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[Source] Spring Cloud Gateway CORS cross-domain configuration

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Posted on 7/28/2021 5:39:14 PM | | | |
The project is the separation of the front and back ends, the front end and the back end are not on the same port, and there is a cross-domain problem when the front end calls the backend interface.

If the gateway allows cross-domain transmission, the following error is reported:

Access to XMLHttpRequest at 'http://127.0.0.1:9999/gateway/auth/account/requestToken' from origin 'http://localhost:60356' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
jquery.min.js:2 POST http://127.0.0.1:9999/gateway/auth/account/requestToken net::ERR_FAILED
About the Spring Cloud Gateway CORS configuration document tutorial:The hyperlink login is visible.

Modify the application.yml configuration file as follows:

Once the setup is complete, rerun the project due toThe microservices themselves are also set up to allow cross-domain, duplicate content will appear in the POST response header with the following error:

Access to XMLHttpRequest at 'http://127.0.0.1:9999/gateway/auth/account/requestToken' from origin 'http://localhost:60356' has been blocked by CORS policy: The ' Access-Control-Allow-Origin' header contains multiple values 'http://localhost:60356, http://localhost:60356', but only one is allowed.


Solution: Create a new CorsResponseHeaderFilter filter to remove some of the same response headers, the code is as follows:

Create a new CorsConfiguration file and register the beans with the following code:

Successfully resolve the issue as shown in the image below:



(End)





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