No-referrer-when-downgrade appears on the request interface
Reason 1: The request URL is incorrect
Confirm the URL is correct
Cause 2:
no referrer when downgrade means: it is not recommended when downgrade.
Linking from one website to another will generate a new http request. Referrer is a field in the http request that indicates the source.
no-referrer-when-downgrade means that no referrer will be sent to the server of the redirected website when the HTTP protocol is downgraded from the https protocol.
Introducing images, JS and other resources into a page, or jumping from one page to another, will generate new HTTP requests. Browsers generally add a Referrer field to these request headers to indicate the source. Referrer is very useful in analyzing the source of users and is widely used. However, the URL may contain sensitive user information, which is not safe if it is obtained by a third-party website.
The new Referrer Policy specifies five Referrer policies: No Referrer, No Referrer When Downgrade, Origin Only, Origin When Cross-origin, and Unsafe URL.
reference:
https://www.cnblogs.com/lwming/p/11577554.html
https://blog.csdn.net/lxw1844912514/article/details/100028629