兼容:

ASP:

<%

If Request.ServerVariables("SERVER_PORT")=80 Then

Dim strSecureURL

strSecureURL = "https://"

strSecureURL = strSecureURL & Request.ServerVariables("SERVER_NAME")

strSecureURL = strSecureURL & Request.ServerVariables("URL")

Response.Redirect strSecureURL

End If

%>

PHP:

if(!isset($_SERVER['HTTPS'])||!$_SERVER['HTTPS']){

    $url ='https://'. $_SERVER['HTTP_HOST']. $_SERVER['REQUEST_URI'];

    header('Location: '. $url);exit;

}