has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource-Go服务器开发

The error message “has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource” usually occurs when a web page makes a request to a different domain that does not allow cross-origin requests.

This error is a security measure implemented by web browsers to prevent unauthorized access to resources. It means that the server hosting the requested resource does not include the appropriate Access-Control-Allow-Origin header in its response.

To resolve this issue, you have a few options:

If you are the owner of the server hosting the requested resource, you can configure it to include the Access-Control-Allow-Origin header in its responses. This header should specify the origin (domain) from which requests are allowed.
If you don’t have control over the server, you can try using a proxy server to make the request on your behalf. This way, your request will be made from the same domain as your web page and won’t trigger the CORS error.
Alternatively, if you are developing locally, you can use browser extensions like “Allow CORS: Access-Control-Allow-Origin” or disable CORS restrictions in your browser during development for testing purposes. However, keep in mind that these solutions should not be used in production environments.

It’s important to note that resolving this issue may require changes on the server-side configuration or cooperation from the owner of the requested resource.

内容由零声教学AI助手提供，问题来源于学员提问