Validates a url relative to a image stored in cloud.

Should be an HTTPS link and the image should be of type: ["png","bmp","jpg","jpeg","gif"].

Useful to block the use of images that don't are serverd over https protocol and could break application security.

Examples

iex > url = "www.google.com"
iex > Krug.ImageUtil.validate_url(url)
false

iex > url = "http://www.google.com"
iex > Krug.ImageUtil.validate_url(url)
false

iex > url = "https://www.google.com.br"
iex > Krug.ImageUtil.validate_url(url)
false

iex > url = "https://www.google.com.png"
iex > Krug.ImageUtil.validate_url(url)
true

iex > url = "https://www.google.com.gif"
iex > Krug.ImageUtil.validate_url(url)
true