Prohibit casting HTTP requests to HTTPS requests

Recently encountered a problem, the HTTP request launched in Google Browser will be converted to HTTPS request, but in Safari will not be converted, so temporarily can only be used in Safari browser debugging, but also to see why the HTTP is forced to convert to HTTPS requests, But on the Internet to find the solution is wrong, and later found to be a meta-tag problem, the code is: <meta http-equiv= "Content-security-policy" content= " Upgrade-insecure-requests ", as long as this code is removed, you can prohibit the HTTP request to be cast to the HTTPS request, but according to the test, this code is only in Google browser surface useful.

Prohibit casting HTTP requests to HTTPS requests