Controlling access to embedded app

Anvil Q&A
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I’m thinking about licensing other sites to embed an Anvil app.

If anyone has experience with limiting/controlling the sites that are allowed to embed your Anvil app, could you give me any pointers how to go about it?

I’m guessing that it may require my delving into Javascript and using postMessage for the embedded form to convey the URL of the page in which it’s embedded, and then the app responding according to whether that site does or doesn’t have an active license. But the less I need to re-invent in a language I’m largely unfamiliar with, the better!

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I wrote a blog post on controlling an embedded app via postMessage:

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That’s what I was looking for – many thanks @owen.campbell !

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