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GitHub comment: This is an intentional design decision, and is working as intended. When Discord crawls a URL we perform that action as a bot. However, when we proxy images we are acting in response to a user loading that image. Because of this distinction we provide a user agent of a user, not a bot. (29 downvotes)

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GitHub comment: This is an intentional design decision, and is working as intended. When Discord crawls a URL we perform that action as a bot. However, when we proxy images we are acting in response to a user loading that image. Because of this distinction we provide a user agent of a user, not a bot. (29 downvotes)
https://media.mstdn.io/mstdn-media/media_attachments/files/111/616/351/111/297/387/original/df443431b24a746f.png

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jomo (jomo@mstdn.io)'s status on Thursday, 21-Dec-2023 13:09:09 JST jomo

TIL #Discord effectively does traffic amplification when users post an image. They crawl the image URL using a Discordbot User-Agent, but in the same second request the same URL with a spoofed Mac OS browser User-Agent that can't be identified as a Discord request.
Both request are required for the image to render in Discord chat. Absolutely great!
https://github.com/discord/discord-api-docs/issues/1600#issuecomment-628529359

In conversation Thursday, 21-Dec-2023 13:09:09 JST from mstdn.io permalink