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b9276e21ee
MSC4108 relies on ETag to determine if something has changed on the rendez-vous channel. Strong and correct ETag comparison works if the response body is bit-for-bit identical, which isn't the case if a proxy in the middle compresses the response on the fly. This adds a `no-transform` directive to the `Cache-Control` header, which tells proxies not to transform the response body. Additionally, some proxies (nginx) will switch to `Transfer-Encoding: chunked` if it doesn't know the Content-Length of the response, and 'weakening' the ETag if that's the case. I've added `Content-Length` headers to all responses, to hopefully solve that. This basically fixes QR-code login when nginx or cloudflare is involved, with gzip/zstd/deflate compression enabled. |
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