When the number of sessions reaches MAX_SESSIONS, which defaults
to 1,000, turn off TCP and SSL listening sockets to prevent new
connections. When the session count falls below a low watermark,
currently 90% of MAX_SESSIONS, the listening sockets will be re-opened.
Helps prevent DoS and limit open file usage.
Bug fix: do not start serving paused connections until the buffer
socket is sufficiently drained. Also, loop.
The block processor needs to be able to close cleanly, and not
mid-block. In order to be able to yield whilst processing blocks
we cannot forcefully close its coroutine with a cancellation.
Daemon URLs can be comma-separated in the DAEMON_URL env var.
Surrounding whitespace is stripped.
http:// is preprended if missing.
The coin's default port is supplied if missing.
A trailing / is supplied if missing.
Closes#33
Mempool updates happen in parallel asynchronously to processing of
new blocks once caught up. This means that, e.g., during the initial
slow mempool download incoming blocks can be processed and communicated
to clients without waiting for the downloaded mempool transaction
analysis to complete. From a client's point of view the server won't
be seen as lagging.
BlockProcessor doesn't really need a mempool; mempools are
only useful for servers.
Set first_sync before flushing, so it goes into DB state.
Start servers immediately on catchup; mempool fills asynchronously.
Fixes#31
Neil Booth
TheLazieR Yip