CDN对源加速设置完成之后访问源站域名403错误

The error message you're encountering typically occurs when you're trying to view an XML file directly in a web browser, and the browser expects there to be a stylesheet associated with it to format the display of the XML data. However, since it's just raw XML without any styling instructions, the browser displays this message instead.

In terms of Alibaba Cloud products, if you're working with services like Object Storage Service (OSS) or Function Compute where you might store or process XML files, ensure that:

1. Correct MIME Type: If you're serving XML files from OSS, make sure they are set with the correct MIME type (application/xml or text/xml). This won't change how browsers display raw XML but ensures proper handling when downloaded or used by other applications.

2. Processing XML in Applications: If you're using Function Compute to process these XML files, ensure your function correctly parses and handles the XML content. You might use libraries or built-in functions in your preferred language (e.g., Python's xml.etree.ElementTree, Java's javax.xml.parsers.DocumentBuilder) to parse the XML data.

3. API Gateway or Web Application: If you're returning XML through API Gateway or a deployed web application, ensure that either the response includes appropriate Content-Type headers indicating it's XML, or, if intended for direct browser viewing, consider implementing an XSLT stylesheet reference within the XML to style the output.

4. Error Handling: The "NotImplemented" part seems unrelated to the XML styling issue and might point to a different problem, possibly within your application logic or API responses. Check your application code or API configurations to ensure all implemented functionalities have their corresponding handlers.

If you're facing issues with specific Alibaba Cloud services related to XML processing or serving, I recommend checking the Alibaba Cloud documentation or reaching out to their support for more detailed assistance tailored to your setup.