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Enforce a minimum SSE reconnect wait to avoid a busy loop (#2592)

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SSEClient::wait_for_reconnect() sleeps in 100ms steps until the
reconnect interval has elapsed. With an interval of 0 (for example
"retry: 0" from the server, or set_reconnect_interval(0)) it never
slept at all, so a server that sends "retry: 0" and closes the stream
made the client reconnect in a tight loop. set_max_reconnect_attempts()
does not stop this either, because each successful connection resets
the attempt counter.

Always wait at least one step (100ms). Intervals of 1-99ms already
waited 100ms because of the step size, so only 0 and negative values
change behavior.
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yhirose
2026-09-28 17:25:37 -04:00
committed by GitHub
parent 3330d0eb06
commit 0715c2739e
3 changed files with 12 additions and 5 deletions
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README-sse.md
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@@ -69,7 +69,7 @@ sse.on_error([](httplib::Error err) { });
#### Configuration
```cpp
// Set reconnect interval (default: 3000ms)
// Set reconnect interval (default: 3000ms, minimum: 100ms)
sse.set_reconnect_interval(5000);
// Set max reconnect attempts (default: 0 = unlimited)