # Provider1 UI
    re_path(
        r'^call/api-provider1/',
        Provider1SwaggerView.as_view(
            url_name='schema',
            template_name='swagger.html'
        ),
        name='swagger-ui-provider1'
    ),
    # Provider2 UI
    re_path(
        r'^call/api-provider2/',
        Provider2SwaggerView.as_view(
            url_name='schema',
            template_name='swagger.html'
        ),
        name='swagger-ui-provider2'
    ),
    # redoc UI
    re_path(r'^call/redoc/', SpectacularRedocView.as_view(url_name='schema'), name='redoc'),
] if settings.SHOW_SWAGGER else []

I have two url because I have different auth schema for different providers.

[KlodianMaloku-Rt]

@ftsell in my case the tab stays open but not blank. After authenticating to keycloak it redirects back to my swagger url ( in the same tab ) but as not authenticated. Thats it why i have to use that interceptor.

[KlodianMaloku-Rt]

@tfranzel Maybe can help, after authenticating to the new tab it redirects back with the token in url:
https:///oauth2-redirect.html#state=&session_state=&access_token=<access_token>&token_type=Bearer&expires_in=900