Which method and location is recommended for HTTP redirecting to HTTPS: 302, 303, or 307?

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The recommended method for HTTP redirecting to HTTPS is to use a 301 redirect. This informs search engines that the original URL has permanently moved to a new location, and all links and other SEO value associated with the original URL will now be associated with the new HTTPS URL. Additionally, a 301 redirect guarantees that all users who access the original HTTP URL will be automatically redirected to the new HTTPS URL.