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Add protocol message compression support:

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* Peers negotiate compression via HTTP Header "X-Offer-Compression: lz4"
* Messages greater than 70 bytes and protocol type messages MANIFESTS,
  ENDPOINTS, TRANSACTION, GET_LEDGER, LEDGER_DATA, GET_OBJECT,
  and VALIDATORLIST are compressed
* If the compressed message is larger than the uncompressed message
  then the uncompressed message is sent
* Compression flag and the compression algorithm type are included
  in the message header
* Only LZ4 block compression is currently supported
This commit is contained in:
Gregory Tsipenyuk
2020-02-15 10:50:52 -05:00
committed by manojsdoshi
parent ade5eb71cf
commit 758a3792eb
14 changed files with 875 additions and 37 deletions
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9
src/ripple/overlay/impl/PeerImp.cpp
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@@ -86,6 +86,7 @@ PeerImp::PeerImp (Application& app, id_t id,
, slot_ (slot)
, request_(std::move(request))
, headers_(request_)
, compressionEnabled_(headers_["X-Offer-Compression"] == "lz4" ? Compressed::On : Compressed::Off)
{
}
@@ -219,7 +220,7 @@ PeerImp::send (std::shared_ptr<Message> const& m)
overlay_.reportTraffic (
safe_cast<TrafficCount::category>(m->getCategory()),
false, static_cast<int>(m->getBuffer().size()));
false, static_cast<int>(m->getBuffer(compressionEnabled_).size()));
auto sendq_size = send_queue_.size();
@@ -246,7 +247,7 @@ PeerImp::send (std::shared_ptr<Message> const& m)
boost::asio::async_write(
stream_,
boost::asio::buffer(send_queue_.front()->getBuffer()),
boost::asio::buffer(send_queue_.front()->getBuffer(compressionEnabled_)),
bind_executor(
strand_,
std::bind(
@@ -757,6 +758,8 @@ PeerImp::makeResponse (bool crawl,
resp.insert("Connect-As", "Peer");
resp.insert("Server", BuildInfo::getFullVersionString());
resp.insert("Crawl", crawl ? "public" : "private");
if (req["X-Offer-Compression"] == "lz4" && app_.config().COMPRESSION)
resp.insert("X-Offer-Compression", "lz4");
buildHandshake(resp, sharedValue, overlay_.setup().networkID,
overlay_.setup().public_ip, remote_ip, app_);
@@ -945,7 +948,7 @@ PeerImp::onWriteMessage (error_code ec, std::size_t bytes_transferred)
// Timeout on writes only
return boost::asio::async_write(
stream_,
boost::asio::buffer(send_queue_.front()->getBuffer()),
boost::asio::buffer(send_queue_.front()->getBuffer(compressionEnabled_)),
bind_executor(
strand_,
std::bind(