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Allow Cowboy to stream the response instead of chunk it

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This commit is contained in:
Mark Felder 2024-06-04 22:44:56 -04:00
parent ff6f5a417f
commit 858d528cc1
2 changed files with 16 additions and 1 deletions
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1
changelog.d/cowboy-stream-chunked.fix Normal file
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@ -0,0 +1 @@
Restore Cowboy's ability to stream MediaProxy responses without Chunked encoding.

16
lib/pleroma/reverse_proxy.ex
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@ -8,7 +8,7 @@ defmodule Pleroma.ReverseProxy do
~w(if-unmodified-since if-none-match) ++ @range_headers
@resp_cache_headers ~w(etag date last-modified)
@keep_resp_headers @resp_cache_headers ++
~w(content-type content-disposition content-encoding) ++
~w(content-length content-type content-disposition content-encoding) ++
~w(content-range accept-ranges vary)
@default_cache_control_header "public, max-age=1209600"
@valid_resp_codes [200, 206, 304]
@ -180,6 +180,7 @@ defmodule Pleroma.ReverseProxy do
result =
conn
|> put_resp_headers(build_resp_headers(headers, opts))
|> streaming_compat
|> send_chunked(status)
|> chunk_reply(client, opts)
@ -417,4 +418,17 @@ defmodule Pleroma.ReverseProxy do
@cachex.put(:failed_proxy_url_cache, url, true, ttl: ttl)
end
# When Cowboy handles a chunked response with a content-length header it streams
# over HTTP 1.1 instead of chunking. Bandit cannot stream over HTTP 1.1 so the header
# must be stripped or it breaks RFC compliance for Transfer Encoding: Chunked. RFC9112§6.2
#
# HTTP2 is always streamed for all adapters.
defp streaming_compat(conn) do
with Phoenix.Endpoint.Cowboy2Adapter <- Pleroma.Web.Endpoint.config(:adapter) do
conn
else
_ -> delete_resp_header(conn, "content-length")
end
end
end