There is some site server.com on it is https. At the same time the site loads images from a remote resource any.com. Unfortunately, any.com does not support https, which leads to the fact that some browsers swear that they are saying unsafe content.
The first option is to find any.com admins and use a stick to force them to connect https - unfortunately there is no (the service is located behind the hill, and they do not perceive requests by mail.
One solution to the problem is to write a script proxy, and insert the links of the form:
https://server.com/proxy.php?http://any.com/image.jpg But this option does not quite fit. I worry that the server will quickly be bent - too many such requests will fall on one page. It’s also unrealistic to cache it, there is not enough hard disk space (there are really a lot of 7000 * 20 * 3 = ~ 420,000 pieces, and they are often updated, new ones appear, old ones are deleted).
The third option is to connect some kind of CDN to which you can put links like:
https://cdn.com/?http://any.com/image.jpg But here's the problem - I do not know similar services. Tell me something?