The Rules are powerful way how to hide watermarks and apply image resizing or filtering parameters invisibly in the image URLs.
You can configure them:
- in the Cloudimage Admin Panel-> page Image Settings -> tab Rules:
- in the Filerobot Asset Hub -> settings -> page Process -> tab Rules:
The Rules configuration has some specifics that are good to be mentioned:
- Rules work on the principle of simple string matching. They are not Regexes and the Regex syntax and special characters are currently non-applicable for them.
- the Rules function receives the image URL in a format starting after the "/v7/"-part.
Example:
- if the image URL is https://token.cloudimg.io/v7/__alias__/image.jpg
then the function receives it as "__alias__/image.jpg"
A rule, matching the keyword "__alias__", will work but another rule like "/__alias__" will fail because the slash symbol ("/") in its beginning won't be matched.
Due to the same technical specifics, please do not assign rules that to match your token, CNAME or keywords like "cloudimg", and "v7". - Please avoid the rules overlapping. If you create 2 rules that match "_img" and "__img__" respectively, that might lead to unexpected results.
- When the image URL contains an alias, then the rule should be created to match that alias but not its corresponding value.
Example:
- if the image URL is https://token.cloudimg.io/v7/__alias__/image.jpg
and __alias__ stays for www.my-original-domain.com
then the rule should be set up to match "__alias__" (not www.my-original-domain.com ) - The Rules can include Presets.
- You can check this article if you want to learn a handy way how to hide your watermarks so to be invisible in the image URLs.
If you have some specific use case and/or you would like to receive more information on the topic, feel free to contact us and we will be glad to help and to reply to all your questions.
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