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sse endpoint: hint to reverse-proxy not to buffer

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Similarly to 210787a3, and as discussed in #88 and #130, nginx
will buffer chunked transfer-encoding unless proxy_buffering
is turned off or the X-Accel-Buffering header is set to no.

resolves #130
This commit is contained in:
Oliver Giles 2020-08-11 06:54:03 +12:00
parent 8a4992e6af
commit 4316eb8a00
1 changed files with 2 additions and 0 deletions
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2
src/http.cpp
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@ -203,6 +203,8 @@ kj::Promise<void> Http::request(kj::HttpMethod method, kj::StringPtr url, const
if(is_sse) {
KJ_IF_MAYBE(s, fromUrl(url.cStr(), queryString)) {
responseHeaders.set(kj::HttpHeaderId::CONTENT_TYPE, "text/event-stream");
// Disables nginx reverse-proxy's buffering. Necessary for streamed events.
responseHeaders.add("X-Accel-Buffering", "no");
auto peer = kj::heap<WithSetRef<EventPeer>>(eventPeers);
peer->scope = *s;
std::string st = "data: " + laminar.getStatus(peer->scope) + "\n\n";