When Slash does finally wake up 30 seconds later, it starts working and getting the user data. Since it comes back with no user I then try to create a user immediately, which also fails, because Slash is still not up and online. The problem is that I am expecting the GraphQL request to work the very first time. If the user does not exist, then a user is created matching the signed in user. Additionally, for HTTP request methods that can cause side-effects on server data (in particular, HTTP methods other than GET, or POST with certain MIME types), the specification mandates that browsers "preflight" the request, soliciting supported methods from the server with the HTTP OPTIONS request method, and then, upon "approval" from the server, sending the actual request.On the first load of the site after login the site uses GraphQL to find the info for the logged in user (per Auth0). The Cross-Origin Resource Sharing standard works by adding new HTTP headers that let servers describe which origins are permitted to read that information from a web browser. Modern browsers use CORS in APIs such as XMLHttpRequest or Fetch to mitigate the risks of cross-origin HTTP requests. The CORS mechanism supports secure cross-origin requests and data transfers between browsers and servers. This means that a web application using those APIs can only request resources from the same origin the application was loaded from unless the response from other origins includes the right CORS headers. For example, XMLHttpRequest and the Fetch API follow the same-origin policy. įor security reasons, browsers restrict cross-origin HTTP requests initiated from scripts. In that preflight, the browser sends headers that indicate the HTTP method and headers that will be used in the actual request.Īn example of a cross-origin request: the front-end JavaScript code served from uses XMLHttpRequest to make a request for. CORS also relies on a mechanism by which browsers make a "preflight" request to the server hosting the cross-origin resource, in order to check that the server will permit the actual request. Permissions-Policy: xr-spatial-tracking ExperimentalĬross-Origin Resource Sharing ( CORS) is an HTTP-header based mechanism that allows a server to indicate any origins (domain, scheme, or port) other than its own from which a browser should permit loading resources.Permissions-Policy: speaker-selection Experimental.Permissions-Policy: serial Experimental.Permissions-Policy: screen-wake-lock Experimental.Permissions-Policy: publickey-credentials-get Experimental.Permissions-Policy: picture-in-picture Experimental.Permissions-Policy: payment Experimental.Permissions-Policy: magnetometer Experimental.Permissions-Policy: local-fonts Experimental.Permissions-Policy: idle-detection Experimental.Permissions-Policy: identity-credentials-get Experimental.Permissions-Policy: gyroscope Experimental.Permissions-Policy: gamepad Experimental.Permissions-Policy: execution-while-out-of-viewport Experimental.Permissions-Policy: execution-while-not-rendered Experimental.Permissions-Policy: encrypted-media Experimental.Permissions-Policy: document-domain Experimental.Permissions-Policy: battery Experimental.Permissions-Policy: autoplay Experimental.Permissions-Policy: ambient-light-sensor Experimental.Permissions-Policy: accelerometer Experimental.Reason: Multiple CORS header 'Access-Control-Allow-Origin' not allowed.Reason: missing token 'xyz' in CORS header 'Access-Control-Allow-Headers' from CORS preflight channel.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Methods'.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Headers'.Reason: expected 'true' in CORS header 'Access-Control-Allow-Credentials'.Reason: Did not find method in CORS header 'Access-Control-Allow-Methods'.Reason: Credential is not supported if the CORS header 'Access-Control-Allow-Origin' is '*'.Reason: CORS request external redirect not allowed.Reason: CORS preflight channel did not succeed.Reason: CORS header 'Origin' cannot be added.Reason: CORS header 'Access-Control-Allow-Origin' missing. Reason: CORS header 'Access-Control-Allow-Origin' does not match 'xyz'.
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