Resolve Cross-Origin Access

Feb 8, 2024#JavaWeb #异常166

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In the front end, various response headers are set to inform the browser about allowing cross-origin requests in the server response. In the back end, @CrossOrigin annotation is added in the Controller layer to automatically set Access-Control-Allow-* response headers for proper handling of cross-origin requests by the browser. It is important to limit access to trusted domains to reduce security risks when enabling cross-origin requests.

Solving in the Frontend#

Set various response headers to inform the browser in the server response that cross-origin requests are allowed. By setting these response headers, the server informs the browser how to handle cross-origin requests.

Solving in the Backend#

Add the @CrossOrigin annotation in the Controller layer.

The @CrossOrigin annotation actually automatically sets the Access-Control-Allow-* response headers in the backend so that the browser can handle cross-origin requests correctly.

It is important to note that enabling cross-origin requests may increase security risks. Therefore, it is best to restrict the list of allowed domains and only allow requests from trusted domains to access your API.