this post was submitted on 16 Jun 2023
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If you wanna write code to do this ... I'd say skip the bot, write a gateway instead.
Back in the early days of email, there were lots of different email systems, not just the SMTP Internet email we use today. There was UUCP email with "bang paths", where your email address specified a list of servers that a message could be passed through to get to you. There were other networks like FidoNet and WWIVnet, that could send email to Internet email addresses through special "gateway" servers.
A gateway receives messages using one protocol or service, and retransmits or makes them available on another protocol or service.
For a little while in 1992, I had access to read Usenet posts only through a gateway that exported Usenet posts onto the Gopher system.
A gateway between Reddit and Lemmy would appear to Reddit as a web browser, scraping posts and comments; while appearing to Lemmy as a Lemmy instance that users could subscribe to, making each subreddit it scrapes available as a Lemmy community.
So a Lemmy user could subscribe to, say, [email protected] and see a fresh view of AskReddit. The server at reddittolemmy.com would not be a standard Lemmy server with users, but rather a custom gateway server that fetches data from Reddit and makes it available in the form of a Lemmy community.
(If Reddit were not being an asshole, a gateway could be an API client. But Reddit is being an asshole, so a gateway should probably be written as a scraper that accesses Reddit as if it were a normal user using a desktop Web browser.)